Mark IX tank

Last updated

Mark IX
British Mark IX Armoured Personnel Carrier.jpg
Mark IX
Type Armored personnel carrier
Place of originUnited Kingdom
Production history
Designer Lt. G.J. Rackham
Manufacturer Marshall, Sons & Co.
No. built34 (total)
Specifications
Mass27 tonnes (27 long tons; 30 short tons)
Length9.73 m (31 ft 11 in)
Width2.5 m (8 ft 2 in)
Height2.64 m (8 ft 8 in)
Crew4: 1 commander, 1 driver, 1 mechanic, 1 machine gunner; up to 30 men could be carried.

Armour 10 mm
Main
armament
2 x 0.303 in (7.7 mm) machine guns
Secondary
armament
none, but loopholes for 16 soldiers
Engine Ricardo 6-cylinder petrol engine
150 brake horsepower (110 kW)
Power/weight5.6 horsepower per tonne (4.2 kW/t)
Suspensionunsprung
Operational
range
20 miles (32 km)
Maximum speed 6.9 km/h (4.29 mph)

The Mark IX tank was a British armoured fighting vehicle from the First World War. It was the world's first specialised armoured personnel carrier (APC).

Contents

Development

During the first actions with tanks, it became clear that infantry often could not keep up with the tanks; not because soldiers were too slow—the early tanks themselves could only move at a walking pace—but because soldiers on foot remained vulnerable to machine gun fire, though tanks had been invented to solve that problem. On many occasions, positions gained at great cost were immediately lost for lack of infantry to consolidate. It was thought this problem might be solved by cramming a few infantry soldiers into each tank, but the atmosphere inside was of such poor quality that the soldiers became ill and eventually lost consciousness. When exposed to fresh air again, the crew were incapacitated for about an hour while recovering from the noxious fumes inside the tank. They would be sick and suffer from severe headaches. [1]

In the summer of 1917, at the same time as another 'carrier' tank, the Gun Carrier Mark I, was under development, Lieutenant G.J. Rackham was ordered to design an armoured vehicle specifically for troop transport. He cooperated with Eustace Tennyson d'Eyncourt, the chairman of the Landships Committee. Design was complicated by a demand that the vehicle could be fitted with sponsons, converting it into a more modern battle tank than the Mark V tank, in case the Mark VIII tank design, proved a failure and the type was still designated as a tank, a 'Mark IX' to succeed the Mark VIII but that requirement was soon dropped due to its complexity. [2]

Prototype construction and production

In September 1917 Armstrong, Whitworth & Co. in Newcastle-upon-Tyne began constructing two prototypes of a pure transport vehicle that would become the Mark IX, which could also serve as a supply tank. The prototypes were approved the following year, at a time when it had become clear that a possible alternative, the stretched Mark V* tank, was unsuited for infantry transport. Two hundred Mark IXs were ordered from the tractor manufacturer Marshall, Sons & Co. of Gainsborough, Lincolnshire but by the end of the Great War only three had been finished, out of a total ultimate production run of thirty-four. [3] A specially-designed sledge developed by the tank workshop in France, that allowed an additional 10 long tons (10 t) of stores to be hauled, was tried.

Description

Internal arrangement of a Mark IX tank MarkIXTankLayout.jpg
Internal arrangement of a Mark IX tank

As there was no time for a completely new design, the Mark IX was based on the Mark V, with the hull lengthened to 9.73 m (31 ft 11 in). The 150 hp Ricardo engine was moved to the front, the gearbox to the back and the suspension girders left out entirely. This created an inner space 4 m (13 ft 1 in) long and 2.45 m (8 ft 0 in) wide, enough room for thirty (officially even fifty) soldiers or ten tons of cargo. To ensure sufficient stiffness for the chassis, the floor was reinforced by heavy transverse girders. The infantry inside had to contend with the control rods for the gears running along the roof and the drive shaft through the middle. Unfortunately for the infantrymen, no seats were built in for them in the tank. [4]

The crew proper consisted of a driver sitting on the left and a commander sitting to the right of him (the first time in a British tank making this concession to the prevailing traffic conditions in France), a mechanic, and a machine gunner who could man a gun in a hatch at the rear. A second machine gun was fitted in the front. Designed as an armoured personnel carrier, the type had elements of an infantry fighting vehicle, as along each side of the hull there were eight loopholes, through which the soldiers could fire their rifles. Four of the total of sixteen loopholes were in the four oval doors (two to each side) through which soldiers could embark and disembark. [4]

Despite the use of thinner—0.39 inches (10 mm)armour, the operational weight was still 27 long tons (27 t) and the speed only 4.3 mph (6.9 km/h). The tank could also carry supplies in a tray on the roof behind the commander's armoured observation turret (being the highest point at 8.7 feet (2.64 m)), while towing up to three loaded sledges. Rackham tried to improve internal conditions by putting a large silencer on the roof together with ventilation fans; but there was still no separate engine compartment and it is, therefore, questionable whether the project achieved the goal of a vehicle capable of delivering a squad of infantry in fighting condition, even given the severely limited operational range of the Mark IX.

