Tachikawa KKY

The Tachikawa KKY, full name Tachikawa Army Small and Light Ambulance Aircraft was designed to rescue injured or sick patients from places without established airfields.

Following two earlier prototypes, 21 production examples were built between 1936 and 1940 and served in the Second Sino-Japanese War.



Two prototypes plus production aircraft from 1936 to October 1938.


The production aircraft from October 1938, powered by a 150 hp (110 kW) Gasuden Jimpu seven cylinder radial engine driving a wooden propeller.

It had increased area wings with Clark Y airfoils, braced with N-type interplane struts.

KS Small Survey Aircraft

A modification of the KKY-2 into a civil photographic survey aircraft for the Department of Railways.

It had additional large windows in the cabin sides behind the wing trailing edge and another in the cabin floor, a survey camera and seats for a survey crew of three.

Two were built in 1939.



One pilot


One medical attendant and two stretcher patients


7.9 m (25 ft 11 in)


10 m (32 ft 10 in)


2.38 m (7 ft 10 in)

Wing area

22 m2 (240 sq ft)

Empty weight

560 kg (1,235 lb)

Gross weight

977 kg (2,154 lb)


1 × Cirrus Hermes IV air-cooled four cylinder inverted inline, 89–97 kW (120–130 hp)


2-bladed fixed pitch, metal


Maximum speed

182 km/h (113 mph, 98 kn)

Cruise speed

156 km/h (97 mph, 84 kn)

Landing speed

80 km/h (50 mph; 43 kn)

Take-off and landing distances approximately

250 m (820 ft)


620 km (390 mi, 330 nmi)

Service ceiling

4,500 m (14,800 ft)

Time to altitude

14 min to 2,000 m (6,600 ft).



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