Schreder Airmate HP-8

{{Short description|American glider}} {{Use mdy dates|date=May 2022}} {{Use American English|date=May 2022}} {{Redirect|HP-8|other uses|HP8 (disambiguation){{!}}HP8}}  {{Infobox aircraft | name = HP-8 | logo = | logo_size = | image = File:Moffat lands HP-8 sailplane.jpg | alt = | caption = George B. Moffat, Jr. lands his HP-8 sailplane at Harris Hill, NY in July, 1963 at the 30th US National Soaring Championships. | long_caption = | other_names = | aircraft_type = Glider | aim = | outcome = | related = | national_origin = United States | manufacturer = | design_group = | designer = Richard Schreder | builder = | issuer = | status = sole example in the National Soaring Museum | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = One | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = 1958 | introduction = 1958 | retired = | first_flight = 1958 | initiated = | in_service = | last_flight = | expected = | developed_from = Schreder HP-7 | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }} The '''Schreder Airmate HP-8''' is an American, high-wing single seat glider that was designed by Richard Schreder after the loss of the HP-7 in 1957.<ref name="SD">{{Cite web|url = http://www.sailplanedirectory.com/PlaneDetails.cfm?PlaneID=167|title = HP-8 Airmate HP Aircraft, LLC|accessdate = 8 April 2011|last = Activate Media|authorlink = |year = 2006|url-status=dead|archiveurl = https://web.archive.org/web/20020502111217/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=167|archivedate = 2 May 2002}}</ref><ref name="SoaringNov83">{{cite journal|last=Said|first=Bob|title=1983 Sailplane Directory|journal=Soaring Magazine|date=November 1983|pages=18|publisher=Soaring Society of America}}</ref>

Airmate was the name of Schreder's design company.

==Design and development== The HP-8 was designed as a result of the lessons learned in flying the HP-7 in the 1957 US Nationals. The HP-7 was destroyed in an aero-towing accident shortly after the Nationals and Schreder decided to improve on the earlier design with the HP-8. As in all of Schreder's designs, the ''HP'' stands for "high performance".<ref name="SD" /><ref name="SoaringNov83" />

The HP-8 is an all-metal design with a very high aspect ratio wing of 24:1, that incorporates a NACA 65 (3)-618 airfoil. The wing is of only 110 square feet (10 m2) in area and this gives a high wing loading of 7.53 lbs/sq ft (36.8 kg/m2), allowing a high glide ratio at a high speed.<ref name="SD" /><ref name="SoaringNov83" />

==Operational history==

The HP-8 was entered by Schreder in the 1958 US Nationals and placed first. Schreder set records with the aircraft in all three speed categories in 1959 and also flew it to first place in the 1960 US Nationals.<ref name="SD" /><ref name="SoaringNov83" />

The sole example built was then sold to George B. Moffat, Jr. who raised the speed records that Schreder had set in the aircraft. The HP-8 was subsequently purchased by Fred Hefty and John Elizalde and donated to the National Soaring Museum.<ref name="SD" /><ref name="SoaringNov83" />

==Aircraft on display== *National Soaring Museum - 1. Currently listed as "under restoration"<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|authorlink = |year = 2011|url-status=dead|archiveurl = https://web.archive.org/web/20110516142717/http://www.soaringmuseum.org/collection.html|archivedate = 16 May 2011}}</ref>

==Specifications (HP-8) == {{Aircraft specs |ref=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II<ref name=Shenstone>{{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II|year=1963|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=222–223|edition=1st|author2=K.G. Wilkinson |language=English, French, German}}</ref> |prime units?=imp  |genhide= |crew=one |capacity= |length m=6.36 |length ft= |length in= |length note= |span m=15.65 |span ft=51 |span in=3 |span note= |height m= |height ft= |height in= |height note= |wing area sqm=10.25 |wing area sqft= |wing area note= |aspect ratio=23.8:1 |airfoil=NACA 653618 |empty weight kg=259 |empty weight lb= |empty weight note= |gross weight kg=386 |gross weight lb= |gross weight note= |more general=  |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=218 |never exceed speed mph= |never exceed speed kts= |never exceed speed note= *'''Rough air speed max:''' {{convert|120.5|mph|km/h kn|abbr=on|0}} *'''Aerotow speed:''' {{convert|120.5|mph|km/h kn|abbr=on|0}} *'''Winch launch speed:''' {{convert|75|mph|km/h kn|abbr=on}} *'''Terminal velocity:''' with full airbrakes {{convert|125.5|mph|km/h kn|abbr=on|0}} |g limits=12 |roll rate= |glide ratio=36:1 at {{convert|55|mph|km/h kn|abbr=on}} |sink rate ms=0.64 |sink rate ftmin= |sink rate note= at {{convert|50|mph|km/h kn|abbr=on}} |lift to drag= |wing loading kg/m2=37.6 |wing loading lb/sqft=7.53 |wing loading note= |more performance= |avionics= }}

==See also== {{aircontent  |see also=

|related= |similar aircraft= |lists= * List of gliders }}

==Notes== {{reflist}}

==References== {{Commons category|Schreder HP-8}} *{{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II|year=1963|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=222–223|edition=1st|author2=K.G. Wilkinson |language=English, French, German}} *{{Cite web|url = http://www.sailplanedirectory.com/PlaneDetails.cfm?PlaneID=167|title = HP-8 Airmate HP Aircraft, LLC|accessdate = 8 April 2011|last = Activate Media|authorlink = |year = 2006|url-status=dead|archiveurl = https://web.archive.org/web/20020502111217/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=167|archivedate = 2 May 2002}} *{{cite journal|last=Said|first=Bob|title=1983 Sailplane Directory|journal=Soaring Magazine|date=November 1983|pages=18|publisher=Soaring Society of America}} *{{cite web|url = http://www.soaringmuseum.org/collection.html|title = Sailplanes in Our Collection|accessdate = 26 February 2011|last = National Soaring Museum|authorlink = |year = 2011|url-status=dead|archiveurl = https://web.archive.org/web/20110516142717/http://www.soaringmuseum.org/collection.html|archivedate = 16 May 2011}}  {{Schreder Sailplanes}}

Category:Schreder aircraft Category:1950s United States sailplanes Category:Aircraft first flown in 1958 Category:V-tail aircraft