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Difference Between Supersonic and Hypersonic

June 11, 2011 Posted by Tanya

Supersonic vs Hypersonic

The rate at which objects travel faster than the speed of sound is expressed in terms of supersonic and hypersonic speeds. Such speeds are measured in terms of Mach. Mach number is defined as the ratio of speed of the aircraft to the speed of sound. Supersonic and Hypersonic are the two main types of speeds of flight. In scientific language, they are better known as the regimes of flight.

Supersonic speed

Supersonic speed is the rate of travel which exceeds the speed of sound, also referred to as Mach 1 speed. Since the speed of sound depends on temperature and composition of air, supersonic speed also varies with changing altitudes. In water at room temperature, it is greater than 1440 m/s, while in solids it is even more. An example of supersonic is, a bullet fired from a gun. Fighter planes and space shuttle also fly at these speeds. Concorde is the only passenger aircraft to travel at such speeds. It took its last flight in 2003 and it is not in use now. The term sonic boom is associated with these speeds. When an aircraft flies at this speed, a person on the ground hears a very loud noise, which is called sonic boom. Sonic boom is produced as a result of the movement of air molecules under a tremendous force.

Hypersonic speed

Hypersonic speeds correspond to very high supersonic speeds. They are basically Mach 5 speeds or five times the speed of sound. The speed of a hypersonic aircraft is around 3000 miles per hour. These speeds are again of three kinds, low hypersonic, hypersonic and high hypersonic. X-15 was the only manned aircraft to fly at low hypersonic speeds, i.e. at Mach 6. During its re-entry, space shuttle also acquires such speeds. The distance between shock wave, generated by a hypersonic aircraft and the aircraft is smaller than in case of supersonic aircraft.

In brief:

Supersonic vs Hypersonic

♦ Supersonic is Mach 1 speed while hypersonic is Mach 5 speed.

♦ Supersonic speed is greater than the speed of sound while hypersonic is 5 times the speed of sound.

♦ Concorde is the only supersonic passenger airliner while there is no hypersonic passenger airliner.

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Filed Under: Physics Tagged With: Concorde, example of supersonic, Fighter planes, high hypersonic, hypersonic, hypersonic speed, low hypersonic, Mach, Mach 1 speed, Mach 5 speeds, regimes of flight, sonic boom, speed of sound, supersonic, supersonic speed, X-15 manned aircraft

About the Author: Tanya

Comments

  1. Dr. Ron Polland says

    May 14, 2015 at 4:42 pm

    1440 m/s = 4,724 feet per second, or Macxh 5. I think you meant 410 m/s

    Reply

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