Do-335 - heavy German fighter, fighter-bomber of the Second World War, which is often mentioned in various sources Pfeil (Pfeil - it Arrow.). Do-335 «Pfeil» is the fastest piston aircraft in history. The aircraft had more than a revolutionary design, although such an arrangement using two tandem engines and is not entirely new. By the end of the won in Germany managed to collect a total of 37 of these aircraft, active participation in them did not take military actions.If it were possible to hold a competition for the most unusual aircraft designed during the Second World War, Dornier Do-335 «Pfeil» would have an excellent chance to take it one of the prizes. Unlike most of its competitors, which, despite the advanced design, did not have a significant military value, Do-335 was very successful combat aircraft. Do-335 «Pfeil» was one of the fastest piston engine fighters from throughout the history of aviation. If the German designers managed to solve all the technical problems that have dogged fighter at all stages of its development and to organize its serial production, then in the hands of the Luftwaffe would have been an exceptional car for its qualities that can effectively resist any aircraft allies. Therefore there is nothing strange in the fact that after the end of World War II, the Allies actively conducted tests have fallen into their hands Do-335 aircraft. But the rapid development of jet aircraft made quickly irrelevant Do-335 aircraft.The basis of this fighter design was based on the tandem engine layout, which Dornier patented in 1937. In accordance with the scheme of the famous German aircraft, in addition to the traditional front engine with tractor propeller behind the cockpit was located a second motor with an elongated shaft and a pusher propeller. Pusher propeller was out of tail.