J tv’sStructures
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Advanced Works
Works constructed beyond the glacis, but close enough to be within musket range of the main fortification.
Ammunition
Shells and cartridges used by artillery.
Ammunition Lift
A lift used to raise shells and cartridges from the ammunition stores to the gun platforms.
Ammunition Store
A building used to store shells and cartridges.
Angle of Defence
The angle formed by a line of defence, and the portion of another work from.which it is flanked.
Angle of the Flank
The angle between a bastion’s flank and the curtain wall.
Approaches
Trenches dug by attackers towards a fortification that gave cover to their approache.
Apron
A lead sheet placed over the vent when the gun is not being used.
Arc of Fire
The left to right angle of fire of a gun or battery, usually measured in degrees.
Armament of a Fortress
Permanent or fixed weapons of a fortress.
Ambuscade
A hidden position from which troops can launch a surprise attack.
Armstrong Gun
A rifiled breach loading gun firing an elongated projectile from a barrel constructed from wrought iron hoops. The projectile was coated with a lead alloy sheath. The gun was designed by William Armstrong and made at his Elswick Ordance Company from 1854.
Armstrong’s Protected Barbette
A system to load a muzzle loading gun from an undercover position. To load the traversed to the side and depressed to 13 degrees. The charge and rammer sits in a pivoting trough located within a loading passage. A winch and wire rope is used to ram the charge into the barrel.
Artillery
Ordnance and the men used in its operation.
Artillery Store
A building for the storage of artillery equipment. The four main types are:
General Artillery Store
Used for reserve and unservicable stores. Fitted with books racks and bays.Does not se eve any particular guns so can be anywhere within a fortification.
Artillery Store for small stores
For sights, breach pieces, removable items. Will be sited near the guns. Should not serve more than eight guns.
Side Arm and tackle store
Stores items used to load and fire a gun such as rammed and sponge. Will have rack and bays for each gun.should not serve more than eight guns.
Smiths shop
Contains a forge and items used make repairs to weapons and mounts.
Axis of a Gun
The imaginary line running through the centre of a gun’s bore.
Banquette
An infantry firing step located behind a parapet which enabled troops to fire over it. It can be formed of earth, stone, bricks or strips of wood.
Barbette
An artillery firing position with a parapet low enough for the guns to fire over without needing embrasures. Barbettes were used when a wide arc of fire was required, such as when firing on moving ships.
Barbican
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Barrack
The living quarters of a fortification’s garrison.
Barrack Master
The officer who supervises the barracks and is responsible for their condition.
Barrier
The line in a magazine beyond which magazine regulations apply. Normally this was in the shifting lobby, where the room was split into a clean and dirty side. Often a wooden lifting bar was fitted that made anyone passing beyond the barrier having to step over it.
No items of equipment or tools used outside could be used inside the barrier. All packaging and cases had to be cleaned before passing the barrier, and all men change from their uniforms into magazine clothing and shoes.
Bastion
A part of a fortress which projects in front of the main ramparts. It allowed the ramparts to be defended with flanking fire.
Bastionette
A small bastion which is somtimea located on the outer side of a moat, extending from the tip of a bastion.
Batardeaux or Baterceau
A dam to retain water in a ditch.To prevent an attacker using to cross the ditch it may have a knife edge.
Battening
Timber cladding of the floors and walls of a magazine.It is used to reduce damage to powder barrels and other stores. It was used in magazines were contained powder not !made up into cartridges but from 1888 onwards it was not used where cartridges only were stored.
Lighter battering was 6″ battens 3 /4″ thick. Where heavy weights had to moved across it they would be 3″ wide 1 7/8 ” thick. Brass screws were used to fix the battens. Both battens s would be clear of walls by 1″ Nd preserved by tar.
wall patterns prevented grit being knocked off and will have air gap behind.
Batter
The inward slope of the face of a revetment or wall.
Battery
A group of guns and their associated equipment, or the place that they are mounted.
Battery Command Post
The position from which the guns in a battery were commanded.
Battery Observation Position
The position from which targets for a battery are observed. The bearing and ranges of targets are observed and calculated and sent to the guns.
Bed of a Howitzer or Mortar
The framework on which a howitzer or morar was mounted when used in a fortification.The
Berm
A ridge,space or path between the rampart and escarp of the ditch used to prevent earth from falling into the ditch.
Black Powder
A specific gunpowder mix.
Blank Charge
A powder only charge for a gun.
Blocks
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Two types, ropped strapped called Admiralty Blocks, and iron iron strapped called Bothways block.
Block Trail Carriage
A gun carriage in which the rear trucks are replaced by a block of wood. Carronades were often used for Carronades.
Blocked up Slide
A carriage raised on a central pivot. This allowed the gun to fire over a parapet rather than through an embrasurI
Blockhouse
A small detached fortification that acted aad an infantry strongpoint. Normally it was a rectangular building with loopholes which could act as a barracks or guard house.
Board of Ordnance
The government department responsible for armanents and military stores.
Body of a Work
The line of works that form the main enclosure of a fortress.
Bolt Passage
A circular passage on sea forts running around the inside of the masonry structure. It has joked for bolts to bolt on iron armour.
Bombproof
A casement or building with an earth covering to protect against plunging fire.
Bonnet
A small triangular work placed in front of the salient angle of a ravelin.
Boom
A floating structure or net placed across a harbour entrance to prevent enemy vessels or submarines from entering.
Bounding Fire
See Ricochet fire.
Bore
The hollow part of a gun down which the shell or ball travels when fired.
Brestwork
A rampart made of earth piled up brest high.
Breach
An opening in a fortress wall.made by besieging gunfire that would be used by assaulting infantry to gain access t o the fortress’ interior.
Breech
The rear part of a gun forming the end of the bore opposite to the muzzle.
Breech Block
The part of of breech which is opened to load a breech loading gun.
Breeching Rope
A large diameter rope secured to a guns carriage used to check the recoil or secure it when not in use. Loops to secure these ropes were fixed to either side of him ports.
Breech–Loading Gun (BL)
A gun which is loaded by opening part of the breech.
Breech Screw
A threaded breach block with fits into a thread cut into the breach. Armstrong guns used a breach screw.
Brennan Torpedo
A wire guided torpedo launched from shore batteries. It was in use from 1887 to defend harbours.
Bridge
A raised roadway crossing a ditch. The inner end is normally movable to prevent attackers reaching the fortification entrance. This could be by lifting, lowering, rolling or swinging.
Bridge–head
A work built to cover a bridge across a river. The fortification is open at the rear with its flanks lying on the river banks.
Brigade
An army unit commanded by a brigadier consisting of several regiments, squadrons, or battalions.
Buffer
A device that takes up the shock of a gun’s recoil.
Buffer, Hydraulic
A system to to take up the recoil of a gun forcing fluid through a small aperture by a piston. The buffer is connected between the gun’s platform and slide. a
Bulwark
An old term for a blockhouse or bastion.
Cage
A metal frame in an ammunition lift for placing the projectile or cartridge cylinder.
Calibre
The diameter of a gun’s bore. It can also describe a gun’s length.?
Canister Shot
See case shot.
Cannon
A word sometimes used to describe any form of gun. Originally it only referred to a gun with a barrel length of at least twelve times that of the diameter of the balls it fires.It fired horizontally or at low angles.
Cap Square
An iron plate that fits over a gun’s trunnion to hold the barrel in the carrage.
Capital
The imaginary line of a work bisecting the most prominent salient angle. In a symmetrical fortification it will divide the work into two equal parts.
Caponier or Kaponier
A structure projecting into a fortification’s ditch that provides flanking fire along the ditch. It can also be a passage across a ditch for communicating with outworks.
Carbine
A short barrelled weapon used by the cavalry, engineers and artillery.
Carcass
An incendiary shell fired from mortars or howitzer. It was designed to stick to surfaces and spread fire. It achieved this with a full of a mixture of saltpetre, turpentine, sulphur, resin and tallow.
Care and Maintenance
The maintenance of coast defence guns by District Gunners , who were retired gunners or civilians. This enabled the guns to be immediately available if needed.
