The RF7 is a aerobatic version of the RF4D having a shorter wing and larger tail feathers. Engine is a 68hp Limbach 1700 D. Only 1 prototype and few Homebuilts were built.

Wing Span 30ft 10in (9.4m)
Empty Weight 660lb (300kg)
Gross Weight 981lb (445kg)
Max Cruise Speed at S/L 137mph (220km/h)
Stall Speed 54mph (86.5km/h)
Range Max Fuel (403 miles) (650km)

First Flight March 5 1970