Prior to the factory closing, these were the latest specifications for Model 40.

Empty weight:………. 250 lbs.
Gross weight: ………550 lbs.
Wingspan: …………… 28 ft.
Length: ……………….18 ft. 6 in.
Height: ……………….. 6 ft. 9 in.
Wing area: ……………168 sq. ft.
Engine: Usually Rotax 447, sometimes a Rotax 503
Available Power: 40-50 hp.
Fuel Tank: 5 Gallon
Cruise speed: 55-60 mph.
VNE: 65 mph.
Stall speed:20 mph.
Rate of climb: 1000 ft ./per/min. (depends on engine and prop)
Take off distance:100 ft.
Landing distance: 100 ft.
Assembly time:25 to 30 hours

Construction Type
Aluminum tubing airframe with Polyester-Dacron sailcloth wing coverings.