Carnot Wall
A detached was built at the base of a Rampart. The two are separated by Chemin des Rondes.
Carriage
The cradle in which a gun is mounted.
Carronade
A large calibre short ranged gun used as an anti-personnel. It was first produced in the Carron Works, Scotalnd in 1762. The cannon had no trunnions but was instead secured to its carriage by a loop.beneath its barrel. Carronades were used in flank defences of fortifications, where case shot was used.
Cartridge
Gunpowder made up.as a charge for a weapon. For muskets paper was used, and for larger weapons silk.
The used of paper led to the term ‘cartridge paper ‘
Cartridge Filling Room
A space used to fill cartridges with gunpowder. In some cases it was inside the magazinee. From 1880s onwards the filling rooms became unnecessary as the cartridges were delivered to the fort filled. The spaces then became cartridge stores.
Cartridge Lift
A shaft and equipment used to.raise cartridges from their store to the gun platform.cartridges were transferred in cages lifted by a block.and tackle.
Cartridge Store
A space used to store powder that had been made up into cartridges.
Casacable
The part of a gun to the rear of the vent. It also refers to button on the end of a breech that maybe in the shape of a ring to take a rope.
Case
The method used to lay a gun. Named Case I, Case II, or case III.
Casement
A bombproof vault built of stone or brick and usually covered with earth. It was used as a gun emplacement soldiers quarters.
Casement Platform
A slide made for use in a casement.
Case Shot
Shot fired from a smooth bore gun that splits open on leaving the gun to re!ase a large number of lead balls.It was used against attackers in a ditch.
Cavalier
A secondary rampart built to defend hollows or other ground that could not be seen from the ramparts.It may sometimes be bui!t inside the main work but at a higher level that enabled guns to fire over its ramparts. Cavaliers were usually on top of a bastion.
Central Pivot Mounting (C.P.)
A pivot mounting for a gun built around a shaft sunk into the ground.
Chamber
The space at the breech end of a gun where the charge sits when loaded.
Charge
The powder of the correct amount used to fire a projectile.
Chase
The section of a gun in front of the trunnions.
Chassepot
A breach loading rifle used by calvery .
Cheek
The side of an embrasure or gun carriage.The
Chemin des Ronde.
A patrol path or passage usually located at the foot of a rampart but above the escarp.It had a parapet to provide cover.
Chevel–de–fries or Chevaux-de-Freses
A temporary barrier.made of a large horizontal wooden beam with pointed piles of iron or wood passed through it. Several could be joined together. Used to block the entrance to redoubts , close passages, or close breaches.
Chicane
A drawbridge located inside a passageway, or a zig-zag approach to a gate.
Chocks
Traverse blocks of wood onto which the gun carriage sits .
Clinometer
An instrument used to measure a gun’s angle of elevation or depression from the horizontal.
Crochet
A passage around the head of a traverse that allowed t troops to pass along a covered way.
Chronoscrope
A device to measure the speed of a projectile. It consi red of rings inside the bore fitted with wires which were broken as the projectile pass ed through them. This caused sparks which the chronoscope recorded on a spinning blackened wheel.
Citadel
A strong point in a defence line or a self contained fortress intended to be used as a last place of resort.
Clearance
The distance between the bore of a gun and body of a projectile. This was also called the windage.
Clinometer
An instrument used to measure the angle of elevation or depression of a gun.
Closed Work
A fortification where the gorge as well.as the front and flanks has a parapet.
Coast Brigade
An organisation founded n 1771 responsible for the maintenance and and upkeep of the guns and equipment of coastal defences. The brigade was abolished in 1891.
Coastal Defence Artillery
Units to defend the coast against attack.
Coehorn Mortar
A light mortar of 5.5″ or 4 .4″ calibre named after the the Dutchman who first produced them.
Coil
Got iron bar wound around a former to make a barrel of a gun. The coil is hammered and welded before being bored and turned to the correct dimension s .
Coin
A wooden wedge placed under the breech of a gun to give the required elevation.Often coins were fitted with metal on top and bottom to reduce wear.
Collimator sight
A telescopic instrument used to sight a gun.
Collingwood Mounting
A gun mounting which is loaded pivoting the slide horizontally at is front end whilst the other end is supported by a hydraulic ram. The ram lowers the gun and slide to its loading position which is at the guns maximum elevation.
Colonial Carriage
A carriage used in the British Colonies to mount a 64per RML.
Command
The height of a crest of parapet above its plane of site or if not a level site above a datum .It is also used to described the height of a work above an other or the surrounding land.
Commissariat
The department that provided provisions to the army.
Commission (Royal)
The commission set up in 1859 to consider the defences of the United Kingdom. Its recomendation s led to the building of the forts now known as the ‘Palmerston Forts’.
Common Shell
Shells used against ‘common targets’ as opposed to those for thick armour.
Company
A unit of 60 to 100 men under the command of a captain. It was a subdivision of a regiment.
Communication line of
Trenches dug to.link positions.
Compressor
A device on a gun carriage that checks the recoil or retains the gun in its run-in position.
Congreve’s Rocket
A stick stabilised rocker fired from fired from a long tube. It was devel opp ed by Colonel William Congreve.
Converted Gun
A smooth bore gun that had been converted to a rifiled barrel using the Palliser system.
Cordite
An explosive used to fill cartridges as a propllent.It was made from.nitroglycerine and nitro cellulose, and was formed into sticks or cords.
Cordon
A rounded projecting stone course at the top.of a scarp wall. The cordon defined the magistral line.
Also which projects above the revetment , just below the parapet to make it difficult to scale the escarp.
Corrections
Adjustments made when firing gums .
Counter Battery
A n artillery batter used d to fire against besiegers.
Counterfort
A buttress built to the rear of a scrap to strengthen it, often it was arched over.
Countermines
Galleries dug to counter an attacking forces mining.
Counterscarp
The exterior slope of a ditch. It is the slope opposite the Scarp facing the fortification.
Counterscarp Gallery
Chambers built into the counterscarp with firing positions covering the ditch.
Counterweight Carriage
A disappearing gun carriage, also called ‘Moncrieff mounting’. The force of recoil pushed the gun down to its loading position whilst raising a counterweight. The counterweight would be locked into position whilst being loaded. Once ready to fire the weight would be unlocked, raising the gun back to its firing position.
Coupure
An entrenchment made behind a breach of a fortification, or a passage made to allow sallies.
Counterguard
A small rampart built In front of the point of a bastion consisting of two long faces running parallel to the faces of the bastion.
Covered Way
A sunken path protected by a n earthworks running around the outer edge of the ditch. The glacis forms its parapet and is built to provide a musketry defence position. Sometimes called Advanced ditch.
Crab
A hoist used to lift ammunition or guns.A crab consisted of a cast iron bracket, oak frame and windless.
Cremaillere
A saw toothed trace to a fortification that gave greater flanking fire , usually applied to fieldworks.
Crenel
A gap in a parapet between merlons to allow a gun to fire.
Crenellations
A group of crenel, sometimes called battlements.
Crochet
A passage around a traverse to give path along a covered way.
Cross Fire
Lines of fire from two or more guns in diffetent positions that cross each other in a particular spot.
Crossing Plate
A plate fitted over the rear racers of guns in casements when the guns are close together and the racers cross.
Crown Work
An outwork of two demi-bastions on either side of a bastion with curtains.
Cunnette (or Cuvette)
A trench in the bottom of a ditch to carry off water, or to deepen it. It can be filled with water to form an obstacle.
Cupola
An armoured dome housing a gun, observation post or searchlight.
Curtain
A part of a work that joins two bastions on the main line of defence. The wall between two bastions that was the strongest part of the fortress.
Cylinder
A container made of zinc used to.store and transport cartridges for large guns.
Davit
An iron post fitted with a pulley used to hoist up many ammunition. A Rifile Muzzle loader gun would have a muzzle davi t to load the shell.
Dead Angle
A part of a work which cannot be defended by fire from its own fortification.
