07/31/2009. Remarks by Walter van Tilborg: "A design of Robert Counts and developed around the 37 hp Global Tool GMT four-stroke engine that was also under development at the time. The Questor was aimed at the market for light homebuilt aircraft and a prototype first flew in 1983 with a 30 hp Cuyuna T330 two-stroke engine. It later received the GMT engine.

Development was initially by Omni-Weld Co, then taken over by Questor Aircraft and finally by Nostalgair. Only the prototype was completed."