The Horten H.II Habicht (Hawk) was a German flying wing glider built in Germany in 1935. Four, including one flown mostly as a motorglider, were built. One of the gliders was used to test the aerodynamics of a prototype World War II Horten jet fighter-bomber. Design The Horten brothers' first glider, the H.I, was a true flying wing without any vertical surfaces or fuselage which had flown for seven hours at the 1934 Rhön competition on the Wasserkuppe. It had attracted much interest, gaining a DM600 "Construction Prize", but was hard to control and made only one competitive flight. The brothers "abandoned and burned it on the Wasserkuppe". In the next nine months, helped by the prize, they built the Horten H.II which had a wing of greater span and higher aspect ratio than the shallow delta of the Horten I, with sweep on the trailing edges as well. With improved yaw control it flew much better, though a test report from Hanna Reitsch made it clear that more work was required. The Habicht had a thick, reflex section wing, with a maximum thickness/chord ratio of 20% at the root and 10% near the tips. It had a quarter-chord sweep of 26°, 3° of dihedral and 7° of washout. It was in three parts with a central section, built on steel tubes, and two wooden outer panels. The latter had single spars and plywood covered leading edges, forming torsion-resisting D-boxes. In the absence of a conventional rudder the Habicht had drag rudders. These were leading edge flaps placed near the tips and formed by mounting the leading edge surfaces on a hinge so they could open upwards and downwards (those of the Horten H.I had extended downwards only). Their differential operational controlled yaw and they served as conventional airbrakes when opened together. The whole trailing edge was occupied by control surfaces; the outer panels had elevons outboard and landing flaps inboard and there were further landing flaps on the centre section. Rear control surfaces were assisted by Flettner servo tabs and were ply covered. The seat in the Habicht was strongly reclined and positioned the pilot entirely within the maximum thickness of the central wing profile. In place of a canopy the leading edge near the cockpit was covered on each side in transparent Cellon. The Habicht had tandem wheel landing gear; the forward wheel, fitted with a brake, was