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  #11  
Old 11-14-2013, 09:05 PM
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LifeofReiley LifeofReiley is offline
 
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Quote:
Originally Posted by propsync View Post
Any comments on a gasket? That's why I revived the thread.
I used very thin one side stick insulation foam from Home Depot. I thick it was 1/16" thick and 3/8" wide. I put it on the inside on the aluminum... worked very well.
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  #12  
Old 11-14-2013, 09:34 PM
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Good tip, thanks
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  #13  
Old 11-14-2013, 10:23 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Be careful when using a gasket. If you get a nice tight fit without, then add it, the lens can be a lot more prone towards cracking.
If you do use something, make sure it has very low compression resistance.
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  #14  
Old 11-15-2013, 07:54 AM
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LifeofReiley LifeofReiley is offline
 
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also as with any plastic lens... light tight, do not crank down the screws and lock them down, you will crack the lens gasket or no gasket.
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  #15  
Old 12-27-2017, 01:09 PM
mturnerb mturnerb is offline
 
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Reviving an old thread.

I just did the lens on the first of my QB wings - followed instructions to the letter. When I match drilled the lens to wing, I pulled it up very tight to leading edge, but after all the subsequent steps, when I screw lens in there's a 1/16 or so gap at the leading edge - a bit more inboard.

I don't see how this could get better with another part as I have already drilled the wing holes to #27 and dimpled them. I may try deepening the lens material countersinks a bit - but the main question is what would be a good way to seal the edges where there is a gap?

I'm assuming that there's more experience with this now.

Thanks!
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  #16  
Old 12-29-2017, 06:40 AM
Mudfly Mudfly is offline
 
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Originally Posted by mturnerb View Post
Reviving an old thread.

I just did the lens on the first of my QB wings - followed instructions to the letter. When I match drilled the lens to wing, I pulled it up very tight to leading edge, but after all the subsequent steps, when I screw lens in there's a 1/16 or so gap at the leading edge - a bit more inboard.

I don't see how this could get better with another part as I have already drilled the wing holes to #27 and dimpled them. I may try deepening the lens material countersinks a bit - but the main question is what would be a good way to seal the edges where there is a gap?

I'm assuming that there's more experience with this now.

Thanks!
I also ended up with a small gap on on the leading edge lens to skin fit. Like you, I had the lens pulled/pushed as tight as possible when match drilling the skin holes to the lens. At that time the lens fit very tight with no gap. However; after final drilling, countersinking, attaching mounting brackets, and installing, I ended up with the gap. Mine is mostly on the leading edge lower side. Both left and right wings ended up about the same. If I had to do it over again, and I might, I would ensure (thought it was this time) the drill bit is perpendicular to the skin when match drilling (or even angle the bit slightly aft on the lens). Not sure, but if I decide to leave as is, maybe a very small bead of black RTV after paint and final installation might not look too bad.
This is not final installation, and things still need dressed up bit. Also,I used the longer screws for the nutplates as initially called for in the plans. The screw call out has since been changed to shorter lengths so very little threads will be visible.
Still trying to figure out how to post pics, but here goes.
https://photos.app.goo.gl/Kig4IVBJxgwLAFfg2
https://photos.app.goo.gl/KhhSpZNDw30KujIK2
https://photos.app.goo.gl/gLAYN5wjuMAwkY5I3
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  #17  
Old 12-29-2017, 07:25 AM
mturnerb mturnerb is offline
 
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Quote:
Originally Posted by Mudfly View Post
I also ended up with a small gap on on the leading edge lens to skin fit. Like you, I had the lens pulled/pushed as tight as possible when match drilling the skin holes to the lens. At that time the lens fit very tight with no gap. However; after final drilling, countersinking, attaching mounting brackets, and installing, I ended up with the gap. Mine is mostly on the leading edge lower side. Both left and right wings ended up about the same. If I had to do it over again, and I might, I would ensure (thought it was this time) the drill bit is perpendicular to the skin when match drilling (or even angle the bit slightly aft on the lens). Not sure, but if I decide to leave as is, maybe a very small bead of black RTV after paint and final installation might not look too bad.
This is not final installation, and things still need dressed up bit. Also,I used the longer screws for the nutplates as initially called for in the plans. The screw call out has since been changed to shorter lengths so very little threads will be visible.
Still trying to figure out how to post pics, but here goes.
https://photos.app.goo.gl/Kig4IVBJxgwLAFfg2
https://photos.app.goo.gl/KhhSpZNDw30KujIK2
https://photos.app.goo.gl/gLAYN5wjuMAwkY5I3
Pretty much what I was thinking - or some foam tape around the edges so it won't be so hard to remove lens to service lights down the road. I was pretty careful to stay perpendicular when drilling - I had an assistant so plenty of hands. I think it's just the tolerances, ability of screw/dimple/countersink alignment to slip a bit and the inherent shape of the lens "stacking up". I talked to Vic Syracuse about it as well and he suggested some kind of seal around the edge - mentioned Duck Works kits having a seal for this sort of issue. I probably won't think about it much until final install.

Another question - what did you use to adhere backing plates to lens? I initially tried double-sided tape but it has some thickness that allows the nutplates to "sag" against lens when screws are snugged up. What's safe to use on plexi?
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  #18  
Old 12-29-2017, 07:46 AM
John-G John-G is offline
 
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Quote:
Originally Posted by mturnerb View Post
Another question - what did you use to adhere backing plates to lens? I initially tried double-sided tape but it has some thickness that allows the nutplates to "sag" against lens when screws are snugged up. What's safe to use on plexi?
Turner-

You really don't need anything to secure the backing strips to the lens. I used waxed cord to temporarily hold the strips in place while a couple of screws could be installed. Below is a link with photos showing how I installed the lens/backing strips in the wing of a RV-12.
http://www.dogaviation.com/2016/08/l...tion-woes.html

Happy building,
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Last edited by John-G : 12-29-2017 at 08:04 AM.
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  #19  
Old 12-29-2017, 07:59 AM
ShortSnorter ShortSnorter is offline
 
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Quote:
Originally Posted by John-G View Post
Turner-

You really don't need anything to secure the backing strips to the lens. I used waxed cord to temporarily hold the strips in place while a couple of screws could be installed. Below is a link with photos on how I installed mine.
http://www.dogaviation.com/2016/08/l...tion-woes.html

Happy building,

The string idea is pretty slick. I had the same issue with the double sided tape, so I just ended up holding it in place with my fingers until I got two screws started.
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  #20  
Old 12-29-2017, 12:05 PM
mturnerb mturnerb is offline
 
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Quote:
Originally Posted by John-G View Post
Turner-

You really don't need anything to secure the backing strips to the lens. I used waxed cord to temporarily hold the strips in place while a couple of screws could be installed. Below is a link with photos showing how I installed the lens/backing strips in the wing of a RV-12.
http://www.dogaviation.com/2016/08/l...tion-woes.html

Happy building,
Thanks for this! Great idea!
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