Defence Electric Light
A searchlight on coastal fortification used for illuminating target ships at night.
Demi–bastion
Half a bastion used as a hornwork.
Depression
The angle of a firing gun below horizontal, it is the opposite to elevation.
Direct Fire
Fire aimed directly at a target.
Disappearing Mounting
A mount where the gun is only raised for firing but is hidden otherwise. Developed by Col. Moncrief.
Ditch
Trench or excavation at the foot of a rampart. It provides a barrier to the enemy, provides earth for rampart, and increases the elevation of the rampart without increasing its exposed face to fire .
Drop Ditch
A deeper section of a ditch in front of casements or musket galleries that prevents easy access to them.
Elevation
The angle of a firing gun above horizontal.
Emplacement
A gun or searchlight position.
Embrasure
An opening in a parapet or wall through which a gun can be fired.
En–Barbette
A gun raised so that it fires over a parapet’s crest rather than through an embrasure.
Enceinte
The main line of bastions and their curtains of a fortress, excluding the outworks.Sometimes known as the ‘body of the place’.
Enfield
The rifle used by the British Army from the 1860s.
Enfilade
Fire from a flank that sweeps a work with fire.
Enfilade Fire
Fire that sweeps a target from end to end .
Entanglemet
A defensive barrier which is quickly raised on a glacis, ber m or in the bottom of a ditch.It usually made of wire.
Entrenched Camp
A protected place for an army to assemble or re-group.
Entrenchment
An earthwork of trenches and parapets.
Epaulement
A parapet for cover and not defence, it therefore has no banquette.Also a fortification protecting a garrison from flanking fire.
Eprouvette
A cannon used to measure the quality of gunpowder . It consisted of a barrel suspended from a cradle whose movement when fired gave an indication of the powder quality.
Equilibrium Bridge
A movable bridge across a ditch which moved in an horizontal line in an arrangement that kept it in equilibrium.
Escalade
Using ladders to climb walls.
Escarp
The outward slope of a rampart, and therefore the inner slope of the ditch. It may be revetted as a retaining wall for the rampart, or it may be an independent scarp wall detached from the rampart. Also called a Scarp.
Escarp en Descharge
A counter-arched or hollow revetment constructed in a way that allows earth piled into the arches can fall to consolidate the scarp or counterscarp.The revetment may have galleries in the rear of be filled from the rear.
Escarp Gallery
A line of chambers built with an escarp that provide communication around the escarp, or allow defence of the ditch through loopholes in its walls.
Examining Room
A space used to examine powder barrels on arrival. It is normally located next to a magazine.
Expense Magazine
A small magazine close to a battery in which powder is stored ready for immediate use by the guns. It is normally located on the terreplein or in the caponiers.
Explosive
A chemical which when initiated exerts a sudden and intense pressure.
Expose
To switch on a searchlight.
Exterior Crest
Outer edge of a rampart between the exterior slope and superior slope.
Exterior Slope
The outer slope of a rampart beneath the parapet and below the exterior crest. It is at the angle that loose earth forms, which is about 45 degrees.
Face
The two sides of a bastion which meet at an angle that projects out towards the enemy. Or the front of a fortification.
Facine
.A bundle of brushwood used to strengthen earthworks and trenches.
Fausse–Braye
An outer rampart separated from the main rampart, normally at a lower level.
Fence
Used in place of an escarp or as ditch defence. Morton’s wire fencing was used for boundaries. This had iron uprights and galvanized iron wire kept under tension with cog and ratchet.
Field
The area on which a battle is fought.
Field Force
Soldiers required in addition to those of a garrison of a fortress. They performed watch and guard duties in the spaces between fortifications. They could also build field fortifications. It was calculated that 33 men would be needed for every 100 yards.
Field Fortifications
Temporary fortification built to strengthen the permanent fortification s and the field force position.
Field Gun
A wheeled gun that can be taken out from a fort into the field.
Field Piece
A cannon taken by armies to be used in the field of battle.
Fighting Lamp
A lantern used to illuminate a gun’s breech for night firing.
Fire Command Post
The position from which a group of guns are controlled.
Firing Step
A raised section behind the parapet that formed a step for soldiers to fire from. It was also called a Banquette.
Fixed Ammunition
Ammunition which has the shell and cartridges were combined in a single unit.This would allow quick loading.
Flank
The part of a bastion that joins onto the curtain, and which the guns for flanking fire are mounted. It is the side of a work between the face and curtain.
Flanked Angle
A salient formed by two lines of defence.
Flanker
A fortification projecting so as to command the side of an attacking force. It is located to allow flanking fire across the curtain.
Flanking Gallery
A gallery with gun positions to fire along the length of a wall or ditch.
Flanking Fire
Gun fire that hits the side of an enemy, it is aimed parallel to a wall or ditch.
Fleche
A simple and easy to build arrow shaped field work of two faces that form a salient angle. The rear of a fleche would be open and not easily defended.
Forage Store
A structure for storing food for horses. It is normally located near to the stables.
Forge
A fire for repairing gun carriges and artillery artillery. equipment
Fougasse
An improvised mortar made from an excavation in the ground that fired stones or pieces of iron.The hole was from 3 to 10 feet deep.
Fort
A closed work which has parapet flank defences covering in ditches. It is a structure designed primarily for defence.
Fortification
The making of a military position defensible.
Fortress
A major fortified location capable of containing a large force. It is often a town.
Fraises
Sharpened pallisades or stakes fitted on the slope of a rampart, Counterscarp or scarp to slow down an attacking soldier s.
Fraser Construction
A method of building large RML guns from coils that used a few large coils instead of several smaller ones. It was a system invented by W. Fraser.
French Grooves
A rifiling system in which the driving edge has a smaller inclination than the loading side. This arrangement causes the projectile to centralize itself.
Friction Tube
A device used to fire a gun. It consisted of a copper tube filled with gunpowder that was inserted into the vent of the gun. The bottom was sealed with a cork plug and shellac.A friction tube was not needed for QF guns as a percussion primar was fitted to the base of the brass cartridge.
Front
The distance between the salients of two bastions.
Fuze
A metal or wooden tube placed in a shell to explode it.
Fuse and Tube Shelf
A shelf in a shell store or she’ll recess for the storage of fuzes. It normally consisted of four box compartments, open at the front for the storage of fuses. Tubes are stored on the top.
Gabion
A wickerwork cylinder filled with earth used to strengthen ramparts or make entrenchments.
Gabionade
A retrenchment made quicly from gabions to fill a breach.
Gallery
A passageway built inside the walls of a fortress at its based.
Galloping Carriage
A gun carriage used for a light gun that could be drawn without a limber. The carriage had shafts to enabler to be drawn and act as its trail when fired.
Gard–Fou
A fre e-standing wall located on the top of a revetment to protect sentries or gunners.
Gardner Gun
A machine gun of one, two or five barrels fed by a vertical magazine and operated by a crank. It was invented in 1874.
Garrison
The troops based in a fortress to.defend it.
Garrison Artillery, Royal
Men whose role was to man the guns of a fortress.
Garrison Platform
A platform used for garrison guns in permanent fortification s. It was usually of stone and laid at an incline of 1:15.
Garrison Standing Carriage
A carriage used for guns not to be placed on the front faces of the fort.It was made of two wooden cheeks carried on four wheels.The carriage stood on a platform of stone, concrete or wood with a slope 1:24. Some later carrages were made of iron.
Gas Check
A flat plate of metal used in a rifled gun to seal the b ore and impart spin to a projectile.The plate behind the projectile when the gun is loaded and it falls away when the shell leaves the muzzle.
Gas checks removed the need to have studs on the shell, they were replaced by copper driving bands on shells.
Gas Escape
A hole in a gun’s breech used as an indicator of a failure of the gas ring or steel barrel.
Gas Ring
A seal fitted to a RML where two parts are jointed
Gatling Gun
A 10 barallel machine gun rotated by a crank.
General Artillery Store
An artillery store for unserviceble and reserve stores that are not needed for immediate use by the guns.It can be located any coveniniant location within a fortification and is fitted with hooks, bays,racks, shelves and benches.
