HP Aircraft HP-11 Airmate
The all metal HP-11 was produced in 1962 in time for the 1962 U.S. Nationals, in which Schreder placed third and made the longest flight, 754.8 km/ 469 miles; he later placed third in the Open Class at the 1963 World Championship at Junin, Argentina.
The HP11A, an improved version, has a retractable wheel. Some significant modifications were made in a number of the kit-built HP-11s including, for example, the Kohler Alpha which mated a new fuselage on to the wings of an HP-11. Michael Bowlus used the tail of an HP-18 and the wings of an HP-11, reduced to 15 m., to develop his BZ-1, which first flew in 1984.
One of America's sailplane designers and pilots is Richard E. Schreder who built the HP-10, and the HP-11 and HP-11 A competition single-seaters, the HP-11 being placed third in the 1963 World Championships, and the Standard Class HP-12 derived from the HP-11.
The HP-11, HP-11 A and HP-12 were built by Airmate at Toledo, Ohio-a company formed by Richard E. Schreder.
Bryan Aircraft Inc of Bryan, Ohio, also produced plans of the HP-11 A for homebuilders.
One HP-11 belongs to the National Soaring Museum.
Wing span: 15.85m / 52ft
Wing area: 9.66sq.m / 104sq.ft
Empty Weight: 181kg / 400lb
Payload: 113kg / 250lb
Gross Weight: 294kg / 650lb
Wing Load: 30.43kg/sq.m / 6.25lb/sq.ft
Water Ballast: 0
Aspect ratio: 26
Airfoil: NACA 65 (3)-618
L/DMax: 37 89 kph/ 48 kt / 55 mph
MinSink: 0.55 m/s / 1.8 fps / 1.07 kt
No. Built: 42