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The delta wing is awing planform in the form of a triangle, named after the Greekuppercase deltawhich is a triangle .
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DFS (German Institute of Flight) studied a number of
ramjet powered (sometimes coal-fueled) delta-wing
interceptor aircraft during the war, one progressing as
far as a glider prototype.Some high-ranking Convair
engineers became quite interested in his interceptor
designs, and they started work on a larger test version
known as the
Convair XF-92
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The F-92 fighter was never needed so it never
went into production.
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http://en.wikipedia.org/wiki/Dassault_Aviation
The tail-less delta became the favored design forhigh-speed use, and was used
by Convair and by Dassault Aviation
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The British started their research post war
with and used the delta, for theirAvro
Vulcan strategic bomber and the Gloster
Javelin fighter.
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The tailed delta wing was used in the MiG-21(Fishbed) and Sukhoi Su-9/Su-11/15
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example of a canard-equipped delta-winged
aircraft was the Tupolevbureau's
Tu144 supersonic transport airliner.
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The primary advantage of the delta wing
design is that the wing's leading edgeremains behind the shock wave generated bythe nose of the aircraft when flying atsupersonic speeds.
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Another advantage is that as the angle of attack increases the leading edge of the wing generates a vortex
which remains attached to the upper surface of the wing, giving the delta a very high stall angle.
Additional advantages of the delta wingare simplicity of manufacture, strength,and substantial interior volume for fuel or otherequipment. Because the delta wing is simple, itcan be made very robust (even if it is quite thin),and it is easy and relatively inexpensive to build.
Adelta wing has the advantage ofa large sweep angle but also greaterwing area than a simple swept wingto compensate for the loss of liftusually experienced in sweepback.
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The disadvantages, especially marked in the older tailless delta designs, are
a loss of total available lift caused by turning up the wing trailing edge or the
control surfaces (as required to achieve a sufficient stability) and the high
induced drag of this low-aspect ratio type of wing. This causes delta-winged
aircraft to 'bleed off' energy very rapidly in turns,disadvantage in aerial
maneuver combat and dogfighting.
Sweepback has been used primarily in the interest of minimizing
transonic and supersonic wave drag. At subsonic Mach numbers,
however, the disadvantages dominate. They include high induced drag(due to small wing span or low aspect ratio), high angles of attack formaximum lift, and reduced effectiveness of trailing-edge flaps.
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http://www.centuryofflight.net/Aviation%20history/evolution%20of%20technology/Delta%20Wings.htm
http://history.nasa.gov/SP-367/chapt6.htm
http://en.wikipedia.org/wiki/Delta_wing
http://en.wikipedia.org/wiki/Dassault_Aviation
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