Yokosuka K2Y1 / K2Y2

Specifications

1st Flight 1913

Crew: 2

Length: 29 ft 5 in (8.97 m)

Wingspan: 36 ft 0 in (10.97 m)

Height: 10 ft 5 in (3.18 m)

Wing area: 330 sq ft (31 m2)

Empty weight: 1,231 lb (558 kg)

Gross weight: 1,829 lb (830 kg)

Fuel capacity: 25.5 imp gal (31 US gal; 116 l) fuel ; 6 imp gal (7 US gal; 27 l) castor oil

Powerplant: 1 × 160 hp (120 kW) Gasuden Jimpu 2 radial piston engine

Propellers: 2-bladed Avro fixed-pitch wooden propeller, 9 ft 0 in (2.74 m) diameter 8 ft 8 in (2.6 m) pitch

Performance

Maximum speed: 95 mph (153 km/h, 83 kn) at sea level

87 mph (76 kn; 140 km/h) at 8,000 ft (2,438 m)

85 mph (74 kn; 137 km/h) at 10,000 ft (3,048 m)

Cruise speed: 74 mph (119 km/h, 64 kn) at 75% power at 8,000 ft (2,438 m)

71 mph (62 kn; 114 km/h) at 75% power at 10,000 ft (3,048 m)

Stall speed: 40 mph (64 km/h, 35 kn)

Range: 250 mi (400 km, 220 nmi)

Endurance:

2 hours at sea level at maximum speed

2 hours 8 minutes at 8,000 ft (2,438 m) at maximum speed

3 hours at 10,000 ft (3,048 m) at maximum speed

3 hours 42 minutes at 8,000 ft (2,438 m) at cruise speed

4 hours 15 minutes at 10,000 ft (3,048 m) at cruise speed

Service ceiling: 16,000 ft (4,900 m)

Rate of climb: 700 ft/min (3.6 m/s)

Time to altitude:

3,500 ft (1,067 m) in 5 minutes

8,000 ft (2,438 m) in 10 minutes

10,000 ft (3,048 m) in 16 minutes

Wing loading: 5.54 lb/sq ft (27.0 kg/m2)

Power/mass: 0.06 hp/lb (0.099 kW/kg)

Armament

1 fixed .303 Lewis atop upper wing (single-seat night fighter variants)

Variants

Yokosuka K2Y1 – Japanese version of the Avro 504N, given the long designation Yokosuka Navy Type 3 Primary Trainer, powered by a 130 hp (97 kW) Mitsubishi-built Armstrong Siddeley Mongoose radial piston engine, 104 built.

Yokosuka K2Y2 – Improved version of the K2Y1, powered by a 160 hp (120 kW) Gasuden Jimpu 2 radial piston engine. 360 built (K2Y1 and K2Y2).

Watanabe built aircraft were given the long designation Watanabe Navy Type 3-2 Land-based Primary Trainer.

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