General Service Wagon
A wagon used to transport food and stores.
Genouillere
The part of a parapet beneath an embrasure.
Gin
A tripod used to mount or remove gun barrels into their mountings .
Glacis
A mass of earth raised on the outer side of a ditch forming a long slope down to the normal ground level. The guns sited on the terraplane could sweep the slope and the earth provides protection to the scarp wall.
Gomer Chamber
A chamber in the bore of a gun to concentrate the charge.
Gorge
The rear face of a fortification. A line joining a works inner extremities.
Grazing Fire
Fire that passes close the the surface.
Groove
Part of a gun’s rifling.
Ground Platform
A gun platform made of heavy planks and beams that is laid on the ground.
Guerite
A sentry box or turret situated on a bastion’s salient angle that projects out over the ditch.
Gun
A cannon used for firing on a flat trajectory over a long distance.
Gun Bank
A raised platform of earth that enables a gun to fire over the crest of a parapet.
Gun Cotton
An explosive consisting of cotton, hemp or linen s oaked in nitric acid. Gun cotton was brought into service in the 1890s and formed the base of many smokeless powders used in the later Victorian period.
Gun Portion
Half of the merlon on each side of a gun.
Gun Powder
An explosive made of charcoal, sulphur and charcoal. The grain of a gunpowder refers to its density, fine grain explodes quicker than large grain. The larger grains are used for larger guns.
Gun Tackle
The blocks and ropes used to raise and lower a gun on a sliding platform.
Gyn
A tripod used to lift and mount guns.
Gyn Tackle
The lifting tackle used with a gyn.
Haxo
A casement on a terreplein providing overhead cover for a gun.
Hele’s Rocket
A rocket that used spin for stabilising rather than a stick. The spin was imparted by baffled deflecting the propelling gas. It was developed by William Hele in 1845 and became obsolete in 1902.
Half Closed Work
A fortification in which the rear is closed by a thin earth rampart, line of obstacles or stockade.
Handspike
A wooden bar used to move a gun or carriage by leverage. The handspikes for heavy guns were shod with iron to reduce wear. Some larger spikes were fitted had a roller on its end to make moving the gun easier.
Haxo Casement
A vaulted casement that had overhead cover for a gun and its crew. It was invented by General Haxo. They were covered with a mass of earth.
Heavy Artillery
Guns used as fortress defence in fixed batteries.
High Angle Fire (H.A.F)
Fire from guns from a parapet at high angles of fire , in a range of 75 to 83 degrees elevation.
High Explosive
An explosive of high power and rapid action .
Hornwork
An outwork made of two demi -bastions that are joined by a curtain wall. The work is joined to the main fortification by two parrallel wing walls. Sometimes called a Crownwork.
Hot Shot
A heated shot used to set fire against wooden ships or buildings.
Hot Shot Furnace
A furnace used to hear up hot shot. Addison’s portable furnace came into use in the 1860s. Once at full working temperature it took 15 minutes to heat eacHowitzer H
Howitzer
A short barreled weapon used to fire explosive shells in a curved or indirect fire. The later howitzer could fire at a high angle, up to 45 degrees, and a low velocity.
Hurter
A piece of timber used to protect the inside of a parapet from gun carriage wheels. It was fitted at the head of the platform next to the interior slope of the parapet.
Hydraulic Disappearing Mounting
A disappearing mounting in which the gun is returned to its firing position by hydraulic power.
Hydropneumatic Disappearing Mounting
A gun which was returned to the firing position by hydropneumatic power.
Impliments
See sidearms.
Indirect or Curved Fire
Fire at an elevation up to 15 degrees using guns at reduced charge or howitzer and mortars.
Interior Slope
The inside slope of a parapet that is steep to allow men to stand close to its crest when firing.
Interior Crest or Crest
The top edge of the parapet where the superior and interior slopes meet.
Intermediate Works
Temporary works built between the permanent works of a line of defence. They could consist of trenches, batteries and redoubts.
Intrenchment
A trench or ditch
Intrenched Camp
A pre-prepared position to which a n weaker force could retreat and reorganise.
Invalide
A.section of the Royal Artillery that was replaced in 1859 by the Coast Brigade.
Issue Bar
An iron bar at the top of a lift shaft used to lift shells out of the lift.
keep
A strong structure within a fortress that would act as the last defendable position.
Laboratory
A room.where gunpowder was mixed or charges made up.It later became a space were activities related to handling gun cotton were carried out. It was under magazine regulations and normally consisted of two rooms with a shifting lobby at the entrance. The inner room was for filling and examining the outer room examining prior to filling and checking packages.
Ladder Lift
A cartridge lift consisting of an endless chain ladder onto the rungs of which the cartridges were placed.
Lamp
A lantern used to light a magazine or gun emplacement.
Lamp Barrow
A wheeled conveyance for transferring lamps to the lamp reccesses from the lamp room.
Lampman
The man who maintained the lamp s in a fort, especially in the magazines. This included their lightin g.
Lamp (or Lant ern) Recess
A small tunnel or alcove in a wall for placing a lamp. To prevent a spark entering a magazine it would be fitted with a pane of glass in a brass frame. In longer recesses the lamp may be placed on a tray or trolley running on rails moved by a hooked stick or endless leather strap.
Lamp Room
A room used for the maintenance and cleaning of lamps.
Land
The space between a gun’s rifiling grooves.
Land Mine
An explosive charge detonated by electo contacts or trip wires. They could be placed in a defensive pattern on the glacis.
Lancaster Carbine
A Snider converted carbine used n the Royal Engineers.
Lancaster Gun
A gun firing an elongated shell down an oval bore with a twist that gave spin to the shell. It was introduced my Mr. Lancaster.
Lanyard
A tarred light cord or rope attached to a friction tube which was pulled to fire the gun.The lanyard had a wooden toggle at one end to pull on and the other end was attached to the ring of the friction tube. A garrison lanyard was just under 12 feet long.
Latrine
A soldier’s toilet.
Laying a Gun
Adjusting a gun so it aims at a target.various combinations of methods were used for coastal defence, with the gun layer, gun captain, position finding station, and depression range finder station being used as appropriate.
Lee–Enfield, Long
A magazine loaded rifle brought into service in the 1850s.It had a range up to 900 yards.
Lee–Enfield Short
This version was used by rifile corps and infantry sargents. It had an effective range up to 600 yards.
Lee –Metford
A magazine rifle introduced in 1888.
Lift
A shaft used to raise cartridges and shells from the magazine to the higher gun level.It could be a cartridge lift, shell lift, ammunition lift or general lift.A return lift was used to returning practice rounds to the stores.
Lifting Bridge
A drawbridge which was hinged at the inner end so that it could be raised by chains attached it.
Lifting Eyebolt
A ring screwed into the the head of a large projectile to help with its loading.
Light Balls
An oblong canvas case stretched over a wrought iron frame filled with a substance that burnt with a intense fla me . They were used to light up an enemy at night.
Lighting (Lamp) Passage
A passage built next to a magazine to allow lamps to be placed into the recesses to light the magazine.
Limber
A two wheeled hitch between a gun carriage and the horses that pulled it.It supported the trail and carried some ammunition, tools and equipment.
Line of Defence
The line of the top of a scarp that received flank defence. Also a line drawn from an angle between a curtain and the flank of a bastion to the shoulder of the opposite bastion.
Line of Fire
A imaginary line from.The muzzle of a weapon to the point being aimed at.
Line of Metal Marking
A cross line marked on the right trunnion of a gun showing the intersection of the surface of the metal by the vertical passing through the gun axis when the trunnions are horizontal.
Line of Sight
The visual line passing through the two gun sights and the target.
Lines with Intervals
A series of detached fortifications placed at intervals that give protection to each other by their fire crossing in the interval between them.
Liner
The inner tube of a gun that lined the bore.
Linestock
A shaft that held a slow fuse that fired a gun.
Load
To ready a gun for firing by putting in a cartridge and shell.
