GP-4 (Osprey) George Pereira designed
The GP-4 is the
latest in a series of aircraft designed by George Pereira. It is a
high performance, cross-country type plane, designed to extract the
most speed from the power available, while keeping building costs
within reasonable limits. With two 200 pound people, 75 pounds of
baggage and 52 gallons of fuel, the GP-4 will cruise 240 mph for
1200 miles plus reserve. Fuel burn is less than 11 gallons per hour
on a typical trip. Airfoil selection and drag reduction were primary
considerations. The majority of the construction is of wood with
foam and fibreglass used in cowling and fairing areas. Design
strength at full gross is 8G's positive and 6G's negative.
This was made possible by
using a massive one-piece wing spar. Detailed construction plans are
available. They consist of 57 sheets, drawn with the amateur builder in
mind, plus step-by-step, photo illustrated, construction manual. The GP-4
aircraft has a manual landing gear retracting system that works very well.
However, you can now order a separate set of plans for a brand new
designed hydraulic landing gear.
104 sq ft.
1100 miles, 240 mph
rate of climb
landing distance, ground roll
limiting and recommended speeds
design manoeuvring speed (Va)
never exceed speed (Vne)
stall, power off (Vsl)
landing approach speed
All specifications are based on manufacturer's