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  #1  
Old 02-06-2016, 10:31 AM
PRE911 PRE911 is offline
 
Join Date: Oct 2012
Location: Novato, Ca
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Default Canopy "peel ply" step

Do I understand correctly that in the final steps of the fiberglass layup, the peel ply layer is applied only to add more resin for a smother finish? Then is the peel ply gently pulled off and discarded?
Thanks in advance,
Rich
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  #2  
Old 02-06-2016, 10:58 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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It is primarily added over the top of the glass layup.
With peal-ply in place, capillary action draws resin up and out of the lay-up which will result in all of the weave of the the top layer of glass cloth being fully saturated with resin. Without the peal-ply, the top layer would not be fully saturated and there would be a lot of the weave texture showing (that would have to be either sanded off or further filled with resin).
The peal-ply is pulled off once the resin has fully cured.

The secondary benefit to using the peal-ply is it results in a surface that is fully ready (no other sanding or prep. necessary) for adding more glass layers or coats of resin if needed.
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  #3  
Old 02-06-2016, 11:22 AM
PRE911 PRE911 is offline
 
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thank you very much for your quick response. That makes it very clear!
Rich
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  #4  
Old 02-07-2016, 03:08 AM
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mike newall mike newall is offline
 
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And don't forget, peel ply is just Dacron - old scraps of Ceconite are just perfect, if you have end rolls of rib tape - better still as already cut up.
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  #5  
Old 02-07-2016, 05:41 AM
Ron B. Ron B. is offline
 
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Quote:
Originally Posted by mike newall View Post
And don't forget, peel ply is just Dacron - old scraps of Ceconite are just perfect, if you have end rolls of rib tape - better still as already cut up.
For those new to aircraft building, these products are used on fabric covered aircraft, so perhaps your buddy might have leftovers if he built a fabric covered plane.
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  #6  
Old 02-07-2016, 10:35 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by mike newall View Post
And don't forget, peel ply is just Dacron - old scraps of Ceconite are just perfect, if you have end rolls of rib tape - better still as already cut up.
Quote:
Originally Posted by Ron B. View Post
For those new to aircraft building, these products are used on fabric covered aircraft, so perhaps your buddy might have leftovers if he built a fabric covered plane.
Good tip
It is also mentioned in the RV-14 supplemental videos.
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  #7  
Old 08-10-2017, 07:33 PM
doug_rv7 doug_rv7 is offline
 
Join Date: May 2005
Location: Lincoln, NE
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Default Excellent Videos

Quote:
Originally Posted by rvbuilder2002 View Post
Good tip
It is also mentioned in the RV-14 supplemental videos.
Scott,

These videos are excellent. Thanks for putting these together. I'm preparing to do this on my 7. I'm going to lean on these quite heavily.

Also, nice presentation @ OSH17.


Doug
RV-7
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