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09-18-2015, 06:36 PM
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Join Date: Nov 2013
Location: Belleville, il
Posts: 124
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I can see light thru the wing tip.
After coating the tip with epoxy and sanding to fill pin holes and smooth ruff edges, I noticed that I can see light where the 2 halves were joined. The fiberglass is visible, but not exposed. Is this normal? I am thinking that it was like that when delivered.
Thanks
__________________
Barney Johnson
14A #140111
started build 12/24/13
Empennage done, wings done, fuselage done, finish kit in progress.
Dormant 2017, 2018,2019
Back at it 3/20
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09-18-2015, 07:28 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,208
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Quote:
Originally Posted by Barneybc12d
After coating the tip with epoxy and sanding to fill pin holes and smooth ruff edges, I noticed that I can see light where the 2 halves were joined. The fiberglass is visible, but not exposed. Is this normal? I am thinking that it was like that when delivered.
Thanks
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Either the gel coat was light in that area or you sanded it away. No problem unless you're not planning to paint, in which case the UV will eventually damage the fiberglass.
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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09-18-2015, 08:04 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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It is normal.
Normal - the tip is made in two halves and then bonded together. There is no gelcoat on the bond line. They are lightly sprayed with some primer, and it does not seem to stick well, so, sand and prime with a good primer before painting.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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09-21-2015, 06:56 AM
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Join Date: Oct 2009
Location: Newark, IL
Posts: 287
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Thin ??
Barney,
Is the fiberglass thin in that area? (Tap with a coin.) If it is thin in the seam area, you could reinforce the inside with a small piece of fiberglass cloth or tape and epoxy. Sand the surface first. It might be a heartbreak if a thin spot becomes a stress crack in the new paint job.
- Roger
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09-21-2015, 07:32 AM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,118
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Mine is the same way, seems to be a good solid bond though.
__________________
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now. 
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09-21-2015, 09:20 AM
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Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,647
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It will probably be a good bond. If you look at fiberglass pieces without gel-coat (wheel pants, gear fairings), you will see that they are translucent. When the gel-coated halves are bonded together, the seam line will be translucent as well. I have not heard of any RVs with glass separating on the seams; mine are flying since 2008 and no problems, even when one touched the ground during my nosewheel incident. A little rash from the contact but no splitting of the seams.
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Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
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