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).

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.

In late 1917, after studying reports of previous tank actions, the British general staff agreed that the Tank Corps lacked a specialized supply model, which could also function as a tracked armored personnel carrier. This was the tank Mark IX, based one the long Mk.V* (star) for simplicity of design.

2020年6月13日 · The A.9 was the first British cruiser tank. It saw service during the early part of World War II in France and North Africa.

The IX was a derivative of the earlier Heavy Tanks designed by Britain but it lacked the characteristic weapon-mounting side sponsons of the earlier tanks. The tank had a single open compartment which housed the tank’s 4 man crew, forward mounted petrol engine (which gave a top speed of just over 4 mph), controls and gearing.

An experimental amphibious version of the Mark IX, fitted with long cylindrical air drums each side, was first tried out on the Welsh Harp at Hendon, near London, on Armistice Day, 1918. The nicely preserved Mk IX in the fine photos here can be seen in the splendid Tank Museum in Bovington, in the UK.

The Mark IX was a specially built to transport infantry tanks based on the Mark V * and can be regarded as the first troopship in the world.

Having a large tank capacity, the Mk 9 did not rely upon having extra water delivered from DP trucks, and its impressive jet throw from the monitor made it a powerful tool in fighting large aircraft fires quickly and effectively. The only down side came when crash crews were reduced in size following the introduction of the Mk 9. Chassis

The Mark IXs were used for some years after the war. Mark IX rebuilt as an amphibious tank by the staff of the test base at Dollis Hill. Its displacement was improved by fitting drums at the front and sides.

Having a large tank capacity, the Mk 9 did not rely upon having extra water delivered from DP trucks, and its impressive jet throw from the monitor made it a powerful tool in fighting large aircraft fires quickly and effectively. The only down side came when crash crews were reduced in size following the introduction of the Mk 9. Chassis