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Firewall foreward cooling air needs

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recapen(at)earthlink.net
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Posted: Mon Feb 25, 2008 6:01 am Post subject: Firewall foreward cooling air needs

Here's the setup:



IO360B1F6 with CS MT prop, AFP injection, LASAR ignition, Vetterman crossover heater/mufflers in a SamJames cowled/plenum'd RV6A.



I'm planning on putting the oil cooler behind the #4 cylinder with its cutout for airflow feeding the oil cooler.



My heater/mufflers require cooling air over them even when they're not heating the cockpit according to Larry.



I'm thinking that taking the cooling air for both heater/mufflers from the back plate behind the #2 cylinder should be OK - since I'm taking a chunk from each side.



Is this a valid thought? - or does it not matter since I have a plenum.

For the cabin heat air, would it be better to take the air from the vertical plate or the 40 degree angled plate below it?



Thanks,

Ralph

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rv9jim(at)juno.com
Guest

Posted: Mon Feb 25, 2008 12:44 pm Post subject: Firewall foreward cooling air needs

Ralph,

        I have the same situation.  I put in a air source on the ramp for

the #2 cyl for the left muffler.  I put in a source for the port side on

the angled baffle behind #3 cyl.  This seems to be my best way.  I am not

flying yet but the bird is at the painters right now.  Hopefully I'll be

flying by the end of March.

Jim

N15JN

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