From 1937 Tachikawa produced a number of interesting designs which did not go into series production. The Tachikawa Ki-74 monoplane attracted official support. By 1941 the project had been confirmed as a long-range high-altitude bomber reconnaissance aircraft, and the first of the prototypes, powered by 1641kW turbocharged Ha-211-Ru radials, flew in March 1944.
Thirteen pre-production machines followed, powered by more reliable 1491kW Ha-104 Ru engines, giving a maximum speed of 570km/h at 8500m. They carried 1000kg of bombs and were defended by a single remotely-controlled 12.7mm machine-gun in the tail.
Although not used operationally, the Ki-74 received the Allied codename 'Patsy'.
Engines: 2 x Mitsubishi Ha-104-Ru, 1500kW
Max take-off weight: 19400 kg / 42770 lb
Empty weight: 10200 kg / 22487 lb
Wingspan: 27 m / 89 ft 7 in
Length: 17.65 m / 58 ft 11 in
Height: 5.1 m / 17 ft 9 in
Wing area: 80 sq.m / 861.11 sq ft
Max. speed: 570 km/h / 354 mph
Cruise speed: 400 km/h / 249 mph
Ceiling: 12000 m / 39350 ft
Range w/max.fuel: 8000 km / 4971 miles
Armament: 1 x 12.7mm machine-guns, 1000kg of bombs
Tachikawa Ki-74 PATSY