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In general terms, why you get a shock wave is because as the aircraft moves through the air, it pushes air out of the way in front of it. This pressure wave travels ahead of the aircraft at the speed of sound, pushing air out of the way. As the aircraft nears the speed of sound, it catches up with the advancing pressure wave. Eventually the aircraft goes faster than the air's pressure wave and the air more or less "instantly" moves from a state of rest to the speed of sound - a shock is formed.
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It actually happens long BEFORE the aircraft reaches the speed of sound. Since the air has to flow around the aircraft, it has to speed up to faster than the aircraft to get around some curves. (Typically, you get higher speeds over the wing than under it, or around the engines compared to around the fuselage.) In these cases you can get weak local shock waves even though the aircraft is flying much slower than the speed of sound. Weak shock effects can be found at around 0.7 Mach (speed of sound) and get very significant when you go over about Mach 0.9.
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You also get shock waves in engine inlets and engine exhaust, but I don't think you wanted to know about those.
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if you mean when you go thru the sound barrier they dont because as you go thru it you pull away so you never get a bangMilitary and airline pilot testing?
As the aircraft reaches approx. 750 mph (mach 1) it catches up and overtakes it's own sound.......hence "shock waves"....when it passes the speed of sound.
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Shock waves are generated when a body approaches the speed of sound. We usually think of it in terms of aircraft but it applies to other bodies as well. The shock waves occur when the air particles can’t get out of the way of the aircraft quickly enough. The air “piles up” forming the shock waves and usually the accompanying sonic boom(s).The shock waves are quite visible in wind tunnels and at times when the humidity is high.
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When you pass through mach one. Thats something the Concorde was known for....passing through mach one without as much as a bang or a boom... but in most other aircraft it does!who is first women pilot in the world?
If you mean turbulance. warm air rises and cool air decends so if you are flying over mountains you get cool air in a pocket that forces the aircraft down depending on how high the aircraft is flyingMore Questions & Answers ...
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