Loading Bar
A short iron bar into which the tackle is attached that is used to raise a shot to a muzzle. The bar was located over and just in front of the point at which the gun comes to test after recoiled.
Lodgement
A temporary defensive work built on a captured part of an enemy fortification.
Loop
An iron ring used the suspend a gun when being mount ed . It is often found on the centre line in the vaulting of a casement.
Loophole
An slits or openings in a wall for firing a rifile through. Each position needed 3 feet of wall space. To prevent bullets from entering brick ones are stepped and concrete ones sloped. They are often skewed to fire on a specific position.
Luff Tackle
A tackle consisting of one single when one double sheaved block.
Lunette
A work with two faces forming a salient angle and two flank faces parallel to the capital.The flanks are normally perpendicular to the firing direction. It was used to cover a ravelin.
Lyddite
An explosive made from picric acid used as a shell filling.Named after the Lydd testing ground.
Machine Gun
A gun able to fire multiple shots in succesion .These came into use in forts from the 1880s to replace the smooth bore guns used in the flanks.
Machine Shed
An artillery store for storing the equipment used to transport and mount garrison guns.
Machicoulis
A projecting gallery used to defend a ditch or gateway.
Machicolation
An opening for firing downwards to the foot of a wall. It can be in the form of a projecting gallery.
Magazine
A building used to store gunpowder in barrels or cases.The word was sometimes used to describe any ammunition store.
Magazine Conditions
The safety regulations concerning the storage of ammunition.
Magistral Line
The line of the top of the scarp. It is drawn thicker on a plan.
Mantlet
A curtain of woven rope hung in an embrasure to protect a gun crew of a large gun from material flying into the casement of the exterior face is hit.
Mantlet Bar
An iron bar fitted across an embrasure to hang a mantlet from.
Mantlet Door
A door fitted to the magazines to limit the force of an explosion. It consisted of layers of matting fitted on a strong angle iron frame.
Martello Tower
A small circular coastal fortification used to mount artillery
Martin’s Shell
A hollow spherical shell insulated with a loam and cow hair mixture into which was filled with molten iron. It became obsolete in 1869.
Martini Henry Rifle
A single shot rifle that came in use from the 1860s that combined the Martini falling breach and Henry barrel. It has an extreme range of 3,000 yards.
Maxim Gun
A single barralled machine gun fed from below by loops on a band contained in a box. The gun fired at 600 rounds per minute.
Merlon
The solid section of a parapet between two embrasures.
Militia
Reserve force of part time soldiers
Militia Artillery
A reserve military artillery.
Mine
A tunnel dug to attack or defend a fortification.
Or
A charge of high explosive used as a land or sea mine.
Minie Rifle
A rifle that had a ball.with a small iron cup in a hollow in its rear. This caused a ball to expand on firing to fill the groves.
Mitrailleuse
Murlti-baralled breach loading semi-machine gun.
M.L.R
A muzzle loading rifled gun.A term used to describe new rifiled guns rather than converted smooth bore guns.
Moat
A ditch, it can be dry or wet.
Moncrief Gun
A disappearing gun in which counterweighted barrel was lowerd down into a pit between firing that provided protection and concealment. In Moncrief ‘s full system th ese pits would be dispersed , but this the weapons were not deployed in this manner.
Mortar
A short barraled, large calibre gun firing a heavy shell at a high angle of elevation, between 15 and 5o degrees. The name came from its resemblance in shape to the chemist’s mortar. They were not fitted with wheels.
Mortar Battery
A position for protecting and concealing a group of mortars. The battery may be casemated or in open pits.
Mouth
An embrasure’s exterior opening.
Movable Armament
Guns that could be deployed outside of the fortification.
Motte
An artificial steep -sided mound on which is located the principle tower of a castle.
Mount
An artificial earth mound on which guns can be mounted.
Musket
A smooth bore light gun used by the infrantry.
Muzzle
The front end of a gun out of which the shot is fired, the opposite end to the breech.
Muzzle –Loader
A gun loaded from the muzzle end, as opposed to a breech loader.
Muzzle Pivoting Carriage
A gun in which the axis around which it elevated and depressed was at the muzzle. This design enabled the casement opening could be made smaller.
Needle Musket Gun
A breech loading gun in which was fired by a pin that was forced through the gunpowder by a spring. The gunpowder was ignited by some detonating powder at the rear of the bullet.
Nordenfelt
A multi-barrel gun of up to ten barrels mounted side by side.
Oblique Fire
Fire that aimed to hit a target at an oblique angle.
Obturation
The means used to seal the breech of a B.L. gun to prevent gas leakage through the beach mechanism when it is fured .
Obus–torpilles
High explosive mortar shells of about 6″ calibre .
Open Work
A fortification with parapets on the exposed sides only. This is normally the front and rear sides with the rear being open.
Ordnance
A word used to describe an artillery weapon rather than one c character carried by the infantry. Itdivuded b divided into field, heavy or siege.
Victorian types:
Smooth bore 1845′-1860
Rifle Breach Loader RBL 1860-1870
Rifiled Muzzle Loader RML 1870-1880
Steel Breach Loader BL 1880-1890
Steel Quick Fired QF 1880-1890
Wire b Breech Loader BL 1890-
Wire Quick Fire r QF 1890-
9.2″ Became staple armament of coastal defences
I
II
III B
Built in caste iron pedestal.
IV
Axial recoil, more compact . Designed to give 20 degree depression.
VCHI
XI
6″ Gun
standard coastal defence gun
I
II
Shorter recoil,on cast iron pedestal
6″ QF MK II
6″ BL MK VII
7.5″
10″
12″
Orillin
A round of earth with a wall face on a casemented battery. It covers cannon in the retired flank and prevent them being dismounted.? It is the projecting face of a bastion beyond the line of a retired flank to protect a Flanker.? Xxx
Outworks
Work that external and separate from the main body of the fortification but inside the glacis.
Overbank Carriage.
A gun carriage with a bracket for light guns that enable the gun to fire over a parapet.
Overhead Shield
A steel plate fitted as a shield to provide overhead cover.
Pallisade
A fence used as a ditch defence or a wall made of sharpened logs.
Palliser Conversion
A liner used to convert a smooth bore gun to a rifilield muzzle loading gun (RML). To fit it the bore was bored out to make it wider, a tube fitted, which was exp ended by firing a large charge.
Palliser Shell
An armour piercing shell with an extremely hard nose. It was widely introduced for RML guns after the late 1860s. It aS designed by Captain Palliser.
Parachute Light Ball
A shell formed of two thin iron hemispheres riveted together. It contained a burning mixture and a parachute to illuminate a battlefield. The light ball was fired from a mortar using a small charge .
Parados
A rampart at the rear of work that protected it from reverse shell fire.
Parade
A flat area used to muster and parade troops.
Parallel
A trench dug parallel to a work by an attacker. Several parallels would be dug in stages as an attacker got nearer the fortification.
Parapet
A bank of earth or wall enclosing a work that provided protection to the troops. Guns fire either through or over t he parapet . It s width depended on the amount of protection required, from 3 feet for musket fire to 18 feet for heavy fixed guns.
Parapet Mounting
A machine gun mount that allowed firing from the top of a parapet. It had a cross piece bar that sat on the top of the parapet.
Pas de Souris
A staircase that provided access between a ditch and terraplain or outworks.
Penetration
The distance that a shell can enter a target.
Percussion Fuse
A fus e that initiates a shell on impact. Moorsom’s fus e was introduced in 1861, and Pettiman’s in 1866.
Petard
An explosive charge used for blowing structures such as walls and gates in. It was formed of a metal bell shaped gunmetal which would be filled with powder and its mouth sealed with mastic.
?
Permanent Fortification
A fixed fortification built to remain in position for a long time, including during peacetime. The y were built to defend a country’s border or strategic position s. It is normally has masonry construction.
Perpendicular Fortification
A tenaille system ?
Piasaba Brush
A bore cleaning brush.
Pillar Loading
An unsuccessful method of loading a gun under cove r that was used with the 38 ton gun. The projectile was placed on a pillar and the barrel turned around for loading.
