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At the end of 1944 the Dornier Project Office submitted to the F.HK Aircraft Committee in the RLM. their P 247/1 proposal for a single-seat Jagdbomber (fighter-bomber) and Zerstörer based on the Do 335. Povvered by a single Jumo 213T motor devcloping 2.600hp at take-off power with MW 50 injeetion and driving pusher propellers behind the cruciform lail surfaces via an extension shaft, il offered Ihe pilot a good forward view, especially for aiming the nose armament. By incorporating a knv wing with a 30° swepl leading edge. the ostimated maximum speed of over 875 km/h lay close to the 900km/h  limit - a speed that had not until then been attained by auy propeller- driven series-produced aircraft. The absence of the engine in the fuselage nose enabled three MK108 cannon to lx» housed there. The total 1,300 litres (286 gals) of fuel was held in a mix of protected and unprotected fuel tanks in the wings and fuselage. Cireular air intake duets for the engine radiator were located in the wing roots, the 3.9m  wide track undercarriage wheels liaving low-pressure tyres like the Do 335.
Because of the critical war situation, Ihis interesting project also did not progress beyond the drawing board. With it, a devel- opment ended in 1945 in which the reciprocaling engine had reached the maximum achievable. It was due to these superi) advances in German aircraft design in all realms of high-speed aerodynamics tliat paved the way for the entire world of aviation.