- Specifications Osprey I
- See also
- Notes
- References
| name=GP2 Osprey I | image=X-28 on ground.jpg | caption=X-28 }}{{Infobox Aircraft Type | type=Sport flying boat | national origin=United States | manufacturer=Homebuilt | designer=Eut Tileston | first flight=12 August 1970 | introduced= | retired= | status= | primary user= | number built= | developed from= | variants with their own articles=
}} |
The Osprey GP2 Osprey, also known as the Air Skimmer, Sea Skimmer, or Pereira GP2 Osprey, was a single-seat flying boat designed by Eut Tileston under contract to George Pereira, a private builder. After the release of Pereira's amphibious Osprey II some years later, this aircraft became known retrospectively as the Osprey I. The original plane was designed to be water launched only. Initial test flights were performed in the Sacramento Delta.[1] A single example was evaluated by the United States Navy as the X-28. Pereira formed Osprey Aircraft to market the plans to homebuilders, including plans for a trailer that allows the pilot to launch and recover the aircraft single-handed.[2] These plans are still marketed by Osprey Aircraft {{as of|2017|March|lc=y}}.[3][4] The Navy became interested in the project through a Naval Air Development Center study into patrol missions in Southeast Asia.[4] The study required that the aircraft be capable of flight under visual flight rules (VFR), be lightweight, cost less than 5,000 US dollars, and be able to be manufactured in Southeast Asia.[5] After examining Pereira's Osprey in 1971, the Navy purchased the aircraft and commenced testing it as the X-28A in the fall of that year.[6] Although the Osprey met most of the requirements of the program,[6] the program itself was cancelled without any further military examples produced.[4] The sole X-28 is now on display in the Kalamazoo Aviation History Museum.[4] Specifications Osprey I {{Aircraft specs
|ref=[1]
|prime units?=kts
|genhide=
|crew=1 Pilot
|capacity=
|length m=
|length ft=17
|length in=3
|length note=
|span m=
|span ft=23
|span in=
|span note=
|upper span m=
|upper span ft=
|upper span in=
|upper span note=
|mid span m=
|mid span ft=
|mid span in=
|mid span note=
|lower span m=
|lower span ft=
|lower span in=
|lower span note=
|swept m=
|swept ft=
|swept in=
|swept note=
|dia m=
|dia ft=
|dia in=
|dia note=
|width m=
|width ft=
|width in=
|width note=
|height m=
|height ft=5
|height in=3
|height note=
|wing area sqm=
|wing area sqft=97
|wing area note=
|swept area sqm=
|swept area sqft=
|swept area note=
|volume m3=
|volume ft3=
|volume note=
|aspect ratio=
|airfoil=
|empty weight kg=
|empty weight lb=600
|empty weight note=
|gross weight kg=
|gross weight lb=900
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=1560
|max takeoff weight note=
|fuel capacity=
|lift kg=
|lift lb=
|lift note=
|more general=
|eng1 number=1
|eng1 name=Continental C90
|eng1 type=
|eng1 kw=
|eng1 hp=90
|eng1 kn=
|eng1 lbf=
|eng1 note=
|power original=
|thrust original=
|eng1 kn-ab=
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|more power=
|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
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|rot number=
|rot dia m=
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|rot area sqft=
|rot area note=
|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|max speed note=
|max speed mach=
|cruise speed kmh=
|cruise speed mph=118
|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=
|minimum control speed kmh=
|minimum control speed mph=55
|minimum control speed kts=
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|range km=
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|ceiling m=
|ceiling ft=
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|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=2200
|climb rate note=
|time to altitude=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2
|wing loading lb/sqft=9.3
|wing loading note=
|disk loading kg/m2=
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|avionics=
}}
See also{{Portal|United States Air Force}}{{aircontent
|related=
|similar aircraft=
|lists=- List of experimental aircraft
|see also=
}}Notes1. ^1 {{cite journal|magazine=Sport Aviation|date=Nov 1970|title=Osprey I Flying Boat}}
2. ^Jane's All the World's Aircraft 1985–86, p. 606
3. ^http://ospreyaircraft.com/x28.htm
4. ^1 2 3 Osprey Aircraft website
5. ^Jenkins, Landis and Miller 2003, p. 36
6. ^1 Pima Air & Space Museum website
References{{commons category|X-28|Osprey Osprey I}}- {{cite book |title=Jane's All the World's Aircraft 1985–86 |publisher=Jane's Publishing |location=London}}
- {{cite book |last=Jenkins |first=Dennis R. |author2=Tony Landis |author3=Jay Miller |title=American X-Vehicles: An inventory—X-1 to X-50 |publisher=NASA |year=2003 |location=Washington D.C. |url=https://history.nasa.gov/monograph31.pdf}}
- {{cite journal |last= Miller |first=Jay |year= 1977 |title= USAF X-Series Aircraft (Part II) |journal= Aerophile |volume= 1 |issue= 2 |pages= 72–102 }}
- {{cite web |title=Pereira/Hummel Model 2 Osprey 2 |work=Pima Air & Space Museum website |url=http://www.pimaair.org/collection-detail.php?cid=221 |accessdate=2008-12-28 }}
- {{cite web |title=X-28 |work=Osprey Aircraft website |url=http://www.ospreyaircraft.com/x28.htm |accessdate=2008-12-28}}
{{Include-NASA}}{{Pereira aircraft}}{{X-planes}} 6 : United States sport aircraft 1970–1979|Flying boats|Osprey aircraft|Shoulder-wing aircraft|Single-engined pusher aircraft|Aircraft first flown in 1970 |