Pillar Mounting?
A Q.F. mounting consisting of a cylinder moving within a fixed outer one.The outer cylinder too was flush with the ground levell and the inner cylinder carries traversing and elevating gear. The cylinder is raised to fire over the parapet and lowered to hide the gun.It was used on the 4.7″ QF gun, 6 and 1 2 pounders.
Piquet or Picket
Troops deployed to form a line of security outposts.
Pistol
A handgun issued to the Calvary.
Pivot
The point around which a gun is traversed.
Pivot Block ?
The block around which the slide is connected and the slide is connected.
Place of Arms
A position for defending troops of the of outworks, or troops conducting a sortie to assemble. It is usually at in the covered way at a ‘re-entering or salient point.
Plain Groove
Gun rifiling in which the bottom of the groove was concentric with the bore.
Plane of Fire
Tbe vertical plane passing through the axis of a gun.
Plane of Site
The plane representing the general direction of the ground in which a work is built.
Platform, Gun
A horizontal stone, wood or masonry plane used to place a gun on in a fortification. Later platforms were built at an angle to check the recoil.
Platform, Mortar
Raised platforms on parade to mount a mortar on.
Platform Wagon
An open sided wagon used to transport guns and heavy associated equipment.
Plunging Fire
Fire from a position above its target.
Point Blank
The point at which a round hits the ground when the gun has no elevation. A gun is said to be laid point blank when the line of sight is parallel to the guns axis, that is it is pointing directly at the target.
Polygonal System or Fort
A fort with a polygonal trace whose weapons was designed for active defence.
Polygroove System
A rifiling system using a large number of shallow grooves. From 1859 onwards it was used for all R.B.L s.The
Port Bar
A iron bar placed across a gun port during the loading of a large R.M.L. It assisted in loading by holding up the end of the rammer stave.
Port–cochere
A roofed structure projecting out from an entrance.
Portfire
A slow burning match used to ignite the powder in an artillery piece. It was made of a length of light cord impregnated with saltpetre, sulphur and dust powder.
Port War Signal Station
A location from which vessels approaching a port could be challenged.
Position– Gun of
A gun designed for a permanent position in a fortress.
Position Finder
An instrument used to direct guns onto a target. It took into account the movement of a target, and was either of a depression or horizontal type. It was invented by Major Watkins, and came into use from 1887 onwards.
Position Finding Cell (P.F.C.)
A room or building containing the equipment the range and position of a target. It consisted of two chambers, one containing a receiving instrument and the other transmitting instrument. This later instrument may be no more than a calibrated telescope. At the receiving cell the readings from the transmitting cell and receiving cell are combined to calculate its position and range by trigonometry.
The cells were located at the flanks of a baatery , and if more than one calibre was controlle d, a position finder would be required for each one.
By plotting the course and speed of the target the predicted position of the target is passed electrically to the guns where it displayed on dials.
Cells are normally low lying concrete structures sunk into the ground with a n opening covered by iron shutters. The roof was camouflaged by being covered by earth.
inside the cells w as three concrete pillars to support the plotting table and instrument . The transmitting dials were contained in recesses in the concrete wal ls.
Postern
A secondary entrance to a fort. This may.be a side entrancsally sally port for access into the ditch.
Powder Cart
A two wheeled cart with space for four barrels of powder and a shot locker.
Powder Correction
Adjustments mad e that allow for the strength of gunpowder.
Preponderance
The excess weight at the breach end of a gun when it is balanced on its trunnion.
Preventer Rope
A rope attached to a gun slide to assist with its running out. It is fitted to an eye at the rear of the slide and around a wooden bollard on the platform.
Pricker
A thin metal spike used to pierce a charge through the vent of a R.M.L. gun before the friction tube is inserted.
Priming
Filling a vent of a gun with powder in order to fire it.
Profile
The cross section of a work through its galcis, ditch and rampart.
Projectile
A shell or shot fired from a gun.
Prolongation
A line made as an extension of an existing line of defence.
Propellant
An explosive charge used to propel a shell or shot out of a gun.
Protected Barbette
A protection for a disappearing gun, or one with depressed loading.
Prussian System
A system where the fortification act together to form a line of defence. In this system each fort is independent, but also provides flanking fire to its neighbours. It had two types of armament, long range for flanking fire, and short range for self defence. The later was normally mounted on caponiers.
Quick Fire Guns, Q.F.
A gun with a quick action breach mechanism that used a combined projectile and charge.
In the 1880s 3 pdr and 6 pdr guns were used. In 1887 a 4.7″ was introduced.
? Other guns
Quill Tube
A shaft of a goose feather filled with gun powder that was placed in a vent to fire a gun.
Quoin
A wooden wedge used to support the breech end of gun or mortar barrel. It can be adjusted to change the elevation of a gun.
Racer Track
A steel or wrought iron curved track set into a gun emplacement floor to enable the quick traversing of a gun. Racers were set in granite blocks or fixed on iron chairs.
Rammer
A tool used to ram home the charge into a gu n, or the man who rams the charge.It is a side arm with a head of elm and ash stem.
Ramp
A sloping road giving access to the terreplein from the parade level for troops, ammunition and gun carriages. Sometimes it was at right angles to the rampart to act as a traverse.
Rampart
The high earthwork bank on which guns and troops are positioned to defend the fortification. It forms the main defence of a fortification.
Range
The distance between a gun and its target.
Range Finder
An instrument used to determine the range of a target.
Range Indicator (Clock Dial)
An instrument used in coastal batteries to communicate the range and deflection of a target to batteries from a range finder. It consisted of a circular board with two hands and markings like a clock face.
Ravelin
A ‘V’ shape work in front of a rampart and its ditch and between two bastions. It can also refer to a fortified island in a moat in front of the curtain.
R.B.L.
Rifile Breach loading gun.
Rear Chock Carriage
A naval gun carriage in whwithout rear wheels (Trucks) that sits on its front trucks and a chock at its rear.
Recess
A recess in the vicinity of a gun to store charges, shells , spares and equipment.
Recoil
The reaction of a gun on firing making it move in the opposite direction to its line of fire.
Recuperator
A device to return a gun to its firing position used in later versions of breech loading guns.
Redan
An outwork of two faces and an open rear. The two faces form a salient angle. When the faces are smaller than about 20 yards it is sometimes called a fleche. Variations included double, triple and blunted.
Redoubt
An small enclosed fortification which does not have flank defences of its own ditch.It s simple structure does not have bacaponiers caponiers , or other such structures.
Reduit
A small citadel used as a last resort defence.
Re–entering Angle Re-Entrant
An angle of a work that projects inwards away from the enemy.
Refused Flank
An obtuse angled flank that cannot be enfiladed.
Relief
The height of a point in a work above the horizontal plane of the base of a scarp. The height above a plane of construction is called ‘constructive ‘ relief, and that above the ditch the ‘absolute ‘ relief. The ‘relief of the work’ is that of the crest of the parapet.
Repository Drill
Gun crew training to mount, transport and mount a gun.
Retired
A work within a bastion or other work which is given up in stages after the main defences are breached. It is a form of Retrenchment.
Retired Flank
A recessed casement or p platform within a bastion flank?
Retrechment
A line of works inside a fortification that cut off part of it to enable defence after attackers are inside the fortification.
Reverse Fire
Fire aimed to hit the rear of the enemy.
Revetment
An escarp’s retaining wall. A full revetment is one where all of the escarp i s revetted, and a demi where only part of it has a wall.
Ricochet Fire
Low angled fire that grazed the parapet to enflied the the fortification in a way that sweeps through the gun s and troops on it.q
See Bounding Fire
Rifle
A rifi led long barral led gun used by a soldier s .
Rifield Breech Loading Gun (R.B.L.)
Rifled guns using the ‘Amstrong’ system of construction.It was built up by shrinking layers of coils of wrought iron on its other. It was brought into service in 1859.
Rifield Gun
A gun with with spiral groves cut in its barrel that give spin to its projectile making it more accurate.
