Yokosuka R2Y

Specifications

1st Flight 1945

Crew: 2 pilot and radio operator

Length: 13.04 m (42 ft 9 in)

Wingspan: 13.99 m (45 ft 11 in)

Height: 4.23 m (13 ft 11 in)

Wing area: 33.99 m2 (365.9 sq ft)

Empty weight: 6,015 kg (13,261 lb)

Gross weight: 8,100 kg (17,857 lb)

Max takeoff weight: 9,400 kg (20,723 lb)

Fuel capacity: 1,555 l (411 US gal; 342 imp gal)

Powerplant: 1 × Aichi Ha-70 (unified) 24-cylinder liquid-cooled coupled V-12 piston engines, 2,500 kW (3,400 hp) for take-off

2,312 kW (3,100 hp) at 3,000 m (9,843 ft)

Propellers: 6-bladed constant-speed metal propeller

Performance

Maximum speed: 718.5 km/h (446.5 mph, 388.0 kn) at 10,000 m (32,808 ft)

Cruise speed: 463 km/h (288 mph, 250 kn) at 4,000 m (13,123 ft)

Landing speed: 166 km/h (103 mph; 90 kn)

Range: 3,139 km (1,950 mi, 1,695 nmi)

Ferry range: 3,611 km (2,244 mi, 1,950 nmi)

Service ceiling: 11,700 m (38,400 ft)

Time to altitude: 10,000 m (32,808 ft) in 21 minutes

Wing loading: 238.26 kg/m2 (48.80 lb/sq ft)

Power/mass: 0.3161 kW/kg (0.1923 hp/lb)

Variants

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 Mitsubishi Ne-330s.

Designated the R2Y2 Keiun Kai, it did not enter construction before the end of the war.

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