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Mach 2

Last post 12-14-2008, 3:25 PM by devine. 0 replies.
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  •  12-14-2008, 3:25 PM 6208

    Mach 2

    When an aircraft fly's mach 1 the is a sonic boom heard on the ground, is there a second sonic boom when the aircraft pass's thru mach 2?  and can the pilot hear either
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