T20 medium tank

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Medium tank T20
The T20 with horizontal volute spring suspension
Type	Medium tank
Production history
No. built	T20 - 2 pilot T22 - 2 pilot T23 - 248 [1]
Specifications
Mass	29.83 t (29.36 long tons; 32.88 short tons)
Length	5.70 m (18 ft 8 in)
Width	3.00 m (9 ft 10 in)
Height	2.44 m (8 ft 0 in)
Crew	5 (Commander, gunner, loader, driver, co-driver)
Armor	62 mm
Main armament	76 mm gun M1A1 70 rounds
Secondary armament	2x .30 cal Browning M1919 machine guns 6,000 rounds
Engine	GAN V-8 petrol
Power/weight	17.26/ton
Suspension	HVSS (Horizontal Volute Spring Suspension)
Operational range	160 km (99 mi)
Maximum speed	40 km/h (25 mph)

The medium tank T20, medium tank T22 and medium tank T23 were prototype medium tanks, developed by the United States Army during World War II. They were designed as successors to the M4 Sherman. The standard main weapon for production versions of these designs was to be the 76 mm gun M1.

In July 1943, on the basis that the 75 mm-armed M4 was becoming obsolete, the US Army Ordnance Department requested that the 76 mm-gunned T23E3 and T20E3 go into production as the M27 and M27B1. However, the request was rejected and neither design was ever mass-produced. The Army did not consider it necessary to interrupt M4 production for a vehicle for which they did not perceive a requirement and the introduction of the 76 mm gun to the tank force was opposed by the Armored Ground Force.

Successive evolution of the basic design culminated in the M26 Pershing.