| 词条 | Schreder HP-20 | |||||||||||||||||||
| 释义 |
The Schreder HP-20 is an American, high-wing, T-tail, single seat glider designed by Richard Schreder.[1] Design and developmentThe HP-20 was designed by Schreder for the FAI 15 Metre Class. The HP-20 prototype was just complete when Schreder lost interest in the project and moved on to work on the HP-21 instead. The sole example of the HP-20 was built by Schreder in his workshop in Byran, Ohio and first flew in 1981.[1][2] The HP-20 is all-metal with foam wing ribs. The design shares a similar fuselage to the HP-19, but has a different double-tapered wing of smaller area, {{convert|102|sqft|m2|abbr=on}} versus {{convert|113|sqft|m2|abbr=on}} for the HP-19. This gives the HP-20 a higher wing loading and higher best glide speed, although the glide ratio is the same as the HP-19 at 42:1. The airfoil is a Schreder modification of a Wortmann section, designated as Schreder 3. {{convert|200|lb|kg|0|abbr=on}} of water ballast can be carried. The landing gear is a retractable monowheel.[1] Operational historyEven though Richard Schreder died in August 2002, in April 2011 the sole HP-20 was still registered to him.[2] Specifications (HP-20){{Aircraft specs|ref=Soaring[1] |prime units?=imp
See also{{aircontent|see also=
|related= |similar aircraft= |lists= }} References1. ^1 2 3 Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 24. Soaring Society of America, November 1983. USPS 499-920 {{Schreder Sailplanes}}2. ^1 {{Cite web|url =http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=4240F|title = Make / Model Inquiry Results|accessdate = 19 April 2011|last = Federal Aviation Administration|authorlink = |date=April 2011}} 2 : United States sailplanes 1980–1989|Schreder aircraft |
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