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Is there any formula that relates weight of the aircraft with mach number?

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    $\begingroup$ Without any other parameters? There are a lot of factors that go into speed. This is kind of like asking if there is any relation between a cars weight and how fast it can go... $\endgroup$
    – Ron Beyer
    Feb 14, 2021 at 0:57
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    $\begingroup$ What makes you think there might be a relation between the two? $\endgroup$ Feb 14, 2021 at 1:17

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No, there isn't. Weight (which is a result of mass and gravity) is not related to mach number (which depends on velocity and the local speed of sound). You are comparing apples and oranges.

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