Object Details
Manufacturer
Mitsubishi Jukogyo K. K.
Physical Description
Type: Reciprocating, 14 cylinders, 2 rows, radial, air cooled
Power rating: 1,141 kW (1,530 hp) at 2,450 rpm
Displacement: 42.1 L (2,570 cu in.)
Bore and Stroke: 150 mm (5.91 in.) x 10 mm (6.69 in.)
Weight: 725 kg (1,598 lb)
Summary
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, a total of 9,323 engines of all models of 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.
Credit Line
Transferred from the U.S. Navy
Date
Circa World War II
Inventory Number
A19710894000
Restrictions & Rights
Usage conditions apply
Type
PROPULSION-Reciprocating & Rotary
Materials
Steel
Aluminum
Magnesium Alloy
Copper Alloy
Paint
Leather
Plastic
Ceramic
Phenolic Resin
Dimensions
Length 177.8 cm (70 in.), Width 127 cm (50 in.), Height 127 cm (50 in.)
Country of Origin
Japan
See more items in
National Air and Space Museum Collection
Data Source
National Air and Space Museum
Link to Original Record
Record ID
nasm_A19710894000