The Warner Revolution II, also marketed as the Space Walker II, is an American homebuilt aircraft that was designed and produced by Warner Aerocraft of Seminole, Florida.

When it was available the aircraft was supplied as a kit or in the form of plans for amateur construction.

[1] The aircraft is intended to be reminiscent of the open cockpit monoplanes of the 1930s, such as the Ryan ST.[1] Developed from the single-seat Warner Revolution I, the Revolution II features a cantilever low wing, a two-seat tandem open cockpit with dual windshields, fixed conventional landing gear with wheel pants and a single engine in tractor configuration.

With full fuel of 17 U.S. gallons (64 L; 14 imp gal) the payload for the pilot, passenger and baggage is 498 lb (226 kg).

[1] The standard day, sea level, no wind takeoff with a 125 hp (93 kW) engine is 400 ft (122 m) and the landing roll is 450 ft (137 m).