The projectile s fired these guns will have one of the following to give rotation
Coated with soft metal -RBL
Fitted with a driving band near its base – BL
Fitted with studs -RML
Having a copper gas check attached to its base -RML
Rifled Howitzer
A gun that could fire at a high angles and therefore give indirect fire down onto the roof of bomb proof structures.
Rifled Muzzle Loader(RML)
A rifled gun that was loaded through its muzzle. It referred to converted guns rather than those built as rifled weapons.
Rifling
Grooves in a gun’s vote which gives a spin to a projectile. Muzzle loader s needed a wider and deeper grooves to allow the studs to be engaged during ramming.
Ring Bolts
Iron rings set into a casement’s wall or floor.They were used to secure traversing and gun mounting tackle.
Rocket
These were either signal rockets or war rockets. They were first used in 1806 and the two types were Congreve ‘s or Hale’s.
Rolling Bridge
A bridge over a ditch that can be rolled back to within the gates. The most common fortification type used a rack and pinion system to operate.
Sabot
A wooden plate or cylinder attached to the bottom of a projectile that prevents damage to the barrel or projectile when it is fired and stabilizes it .
Saddle Mounting
A bracket fitted across an embrasure used to mount a light gun.
Sailient Angle
The angle of a work that projects towards the field.
Sally Port
An opening in a glacis or curtain that enabled troops to exit to engage the enemy. See Postern.
Sap
A trench dug by an attacker to advance towards a fortification. It normally followed a zig zag form.
Smooth Bore Breach Loading Gun (SBBL)
A 32pdr gun which was adapted by replacing the breach end with interrupted breech -closing mechanism. It was used to fire case shot for flank defence of fortifications.
It had a rate of fire of three rounds a minute with a maximum range of 350 yards.
Scarp
See Escarp
Sconce
A detached fort with bastions.?
Segment Shell
A thin cast iron shell lined with cast iron segments built up in layers. It was used against groups of troops beyond the range of case shot or behind cover.It was first introduced in 1860.
Service Charge
The amount of powder in a charge for a given nature of gun. A Full Service Charge was the largest recommended charge for a particular model of gun.
Serving Room
A chamber from which cartridges are issued to the guns. They are normally located at the top of cartridge lifts where the lift shafts are in side recesses and a hatch gives access to the gun floor.
Sheers
Spars of wood used to lift guns used with tackle, slings, guys,and chains.
Shielded Casement
A casemented battery with armour plated gun shields. May be single or double tiers, and also may be curved fronted.!
Shell?
A ho know gun projectile. with an explosive filling. The following types were used by coastal artillery.
Shell Bearer
A device used to lift a shell from a shell lift or shell store to a gun muzzle. It consists of a cradle fitted with handles.
Shell Block
A block of wood with a conical hole used to hold a shell point downwards to allow filing through its base. Shell blocks were located in shell filling rooms and laboratories where there would normally be a lifting ring in the ceiling above for attaching lifting tackle.
Shell Filling Room
A space in which shells were filled. often located near the guns. From the 1880s onwards the y were no longer required as shells were delivered to the fort filled with explosive.
Shell Gun
A gun designed to fire hollow shot or shells rather than solid shot of a cannon.
Shell Lift
A shaft and equipment used to raise shells from its stores to gun store. Normally it linked the shell passage with the gun casement behind the gun.
Shell Recess
A space for storing small quantities of shells near a gun. It is normally made of a cupboard like space cast into the concrete of a gun emplacement and fitted with double doors.
Shell Store
A space for shell storage.
Shell Truck
A truck used to move shells. In the shell room is was two wheeled and on the gun floor four wheel ed.
Shelving
Within a magazine it was a framework to store powder barrels and shells.The shelves were 10 inch wide supported 4″ square uprights and crosspieces. In shell stores and shell recesses their was a dedicated fuze and tube shelf.
Shiftin g Lobby
A room in which men changed in and out of magazine working cloths.It was not required for shell stores.
Shifting Room
A room in which gunpowder is transferred from one barrel to another.
shot Gun
A smooth barrel cannon designed to fire a solid iron ball or hollow shell. A
Shoulder Angle or Shoulder
The angle where the face and flank of a work meet.
Shrapnel
A shell designed to fragment on firing. It was a weapon used against infantry.
Shunt Groove
A groove of a rifled bore used to centre a projectile before it leaves the muzzle.It was not a success and was replaced by a p!ain groove.
Side Arms
The equipment used to load and fire a gun such as the rammer, sponge and wad hook.
Side Arm and Tackle Store
A store used for the storage of side arms and tackle. The store should serve not more than eight guns, but one is not needed for casement guns.The store would be fitted out with a rack for side arms with a bay per gun, brackets for tackle and shelves for brushes.
Side Closing Breech
An adaption to allow easier closing of the breach of a 40 pdr. RBL.
Siege
A planned organised attack on a fortress conducted in a staged manner.It was estimated that over six times the number of troops defending a fortress would be needed in the siege forcs.
Siege Guns
Siege Platform
A portable platform used to mount a siege gun, Mortar or field gun when firing from the same spot for an extended period.
Siege Train
A collection of movable guns and mortars to locate in field works.
Siege Wagon
A wagon fitted with movable trays for carrying shells and shot.
Siege Works
Fortified works built by the attackers of a fortress used to mount siege artillery.
Sights
Metal pieces fitted to a gun to align it onto a target.Normally they are fitted in pairs , fore sights and hind sights.
Sill
The inner edge of the bottom of an embrasure.
Six–feet Parapet Slide
A wrought iron gun slide designed for coastal batteries designed to fire over a 6ft.parapet.
Skids
Lengths of timber used to assist in the movement of mounting of ammunition or ordnance.
Skidding
Wooden shelving in a magazine for storing barrels of powder. It consisted of two parallel pieces of wood that supported the barrels testing on their ends.vertical p pieces kept the barrels from.touching the walls or rolling. In a large magazine the skidding would be d divided into bays.For stacks above five rows a horizontal transom.would be fitted.
Slide
A traversing platform for a gun.
Sling
A rope or chain fitted with thimbles used to for the lifting of ordnancy.
Sling Cart
A two wheeled cart used to move ordnance over short distances. Loads were slung underneath.
Sling Wagon
A four wheel ed wagon used to transport a gun barrels by slinging them beneath the axle trees.Forts were provided at least one to move guns up the ramparts.
Sling Wagon Shed
A building usually located on a first parade to house the sling wagon.
Slope
An angled earth heap forming a rampart, parapet or Banquette. Slopes may be defined as superior, exterior or interior.
Small Arms
Portable firearms such as rifles , cabinets and pistols.
Small Port Carriage
A gun mounting which allowed it to be raised and lowered to different heights that allowed smaller ports to be used.
Smith and Fitters Shop
A building containing a forge and other equipment used to make repairs to guns and mountings. A fitters shop will exist when there are heavy guns, this will have a drilling machine and lathe.
Smoke Ball
A paper shell that contained a burning composition that produces large amounts of smoke.
Smooth Bore
A cannon whose bore has no rifling.
Sods
Turf blocks used to stabilise the earth bank of a fortification.
Sole
Solid Shot
A round cast-iron ball .
The bottom.of an embrasure.
Speaking Tube
Metal tubes used to communicate used in coastal batteries.
Sponge
A side arm used to clean a gun bore after firing. It was a wooden cylinder covered with lambswool or similar material which was dampened with water to extinguish any burning or got material that may detonate the next round prematurely.
Spur
An arrow shaped projection from the face of a curtain wall.
Stool–bed
The flat platform fitted to a gun carriage onto which the wedge which supports the breach sits. At the breech end an elevating screw supports the bed and raised or lowers the breach, whilst the muzzle end of the bed is free to pivot.
Storm Poles
See Fraises.
Sub – calibre
A smaller gun mounted co-axially with the barrel of a larger gun for practice.
Submarine Mine
An underwater explosive charge laid in a defensive mine field.They were laid in a pattern and were donated by electricity from a control point. The minefields were covered by defence electric lights and Quick Fire guns.
