If we had a dollar for every PhD who proclaimed something impossible
we'd have... :-)
Chuck Norcutt
On 7/28/2012 5:00 PM, Bill Pearce wrote:
> I have a friend, an aerodynamicist with a PhD, who states clearly that no
> prop tip ever goes supersonic, as that would make it unable to perform its
> task. I'm not so sure I believe him, though. There's very l little else that
> would account for that noise. Once heard, never forgotten.
--
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