> -Original Message-
> From: Vivian Meazza
> Sent: 04 May 2004 7:38 pm
> To: 'FlightGear developers discussions'
> Subject: RE: [Flightgear-devel] Spitfire Propeller vs. YASim
>
> Richard Bytheway wrote
>
> > Sent: 04 May 2004 10:42
> > To:
Richard Bytheway wrote
> Sent: 04 May 2004 10:42
> To: FlightGear developers discussions
> Subject: RE: [Flightgear-devel] Spitfire Propeller vs. YASim
>
>
> > I had already shown by some pretty simple math that at 2850
> > rmp the tips of
> > a 1.65m radius
Richard Bytheway said:
> > I had already shown by some pretty simple math that at 2850
> > rmp the tips of
> > a 1.65m radius propeller would be supersonic and therefore highly
> > improbable, but we now know that the data of hp, gear ratio,
> > rpm etc all tie
> > together.
At higher altitudes
Richard Bytheway wrote:
I have a memory from years back of being told that the reason the
Spitfire had such a distinctive sound was that the propellor tips _were_
supersonic. Maybe it was just heresay.
I don't know about the Spitfire, but I understand that's the case with many
floatplanes -- you c
Richard Bytheway wrote:
I have a memory from years back of being told that the reason the Spitfire had such a distinctive sound was that the propellor tips _were_ supersonic. Maybe it was just heresay.
That probably was for the Harvard.
Erik
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> I had already shown by some pretty simple math that at 2850
> rmp the tips of
> a 1.65m radius propeller would be supersonic and therefore highly
> improbable, but we now know that the data of hp, gear ratio,
> rpm etc all tie
> together.
>
> Thanks
>
> Vivian Meazza
>
I have a memory from
Wolfram Kuss
>
> >Spitfire Mk IIA
>
> Ah - surprising!
>
> Here is an email Rick "Fuelcock" sent me a short while ago. I
> hope it helps. Sorry for the poor formating.
> --- snip -
> Rather than send you the GBE code , I will direct you to the
> site whe
>Spitfire Mk IIA
Ah - surprising!
Here is an email Rick "Fuelcock" sent me a short while ago. I
hope it helps. Sorry for the poor formating.
--- snip -
Rather than send you the GBE code , I will direct you to the site
where I got
it:
http://www.aeromech.usyd
Andy Ross said:
> Vivian Meazza wrote:
> > Here are some calculations on propeller rpm.
> > [...]
> > We can see that 2850 is unlikely to be the rpm of a 10.75 diameter
> > propeller
>
> Yeah, you're right. This is a real bug. I was playing with it this
> morning, and we're hitting an edge case
Wolfram Kuss asked
> I did not see the original thread. What Spitfire version are
> you speaking about?
>
Spitfire Mk IIA
Regards
Vivian
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I did not see the original thread. What Spitfire version are you
speaking about?
Bye bye,
Wolfram.
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Vivian Meazza wrote:
> Here are some calculations on propeller rpm.
> [...]
> We can see that 2850 is unlikely to be the rpm of a 10.75 diameter
> propeller
Yeah, you're right. This is a real bug. I was playing with it this
morning, and we're hitting an edge case in the propeller solver.
The pr
Vivian Meazza wrote
>
> Andy Ross
>
> > [Starting a new thread. The reply nesting level in my
> > mozilla window was getting freaky.]
> >
> > Vivian Meazza wrote:
> > > The engine I'm trying to specify developed 1140 HP at engine
> > > revolutions of 2850 rpm at a boost pressure of 9 psi. It
Andy Ross
> [Starting a new thread. The reply nesting level in my
> mozilla window was getting freaky.]
>
> Vivian Meazza wrote:
> > The engine I'm trying to specify developed 1140 HP at engine
> > revolutions of 2850 rpm at a boost pressure of 9 psi. It was fitted
> > with 1:0.477 reducti
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