Nakajima Ki-49 (Helen) Army Type 100 Heavy Bomber (Donryu)
Built by Nakajima, designated the Type 100 Ki-49 Donryu (Storm Dragon). The Ki-49 was better armored, carried substantial defensive armament, and had self-sealing
fuel tanks. It was the first Army bomber with a manned tail position. This bomber was intended
as a replacement for the Ki-21
Sally, it fell short of performance expectations and served
During February 1942 the Donryu began its operational career with a series of high altitude
raids against Darwin.
The Ki-49-II model was at one point the most
widely used JAAF bomber, also used in transport and anti-submarine
and later kamikaze roles.
A total of 819 were built by Nakajima at Ota and Tachikawa.
Ki-49 Tail Turret - Did the Type 100 Heavy Bomber Really Have a Tail Turret? by Jim Long, 2002 revised June 2011