The second-mark variant of the Project Lambda bomber (P.101-5) was a proposal for a long-range aircraft for operational use for the Operation Downfall, an offensive against the Japanese. The design bureau converted one aircraft when the design was canceled before mass production could be started.

Development

Considering the structural capabilities and power of the bomber, the design bureau converted one Lambda bomber (44-19381; AA-381) that can hold up to 12 bombs (and an additional 2 in the bomb bay) and carry up to 12 rockets and an option to equip the Mark 2 Thin Man, the same payload of a medium bomber.

The 44-19381 mainly retained its fuselage and wing structure, heavily reinforced the inner wing section for armament, and installed a radar operator/remote gun controller or a navigator at the back portion of the wide fuselage.

Test flights would be commenced at October 1945, however after the Japanese surrender there was no need to produce more aircraft for the offensive and was retained at pre-flight test stage and the contract to build 300 aircraft was cancelled before the design bureau could build any.

Specifications

Crew: 2
Length:
Width:
Height:
Fuel capacity:
Powerplant: 3,000 hp. radial
Propeller: 4 bladed Curtiss Electric

Maximum speed: ~520 km/h TAS at 1,000 meters loaded
Cruise speed: ~380 km/h TAS at 1,000 meterd loaded
Stall speed:
Climb rate:
Range:
Service ceiling:

Armament
12x bombs
12x rockets