Machmeter
Sign in to savethumb|right|Illustration showing the face of a Machmeter reading a Mach number of 0.83
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thumb|right|Illustration showing the face of a Machmeter reading a Mach number of 0.83
A Machmeter is an aircraft pitot-static system flight instrument that shows the ratio of the true airspeed to the speed of sound, a dimensionless quantity called Mach number. This is shown on a Machmeter as a decimal fraction. An aircraft flying at the speed of sound is flying at a Mach number of one, expressed as Mach 1.
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turn and slip indicator
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flight instrument
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pitot-static system
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aviation
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compass
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aircraft
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decimal
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barometer
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speed of sound
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International Civil Aviation Organization
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gyroscope
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Mach number
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ratio
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altitude
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Federal Government of the United States
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global navigation satellite system
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dimensionless quantity
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