Mitsubishi Ha 43 Model 11 (Ha 211 Ru), Radial 18 Engine


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This Japanese engine incorporated fuel injection, fan cooling, and turbo-supercharging. Mitsubishi began development in 1941, and 16 engines were known to have been built during World War II. The engine powered several prototype aircraft including the: Mitsubishi Ki-83 Army Experimental Long-range Fighter; Tachikawa Ki-70 Army Experimental Command Reconnaissance Plane(Allied Code Name Clara); Tachikawa Ki-74 Army Experimental Long Range Bomber(Allied Code Name Patsy); Mitsubishi A7M3-J Navy Experimental 17-Shi Ko (A) Type Carrier Fighter Reppu (Allied Code Name Sam). None became operational, and the engines, which were not fully developed, proved unreliable during flight tests.

The Tachikawa Ki-70 was intended as a reconnaissance aircraft, but its performance fell below that of advanced versions of its predecessor, being overweight and the Ha-211 engine being unreliable. The Tachikawa Ki-74 was to be capable of bombing the United States mainland. However, the unreliable Ha-211 engines suffered from development problems, and the war ended before replacement engines could be tested.

Collection Item Long Description:

Data Source

National Air and Space Museum

Credit Line

Transferred from the U.S. Army Air Forces


Diameter 123.0 cm (48.4 in.), Length 202.0 cm (79.5in.)

Country of Origin



Circa World War II

Physical Description

  • Type: Reciprocating, 18 cylinders, 2 rows, radial, air-cooled, turbosupercharged
  • Power rating: 1,641 kW (2,200 hp) at 2,900 rpm
  • Displacement: 41.7 L (2,546 cu in.)
  • Bore and Stroke: 140 mm (5.5 in.) x 150 mm (5.9 in.)
  • Weight: 980 kg (2,161 lb)


PROPULSION-Reciprocating & Rotary

Inventory Number