[NSRCA-discussion] Wing tube phenolic repair "help"

[Joe Dunnaway]

Anthony,
  It sounds like they didn't install a false rib out at the end of the
tube....  The foam is breaking up and there is no support for the wing tube.
You are correct about installing a rib.   A lot of the guys flying Impulses
had the same problem.  The wing was built without a rib to hold the wing
tube.  The fix is exactly what you describe below.   Cut a slot in the
bottom of the wing and install a rib.
 
Joe Dunnaway
 
 
   _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Anthony
Abdullah
Sent: Friday, August 11, 2006 8:23 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Wing tube phenolic repair "help"


I am unfamiliar with that adhesive, what is the brand name and where would I
get it. This sounds a lot simpler than what I was planning. Will that glue
run into whatever empty spots there are in there? Will it not pool up into
clumps and just glue the small area at the point of injestion? What do I
clean it up with?
 
I was thinking about a rib installed from the bottom. I thought I might cut
a slot in the sheeting and through the foam about two inches in from the
outboard tip of the phenolic. I could clean the slot up with my soldering
iron and make it real straight and uniform. Then I was going to cut an
airfoil shaped rib and glue it into the slot. A little light filler, some
sanding and some monokote and it should be as good as new. 
 
What do you guys think about that idea? Do you think it will be strong and
light enough? It is certainly more labor intensive and time consuming, but
my goal is peace of mind. I don't want to worry about my wing folding every
time I pull a square manuever or perform a snap roll.   
 
Thanks again for your help!
Anthony

Ed Alt <ed_alt at hotmail.com> wrote:

It's best to use the polyurethane glue as Bob recommended.  It's going to
expand to fill the void and it's going to be alot lighter than epoxy.  I've
done this repair successfully on 35% gas stuff and it really holds up well.
The only downside is that it's messy.  You have to either mop up affter it
while it is catalyzing and oozing out of the holes, or else shave it off a
razor later on. I think it's easier to mop & lightly sand when cured.  
 
Ed

----- Original Message ----- 
From: HYPERLINK "mailto:lightfoot at sc.rr.com"Jay Marshall 
To: HYPERLINK "mailto:nsrca-discussion at lists.nsrca.org"'NSRCA Mailing List' 
Sent: Friday, August 11, 2006 6:48 AM
Subject: Re: [NSRCA-discussion] Wing tube phenolic repair "help"

How about a hypo and some epoxy?
 
-----Original Message-----
From: HYPERLINK
"mailto:nsrca-discussion-bounces at lists.nsrca.org"nsrca-discussion-bounces at li
sts.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of
Anthony Abdullah
Sent: Thursday, August 10, 2006 10:43 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Wing tube phenolic repair "help"
 
I was just about finished setting up my Odyssey when I noticed that the wing
seemed a little loose. If I hold the fuselage the right wing panel can
wiggle up and down a noticable amount. I thought that maybe the tube mount
at the fuse was loose but that was not the case. As it turns out, the
phenolic in my completed wing is loose about 3/4 of the way down and is
wiggling around. It almost feels like the foam in the sheeted foam core wing
has been somehow dislodged and the phenolic is in just a hollow cavern
instead of solidly glued to the wing. It is still glued solid at the root so
it won't slide out, but it obviously can not be flown in that condition.
 
Question:
How do I go about repairing the foam that the phenolic mounts to? The wing
is sheeted, covered, and trimmed (complete) and I would like to keep from
having to start all over again. Getting out the old one will also be an
issue as it is still partially glued in. 
 
I am open to any and all suggestions.
 
Thanks in advance
Anthony   
   _____  

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