Sonic boom
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For other uses, see Sonic boom (disambiguation).
Rapid condensation of water vapor due to a sonic shock produced at sub-sonic speed creates a vapor cone (known as a PrandtlGlauert singularity), which can be seen with the naked eye
A sonic boom produced by an aircraft moving at M=2.92, calculated from the cone angle of 20 deg. An observer hears the boom when the shock wave, on the edges of the cone, crosses his or her location.
Mach cone angleThe term sonic boom is commonly used to refer to the shocks caused by the supersonic flight of an aircraft. Sonic booms generate enormous amounts of sound energy, sounding much like an explosion. Thunder is a type of natural sonic boom, created by the rapid heating and expansion of air in a lightning discharge.
Stall (flight)
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For other uses, see stall.
In fluid dynamics, a stall is a reduction in the lift forces generated by an airfoil as angle of attack increases. This occurs when the critical angle of attack of the airfoil is exceeded, typically about 15 degrees but may vary significantly depending on the airfoil and Reynolds number.
Because stalls are most commonly discussed in connection with aviation, this article discusses stalls mainly as they relate to aircraft, particularly airplanes. Stalls in airplane flight are often experienced as a sudden reduction in lift as the pilot brings the airplane to greater angle of attack and exceeds the critical (stall) angle of attack (as in slowing down below stall speed). A stall of an airplane does not mean that its engine(s)have stopped working, or that the airplane has stopped moving.
http://en.wikipedia.org/wiki/Stall_(flight)
http://en.wikipedia.org/wiki/Sonic_boom
F-16 is gay. my favourite plane in H.A.W.X is SU-35. Also the sounds from this video are weird compared to the real game
yaseen157 11 months ago
wht a noise
cem719 1 year ago