The Bell FM-1 Airacuda
Bell aircraft were new to the scene in 1937 and had a futuristic look combined with unconventional features that hid the long list of flaws. While the Bell FM-1 Airacuda placement of engine and guns made it easier for the weapons to fire at bomber formations, the engine would overheat.
The rear propellors spelled death for any gunner that needed to bail out. To make things even worse, when you fired the guns, the gunner stations would get filled with smoke!