Oh. There are several people I know who think differently, but I'm sure that
it is counter-productive.
Perhaps he means never fully supersonic, just with a slight brush with the
local Mach No?
Anyway, I agree with you, Bill :-)
Chris
On 28 Jul 2012, at 22:00, Bill Pearce <billcpearce@xxxxxxx> 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.
> -----Original Message-----
> From: Chris Barker
> Sent: Saturday, July 28, 2012 1:42 PM
> To: Olympus Camera Discussion
> Subject: Re: [OM] Fly-in airplane photo of the day
>
> Perhaps because it has a small prop whose tips go supersonic, Bill? If it
> has a prop with a small area, perhaps it has to go faster to create
> sufficient thrust.
>
> I'll ask someone who might know, at work.
>
> Chris
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