RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-05 Thread Richard Bytheway
-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: FlightGear developers discussions Subject: RE

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-04 Thread Richard Bytheway
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 years back

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-04 Thread Erik Hofman
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 ___

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-04 Thread David Megginson
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

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-04 Thread Jim Wilson
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? IIRC

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-04 Thread Vivian Meazza
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 propeller would be supersonic and therefore

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-03 Thread Vivian Meazza
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 where I got

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-05-02 Thread 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 where I got it:

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-27 Thread Jim Wilson
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 in the

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-23 Thread Vivian Meazza
Wolfram Kuss asked I did not see the original thread. What Spitfire version are you speaking about? Spitfire Mk IIA Regards Vivian ___ Flightgear-devel mailing list [EMAIL PROTECTED]

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-22 Thread Wolfram Kuss
I did not see the original thread. What Spitfire version are you speaking about? Bye bye, Wolfram. ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-21 Thread Vivian Meazza
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 reduction

RE: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-21 Thread Vivian Meazza
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 was fitted

Re: [Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-21 Thread Andy Ross
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

[Flightgear-devel] Spitfire Propeller vs. YASim

2004-04-20 Thread 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 reduction gearing, which I think means