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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)
Four basic configurations which have used vortex lift are, in chronological order, the 60-degree delta wing; the ogive delta wing with its sharply-swept leading edge at the root; the moderately-swept wing with a leading-edge extension, which is known as a hybrid wing; and the sharp-edge forebody, or vortex-lift strake. [7]
It had a unique mechanism for wing sweep that combined tracks on the fuselage sides and the underside of the wings, which was actuated by hydraulically-driven ball screws positioned at the wing's inner ends. [20] The wings could be swept from 20 degrees to 70 degrees; at the 70-degree position, longitudinal control was maintained by wing tip ...
Larger cutters, over 181 feet (55 m) in length, are controlled by Area Commands, the Atlantic Area or Pacific Area. Smaller cutters come under control of district commands. Cutters usually carry a motor surf boat and/or a rigid-hulled inflatable boat. Polar-class icebreakers (WAGB) carry an Arctic survey boat (ASB) and landing craft.
To test the low-speed characteristics of swept wings, the US Navy contracted Bell Aircraft to modify two P-63 Kingcobras [note 1] as test aircraft for use by NACA. [2] These aircraft, assigned the bureau numbers 90060 and 90061, [ note 2 ] were designated L-39-1 and L-39-2 , based on Bell's code letter "L" and the aircraft's model number "39".
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.