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Message-ID: <40B15CFF.1070704@lucubration.com>
Date: Sun, 23 May 2004 22:25:03 -0400
From: Chad Robinson <crj@lucubration.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Two problems solved, 2 more pop up...
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> Having self adhesive aluminum foil close to the red hot turbo it will 
> melt the adhesive. Also if you are getting oil in this area, you are in 
> trouble already. I agree fiberfax is brittle, but they also have other 
> insulators that will work.

Given that the primary goal is reflecting radiated heat (rather than "real" 
thermal insulation) what's wrong with a coat or two of shiny silver paint? 
It's not as good as polished aluminum but it's decent, and high on the 
reflective scale. Sherwin Williams (and others) sells a product called 
"Silver-Brite" that is marketed as "heat reflective" and "dry heat resistant 
to 700degF". I haven't tested its adherence to epoxy so it might need a primer 
coat to help it stick better (it's designed for metal) but that's not a 
painful step. In any event, it would sure be a lot easier to apply than either 
foil OR fiberfrax, especially to an oddly-shaped cowl.

Unless real thermal insulation properties are necesary?

Regards,
Chad