PPRuNe Forums - View Single Post - Which speed should be used in calculating the mach number?
Old 26th Jun 2013, 01:17
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Natstrackalpha
 
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Not quite .. what he is saying is that the equation for Mach number involves static and dynamic pressures and has naught to do with temperature

ahh, I see it all now. . . !

You mean Mach is D over S

D/S


?

So just to make it totally indecipherable, pitot Dynamic increases with speed whereby static reduces with alt . . .
dynamic reduces with alt due to reduction in density (less air per cubic . . space) speed speeds up due to less density thus being the TAS
la di da di da ends up with D over S D/S

No mention of temp here though, ? Except that less temp = greater rho and

Last edited by Natstrackalpha; 26th Jun 2013 at 01:23.
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