The Ercoupe is often used to enable disabled pilots to fly, by virtue of some models having the rudders linked to the ailerons, and hence no need for pedals.
If you really need inspiration, Jesssica Cox in the US showed it is also possible without arms:
Head In the Clouds | Right Footed
There is also Kim Blackseth, a paraplegic in California, who adapted one, flying basically with shoulder movement and extensions to the yoke and throttle.
YouTube - Ercoupe Flying Movie - First Flight
In the UK, disabled pilot R. Nesbitt-Dufort was the joint winner of the 1989 King's Cup Air Race at Leicester in Ercoupe G-ARHF.