Osprey Aircraft GP-4

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Osprey Aircraft GP-4.jpg
Role Experimental Aircraft
National origin United States
Manufacturer Osprey Aircraft
Designer George Pereira
First flight 1984
Introduction 1984
Status Plans available

The GP-4 is an experimental aircraft designed to fly cross country with two passengers 1,200 nmi (2,222 km) at 240 mph (386 km/h).[1] Aircraft Spruce & Specialty Co has the rights to distribute the kits for the aircraft, while the plans are distributed by Osprey Aircraft.[2][3][4]

Osprey Aircraft GP-4

Design and development[edit]

The GP-4 is the fourth aircraft from designer George Pereira, It is a low wing side-by-side retractable gear aircraft of wood construction. It has a single spar stressed to +8 to -6G loading.[2][5]

The aircraft's wooden construction is labor-intensive and an estimated 3000–4000 hours are required to construct it.[2]

Operational history[edit]

In 1984 The GP-4 won the Grand Champion Custom Built and the Outstanding New Design awards at the Experimental Aircraft Association Airventure airshow in Oshkosh, Wisconsin.[citation needed]

Specifications GP-4[edit]

Data from Osprey[6]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 21 ft 6 in (6.55 m)
  • Wingspan: 24 ft (7.3 m)
  • Wing area: 104 sq ft (9.7 m2)
  • Airfoil: Laminar 63 Series
  • Empty weight: 1,260 lb (572 kg)
  • Gross weight: 2,000 lb (907 kg)
  • Fuel capacity: 54 U.S. gallons (200 L; 45 imp gal)
  • Powerplant: 1 × Lycoming IO-360-A1A


  • Never exceed speed: 222 kn; 410 km/h (255 mph)
  • Service ceiling: 20,000 ft (6,100 m)
  • Rate of climb: 2,200 ft/min (11 m/s)

See also[edit]

Related development


  1. ^ "Osprey Aircraft/ GP-4". Ospreyaircraft.com. Retrieved 2012-10-13. 
  2. ^ a b c Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 114. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  3. ^ "Osprey Aircraft/ GP-4". Ospreyaircraft.com. Retrieved 2012-10-13. 
  4. ^ www.aircraftspruce.com. "GP4 and Osprey from". Aircraft Spruce. Retrieved 2012-10-13. 
  5. ^ "Flying". 133. 2006. 
  6. ^ "Osprey Aircraft/ GP-4". Ospreyaircraft.com. Retrieved 2012-10-13.