[2] The wing and all control surfaces of the MCR4S have carbon fibre spars and ribs, to which preformed aluminium skins are glued.

The ailerons are short, leaving the rest of the trailing edge of each wing divided between two double slotted, three position flaps.

Two large windows light the rear seats, the port side one doubling as an emergency exit.

A variety of Rotax flat four engines may be fitted, driving a two or three blade propeller, which may have fixed or variable pitch.

The main wheels are mounted on short, vertical legs beneath the wings, as on the Club and ULC variants of the MCR01, with a track of 2.33 m (7 ft 8 in).