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Speedy11(at)aol.com
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 Posted: Mon Mar 29, 2010 4:17 pm Post subject: Sealing Around Engine Baffles |
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Matt,
I say horsepucky!
Install your engine baffling. Go fly the airplane. Then spend hours putting red RTV in every crevasse and fly it again. You will notice there is no difference in your CHTs or Oil Temp. None.
Now - if your goal is maximum speed, then you will want to pay more attention to sealing the air cooling flow since it produces 30-40% of your overall drag. But, if you are trying to maximize speed, there are more important things to do to reduce cooling drag than filling every tiny opening with RTV. Making a plenum is more important. Improving the exit air flow is more important. Optimizing the intake/exit ratio is more important. Once those are done, then sealing all tiny openings with RTV is the final step.
I flew my RV-8 without RTV sealing the baffling and then sealed it carefully with RTV. Zero difference in any temperatures. None.
Stan Sutterfield
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japhillipsga(at)aol.com
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| Posted: Wed Mar 31, 2010 5:27 pm Post subject: Sealing Around Engine Baffles |
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Stan, I've never met you, but your making a ton of sense. I've been known to pole vault over mouse turds a few times and common sense has to prevail. Thanks for the info and assistance you gave me on my MGL EFIS. now in my 8a. Best regards, Bill
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