A 2/4 seater with a single pusher engine, it was built in France and the United States in small numbers with several variations.

[2] It is a low wing cantilever monoplane with a T-tail, of conventional layout except for its pusher configuration; this places the cabin well ahead of the leading edge and provides an excellent downward view.

[3] The first prototype of the plan-built G-801 Orion flew for the first time on 2 June 1981, configured as a two-seater and powered by a 65 hp (48.5 kW) engine.

[3] The first kit-production aircraft, designated G-802 Orion, differed from the G-801 chiefly by having a wider cabin and a slightly longer fuselage (increased by 140 mm or 5.5 in).

[3] By early 1985 140 plans for G-801s and 80 G-802 kits had been sold, but the development programme was halted by the death of its designer on 3 April 1985 whilst demonstrating the aircraft.