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It is effective when the helicopter strikes the wires at angle of less than 90 degrees and at speeds more than 30 knots (35 mph; 56 km/h). [7] The system is designed to cut a 3 ⁄ 8 -inch (9.5 mm) steel cable with a breaking strength of 12,000 lb (5,400 kg).
A variable-sweep wing allows the pilot to use the optimum sweep angle for the aircraft's speed at the moment, whether slow or fast. The more efficient sweep angles available offset the weight and volume penalties imposed by the wing's mechanical sweep mechanisms. Its greater complexity and cost make it practical mostly for military aircraft.
The L-39-2 was retained by Bell to support their X-2 program, being modified with a new fully swept wing of a design intended for the X-2. [ 1 ] [ 3 ] On December 12, 1949, both aircraft were transferred to the Lewis Research Center before being sold for scrap in 1955.
Developed from the Sukhoi Su-7, the Su-17 was the first variable-sweep wing aircraft to enter Soviet service and featured updated avionics. The aircraft also has variants which were designed to be exported to non-Soviet states such as the Sukhoi Su-22 and the less popular Su-20. It was produced from 1967 to 1990.
The wings can sweep from 15 degrees to 67.5 degrees (full forward to full sweep). Forward-swept wing settings are used for takeoff, landings and high-altitude economical cruise. Aft-swept wing settings are used in high subsonic and supersonic flight. [74] The B-1's variable-sweep wings and thrust-to-weight ratio provide it with improved takeoff ...
The term variable-geometry wing is often used synonymously with variable-sweep, though strictly speaking it is a type of variable geometry. Wikimedia Commons has media related to Variable-sweep wing aircraft .
The origins of the P.1052 were in a 1945 design study by the Hawker design team for a development of the P.1040 using swept back wings. Interest was not shown by the Ministry of Supply until the spring of 1946 when Air Ministry specification E.38/46 (to undertake studies into the aerodynamic properties of swept wings) was issued, and a contract awarded in May 1947 for Hawker to supply two ...
A composite photograph showing the Bell X-5’s variable-sweep wing. The Bell X-5 was the first aircraft capable of changing the sweep of its wings in flight. It was inspired by the untested wartime P.1101 design of the German Messerschmitt company. In a further development of the German design, which could only have its wing sweepback angle ...