Sunken Battery
A gun battery with its terraplain three feet below the ground level and the sole of its embrasure at ground level.
Sunken Loading Way
A trench in the front of an emplacement to protect the men in it and fitted with a movable loading stage on rails.
Superior Slope
The upper surface of a parapet that slopes down towards the enemy.It normally has a gradiant of 1:6.
Sweep Plate
Iron plates inserted into the floor of gun emplacement used to traverse a gun.
Swing Bridge
A bridge over a ditch that pivots around its vertical axis.
System
A method of fortification such as Polygonal system or Prussian System.
Table Lift
A n ammunition lift using a table with wheels that ran on vertical guide bars.It was powered by a winch and steel wire.
Tackle
A device of one of more blocks and a rope used to assist in the moving or lifting of ordnance.
Talus
The sloping section of a work.
Tampion
A wooden plug fitted in the muzzle end of a gun when not in use to prevent dirt and moisture from entering the barrel.
Tangent Scale
A device for measuring the angle of elevation of a gun.
Tangent Sight
A type of gun Sight.?
Tenaille
A low lying work built in a ditch to protect the curtain. Tenailles were located between bastions. It covers the Sally Port and can form a place of arms
Tenaille Trace System
A series of redans built at right angles to each other to form a zig-zag.
Tenaillon
A small irregular shapes work located on one side of a Redan.
Terreplein
A broad level on the rampart behind the parapet, wide enough to give room to work the guns , and allow passage of ammunition and gun carriages.
Territorial
Part time volunteer trained to take on a defence role in wartime. The y were formed i 1908 and became the Territorial Army in 1920.
Tete–de–Point
A fortification on the vulnerable side of a brid ge.
Thickness of a Parapet
The distance between the Exterior crest to the foot of the interior slope.
Throat
The interior opening of an embrasure.
Thumb Stall
A leather strap worn by the gunner who operat ed the vent to prevent prevent thumb injury.it had a cup for the thumb.
Time Fuze
A fuze in a shell or mine that sets it off after a pre-determined time.
Torpedo
This could be fired from a torpedo boat or from ashore. The latter was a guided type called ‘Brennan’.
Touch Hole
The place where a gun is fired by touching it with a lighted taper. It was the vent of a gun.
Tourelle
A small turret for a quick firing gun. Nordenfelt designed a disappearing version .
Trace
The horizontal plan of a fortress. A trace shows horizontal extent of the works various part s and its angles of fire. It can also refer to a plan of just the Magistal line of a work.
Trail
A field gun’s rear part that rests on the ground.
Training Arc
A graduated brass plate set into the casement floor next to the racers used for position finding.
Trajectory
The curving path taken by a projectile when fired.
Traveller
An overhead rail used to move shells.it consisted of two rails on which a four wheel truck ran with chain block attached.
Travelling Carriage
A gun carriage used for light rifled or movable armament. It was used for guns used in works created between forts or to supplement the ones on a parapet. They were designed to be deployed quickly with little preparation needed.
Traverse
To turn a gun to point at a target.
Or
An earth bank built to protect troops from enfilade f ire or reduce the effect of shell bursts. Traverse s were built across ramparts or terrepleins.
Traversing Gear
Equipment use to traverse an RML.
Traversing Platform
A metal or wooden platform which supports a gun and can be traversed on racer tracks. It is sometimes called a slide.
Traversing Rack
A cast iron toothed rack inserted into a casement floor to assist in traversing a heavy RMLs
Tray Lift
A lift used to raise shells and cartridges from the stores to the gun level. It consisted of trays attached to an endless chai n that ran over pulleys at the top and bottom. The chains were powered by winch and gearing attached to the lower pulleys.
Tread
The top surface of a Banquette on which soldiers will stand when firing their weapons.
Trench
An excavation for covering troops.
Tresidder’s Cartridge Store
A cartridge store built where overhead space was limited. It wonto low tunnel with a track on which a long truck ran. Th e cartridges were stored on the truck which could be moved by a winch and wire rope to align the cartridges to an issue chamber in the tunnel’s centre.
Trou–de–loup
An inverted cone shaped hole in the ground with pointed stakes is placed to slow down attackers.
Truck Lever
A handspike with a roller at one end.
Trucks
Wheels on which a gun platform or carriage sits.
Trunnion
The side pieces of a gun barrel that form a pivot in its carriage.
Tumbril
A two wheeled cart used by pioneers and miners to transport their tools.
Turret
A n armoured dome for mounting and protecting a gun.
Twydall Profile
A system of defence consisting of a firing step on an earth parapet with a ditch and unclimable fence in front.infantry were dispersed in difficult to see earthworks and the artillery hidden in mobile positions.Concrete open backed concrete casements provided shelter for the troops. The system was introduced in the 1870s at Chatham a nd was named after an area in the Town.
Twydall Redoubt
One of the redoubts of the Chatham defences which acted as infantry strong points.
Unclimbable Fence
A fence made of strong iron railings with horizontal bars at the top and bottom, and spikes riveted to the top of the railings. Unclimable fences were often used as a ditch defence.
Under–cover Loading
A gun emplacement layout that allowed the gun to be loaded without exposing its crew.
Vamure
A parapet built on the front edge of a rampart
Vasseur Mounting
A gun mounting that used a short steeply sloped slide.It ran on rollers around a central pivot , and used buffers to check the recoil. It was named after its designer.
Vent
A hole in the barrel of a gun into which gunpowder is poured or a tube fitted to fire the gun.To prevent corrosion by the powder a copper or wrought iron brushes were sometimes fitted in the hole.
Vent Plug
A wooden plug used to block the vent of a gun when not in use.
Vent Piece
A block of metal inserted into the top of a RBL gun to close the gun’s breach and chamber. It was fitted with the vent and held in position by a breac h screw.
Vertical Fire
Projectiles that fall at an angle greater than 45 degrees.
Volunteer
A part time trained soldier who can be called on.To serve when require d.
Wad
A pad used to hold a charge in a gun’s chamber, hold the shot , fill the fuse and filling holes in shells or reduce wear in the barrel.
Wadhook Worm
A side arm use to extract burnt material and wads from a gun. It had a hooked corkscrew metal end.
Wadmitilt
A woollen or cow hide placed on a magazine floor or wrapped around gunpowder barrelsto prevent damage to the barrels.
Wagon
A two or four wheeled horse drawn vehicle.
Watkins Position Finder
A device used to calculate the position of a target using telescope fitted to a plotting table. It was fitted with a transmitting system to pass the data . It was named after its inventor.
Wedge Gun
RBL guns that did not use a screw breach.
Wedge Wad
A wedge shaped pad inserted into the bore of an RML gun to hold the projectile in place. It was made of two wooden pieces joined by a piece of bent cane.
Whitworth Gun
A gun with a hexagonal spiral bore.
Windage
The space between the bore of a gun and its projectile which in a smooth bore gun caused inaccuracy.
Wire Guns
Breech loading guns made by coiling wire under tension on to a tube.
Woolwich Groove
A type of rifiled groove in which the edges are rounded to reduce the tendency of the edge of the groove to split.
Woolwich Infant
The large RML guns made at the Woolwich Arsenal.
Work
A general term for any defensive military construction.
Work
A spiral side arm used to extract material from a gu n bore.
Yoke Mounting
A mounting used in the Spithead Sea forts that allowed the gun to recoi l in the confined space of a casement. The mounting spread the lo ad between the floor and ceiling.
Zalinski Gun
A weapon that threw shells of high explosive by using compressed air. Its range was short but it made no noise or smoke. They were used in the USA but not adopted for use in Brirain, but one was tested.
A Handbook of Military Terms , David Moore, Palmerston Forts Society , 19z
The historic defences of Plmouth,Andrew Pye and Freddy Woodward, Exeter Archaeology, 1996
Artillery of the Napoleonic Wars , Kevin Kiley, 2015 , Frontline Books
American Artillerists Companion , Louis Dr Tousard, 1809, Conrad
Fortification , sir George Sydenham Clarke, 1907, reprint Beufor