The aircraft was designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a cantilever high-wing, a two-seats-in-side-by-side configuration enclosed cockpit, fixed tricycle landing gear and a single engine in pusher configuration.
The aircraft is made from composites. Its 12.41NaN1 span wing has an area of 12m2 and flaps that can be deployed for landing and reflexed for cruise flight. The long wingspan gives the Martin3 a glide ratio of 23:1 and allows power-off soaring flights. The standard engine is the 1000NaN0 Rotax 912ULS four-stroke powerplant.
In 2015 the aircraft was marketed by Galicia Avionica SL.[3]