is a aerobatic version of the RF3. A few prototypes were built in
France and 155 RF4-D
(c/n 4004 to 4158) were
built in Germany by Sportavia. There are about 15 in the U.S.A.
Wing Span 36ft 11.25in (11.26m)
Empty Weight 600lb (kg)
Gross Weight Aerobatic 804lb (365kg)
Gross Weight Utility 859lb (390kg)
Max Cruise Speed 112mph (180km/h)
Economy Cruise (100mph) (160km/h)
Stall Speed 43.5mph (70km/h)
Service Ceiling 19.700ft (6,000m)
Range Max Fuel (415 miles) (670km)
Engine 39hp Rectimo 4 AR 1200.
Fuel Consumption @ 105mph (170km/h) 2.4 gph (9 liters/hr)
Fuel Consumption @ 68mph (110km/h) 1.1 gph (4 liters/hr)