faster-than-sound aircraft

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• Sound barrier — In aerodynamics, the sound barrier usually refers to the point at which an aircraft moves from transonic to supersonic speed. The term came into use during World War II when a number of aircraft started to encounter the effects of compressibility …   Wikipedia

• sound barrier — sound .barrier n the sound barrier the sudden increase in air pressure against a vehicle, especially an aircraft, when it is travelling near the speed of sound break the sound barrier (=travel faster than the speed of sound) …   Dictionary of contemporary English

• sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …   Universalium

• Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …   Universalium

• sound barrier — 1. Also called sonic barrier, transonic barrier. (not in technical use) a hypothetical barrier to flight beyond the speed of sound, so postulated because aircraft undergo an abruptly increasing drag force induced by compression of the surrounding …   Universalium

• Sound ranging — In land warfare, sound ranging is a method of determining the coordinates of a hostile artillery battery using data derived from the sound of its guns (or mortar or rockets) firing. The same methods can also be used to direct artillery fire at a… …   Wikipedia

• sound barrier — noun the increase in aerodynamic drag as an airplane approaches the speed of sound • Syn: ↑sonic barrier • Hypernyms: ↑drag, ↑retarding force * * * noun the sound barrier : the large increase in air resistance that occurs as an aircraft nears the …   Useful english dictionary

• Aircraft engine — An aircraft engine is a propulsion system for an aircraft. Aircraft engines are almost always a type of lightweight internal combustion engine. This article is an overview of the basic types of aircraft engines and the design concepts employed in …   Wikipedia

• aircraft — I (New American Roget s College Thesaurus) n. See aviation. II (Roget s 3 Superthesaurus) n. airplane, jet, balloon, helicopter, dirigible, blimp, lighter than air craft, airship, airliner, zeppelin, *chopper, *egg beater, flying machine,… …   English dictionary for students

• sound — sound1 [ saund ] noun *** 1. ) count something you can hear: My car is making strange clicking sounds. sound of: the sound of voices/laughter/footsteps not make a sound (=be very quiet): Laura didn t make a sound as she left the room. a ) uncount …   Usage of the words and phrases in modern English

• sound — I UK [saʊnd] / US noun Word forms sound : singular sound plural sounds *** Talking or writing about sound: bang a sound like something exploding: There was a loud bang and a puff of smoke. rattle a sound like a loose object hitting another object …   English dictionary