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dlm34077(at)gmail.com
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 Posted: Tue May 23, 2017 6:13 am Post subject: cowl heat protection |
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I used a silicon backed layer of fiberglass mat; after 1000 hr. it was OK; no apparent delamination. From last June to April 2017, I found three areas of delamination and had to replace multi layers both sides of the Nomex core. Unfortunately last June, I let an FBO do some work and unknown to me, the baffling was not correctly reinstalled and sealed; it is unknown whether this contributed to the delamination. The cowl has been fixed except for the new heat protection. What are other builders using? what are your results? My plan now is to use the reflective aluminum adhesive back material for the areas near (less than 3") the exhaust system. Selected areas will also have Fiberfrax beneath the reflective foil. Per the heat document from Vans, I will not be wrapping selected exhaust system areas, although an IA friend says that turbine exhaust systems are routinely wrapped. Any suggestions other than NEVER LET ANYONE ELSE TOUCH.
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jump2(at)sbcglobal.net
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| Posted: Tue May 23, 2017 1:34 pm Post subject: cowl heat protection |
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I have reflective aluminum on inside cowl, no problems just shy of 1000 hrs. I did paint inside of cowling so it had a good base to adhere to.
Patrick Thyssen
Sent from my iPad
| Quote: | On May 23, 2017, at 9:13 AM, dlm <dlm34077(at)gmail.com> wrote:
I used a silicon backed layer of fiberglass mat; after 1000 hr. it was OK; no apparent delamination. From last June to April 2017, I found three areas of delamination and had to replace multi layers both sides of the Nomex core. Unfortunately last June, I let an FBO do some work and unknown to me, the baffling was not correctly reinstalled and sealed; it is unknown whether this contributed to the delamination. The cowl has been fixed except for the new heat protection. What are other builders using? what are your results? My plan now is to use the reflective aluminum adhesive back material for the areas near (less than 3") the exhaust system. Selected areas will also have Fiberfrax beneath the reflective foil. Per the heat document from Vans, I will not be wrapping selected exhaust system areas, although an IA friend says that turbine exhaust systems are routinely wrapped. Any suggestions other than NEVER LET ANYONE ELSE TOUCH.
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bill.peyton
Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO
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| Posted: Wed May 24, 2017 4:36 am Post subject: Re: cowl heat protection |
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I used the adhesive reflective stuff you can purchase from ACS. 600 hours and no issues. Photo below
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Bill
WA0SYV
Aviation Partners, LLC |
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nukeflyboy
Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX
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| Posted: Wed May 24, 2017 4:45 am Post subject: Re: cowl heat protection |
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I did the same as Patrick and it works well after 550 hours. The coverage needs to be fairly extensive. I also have a bolt-on heat shield where the exhaust pipe passes close to the cowl.
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Dave Moore
RV-6 built and sold
RV-10 built and flying |
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schmoboy
Joined: 26 Feb 2006
Posts: 130
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| Posted: Wed May 24, 2017 4:59 am Post subject: cowl heat protection |
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In addition to the reflective foil I painted the inside of the cowl with
a few coats of white high-temp grill paint available at your local home
store. I don't have a 1000 hours of testing, but so far no issues.
-Sean #40303
| Quote: | dlm <mailto:dlm34077(at)gmail.com>
May 23, 2017 at 9:13 AM
I used a silicon backed layer of fiberglass mat; after 1000 hr. it was
OK; no apparent delamination. From last June to April 2017, I found
three areas of delamination and had to replace multi layers both sides
of the Nomex core. Unfortunately last June, I let an FBO do some work
and unknown to me, the baffling was not correctly reinstalled and
sealed; it is unknown whether this contributed to the delamination.
The cowl has been fixed except for the new heat protection. What are
other builders using? what are your results? My plan now is to use the
reflective aluminum adhesive back material for the areas near (less
than 3") the exhaust system. Selected areas will also have Fiberfrax
beneath the reflective foil. Per the heat document from Vans, I will
not be wrapping selected exhaust system areas, although an IA friend
says that turbine exhaust systems are routinely wrapped. Any
suggestions other than NEVER LET ANYONE ELSE TOUCH.
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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