The Arado E.581-4 was a German flying wing bomber project.
It had three landing gears, and an unusually low fuselage.
The aircraft was originally designed as the Arado E.555, and a scaled down version was designed in 1944, developing into this craft.
Production was never completed, however, as it was dropped in favour of maximising production of existing designs.
[1] General characteristics Performance Armament