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George W Braly
Joined: 09 Jan 2006
Posts: 15
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 Posted: Fri Feb 24, 2006 5:12 pm Post subject: Spam> RE: SD-20 Alt performance chart? |
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Six cylinder vacuum pads that are on the same drive shaft as the
magnetos turn at 1.5 x crank RPM.
George
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aadamson(at)highrf.com
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| Posted: Fri Feb 24, 2006 5:52 pm Post subject: Spam> RE: SD-20 Alt performance chart? |
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Thanks George, so for 2500 RPM indicated engine speed, the vacuum pump pad
would be turning at 5000 rpm correct? That makes a little more sense.
Alan
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mprather(at)spro.net
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| Posted: Fri Feb 24, 2006 6:43 pm Post subject: Spam> RE: SD-20 Alt performance chart? |
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Err... Math in public isn't a good idea.. 2500 * 1.5 = 3750..
Matt-
[quote]
<aadamson(at)highrf.com>
Thanks George, so for 2500 RPM indicated engine speed, the vacuum pump
pad would be turning at 5000 rpm correct? That makes a little more
sense.
Alan
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Bob McC
Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON
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| Posted: Fri Feb 24, 2006 6:56 pm Post subject: Spam> RE: SD-20 Alt performance chart? |
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Alan
1.5 x 2500 = 3750 NOT 5000
Bob McC
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_________________
Bob McC
Falco #908
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aadamson(at)highrf.com
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| Posted: Fri Feb 24, 2006 7:50 pm Post subject: Spam> RE: SD-20 Alt performance chart? |
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Now, guys... It's been a long day... Guess I can't even play the Markup vs.
Margin game on this one...  OR, can you, perhaps I did the divide by .5
instead of times by 1.5...
Sorry, you are right
Alan - tail between legs and going back to sanding... I knew I should have
even questioned 5000 rpm, let alone 7500
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