1947 Rene Fournier started designing the RF1. Avion-Planeur (Airplane-Glider)

The first flight was July 6 1960.

RF1

Wing Span 37.75' (11.20m)
Empty Weight 496lb (225kg)
Gross Weight 738lb (335kg)
Cruise 92mph (150km/h)
Stall Speed 40mph (65km/h)
Service Ceiling 16,400ft (5,000m)
Range Max Fuel (310 miles) (500km)
Engine 27hp Miettaux 1131cc (VW based)
Propeller Evra
L/D 17:1

RF1 Prototype

RF2

Wing Span 37.75' (11.20m)
Empty Weight 627lb (245kg)
Gross Weight 860lb (350kg)
Cruise 92mph (150km/h)
Stall Speed 40mph (65km/h)
Rate of Climb 590fpm (3m/s)
Service Ceiling 18,000ft (5,500m)
Range Max Fuel (310 miles) (500km)
Engine 39hp Rectimo 4 AR 1200 (1192cc) (VW 40hp based)
Propeller Hoffmam
Fuel 7.9 gal. (30 liters)
Min. Sink 236fpm (1.2m/s)
L/D 17:1
Load Factor +5.3/-2.65