Machmeter works how?
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Join Date: Jan 2018
Location: Mainz
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Machmeter works how?
Hello guys,
i have a question regarding the machmeter.
How does it change if we descend during an inversion with constant CAS? I think it should increase because the temperature is decreasing as well because of the inversion... right?
thanks for help
i have a question regarding the machmeter.
How does it change if we descend during an inversion with constant CAS? I think it should increase because the temperature is decreasing as well because of the inversion... right?
thanks for help
Join Date: Oct 2017
Location: UK
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Incorrect.
The machmeter measures the ratio of dynamic pressure and static pressure.
It is not dependent upon air temperature.
Therefore in your scenario the reading will decrease as normal.
The machmeter measures the ratio of dynamic pressure and static pressure.
It is not dependent upon air temperature.
Therefore in your scenario the reading will decrease as normal.
Last edited by dook; 22nd Jan 2018 at 20:13. Reason: addition
The speed of sound is dependent on temperature though, so wouldn’t a drop in temp cause an increase in Mach for a given TAS as the local speed of sound has decreased?
