Object Details

Manufacturer

Mitsubishi Jukogyo K. K.

Physical Description

Type: Reciprocating, 14 cylinders, 2-rows, radial, 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: 748.4 kg (1,650 lb)

Summary

The very large Mitsubishi organization was the first Japanese firm to mass produce high power aircraft engines, and it manufactured more of them (38 percent of Japan’s total) than any other Japanese company during World War II. Most of their better wartime engines evolved from models developed under license from Pratt & Whitney, Gnome-Rhone, Renault, Hispano-Suiza, and Armstrong Siddeley.

The Mitsubishi Kasei (Mars) was one of the most important 14-cylinder engines used to power Japanese navy aircraft. The 2-row radial Kasei 22 powered the Kawanishi H8K (Models 12, 22, and 32), a four-engine flying boat code-named “Emily” by the Allies. A total of 9,323 Kasei 20 series engines were built.

Credit Line

Transferred from the U.S. Navy Department

Circa1943

Inventory Number

A19480182000

Restrictions & Rights

Usage conditions apply

Type

PROPULSION-Reciprocating & Rotary

Materials

Steel, Aluminum, Brass, Rubber, Paint, Phonolic

Dimensions

Diameter 133.9 cm (52.7 in.)

Country of Origin

Japan

See more items in

National Air and Space Museum Collection

National Air and Space Museum

Record ID

nasm_A19480182000