Ente (Duck) This canard glider followed the design philosophy of the FVA-1 and FVA-2, with similar cantilevered wings and trousered undercarriage skids, but used a controllable foreplane for stability and control in the pitch and yaw axes. One built. FVA-4 Pipö The FVA-4 was a lightweight, low-powered two-seater aircraft to provide cheap reliable training capacity for the flying group students. FVA-5 Rheinland The last of Wolfgang Klemperers designs for the FVA was the FVA-5, built simultaneously with the 'FVA-4'. Introducing what was to become the normal layout for gliders into the 1960s with a high wing supported by struts and a fully enclosed cockpit inside the fuselage, at the wing leading edge. The FVA-5 was a high performance aircraft for its time, using lightweight materials pared down to achieve a low empty weight, resulting in a rather fragile aircraft requiring careful ground handling. One built. FVA-6 After the Allied Control Commission authorised the design and construction of powered aircraft, in 1924, Ilse Kober und Theodor Bienen designed the FVA-6, a tandem two-seater biplane with a 30hp () ABC Scorpion engine. Design and construction overcame many challenges. The first flight, at Düsseldorf-Lohausen airfield, ended in destruction for the FVA-6, the cause put down to inexperience on the part of the newly qualified test pilot. One built. FVA-7 M Ia It is uncertain which design was given the FVA-7 designation. The most probable candidate is the M 1a, derived from the Mayer M I by Hermann Mayer, a close associate of FVA. With resurgent interest in soaring the FVA set about building a new sailplane design, the 'FVA-7 m Ia', for training new pilots and to fly in Rhön contests at the Wasserkuppe. After Hermann Mayers success at the 1929 Rhön contest in the Mayer M I, the students at the FVA modified the design with a longer wingspan to improve performance, flying the 'FVA-7 M Ia' at the 1930 Rhön contest with qualified success. One built. FVA-8 MS II Based on the M Ia the 'FVA-8 MS II' had a 20m () span wing fitted to the original fuselage, and was also flown at the 1930 Rhön contest, in company with the 'FVA-7 M Ia'. One built. FVA-9 Blaue Maus II (Blue Mouse II) In 1933 the FVA students turned their attention to a lightweight soaring glider designed to have good aerodynamic, stability and control properties, as well as a high