TYPE: Tandem-seat sportplane kitbuilt.

PROGRAMME: Development of Country Air (later Warner) Space Walker, of which 46 built. Two-seat versions of Space Walker developed as Revolution I (48.5 kW; 65 hp Teledyne Continental) and Revolution II (74.6 kW; 100 hp Textron Lycoming); further power increase produced Sportster; prototype (N269U) first flown 18 April 1998. New version with revised canopy introduced 2002 and has replaced original model aircraft; length reduced to 6.20 m (20 ft 4 in). Prototype registered N69DA.

CUSTOMERS: 125 Space Walkers and Revolutions built, plus six of original Sportster; two of new Sportsters flying by October 2003.

COSTS: Basic kit US$16,495; fast-build kit US$19,995 (2003).

DESIGN FEATURES: Quoted build time 700 hours. Roll rate 45°/s.

FLYING CONTROLS: Conventional and manual. Horn-balanced rudder and elevators; trim tab in port elevator. Dual controls.

STRUCTURE: 4130 steel tube and fabric fuselage with wooden turtle deck; fabric-covered two-spar wooden cantilever wings. Glass fibre cowling and wingtips. Tail unit identical to Revolution/Space Walker. Compared to early version, new Sportster has lower bottom longeron and lowered bulkheads forward of cockpit.

LANDING GEAR: Tailwheel type; fixed. Tubular welded V legs with tubular bracing and spring shock-absorbers. 6.00-6 tyres, Cleveland wheels with disc brakes. Steerable 15 cm (6 in) Maule tailwheel. Speed fairings on mainwheels.

POWER PLANT: Engines from 63.4 to 119 kW (85 to 160 hp) can be fitted; prototype has 85.6 kW (115 hp) Textron Lycoming O-290-D. Fuel capacity 76 litres (20.0 US gallons; 16.7 Imp gallons).

ACCOMMODATION: Pilot and passenger in tandem in individual open cockpits; choice of three styles of windscreen; alternatively, rear cockpit can be covered with a bubble canopy and front canopy temporarily faired over. Compared to early Sportster, new version has slightly more curved lips to accommodate canopy curvature, and instrument panel moved forward.