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Tachikawa Ki-74

The Tachikawa Ki-74 was a Japanese experimental long-range reconnaissance bomber of World War II.

A twin-engine, mid-wing monoplane, it was developed for the Imperial Japanese Army Air Service but never deployed in combat.

The Ki-74 was designed for high altitude operation with a pressurized cabin for its crew.

16 aircraft were built.

Though already conceived in 1939 as a long-range reconnaissance aircraft capable of reaching west of Lake Baikal when operating from bases in Manchukuo (Manchuria), the initial prototype Ki-74 only first flew as late as March 1944, after its development and primary mission requirement had been changed to capability of bombing and reconnaissance over the mainland United States.

The aircraft was powered by two 1,641 kW (2,201 hp) Mitsubishi Ha-211-I [Ha-43-I] radial engines.

The subsequent two prototypes were powered by the turbo-supercharged Mitsubishi Ha-211-I Ru [Ha-43-II]; these experienced teething troubles and the following thirteen pre-production machines substituted the Ha-211 Ru engine for the lower-powered but more reliable turbo-supercharged Mitsubishi Ha-104 Ru (Army Type 4 1,900 hp Air Cooled Radial).

The aircraft was fitted with self-sealing fuel tanks, armour and a pressurized cabin for its crew of 5.





9,200 kg (20,300 lb)


17.65 m (57 ft 11 in)


18.6 m (61 ft 0 in)


5.1 m (16 ft 9 in)

Wing area

80 m2 (860 sq ft)

Empty weight

10,200 kg (22,487 lb)

Gross weight

19,400 kg (42,770 lb)


2 × Mitsubishi Ha104 Ru turbo-supercharged 18-cylinder air-cooled radial piston engines,

1,500 kW (2,000 hp) each


Maximum speed

570 km/h (350 mph, 310 kn)

Cruise speed

400 km/h (250 mph, 220 kn)


8,000 km (5,000 mi, 4,300 nmi)

Service ceiling

12,000 m (39,000 ft)

Wing loading

242.5 kg/m2 (49.7 lb/sq ft)


0.154 kW/kg (0.093 hp/lb; 0.206 hp/kg)


1 x 12.7 mm (0.500 in) Ho-103 machine gun

1,000 kg (2,200 lb) bomb load.



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