The above image represents-Nakajima Ki-49 or Helen" bomber by Japanese.
The Nakajima Ki-49 was intended to replace the
Ki-21 and was designed in 1938.The Ki-49 was designed to an Army specification of 1938 as a replacement for the Mitsubishi Ki-21 'Sally' twin-engined bomber - but it was initially only slightly faster than the Ki-21, had a poor ceiling and never achieved a significant advance in range or offensive weapons load, although it was the first Japanese bomber to carry a 20mm cannon as part of its standard defensive armament. The 1,160 hp Ha-5B engines of the prototype were replaced by the Ha-21 to produce the Ki-49-I model. 129 were built at Ohta, after whose Donryu (dragon swallower) shrine the aircraft was named. The production machine was designated by the Army the 'Type 100' heavy bomber, and given the reporting-name
'Helen' by the Allies