| Mark IX | |
|---|---|
 Mark IX | |
| Type | Armored personnel carrier |
| Place of origin | United Kingdom |
| Production history | |
| Designer | Lt. G.J. Rackham |
| Manufacturer | Marshall, Sons & Co. |
| No. built | 34 (total) |
| Specifications | |
| Mass | 27 tonnes (27 long tons; 30 short tons) |
| Length | 9.73 m (31 ft 11 in) |
| Width | 2.5 m (8 ft 2 in) |
| Height | 2.64 m (8 ft 8 in) |
| Crew | 4: 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/weight | 5.6 horsepower per tonne (4.2 kW/t) |
| Suspension | unsprung |
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).