Type 87 Chi-I medium tank

Type 87 Chi-I medium tank
Experimental tank No.1 (Type 87 Chi-I), 1927
Place of origin	Empire of Japan
Production history
Designed	1925[1]
No. built	1
Specifications
Mass	20 metric tons (22 short tons)[2]
Length	6.03 m (19 ft 9 in)[3]
Width	2.40 m (7 ft 10 in)[3]
Height	2.78 m (9 ft 1 in) with cupola[3]
Crew	5[3]
Armor	6 to 17 mm (0.24–0.67 in)[3]
Main armament	57 mm Type 90 gun, 110 rounds[3]
Secondary armament	2 x 7.7 mm machine guns (hull, turret rear), 5,000 rounds[3]
Engine	Mitsubishi V-8-cylinder gasoline engine[3] 140 hp[3]
Suspension	parallelogram[3]
Operational range	170 km (110 mi)
Maximum speed	20 km/h (12 mph)[3]

The Type 87 Chi-I medium tank a/k/a Experimental tank No.1 (試製1 号戦車) was the first indigenously designed tank produced by Japan for the Imperial Japanese Army. Development of this medium tank began in June 1925 and was completed by February 1927. During the field trials, the tank proved to be too heavy and under-powered. The project was cancelled and a new light tank design was finished by April 1928 and designated the Type 89 I-Go.