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A leading-edge extension (LEX) is a small extension to an aircraft wing surface, forward of the leading edge. The primary reason for adding an extension is to improve the airflow at high angles of attack and low airspeeds, to improve handling and delay the stall. A dog tooth can also improve airflow and reduce drag at higher speeds.
Tailless aircraft have been flown since the pioneer days; the first stable aeroplane to fly was the tailless Dunne D.5, in 1910. The most successful tailless configuration has been the tailless delta, especially for combat aircraft, though the Concorde airliner is also a delta configuration.
GAL.56/01 (serial number TS507) Also known as the "Medium-V" version, had a constant 33.5 deg wing sweepback at the leading edge, 28.4 deg at quarter chord.On 13 November 1944, Robert Kronfeld piloted the first flight at Farnborough, towed by an Armstrong Whitworth Whitley.
Employing the main fuselage section and engine of the de Havilland Vampire mated to a longer fuselage with a single fin and swept wings, the de Havilland DH 108 was proposed in 1944 as an aerodynamic test bed for tailless designs, particularly the DH.106 Comet which had initially been considered a tailless, swept-wing concept. [1]
The concept of the flying wing was born on 16 February 1876 when French engineers Alphonse Pénaud and Paul Gauchot filed a patent for an aero-plane or flying aircraft [5] powered by two propellers and with all the characteristics of a flying wing as we know it today. [6] Tailless aircraft have been experimented with since the earliest attempts ...
The wing was "washed out", having a slight twist which reduced the angle of incidence progressively towards the tips, providing a near-stationary overall centre of pressure and ensuring that the aircraft was stable in pitch. Thus, no horizontal stabiliser was needed and the craft was tailless, allowing the fuselage to be relatively short.
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A tailless aircraft is one which has no separate horizontal stabilizer or control surface, either behind or in front of the main wing. List of aircraft [ edit ]