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. Between 1941 and 1945, 9,323 engines of all Kasei model series were manufactured.
The model Kasei 23, which used fan cooling and water-methanol injection, suffered from early destructive vibration at certain critical rotational speeds. This problem was eventually solved by improved engine mounting shock dampers and propeller modifications. It powered various models of the Mitsubishi J2M Raiden (Thunderbolt and Allied code name Jack), a single engine fighter aircraft that also suffered many development problems. A total of 476 J2M aircraft were built, and did perform well at the end of the war in defense of Japan.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Circa World War II
Japan
PROPULSION-Reciprocating & Rotary
Mitsubishi Jukogyo K. K.
Type: Reciprocating, 14 cylinders, 2 rows, radial, water-methanol injection, fan cooling
Power rating: 1,394 kW (1,870 hp)
Displacement: 42.1 L (2,570 cu in.)
Bore and Stroke: 150 mm (5.91 in.) x 170 mm (6.69 in.)
Weight: Not available
Diameter 134 cm (52.75 in.), Length 274.32 cm (108 in.)
Aluminum, Steel, Magnesium, Rubber, Cork, Paper, Brass, Bronze, Copper, Textile, Paint, Preservative coating
A19670097000
Found in the collection
National Air and Space Museum
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