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Yokosuka R2Y
Role Reconnaissance, Fighter
Manufacturer Yokosuka
First flight 8 May 1945
Status Cancelled
Primary user Imperial Japanese Navy (intended)
Number built 2

The Yokosuka R2Y Keiun (景雲 - "Beautiful Cloud") was a prototype reconnaissance aircraft built in Japan late in World War II.

Design and development[]

Commissioned for the Imperial Japanese Navy after the R1Y design was cancelled due to its disappointing performance estimates, the R2Y borrowed from the German pre-war Heinkel He 119 in its use of coupled engines driving a single propeller. It also featured a tricycle undercarriage giving it an appearance similar to the Messerschmitt Me 509.

Completed in April 1945, the prototype made a short flight on 8 May, but was destroyed in a US air raid only a few days later, thus ending development.

A proposal was also made to develop the R2Y into a turbojet-powered light bomber by replacing its piston engines with two Ishikawajima Ne-330s. Designated the R2Y2 Keiun-Kai, the prototype was begun but never completed.

Specifications (R2Y1)[]

Data from Japanese Aircraft of the Pacific War[1]

General characteristics

  • Crew: 2
  • Length: 13.05 m (42 ft 10 in)
  • Wingspan: 14.00 m (45 ft 11 in)
  • Height: 4.24 m (13 ft 9 in)
  • Wing area: 34.0 m² (366 ft²)
  • Empty weight: 6,015 kg (13,261 lb)
  • Loaded weight: 8,100 kg (17,857 lb)
  • Max. takeoff weight: 9,400 kg (20,723 lb)
  • Powerplant: 1 × Aichi Ha-70 (Two 1,300 kW (1,700 hp) Aichi Atsuta engines coupled to a gearbox), 2,500 kW (3,400 hp)


  • Maximum speed: 770 km/h (416 kn, 480 mph)
  • Range: 3,610 km (1,949 nmi, 2,251 mi)
  • Service ceiling: 11,700 m (38,376 ft)
  • Rate of climb: 476 m/min (1,561 ft/min)
  • Wing loading: 238 kg/m² (49 lb/ft²)
  • Power/mass: 31 W/kg (0.19 hp/lb)

Related content[]

Related development:

Comparable aircraft:



  1. Francillon 1979, p. 475.
  • Francillon, Ph.D., René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1970 (2nd edition 1979). ISBN 0-370-30251-6.

External links[]

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