The prototype of the Miles Falcon was entered into the MacRobertson Race in 1934, and the M.3B version was entered into the 1935 King's Cup Race.
The M.3B was entered into the 1935 King's Cup Race, and piloted by Tommy Rose won with a speed of 176.28 mph (283.70 km/h). The prototype was fitted with extra fuel tanks and entered into the MacRobertson Race from England to Australia in October 1934. 
