{{Short description|US single-seat glider, 1962}} {{Use mdy dates|date=January 2022}} {{Use American English|date=January 2022}} {{Redirect|HP-11|other uses|HP11 (disambiguation){{!}}HP11}} <!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{Infobox aircraft | name = HP-11 | logo = | logo_size = | image = File:CF-OIR (21351888458).jpg | alt = | caption = A Schreder HP-11 at the British Columbia Air Museum Victoria | long_caption = | other_names = | aircraft_type = Glider | aim = | outcome = | related = | national_origin = United States | manufacturer = | design_group = | designer = Richard Schreder | builder = | issuer = | status = Production completed | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 42 | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = 1962-66 | introduction = 1962 | retired = | first_flight = 1962 | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = Bowlus BZ-1<br />Kohler Alpha | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }} The '''Schreder Airmate HP-11''' is an American mid-wing, V-tailed, single seat glider designed by Richard Schreder.<ref name="SD">{{Cite web|url = http://www.sailplanedirectory.com/PlaneDetails.cfm?PlaneID=160|title = HP-11 Airmate HP Aircraft, LLC|accessdate = 12 April 2011|last = Activate Media|year = 2006|url-status = dead|archiveurl = https://web.archive.org/web/20110820205029/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=160|archivedate = 20 August 2011}}</ref><ref name="SoaringNov83">Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', page 19. Soaring Society of America, November 1983. USPS 499-920</ref> 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 in the 1962 US Nationals and represented the designer's continued pursuit of the perfect competition sailplane.<ref name="SD" /><ref name="SoaringNov83" />
The HP-11 is an all-metal design, with a wing that features a 26:1 aspect ratio, a {{convert|52|ft|m|1|abbr=on}} wingspan and a NACA 65 (3)-618 airfoil, the same airfoil that had been used on the HP-8 and HP-10.<ref name="SD" /><ref name="SoaringNov83" />
A total of 42 HP-11s were built from kits and plans before production was ended in favour of the Schreder HP-14.<ref name="SD" /><ref name="SoaringNov83" />
==Operational history== Flying the HP-11 in the 1962 US Nationals, Schreder came in third in the competition and had the longest flight, {{convert|469|mi|km|0|abbr=on}}. Schreder also flew it to third place in the Open Class at the 1963 World Gliding Championships held at Junín, Buenos Aires Province, Argentina. At that event Schreder flew a {{convert|382|mi|km|0|abbr=on}} flight.<ref name="SD" /><ref name="SoaringNov83" />
In April 2011 there were 28 HP-11s registered with the US Federal Aviation Administration and three with Transport Canada.<ref name="FAAReg">{{Cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=HP-11&PageNo=1|title = Make / Model Inquiry Results|accessdate = 12 April 2011|last = Federal Aviation Administration|authorlink = |date=April 2011}}</ref><ref name="TCCAR">{{Cite web|url = http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp|title = Canadian Civil Aircraft Register|accessdate = 12 April 2011|last = Transport Canada|date = April 2011|url-status = dead|archiveurl = https://web.archive.org/web/20110718042755/http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp|archivedate = 18 July 2011}}</ref>
==Variants== ;HP-11 :Initial model, with fixed monowheel landing gear.<ref name="SD" /><ref name="SoaringNov83" /> ;HP-11A :Improved model for amateur construction from plans or kits, with a retractable monowheel landing gear.<ref name="SD" /><ref name="SoaringNov83" /> ;Bowlus BZ-1 :Version designed by Michael Bowlus with the front fuselage from a North American F-86 Sabre drop tank, the tail from an HP-18 and the wings from an HP-11. The wingspan was reduced to {{convert|15|m|ft|1|abbr=on}}.<ref name="SD" /> ;Kohler Alpha :Version with a newly designed fuselage and HP-11 wings.<ref name="SD" />
==Aircraft on display== *National Soaring Museum - HP-11A<ref name="NSMCollection">{{cite web|url = http://www.soaringmuseum.org/collection.html|title = Sailplanes in Our Collection|accessdate = 26 February 2011|last = National Soaring Museum|year = 2011|url-status = dead|archiveurl = https://web.archive.org/web/20110516142717/http://www.soaringmuseum.org/collection.html|archivedate = 16 May 2011}}</ref> *US Southwest Soaring Museum - HP-11<ref name="SWSMCollection">{{cite web|url = http://swsoaringmuseum.org/collection.htm|title = Sailplanes, Hang Gliders & Motor Gliders|accessdate = 26 May 2011|last = US Southwest Soaring Museum|authorlink = |year = 2010|archive-date = November 20, 2022|archive-url = https://web.archive.org/web/20221120055021/http://swsoaringmuseum.org/collection.htm|url-status = dead}}</ref> *Chico Air Museum - HP-11A<ref name="Chico">{{cite web|url = http://www.chicoairmuseum.org/CAM_Aircraft_Slide_Show_in_pdf.pdf|title = Aircraft Displays of the Chico Air Museum 2012|access-date = 12 February 2020|author=Chico Air Museum|work =www.chicoairmuseum.org |year=2012|archiveurl = https://web.archive.org/web/20150322003128/http://www.chicoairmuseum.org/CAM_Aircraft_Slide_Show_in_pdf.pdf|archivedate =22 March 2015 }}</ref>
==Specifications== {{Aircraft specs |ref=Sailplane Directory and Soaring<ref name="SD" /><ref name="SoaringNov83" /> |prime units?=imp<!-- imp or kts first for US aircraft, and UK aircraft pre-metrification, met(ric) first for all others. You MUST choose a format, or no specifications will show --> <!-- General characteristics --> |genhide=
|crew=one |capacity= |length m= |length ft= |length in= |length note= |span m= |span ft=52 |span in=0 |span note= |height m= |height ft= |height in= |height note= |wing area sqm= |wing area sqft=104 |wing area note= |aspect ratio=26:1 |airfoil=NACA 65 (3)-618 |empty weight kg= |empty weight lb=400 |empty weight note= |gross weight kg= |gross weight lb=650 |gross weight note= |more general= <!-- Performance --> |perfhide=
|max speed kmh= |max speed mph= |max speed kts= |max speed note= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |g limits= |roll rate= |glide ratio=37:1 at 55 mph (89 km/h) |sink rate ms= |sink rate ftmin=108 |sink rate note=at 50 mph (80 km/h) |lift to drag= |wing loading kg/m2= |wing loading lb/sqft=6.25 |wing loading note= |more performance= |avionics= }}
==See also== {{aircontent <!-- include as many lines are appropriate. additional lines/entries with carriage return. --> |see also= * List of gliders |related=<!-- related developments --> |similar aircraft=<!-- similar or comparable aircraft --> |lists=<!-- related lists --> }}
==References== {{reflist}}
==External links== {{Commons category}} *[http://www.soaridaho.com/Schreder/HP-11/N678P/N678P.jpg Photo of an HP-11A] {{Schreder Sailplanes}}
Category:Schreder aircraft Category:1960s United States sailplanes Category:Aircraft first flown in 1962 Category:V-tail aircraft Category:Shoulder-wing aircraft