[NSRCA-discussion] Reparing a de-laminated ARF wing

[rick]

Ed - 

Foam-safe CA (to get around the setup time of epoxy or poly-u glue  through
a flattened drinking straw as opposed to a metal tube? 

 

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ed Alt
Sent: Saturday, December 30, 2006 8:55 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Reparing a de-laminated ARF wing

 

John:

Thanks for the tips.  Actually, it's not a botched repair, it's an ARF wing
that came this way.  I agree about the poly-U pressure being a potential
problem.  It would require having the original shucks or something close to
it.  Maybe it would work with some other foam shucks and placing a towel or
something in between to fill the shape mismatch?

 

Ed

----- Original Message ----- 

From: John <mailto:johnferrell at earthlink.net>  Ferrell 

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Saturday, December 30, 2006 3:47 PM

Subject: Re: [NSRCA-discussion] Reparing a de-laminated ARF wing

 

I would be inclined to slit it open whatever it takes and pump some
laminating epoxy in through a flattened brass tube. The poly adhesive might
generate enough pressure to make the condition worse. An ear syringe will
generate the pressure to load/unload the tube. 

 

A CA repair in the area or over zealous cleaning (brake cleaner?) sometimes
dissolves underlying foam. I hope this is not the case!

 

John Ferrell    W8CCW
"My Competition is not my enemy"
http://DixieNC.US

----- Original Message ----- 

From: Ed Alt <mailto:ed_alt at hotmail.com>  

To: nsrca-discussion at lists.nsrca.org 

Sent: Saturday, December 30, 2006 3:27 PM

Subject: [NSRCA-discussion] Reparing a de-laminated ARF wing

 

I'm looking for a good method for repairing an area of of sheeted foam wing
where it is not fully adhering, roughly 30 sq" in area.  Current thoughts
are to try to inject some polyurethane glue just under the surface, maybe a
laminating epoxy instead.  The tough part seems to be how to get sufficient
coverage right under the skin without going too deep.  The wing is already
covered and I'm thinking that one method might be to use a suction cup and
gently pull the skin away to assure a gap so that a needle would get the
glue in between.  Any thoughts on this?

 

Thanks

 

Ed 


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