Prue UHP-1
{{short description|Glider designed by Irving Prue}}
{{Use mdy dates|date=January 2022}}
{{Use American English|date=January 2022}}
| {{Infobox aircraft begin
| name=UHP-1 | image= | caption= }}{{Infobox aircraft type | type=Glider | national origin=United States | manufacturer= | designer=Irving Prue | first flight=1967 | introduced=1967 | retired= | status= | primary user= | more users= | produced= 1966 and 1974 | number built=Two | developed from= | variants with their own articles= }} |
The Prue UHP-1 is an American high-wing, single-seat, T-tailed FAI Open Class glider that was designed by Irving Prue.{{Cite web|url = http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=373|title = UHP-1 Prue|accessdate = 18 June 2011|last = Activate Media|year = 2006|url-status = dead|archiveurl = https://archive.today/20130201224132/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=373|archivedate = 1 February 2013}}Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 57, Soaring Society of America November 1983. USPS 499-920{{Cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=UHP-1&PageNo=1|title = Make / Model Inquiry Results|accessdate = 18 June 2011|last = Federal Aviation Administration|authorlink = |date=June 2011}}
Design and development
The prototype Prue UHP-1 was constructed by Prue, completed in 1966 and first flown in 1967.
The prototype features a NACA 63-618, with an all-metal wing with doped aircraft fabric covering aft of the wing spar. This arrangement did not hold the correct airfoil shape at high speeds according to tests conducted. The fuselage is also of all-metal construction and features a fixed monowheel landing gear, coupled with a skid, a conventional T-tail and a drag chute. Aside from the drag chute, glide path control is via spoilers.{{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage|accessdate = 15 June 2011|last = Lednicer|first = David|authorlink = |year = 2010|archive-url = https://web.archive.org/web/20100420012244/http://www.ae.illinois.edu/m-selig/ads/aircraft.html|archive-date = 20 April 2010|url-status = dead}}
Two Prue UHP-1s were built, the second incorporating many changes to the design. Both aircraft were registered as Experimental - Amateur-builts.
Operational history
The second UHP-1 built was reported by the owner as having good handling characteristics and a lower minimum sink speed than a Schleicher ASW 17.
As of June 2011 both aircraft are still registered with the Federal Aviation Administration.
Variants
;UHP-1
:Initial prototype with fixed landing gear.
;UHP-1 Modified
:The second aircraft, built in 1974, which incorporates an all-metal wing to address the fabric issues on the first aircraft. It also has retractable monowheel landing gear, the nose and canopy from a Schempp-Hirth Open Cirrus, flaps, water ballast and a fully trimmable tailplane. The aircraft is officially registered with the FAA as a UHP-1 MODIFIED and has an empty weight that is more than {{convert|100|lb|kg|0|abbr=on}} heavier than the prototype.
Specifications (UHP-1 Modified)
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|aspect ratio=28.5:1
|airfoil=NACA 63-618
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|glide ratio=40 at {{convert|69|mph|km/h|0|abbr=on}}
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|sink rate ftmin=96
|sink rate note= at {{convert|49|mph|km/h|0|abbr=on}}
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|wing loading lb/sqft=7.8
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See also
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References
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{{Irving Prue aircraft}}
Category:1960s United States sailplanes