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At the other end of the speed scale, the Rogallo flexible wing proved a practical design for the hang glider and other ultralight aircraft. The delta wing form has unique aerodynamic characteristics and structural advantages. Many design variations have evolved over the years, with and without additional stabilising surfaces.
Dyke Delta JD-2 in flight at EAA AirVenture Oshkosh in 2011, with landing gear retracted. The aircraft is metal framed with skin of laminated fiberglass or covering of Dacron fabric. Its landing gear is retractable. The delta configuration offers a relatively high cruise speed compared to conventional aircraft of the same weight and power.
Thin airfoil theory assumes the air is an inviscid fluid so does not account for the stall of the airfoil, which usually occurs at an angle of attack between 10° and 15° for typical airfoils. [20] In the mid-late 2000s, however, a theory predicting the onset of leading-edge stall was proposed by Wallace J. Morris II in his doctoral thesis. [ 21 ]
In January 1945, Jones developed a theory of the delta wing based on thin-airfoil theory. Others at Langley were sceptical until supersonic testing of models was done by Robert Gilruth and in April by Theodore von Karman. Jones's theory was not truly accepted until that summer when Von Karman's team of investigators found that German experts ...
Tailless delta: a classic high-speed design, used for example in the Dassault Mirage III series. Tailed delta: adds a conventional tailplane, to improve handling. Used on the Mikoyan-Gurevich MiG-21. Cropped delta: wing tips are cut off. This helps avoid tip drag at high angles of attack. The Fairey Delta 1 also had a tail. At the extreme ...
The Convair XF-92 (re-designated from XP-92 in 1948) is an American, delta wing, first-generation jet prototype. Originally conceived as a point-defence interceptor, the design was later used purely for experimental purposes and only one was built.
The Delta V, built as the DFS 40 was a blended wing body design for comparison with the DFS 39. [8] In 1933, the RGG was reorganised into the Deutsche Forschungsanstalt für Segelflug (German Institute for Sailplane Flight, DFS) and the Delta IVd and Delta V were designated as the DFS 39 and DFS 40 respectively. Lippisch thus saw five designs ...
The Convair F-102 Delta Dagger [N 2] is an interceptor aircraft designed and produced by the American aircraft manufacturer Convair. A member of the Century Series , the F-102 was the first operational supersonic interceptor and delta-wing fighter operated by the United States Air Force (USAF).