Yokosuka K4Y

Specifications

1st Flight 1930

Crew: 2

Length: 9.05 m (29 ft 8 in)

Wingspan: 10.90 m (35 ft 9 in)

Height: 3.51 m (11 ft 6 in)

Wing area: 29.5 m2 (318 sq ft)

Empty weight: 740 kg (1,631 lb)

Gross weight: 990 kg (2,183 lb)

Powerplant: 1 × Gasuden Jimpu 2 seven-cylinder air-cooled radial engine, 97 kW (130 hp)

Performance

Maximum speed: 163 km/h (101 mph, 88 kn) at sea level

Cruise speed: 93 km/h (58 mph, 50 kn)

Range: 310 km (200 mi, 170 nmi)

Endurance: 3 hours 30 min

Service ceiling: 3,460 m (11,350 ft)

Time to altitude: 29 min 20 sec to 3,000 m (9,800 ft)

Variants

211 K4Ys were built between 1933 and 1940.

Yokosuka built two prototypes, powered by 90 hp (67 kW) Hatakaze four-cylinder air-cooled inline engines in 1930, flying in 1930, and after successful testing, a version powered by a 130 hp Gasuden Jimpu radial engine was ordered into production as the Navy Type 90 Seaplane trainer, with the short designation K4Y1.

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