Designed by W.L.Parker, the Ranger originally had a retractable 11 kW/ 15 bhp engine and a 78 cm/ 31 in propeller. The Ranger was unable to take off on its own, so the Righter engine was fitted instead to give self- launch capability. It has a fixed main wheel plus a taxu wheel in the nose, and no glidepath control devices.
Construction is all aluminum, with a laminated aluminum spar.
Engine: 26 kW/ 35 bhp Righter
Wing span: 11.43 m / 37.5 ft
Aspect ratio: 12
Wing area: 11.33 sq.m / 122 sq.ft
Gross Weight: 91 kg / 200 lb
Payload: 263 kg / 580 lb
Empty weight: 354 kg lb / 780 lb
Wing Load: 31.24 kg/sq.m / 6.5 lb/sq.ft
Airfoil: NACA 4418