Today's Message Index:
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1. 12:38 PM - Re: Dual radiators... (Grant Corriveau)
2. 02:13 PM - Re: Dual radiators... (Ed Anderson)
Message 1
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| Subject: | Re: Dual radiators... |
--> Engines-List message posted by: Grant Corriveau <grantc@ca.inter.net>
Good point... I've read that others use insulated wrapping on the exhaust
stacks to reduce this source of heat... any experience with this? Is the
effectiveness worth the cost/effort?
Thanks again
--
Grant Corriveau
C-GHTF / HDS / CAM100
> From: "Tracy Crook" <lors01@msn.com>
> Reply-To: engines-list@matronics.com
> Date: Tue, 12 Aug 2003 16:59:06 -0400
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Dual radiators...
>
> The main source of under cowl heat problems is often heat from the exhaust
> system, as you mentioned. The air from the rads is often the only thing
> holding temps down under the cowl. If you are successful in sealing the
> cowl for better aerodynamics, my guess is that the problem will get worse
> instead of better. But that's just my guess. Let us know how it goes.
>
> Tracy Crook
Message 2
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| Subject: | Re: Dual radiators... |
--> Engines-List message posted by: "Ed Anderson" <eanderson@carolina.rr.com>
@ca.inter.net>
>
> Good point... I've read that others use insulated wrapping on the exhaust
> stacks to reduce this source of heat... any experience with this? Is the
> effectiveness worth the cost/effort?
>
> Thanks again
>
Most recommendations are not to use such wrappings. A Velocity recently
went down (no injuries to pilot) due to his exhaust headers cracking and
spraying hot exhaust gas on portions of fuel system causing vapor lock. The
builder had wrapped his exhaust with fiberglass header tape and was not able
to spot the crack before it got to the critical point.
Generally, while the wrapping can be effective in reducing undercowl temps,
they can also cause rapid deterioration of the exhaust headers and make it
difficult to catch such conditions as they are hidden by the tape. If you
went this route, it might be better to check into high temperature ceramic
coatings which are reportedly very effective and still permit inspection of
the pipes conditions.
Best Regards
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
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