On the FJ-3, the new wing leading edges also held extra fuel.

Its wings are built around a wooden box spar and plywood covered except for fibreglass leading edges.

Additionally, bleed air is used to keep critical parts of the aircraft (such as the wing leading edges) ice-free.

The system consists of heat-conducting graphite foil panels on the wing and tail leading edges.

Proposed version, the engines were relocated to the wing leading edges.

These will be accompanied by L-band radars on the wing leading edges.

It had a constant chord centre section with outboard taper on both leading and trailing edges.

For example, even relatively minor damage on the wing leading edges could drastically reduce top speed.

The F.90 had a conventional undercarriage with single mainwheels under the wing leading edges and a rear skid.

The tailplane was also straight-tapered, though with the taper more equally distributed between leading and trailing edges.