Mitsubishi was the first and largest series producer of Japanese engines during World War II, with a 1937 Pratt & Whitney arrangement possibly contributing to this success. The Kasei (Mars) was the largest of the manufacturer’s original 14-cylinder radials, and was widely used in various models. It was geared, supercharged, and had optional water methanol injection. Between 1941 and 1945, 9,323 engines of all models of the Kasei 20 series were manufactured.
This Model 21 powered the Mitsubishi G4M twin engine attack bomber (Allied Code Name Betty) built in larger numbers than any other Japanese bomber; it was used from the beginning of the war and also transported the Japanese surrender delegation. A total of 2,446 G4M and the similar G6M1 aircraft were built.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
Circa World War II
Country of Origin
Japan
Type
PROPULSION-Reciprocating & Rotary
Manufacturer
Mitsubishi Jukogyo K. K.
Physical Description
Type: Reciprocating, 14 cylinders, 2 rows, radial, geared, supercharged, optional water methanol injection, air cooled
Power rating: 1,361 kW (1,825 hp) at 2,600 rpm
Displacement: 42.1 L (2,570 cu in.)
Bore and Stroke: 150 mm (5.91 in.) x 170 mm (6.69 in.)
Weight: 750 kg (1,654 lb)
Dimensions
Other: 175.3 × 134cm (69 × 52 3/4 in.)
Storage: 213.4 × 153 × 154.9cm (84 × 60 1/4 × 61 in.)
3-D (Weight on stand): 1009.7kg (2226lb.)
Length 175.3 cm (69 in.), Diameter 134 cm (52.75 in.)
Materials
Non-magnetic metal
Magnesium
Aluminum
Steel
Stainless Steel
Leather
Plastic
Adhesive
Rubber
Synthetic Fabric
Paper
Inventory Number
A19670116000
Credit Line
Transferred from Wright-Patterson AFB, Ohio
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
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