Operational history and project

The Mark IX tank at The Tank Museum The Tank Museum (2012).jpg
The Mark IX tank at The Tank Museum

The Mark IXs were used for some years after the war. Pictures exist of vehicles carrying the designation "IC" painted on their hulls, probably indicating they were indeed used as "Infantry Carriers". [3] The type – named The Pig after the low front track silhouette that gave a snout-like appearance [4] – was used as the basis of two conversions: one of the first three built was used as an armoured ambulance, [3] while another was rebuilt as an amphibious tank by the staff of the test base at Dollis Hill. [5]

"The Duck" Amphibious Conversion

Mark IX Amphibious Conversion heading into Welsh Harp Reservoir Mark IX Amphibious Conversion heading into Welsh Harp Reservoir.jpg
Mark IX Amphibious Conversion heading into Welsh Harp Reservoir

Already a bulky vehicle — the probable reason the Mark IX was selected as the basis for an amphibious tank — its displacement was improved by fitting drums at the front and sides. Long wooden boards were attached to the track links but at one side of the board only; as they reached the curve of the track they would project, acting as paddles. Pictures were made of a floating tank in Hendon Reservoir on 11 November 1918, the day of the Armistice. According to oral tradition, this vehicle was named The Duck but there are doubts as to its veracity. The photographs show that a large rectangular superstructure had been placed around the cab and from this superstructure pipes projected upwards, likely the outlets of bilge pumps. The vehicle was for the occasion manned by Navy personnel. [5]

The last surviving Mark IX now resides at The Tank Museum, Bovington.

Notes

  1. Fletcher (2001) p. 155
  2. Fletcher (2001) p. 167
  3. 1 2 3 Fletcher (2001) p. 169
  4. 1 2 3 Fletcher (2001) p. 168
  5. 1 2 David Fletcher, 2001, The British Tanks 1915-19, The Crowood Press, p. 178

Related Research Articles

<span class="mw-page-title-main">Armoured fighting vehicle</span> Combat vehicle with both armament and armour

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).

<span class="mw-page-title-main">Infantry fighting vehicle</span> Type of armored personnel carrier with direct-fire support

An infantry fighting vehicle (IFV), also known as a mechanized infantry combat vehicle (MICV), is a type of armoured fighting vehicle used to carry infantry into battle and provide direct-fire support. The 1990 Treaty on Conventional Armed Forces in Europe defines an infantry fighting vehicle as "an armoured combat vehicle which is designed and equipped primarily to transport a combat infantry squad, and which is armed with an integral or organic cannon of at least 20 millimeters calibre and sometimes an antitank missile launcher". IFVs often serve both as the principal weapons system and as the mode of transport for a mechanized infantry unit.

<span class="mw-page-title-main">Matilda II</span> British Army tank of World War II

The Infantry Tank Mark II, best known as the Matilda, is a British infantry tank of the Second World War.

<span class="mw-page-title-main">Churchill tank</span> British heavy infantry tank

The Tank, Infantry, Mk IV (A22) Churchill was a British infantry tank used in the Second World War, best known for its heavy armour, large longitudinal chassis with all-around tracks with multiple bogies, its ability to climb steep slopes, and its use as the basis of many specialist vehicles. It was one of the heaviest Allied tanks of the war.

<span class="mw-page-title-main">Valentine tank</span> British infantry tank

The Tank, Infantry, Mk III, Valentine was an infantry tank produced in the United Kingdom during World War II. More than 8,000 of the type were produced in eleven marks, plus various specialised variants, accounting for approximately a quarter of wartime British tank production. The many variants included riveted and welded construction, petrol and diesel engines and a progressive increase in armament. It was supplied in large numbers to the USSR and built under licence in Canada. It was used extensively by the British in the North African campaign. Developed by Vickers, it proved to be both strong and reliable.

