with the first retractable landing gear appearing on the Glenn Curtiss Tried, also known as the Curtiss Model E, or the A-1, ...

Landing gear (also known as the undercarriage ... These wheels are frequently retractable to reduce drag while in flight. The wheels may also be modified by the use of skis to allow the plane to land ...

The Gabriél BK160-200 is an all-composite, piston-engine, two-seat tandem aircraft with retractable landing gear, fully ...

Hybrid Air Vehicles The landing gear has changed from non-retractable helicopter-type landing skids (right) to six retractable legs The previous prototype, which was 302ft (92m) long and cost £ ...