GP2 Osprey I
X-28
Role	Sport flying boat
National origin	United States
Manufacturer	Homebuilt
Designed by	Eut Tileston
First flight	12 August 1970

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. 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.^[1] These plans are still marketed by Osprey Aircraft as of October 2009.^[2]

The Navy became interested in the project through a Naval Air Development Center study into patrol missions in Southeast Asia.^[2] The study required that the aircraft be capable of flight under visual flight rules (VFR), lightweight, cost fewer than 5,000 American dollars in quantity and be able to be manufactured in Southeast Asia.^[3] After examining Pereira's Osprey in 1971, the Navy purchased the aircraft and commenced testing is as the X-28A in the fall of that year.^[4] Although the Osprey met most of the requirements of the program,^[4] the program itself was cancelled without any further military examples produced.^[2] The sole X-28 is now on display in the Kalamazoo Aviation History Museum.^[2]

[edit] Specifications (X-28A)

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General characteristics

• Crew: 1
• Length: 17 ft 3 in (m)
• Wingspan: 23 ft 0 in (m)
• Height: 5 ft 3 in (m)
• Wing area: 97 ft² (m²)
• Empty weight: 600lb (kg)
• Loaded weight: 900lb (kg)
• Max takeoff weight: lb (kg)
• Powerplant: 1× Continental C-90-12 piston, 18,000 ft (5,500 m)

Performance

• Maximum speed: 135 mph (217 km/h)
• Range: 370 miles (595 km)
• Service ceiling: 18,000 ft (5,500 m)
• Rate of climb: ft/min (m/min)
• Wing loading: lb/m² (kg/ft²)

[edit] See also

Related lists

• List of experimental aircraft
  

[edit] Notes

[edit] References

• Jane's All the World's Aircraft 1985–86. London: Jane's Publishing. 
• Jenkins, Dennis R.; Tony Landis, and Jay Miller (2003). American X-Vehicles: An inventory—X-1 to X-50. Washington D.C.: NASA. http://history.nasa.gov/monograph31.pdf. 
• Miller, Jay (1977). "USAF X-Series Aircraft (Part II)". Aerophile 1 (2): 72–102. 
• "Pereira/Hummel Model 2 Osprey 2". Pima Air & Space Museum website. http://www.pimaair.org/collection-detail.php?cid=221. Retrieved 2008-12-28. 
• "X-28". Osprey Aircraft website. http://www.ospreyaircraft.com/x28.htm. Retrieved 2008-12-28. 

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