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05-15-2020, 03:16 AM
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Join Date: Jul 2013
Location: Clarkston, MI
Posts: 912
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Todays Top Tip: Sealing Cowl Heat Barrier
I'm sure others have tried this, but I wanted to share my positive experience.
Yesterday I spent seven hours cutting and applying the aluminized heat barrier recommended for the interior of the bottom cowl, which I bought from Aircraft Spruce. It is recommended that the seams and edges be sealed with high temp RTV, but before I did I conducted some tests using aluminum tape. The results were promising, so I went ahead and sealed all the seams and edges with the aluminum tape. I used a plastic roller (bought for fiberglass layups, but never used for that purpose) to firmly press the barrier material onto the epoxy layer applied to the raw interior the day before. When I used the roller to also apply the aluminum tape, it worked perfectly to bond the tape and blend it into the panels. I'm hoping the glue on the aluminum tape will hold up to the heat exposure; it is designed for HVAC applications so it should. In any case, the results are far better than expected. It's been awhile since I had a genuine "Yee Hah" moment in the shop... but this was one of them.
(Darn it... Google Photos is acting up again... my shared folder isn't sharing any more. Working on the problem)
Last edited by goatflieg : 05-15-2020 at 03:18 AM.
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05-15-2020, 03:36 AM
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Join Date: Jul 2013
Location: Clarkston, MI
Posts: 912
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https://lh3.googleusercontent.com/pw...-no?authuser=0
https://lh3.googleusercontent.com/pw...-no?authuser=0
OK, so it seems my shared folder settings are all correct, but when I use the "share photo" icon above, it instead shares a link to the photo. The links work for me, but I need to know if they work for anyone else. Also wondering why they don't pop up as the image like they used to. Doug, if you have any suggestions, please advise.
Last edited by goatflieg : 05-15-2020 at 03:39 AM.
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05-15-2020, 04:35 AM
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Join Date: May 2010
Location: Burlington On. Ca
Posts: 189
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Photos
I can see your photos fine. The results of your work look very professional. Good job.
__________________
Al Grant
Flying RV6, O-320, 160hp
Burlington, On
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05-15-2020, 05:59 AM
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Join Date: Jan 2005
Location: Charlottesville, Virginia
Posts: 1,298
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awesome work.......
__________________
Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1200+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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05-15-2020, 11:21 AM
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Join Date: Oct 2006
Location: torrance, ca
Posts: 782
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05-15-2020, 12:02 PM
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Join Date: Jan 2005
Posts: 4,688
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I think it looks great and should last a long time, heat, fluids will take a toll over time but I see this lasting a long time. We shall see. Nice work.
__________________
George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767
2021 Dues Paid
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05-15-2020, 12:58 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,982
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Beautiful job! One word of warning for folks doing this in the future however - there is a huge difference in quality in aluminum tapes. I did this to myRV-8 when it was new, and the tape eventually started peeling off, and I had to do it over. It’s enough work, doing a whole cowl, to make it worthwhile to check the specs on the tape you’’re going to use so to make sure its good for a couple hundred degrees.
Paul
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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05-15-2020, 01:14 PM
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Join Date: Feb 2011
Location: Dallas Ft Worth
Posts: 115
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That looks great. Thanks for the tip.
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05-15-2020, 01:22 PM
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Join Date: Jul 2017
Location: San Jose, CA
Posts: 326
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Any reason not to do the entire surface in HVAC tape only?
In fact, why not high-build prime and sand flat, then tape only?
It seems to me a shiny flat aluminum surface would retain less heat than the serrated one that reflects onto itself.
__________________
Dan V
'91 Zodiac 2013-2020 retired
RV-14A wiring
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05-15-2020, 02:52 PM
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Join Date: Oct 2011
Location: Québec, CNV9
Posts: 538
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Very nice job and good looking !!!
What part # from Spruce did you use and can you say what quantity was necessary? They offer different aluminised heat barriers...
Thanks
__________________
Eric,
2022 =VAF= paid
RV-8 SB #83274
Grove Airfoiled Gear, Wheels & Brakes
VPX-Pro, EFII System 32, EarthX batteries
Aerosport IO-375, MTV-9-B/183
Skyview HDX
C-GEMQ, RV-8, "Dragonfly", flying
C-GNFJ, C72R Cutlass, flying
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