RV10 Cowling Heat Shield

[X747]

I have experienced blistering on the interior of the lower cowling from the exhaust stacks. Any suggestions for a permanent fix.

[Mike S]

Vans has a heat shield product that is designed for this.

Adhesive backed alum foil.

Big thing is to get the inner cowl surface clean, and smooth. A wet coat of epoxy brushed on is a good way to do it. Sand as needed, roll on foil.

[az_gila]

Originally Posted by Mike S

Vans has a heat shield product that is designed for this.

Adhesive backed alum foil.

Big thing is to get the inner cowl surface clean, and smooth. A wet coat of epoxy brushed on is a good way to do it. Sand as needed, roll on foil.

And then seal the edges with a narrow brushed coat of epoxy or red RTV.

[AviatorJ]

Originally Posted by Mike S

Vans has a heat shield product that is designed for this.

Adhesive backed alum foil.

Big thing is to get the inner cowl surface clean, and smooth. A wet coat of epoxy brushed on is a good way to do it. Sand as needed, roll on foil.

Just did this... hope it works, used aluminum tape on the edges as well.

[Lenny Iszak]

In addition you could use some of these where the exhaust pipes get close to the cowling.

http://www.aircraftspruce.com/catalo...clickkey=20271

[Bavafa]

For maximum protection, you can use fiberfrax and top it off with the aluminum foil. I had used this in my lower cowl and was amazing how cool the bottom cowl felt to touch even after just shut down of the engine.

http://www.aircraftspruce.com/catalo...SABEgLn__D_BwE

[BillL]

Originally Posted by Bavafa

For maximum protection, you can use fiberfrax and top it off with the aluminum foil. I had used this in my lower cowl and was amazing how cool the bottom cowl felt to touch even after just shut down of the engine.

http://www.aircraftspruce.com/catalo...SABEgLn__D_BwE

If the pipe is really close, the mechanical heat shield on the pipe may hit, mine did. I turned to this method, it is recommended. Kinda like a bandaid, but sealed around the full perimeter.

[lr172]

I used simple foil tape on the lower cowl interior to reflect heat on my 6A. In close vicinity to the exhaust pipes themselves I used the heat reflective material that I used on the firewall (thermocool, I believe - It is a layer of reflective foil with a layer of fiberglass + adhesive). In other areas, I used a good qualilty (read: thicker than the cheap stuff) aluminum tape. My exhaust gets very close to the cowl and have had no heat related paint issues on my cowl in 500 hours. I extended the foil to cover any area within 6" of linear distance from any exhaust pipe.

Larry

[Bill.Peyton]

ACS adhesive backed insulation



[IMG]photo 1 by Bill Peyton, on Flickr[/IMG]

[bkthomps]

i also highly recommend getting some teflon tape, and lining the sections where the baffling material rubs against the cowl, you will be amazed at the reduced vibrations transmitted to the airframe