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Old 4th October 2014 | 11:59
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MightyBoo
 
Joined: Apr 2011
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From: 1°17' N 103° 51'E
Help: Calculating Mach number

Hi all,

- Using the LSS formula a = 39 √ T and..
- Mach number (M) = Speed of aircraft (TAS) ÷ Local speed of sound (a)

What is the Mach number of an aircraft doing 453 knots groundspeed, with a 58 knot headwind component, cruising at FL380, at ISA plus 5 degrees Celsius?

Appreciate if the workings can be illustrated. Thank you all.
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