Speed of sound: Timeline

1698   Isaac Newton Isaac Newton

[i] [[[Old Style and New Style dates|OS]] [i]: [[25 December]] [i] [[1642]] [i]... 

 calculates the speed of sound

1947   American test pilot, Captain Chuck Yeager flies a Bell X-1 faster than the speed of sound, the first man to do so in level flight.

1970   The Soviet Soviet Union

The Union of Soviet Socialist Republics , more commonly known as the Soviet Union, was a Communist state [i] ... 

 Tupolev Tu-144 becomes the first commercial transport to exceed Mach Speed of sound

The speed of sound is a term used to describe the speed of sound [i] waves passing through an elastic [i] ... 

 2.

2004   NASA NASA

The National Aeronautics and Space Administration is an agency of the United States Government [i], res ... 

's hypersonic jet ''ScramJet'' breaks a record by reaching a velocity of about 7,000 mph in an unmanned experimental flight. It obtains a speed of Mach 9.6, almost 10 times the speed of sound.