<span class="mw-page-title-main">Hobart's Funnies</span> Modified tanks first used in the Normandy Landings

Hobart's Funnies is the nickname given to a number of specialist armoured fighting vehicles derived from tanks operated during the Second World War by units of the 79th Armoured Division of the British Army or by specialists from the Royal Engineers.

<span class="mw-page-title-main">Universal Carrier</span> Armoured personnel carrier/weapon carrier

The Universal Carrier, also known as the Bren Gun Carrier and sometimes simply the Bren Carrier from the light machine gun armament, is a common name describing a family of light armoured tracked vehicles built by Vickers-Armstrongs and other companies.

<span class="mw-page-title-main">British heavy tanks of the First World War</span> Type of combat tank

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.

<span class="mw-page-title-main">DD tank</span> British WWII amphibious swimming tank

DD or duplex drive tanks, nicknamed "Donald Duck tanks", were a type of amphibious swimming tank developed by the British during the Second World War. The phrase is mostly used for the Duplex Drive variant of the M4 Sherman medium tank, that was used by the Western Allies during and after the Normandy Landings in June 1944.

<span class="mw-page-title-main">79th Armoured Division (United Kingdom)</span> Military unit

The 79th Armoured Division was a specialist armoured division of the British Army created during the Second World War. The division was created as part of the preparations for the Normandy invasion on 6 June 1944, D-Day.

<span class="mw-page-title-main">Ram tank</span> Canadian medium tank

The Tank, Cruiser, Ram was a cruiser tank designed and built by Canada in the Second World War, based on the U.S. M3 Medium tank chassis. Due to standardization on the American Sherman tank for frontline units, it was used exclusively for training purposes and was never used in combat as a gun tank. The chassis was used for several other combat roles however, such as a flamethrower tank, observation post and armoured personnel carrier.

<span class="mw-page-title-main">Gun Carrier Mark I</span> British self-propelled artillery

The Gun Carrier Mark I was a British vehicle of the First World War. The gun carrier was designed to transport a 6-inch howitzer or a 60-pounder gun forward soon after an attack to support infantry in advanced positions. Gun carriers were first used in the Battle of Pilckem Ridge during the Third Battle of Ypres. The carriers moved guns and equipment but were used for the rest of the war mainly for carrying equipment and supplies through areas under fire, where porters in the open would have suffered many casualties. The 6-inch howitzer could be fired while mounted, making the Gun Carrier Mark I the first modern self-propelled gun, a weapon capable of independent action and having tactical mobility on the battlefield.

<span class="mw-page-title-main">Kangaroo (armoured personnel carrier)</span> Armoured personnel carrier

A Kangaroo was a Canadian armoured personnel carrier (APC) during the Second World War which was created by converting a tank chassis. Kangaroos were created as an expedient measure "in the field" by the Canadian Army, and were so successful that they were used by other Commonwealth forces, including the British Army.

<span class="mw-page-title-main">Mark V tank</span> British WWI tank

The British Mark V tank was an upgraded version of the Mark IV tank.

<span class="mw-page-title-main">Nicholas Straussler</span>

Nicholas Peter Sorrel Straussler was an engineer mainly remembered for devising the flotation system used by Allied amphibious DD tanks during World War II. He also designed several armoured cars and tanks, including the 39M Csaba armoured car and the Straussler V-4 amphibious light tank. Born in Hungary, he developed a reputation as an innovative automotive engineer before becoming a British citizen during the interwar period. His work was mainly to do with amphibious, off-road and military vehicles.

<span class="mw-page-title-main">Amphibious warfare ship</span> Ship used in amphibious warfare

An amphibious warfare ship is an amphibious vehicle warship employed to land and support ground forces, such as marines, on enemy territory during an amphibious assault.

<span class="mw-page-title-main">Armoured personnel carrier</span> Transport vehicle for combat zones

An armoured personnel carrier (APC) is a broad type of armoured military vehicle designed to transport personnel and equipment in combat zones. Since World War I, APCs have become a very common piece of military equipment around the world.

<span class="mw-page-title-main">FV4401 Contentious</span> Air-portable tank destroyer

FV 4401 Contentious was a prototype British air-portable tank destroyer of the early 1960s. At least one prototype was constructed and tested, although no production vehicles were built or saw service.

<span class="mw-page-title-main">David Fletcher (military historian)</span> British military historian

David John Fletcher is an English author and military historian specialising in the history of armoured warfare, particularly that of the United Kingdom.

<span class="mw-page-title-main">Medium Mark D</span> Weapon

Medium Mark D was a British tank developed at the end of the First World War.

References