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Morocketman(at)aol.com
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 Posted: Thu Jul 06, 2006 10:58 am Post subject: Need Help with Cowling Ducts |
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John Goodman just finished and flew his beautiful RV-9/Suburu. His oil cooler is supplied by a 2 1/2" S.C.A.T. tube that begans in the left intake of the cowling. With the intake horizontal at the bottom of the intake, oil temps were at the very upper limit near 250F. After installing a 2 inch "temporary" 90 degree elbow (thanks to the Aviation Department at Lowe's), temps are acceptable at about 205F on 90F days here in Missouri.
Does anyone have expertise in ducts in the left side of RV cowlings? Would a N.A.C.A. duct work installed at 45 degrees to the airstream on the forward underside of the cowl? Would a plain round duct work just as well?
There is a guy in Dallas (?) whose RV-8 (?) has several ducts to cool his turbo chargers. The airplane has a nickname like "Greased Lightning"? Anyone know him or his experience with ducting? Please respond off list, or send me his phone number.
Anyone know of a source of fiberglass ducts which would adapt well to the inside of an RV-9 cowling into a S.C.A.T. tube?
Thanks everyone, Les Featherston 417-425-3595
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n395v
Joined: 10 Jan 2006
Posts: 450
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| Posted: Sun Jul 09, 2006 6:20 pm Post subject: Re: Need Help with Cowling Ducts |
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Les,
Is he sure his transducer is working correctly?
I run air thru my oil cooler after it has been over the cylinders and have 30% of the oil cooler covered and can't get my oil temps above 160 on a hot day.
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