Medium Mark B

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Medium Tank Mark B
Medium Tank Mark B. The machine guns are missing from their mounts in the superstructure and in the projecting doors on the sides
Type	Medium tank
Place of origin	United Kingdom
Service history
Used by	United Kingdom Russian State Soviet Union
Wars	Russian Civil War Anglo-Irish War
Production history
No. built	102[1]
Specifications
Mass	18 tons[2]
Length	22 ft 9 in (6.9 m)
Width	8 ft 10 in (2.7 m)
Height	8 ft 6 in (2.6 m)
Crew	4:[2] commander, driver, mechanic, machine gunner
Armour	14 mm-6 mm [2]
Main armament	4 x .303 in (7.7 mm) Hotchkiss machine guns[2] to be placed in seven possible ball-mounts
Secondary armament	-
Engine	Ricardo 4-cylinder petrol 100 hp (75 kW)
Power/weight	5.6 hp/tonne
Suspension	unsprung
Operational range	105 km or 65 miles [2]
Maximum speed	6 mph (10 km/h)

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.