[NSRCA-discussion] Eclipse wing attachment

[J N Hiller]

I place the 4-40 socket head cap screw near the end of the tube where I add
a hardwood plug to add thread length. As the threads wear and loosen a drop
of CA renews the friction fit. The other thing I do is wrap single strip of
cellophane tape around the tube where it exits the fuselage and enters the
wing root to remove excess clearance, half in the fuselage and half in the
wing. As the tape wares it is replaced and the amount needed needs to be
reduced as the temperature increases in mid summer. Depending on the size
and source I’ve needed from 1/2 to 2 1/2 wraps to snug up the fit. I don’t
like the rattle and the wing panel flopping around even if it’s just a
little bit offends my.
Jim Hiller

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Bob Wilson
Sent: Sunday, March 23, 2008 8:25 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Eclipse wing attachment

Thanks Anthony.  I like the idea of the PVC.
I had a IMAC Lazer shed a wing last year because of a wing bolt coming loose
and I'm a little goosey...it wasn't pretty!


On 3/23/08, Anthony Romano < anthonyr105 at hotmail.com
<mailto:anthonyr105 at hotmail.com> > wrote:
Pretty standard arrangement actually. Not a lot of load on that 4-40 bolt,
the most important thing is that it stays in place. Over time the thread in
the thin wing tube will wear but you can just rotate the tube and re-drill.
Most usually glue a small block of wood or piece of PVC inside the tube to
hold threads or catch a blind nut.
If it makes you feel better you could add a bolt through that leading edge
hole. Just make sure it stays in. Had a nylon 1/4-20 back out of one plane
and the end result was very messy.
 I prefer the bolts in the tube type of set up to avoid having to take the
canopy off every time I assemble/disassemble the airplane.

Anthony




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Date: Sun, 23 Mar 2008 09:39:10 -0500
From: wilsorc at gmail.com <mailto:wilsorc at gmail.com>
To: NSRCA-discussion at lists.nsrca.org
<mailto:NSRCA-discussion at lists.nsrca.org>
Subject: [NSRCA-discussion] Eclipse wing attachment

I just bought a used CA Models "Eclipse" with a YS 140, Hitori pipe etc.
I have a question about the wing attachment.
Each wing half slides onto the aluminum center tube and there is an incident
adjustment peg on the fuse that the trailing edge of each wing fits over.
The aluminum center tube is tapped for a 4-40 bolt about 8 inches out from
the fuse on both sides.  Once the wing halfs are slid onto the tube, theses
4-40 bolts are inserted through the top of the wing.

That's it!  Kind of a cheesey arrangement.

There is a hole in the fuse at the leading edge of the wing and a
corresponcding (plywood reinforced) hole in each wing half.  However, there
isn't any hardware associated with these attachment points.  I think
something is ovbviously missing and would appreciate it if anyone with
"Eclipse" experience could help me out.

Thanks,
Bob Wilson


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