It was built around two wooden spars and was mounted at its centre on a chordwise circular cross-section rod, fixed to the fuselage, which acted as a hinge and allowed the wing to see-saw.

[3] Control wires from the ailerons were attached to the fixed hinge rod, providing the required automatic deflections as the wing tilted.

The rate of tilt was limited by a pair of telescopic, sprung struts from mid-chord quite close to the centreline, which met at the bottom centre of the fuselage after passing in through the upper sides.

Leading edge automatic Handley Page slots were fitted to prevent spinning via wingtip stalling.

[3] The fuselage was built around a rectangular section steel tube structure, shaped into an oval with metal covering forward of the lower wing leading edge and for the decking behind the cockpit, with fabric elsewhere.

[1][2] The mainwheels of the J-6 were mounted on split axles from the lower central fuselage, with shock absorbers fixed to the upper longerons.

This aircraft, intended as a military trainer, was powered by a 240 hp (180 kW) Alfa Romeo D2C.30 radial engine and did not have the tilting wing but was otherwise closely similar to the J-6.