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  #1  
Old 08-19-2021, 11:51 AM
Wingit Wingit is offline
 
Join Date: Oct 2019
Location: Miranda,Ca
Posts: 56
Default Apply cowling heat sheild

I have googled this but not much info. I am looking for best way to lay out and cut pieces of heat shield to apply to cowl. Thank you

Dave
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  #2  
Old 08-19-2021, 12:33 PM
MED MED is offline
 
Join Date: Jul 2015
Location: Aiken, SC
Posts: 803
Default

Heat shield material comes as part of the kit, with instructions for installation. It has worked well for me at 200 hours, so far. My only deviation from the plans was based on the recommendation of an early 14 builder: Cut the shield material about 1 inch larger than specified in the plans. YMMV
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  #3  
Old 08-19-2021, 12:44 PM
Wingit Wingit is offline
 
Join Date: Oct 2019
Location: Miranda,Ca
Posts: 56
Default Heat shield

The plans show a few dimensions and a picture of a completed cowl with shield applied. How many pieces did you apply to cover area shown.

Thanks for your reply and any other info.

Dave
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  #4  
Old 08-19-2021, 12:58 PM
MED MED is offline
 
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Location: Aiken, SC
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I donít seem to have any photos of the bottom cowling, and it has been too long for me to remember clearly. I can take a photo the next time I have the bottom cowling off, if noone else can help. I donít recall it being any problem using the plan directions, however. Sorry.
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  #5  
Old 08-19-2021, 02:00 PM
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Join Date: Feb 2005
Location: LSGY
Posts: 4,093
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Not a -14, but on my -8 I added more shielding to the exhaust system where it looked like it was getting the cowl hot. It is holding up well.

http://www.rv8.ch/heat-shield-home-made/
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  #6  
Old 08-19-2021, 02:05 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
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I added 1/16" think fiberfrax under the aluminum sheet VANS provide and the results has been amazing. My entire bottom cowl was covered and after shut down you could touch it and feel hardly any warmth whereas the top cowl would be too hot to handle.
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  #7  
Old 08-19-2021, 04:44 PM
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Carl Froehlich Carl Froehlich is online now
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 3,148
Default

Quote:
Originally Posted by Bavafa View Post
I added 1/16" think fiberfrax under the aluminum sheet VANS provide and the results has been amazing. My entire bottom cowl was covered and after shut down you could touch it and feel hardly any warmth whereas the top cowl would be too hot to handle.
+1, except I used 1/8Ē Fiberfrax in the areas near the exhaust pipes.
Carl
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  #8  
Old 08-20-2021, 01:35 AM
SteveHicks SteveHicks is offline
 
Join Date: Sep 2017
Location: Shropshire, UK
Posts: 16
Default Fiberfrax

Which Fiberfrax product did you use please Ö they manufacture several?
https://www.unifrax.com/en-uk/produc...ctcategory=266

Thanks
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  #9  
Old 08-20-2021, 06:12 AM
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DanH DanH is online now
 
Join Date: Oct 2005
Location: 08A
Posts: 10,228
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Quote:
Originally Posted by SteveHicks View Post
Which Fiberfrax product did you use please Ö they manufacture several?
https://www.aircraftspruce.com/catal.../fiberfrax.php

1/16" is plenty for this application, and you need only shadow the pipes. The aluminum foil's adhesive sticks to finish paint far better than to other substrates....epoxy primer, two part single stage topcoat.
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  #10  
Old 08-20-2021, 06:33 AM
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F1Boss F1Boss is offline
 
Join Date: Aug 2006
Location: Taylor Texas
Posts: 846
Default This MIGHT work?

I ran a search on heat vs fiberglass. Seems the car guys use various spray/roll/brush methods to put down various products that reduce noise and heat. I ordered enough of one product that will cover at least 2 cowlings, so I rolled on 2 layers of the stuff on my top cowl to see if did it work. I have been kept on the ground (rain) so I have not yet tested this stuff. I will say it sure does apply easily with a 4Ē roller, and smells like latex house paint.

Iíll have a report for you when I can get off the ground!

The bottom cowl is covered like Danís with a peel n stick heat resistant product from one of the car suppliers, so it is doing fine. If this other stuff sticks and reduces the heat on the top, Iíll roll on some of it where the fiberglass is bare on the bottom cowl. Maybe this product will help with keeping the inside of the cowl a bit cleaner...
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