An unditching beam is a device that is used to aid in the recovery of armoured fighting vehicles when they become bogged or "ditched". The device is a beam that is attached to the continuous tracks that provides additional traction for the vehicle to extricate itself from a ditch or from boggy conditions.
The unditching beam was first introduced into service during the First World War with the British Mark IV tank. [1] It is believed the device was designed by Philip Johnson who was serving as an engineering officer at the British Army's depot at Érin; originally the device weighed one-half long ton (0.51 t) and was constructed of a solid beam of oak with two large steel plates bolted to two sides to provide protection. [2] When not in use it was stowed on two rails mounted on the roof of the tank that ran the entire length of the vehicle, and when employed the beam was chained to the tank's tracks, giving the vehicle something firm to drive over. [2] [3]
Unditching beams remain a commonly carried standard ancillary on a number of Russian produced armoured fighting vehicles. [4]
An armoured fighting vehicle or armored fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured cars, assault guns, self-propelled artilleries, infantry fighting vehicles (IFV), and armoured personnel carriers (APC).
A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; their main armament is often mounted within a turret. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat.
The Infantry Tank Mark II, better known as the Matilda, is a British infantry tank of the Second World War.
The infantry tank was a tank concept developed by the United Kingdom and France in the years leading up to World War II. Infantry tanks were designed to support infantrymen in an attack. To achieve this, the vehicles were generally heavily armoured to allow them to operate in close concert with infantry even under heavy fire. The extra armour came at the expense of speed, which was not an issue when supporting relatively slow-moving foot soldiers.
The FV101 Scorpion is a British armoured reconnaissance vehicle and light tank. It was the lead vehicle and the fire support type in the Combat Vehicle Reconnaissance (Tracked), CVR(T), family of seven armoured vehicles. Manufactured by Alvis, it was introduced into service with the British Army in 1973 and was withdrawn in 1994. More than 3,000 were produced and used as a reconnaissance vehicle or a light tank.
The Cruiser tank Mk V or A13 Mk III Covenanter was a British cruiser tank of the Second World War. The Covenanter was the first cruiser tank design to be given a name. Designed by the London, Midland and Scottish Railway as a better-armoured replacement for the Cruiser Mark IV, it was ordered into production in 1939 before pilot models were built. Problems with the design became apparent only after production was under way.
British heavy tanks were a series of related armoured fighting vehicles developed by the UK during the First World War. The Mark I was the world's first tank, a tracked, armed, and armoured vehicle, to enter combat. The name "tank" was initially a code name to maintain secrecy and disguise its true purpose. The tank was developed in 1915 to break the stalemate of trench warfare. It could survive the machine gun and small-arms fire in "no man's land", travel over difficult terrain, crush barbed wire, and cross trenches to assault fortified enemy positions with powerful armament. Tanks also carried supplies and troops.
The Medium Mark B was a British medium tank of the First World War developed as a successor to the Whippet, but ultimately unsatisfactory and production was cancelled at the end of the war.
The Tank Museum is a collection of armoured fighting vehicles at Bovington Camp in Dorset, South West England. It is about 1 mile (1.6 km) north of the village of Wool and 12 miles (19 km) west of the major port of Poole. The collection traces the history of the tank. With almost 300 vehicles on exhibition from 26 countries it is the largest collection of tanks and the third largest collection of armoured vehicles in the world. It includes Tiger 131, the only working example of a German Tiger I tank, and a British First World War Mark I, the world's oldest surviving combat tank. It is the museum of the Royal Tank Regiment and the Royal Armoured Corps and is a registered charity.
The Lanchester armoured car was a British armoured car built on the chassis of the Lanchester "Sporting Forty", it saw wide service with the Royal Naval Air Service and British Army during the First World War. The Lanchester was the second most numerous World War I armoured car in British service after the Rolls-Royce armoured car.
The British Mark V tank was an upgraded version of the Mark IV tank.
The Type 63 is a Chinese armoured personnel carrier that entered service in the late 1960s. It was the first armoured vehicle designed in China without Soviet assistance. The design is simple and is comparable to other APCs of its time such as the M113.
Armoured Vehicle Royal Engineers (AVRE), also known as Assault Vehicle Royal Engineers, is the title given to a series of armoured military engineering vehicles operated by the Royal Engineers (RE) for the purpose of protecting engineers during frontline battlefield operations.
The Delaunay-Belleville armoured car was a British armoured car built on the chassis of the luxury French Delaunay-Belleville tourer. It saw service with the Royal Naval Air Service in the early years of the First World War.
The Seabrook armoured lorry was a British heavy armoured car built on the chassis of an American 5-ton truck which saw service with the Royal Naval Air Service during the First World War.
The Pierce-Arrow armoured lorry was a heavy armoured car mounting a QF 3-pounder Vickers gun, it was used by the Royal Naval Air Service during the First World War.
Christopher Frank Foss is a British military information author. Between 1970-2017, he worked for the military information publisher Jane's Information Group as editor of Janes Armour and Artillery, Jane’s Armoured Fighting Vehicles, Jane's AFV System Upgrades and co-editor of other Jane's editions such as Jane’s Artillery and Air Defence and Jane's Military Vehicles and Logistics. After stepping back in late 2017, Foss stayed on as a Consulting Editor with Janes for Jane's Defence Weekly and Jane's International Defence Review until late 2021. Since then he has continued writing articles for other military information publishers such as Shepard Media. During his career at Janes he was responsible for launching Jane’s Defence Review which later spun off into Jane's Soviet Intelligence Review and later Jane's Intelligence Review.
The Killen-Strait armoured tractor was an experimental armoured tractor constructed by the United Kingdom in 1915. The vehicle consisted of the superstructure from a Delaunay-Belleville armoured car, with the turret removed, fitted on a tractor produced by the American company Killen-Strait. A predecessor to the Little Willie, the vehicle is sometimes described as the first tracked armoured vehicle.