The K2Y Series of aircraft are the Japanese License built versions of the Avro 504N.
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.
Specifications
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
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).
Sources Japanese Aircraft, 1910-1941-Robert Mikesh & Shorzoe Abe The Mainichi Newspapers Co Ltd Yushukan War Memorial Museum Japanese Aircraft of the Pacific War-Rene Francillon, Japanese Aircraft-John Stroud, Japanese Military Aircraft Illustrated.
