sound barrier:

More on sound barrier from Fact Monster:

• Famous Firsts in Aviation - Famous Firsts in Aviation Cayley's Helicopter Wilbur and Orville Wright with their second ...
• aerodynamics: Effect of Hypersonic Speeds - Effect of Hypersonic Speeds Recently, intense research has gone into the development of planes that ...
• Chuck Yeager - Biography of Chuck Yeager, The man who broke the sound barrier
• The Speed of Sound - The Speed of Sound Source: Air & Space/Smithsonian. An unusual cloud sometimes appears just as ...
• Experimental and Spy Planes: Bell X-1 - A plane that went faster than the speed of sound

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