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The Coast Guard cutter USCGC Sledge (WLIC-75303), a 75-foot construction tender homeported in Baltimore. USCGC Anvil (WLIC-75301) USCGC Hammer (WLIC-75302) USCGC Sledge (WLIC-75303) USCGC Mallet (WLIC-75304) USCGC Vise (WLIC-75305) USCGC Clamp (WLIC-75306) USCGC Wedge (WLIC-75307) USCGC Spike (WLIC-75308) USCGC Hatchet (WLIC-75309)
A variable-sweep wing, colloquially known as a "swing wing", is an airplane wing, or set of wings, that may be modified during flight, swept back and then returned to its previous straight position. Because it allows the aircraft's shape to be changed, it is a feature of a variable-geometry 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.
A straight-winged North American FJ-1 flying next to a swept-wing FJ-2 in 1952.. There are three main reasons for sweeping a wing: [1] 1. to arrange the center of gravity of the aircraft and the aerodynamic center of the wing to coincide more closely for longitudinal balance, e.g. Messerschmitt Me 163 Komet and Messerschmitt Me 262.
Its wing sweep is around 20° for a Mach 0.75 cruise, instead of 30° for a Mach 0.82–0.84 cruise. Laminar flow is expected along 50% of chord length instead of just aft of the leading edge, halving the wing friction drag , reducing the overall aircraft drag by 8% and saving up to 5% in fuel on an 800 nm (1,480 km) sector.
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 ...
The HFB 320 Hansa Jet used forward sweep to prevent the wing spar passing through the cabin. Small shoulder-wing aircraft may use forward sweep to maintain a correct CoG. Some types of variable geometry vary the wing sweep during flight: Swing-wing: also called "variable sweep wing". The left and right hand wings vary their sweep together ...
A blended winglet is attached to the wing with a smooth curve instead of a sharp angle and is intended to reduce interference drag at the wing/winglet junction. A sharp interior angle in this region can interact with the boundary layer flow causing a drag inducing vortex, negating some of the benefit of the winglet.