Foster-Wickner F / FW 1 / FW 2 / FW 3 / GM1

The Wicko was originally designed to use a Ford V8 car engine, and the first prototype two-seat Wicko FW1, with a modified Ford V8 engine known as the Wicko F, was completed in September 1936. This was later re-engined with a 90hp Cirrus Minor I as the FW2. A 150hp Cirrus Major installation, specifically for the 1937 King's Cup race, resulted in the FW3, and this engine became the standard powerplant for all GMI production models.

Nine Wickos were built 1938-1939 at Southampton designated G.M.1 with the more powerful Gipsy Major engine, that being the total production.