The Schreder Airmate HP-11 is an American

mid-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

, V-tailed, single seat

glider Glider may refer to: Aircraft and transport Aircraft * Glider (aircraft), heavier-than-air aircraft primarily intended for unpowered flight ** Glider (sailplane), a rigid-winged glider aircraft with an undercarriage, used in the sport of glidin ...

Soaring Magazine ''SOARING'' is a magazine published monthly as a membership benefit of the Soaring Society of America. It was first published in 1937. The headquarters is in Hobbs, New Mexico. The magazine's article topics include safety issues and accounts of ind ...

'', page 19. Soaring Society of America, November 1983. USPS 499-920 Airmate was the name of Schreder's design company.

Design and development

The HP-11 (''HP'' stands for ''high performance'') was designed to compete in the

FAI Open Class Competition classes in gliding, as in other sports, mainly exist to ensure fairness in competition. However the classes have not been targeted at fostering technological development as in other sports. Instead classes have arisen because of: * t ...

in the 1962 US Nationals and represented the designer's continued pursuit of the perfect competition sailplane. The HP-11 is an all-metal design, with a wing that features a 26:1 aspect ratio, a wingspan and a NACA 65 (3)-618

airfoil An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. ...

, the same airfoil that had been used on the HP-8 and HP-10. A total of 42 HP-11s were built from kits and plans before production was ended in favour of the

Schreder HP-14 The HP-14 is a Richard Schreder-designed all-metal glider aircraft that was offered as a kit for homebuilding during the 1960s and 1970s. It was originally developed by retrofitting improved wings to the fuselage and tail of the HP-13, and f ...

Operational history

Flying the HP-11 in the 1962 US Nationals, Schreder came in third in the competition and had the longest flight, . Schreder also flew it to third place in the Open Class at the 1963 World Gliding Championships held at Junín, Buenos Aires Province,

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

. At that event Schreder flew a flight. In April 2011 there were 28 HP-11s registered with the US

Federal Aviation Administration The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic m ...

and three with

Transport Canada Transport Canada (french: Transports Canada) is the department within the Government of Canada responsible for developing regulations, policies and services of road, rail, marine and air transportation in Canada. It is part of the Transportati ...

Variants

;HP-11 :Initial model, with fixed monowheel landing gear. ;HP-11A :Improved model for amateur construction from plans or kits, with a retractable monowheel landing gear. ;

Bowlus BZ-1 The Bowlus BZ-1 is an American single seat FAI 15 Meter Class, V-tailed glider that was designed and built by Michael Bowlus.Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', page 7. Soaring Society of America November 1983. USPS 499 ...

:Version designed by Michael Bowlus with the front fuselage from a North American F-86 Sabre drop tank, the tail from an

HP-18 The HP-18 is a Richard Schreder-designed metal Racing Class sailplane that was offered as a kit for homebuilding during the 1970s and 1980s. Design and development The HP-18 is a flapped (15-meter) sailplane featuring a V-tail and 90-degree ...

and the wings from an HP-11. The wingspan was reduced to . ; Kohler Alpha :Version with a newly designed fuselage and HP-11 wings.

Aircraft on display

* National Soaring Museum - HP-11A * US Southwest Soaring Museum - HP-11 *

Chico Air Museum The Chico Air Museum is a nonprofit aviation museum located at the Chico Municipal Airport in Chico, California. Its mission statement is to "collect, preserve, document and display aircraft, and aviation and space artifacts. The museum’s primar ...

- HP-11A

Specifications

References

External links

Photo of an HP-11A
{{Schreder Sailplanes Schreder aircraft 1960s United States sailplanes Aircraft first flown in 1962 V-tail aircraft Shoulder-wing aircraft