The whole trailing edge is filled with control surfaces; inboard of the ailerons there are camber changing flaps divided into two parts, the inner section deflecting through greater angles than the outer.

[1][2] The pod of the forward fuselage is a steel tube structure, clad in a glass fibre shell which ends just aft of the trailing edge.

The tail is conventional, though the straight tapered, square tipped fin and rudder are noticeably tall, with the similarly shaped tailplane and elevators mounted a little way above the boom.

The landing gear consists of a monowheel, fitted with a drum brake and manually retractable into the fuselage where it is enclosed above two doors, assisted by a fixed tailwheel.

It had immediate success at the national championship level: the prototype won the 1968 Italian contest and in the same year two FK-3s became winner and runner-up at the Austrian competition.