I installed my wings around 3 months ago. In my case, maybe luck, I had no need
for reaming or do I need tapered pins to install the wings now. I need to
clarify
that as the former owner of a couple fo gliders I have plenty of experience
assembling the wings on these kind of planes so I have a feel for moving wings
and wiggling them to achieve proper alignment before I drive the pins in.
I use saw horses when installing the wings. In the case of my Europa, minute
adjustments of the wings (up, down, fwd and aft) will result in either perfectly
aligned bushings or pins that will not go in. I don't force if the pins don't
go in, I re-adjust the wings and try again. But I do know my pins will go in
easely if things are set properly so I just adjust until pins go in.
The reason I attribute the proper bushing alignment in my plane is that I didn't
follow the manual when it came to cockpit module bushing installation. I waited
until the wings where being fitted to the fuselage. Not easy to do and required
some custom made tools to make it happen. I am not advocating not following
the manual but I found that the way the manual told you to bond these bushings
so early in the build and then expect them to align at the end made no sense.
My wings mated perfectly when rigged outside the airplane so I figured that
all I had to do was make sure those CM bushings were not out of alignment at
the end.
BTW, I used a bubble level used for leveling machine shop machines which are
ridiculously
accurate for setting the wings incidence (what fun did I have, it drove
me crazy!!). Also, and this may be contrary to some advice, I was more concerned
about incidence than sweep. That doesn't mean I didn't got sweep very
close, but I didn't force the wings to have perfect sweep (I think I got within
.05" - .1"). My reasoning here was that if you force the wings to have a perfect
sweep before setting the lift pins, when taken apart they will never want
to go in smooth and easy again. So my rule during lift pin setup was to not
force
the wings fore and aft too much so as to prevent throwing the spar bushings
out of alignment.
If interested, go to my build site
(https://myeaa.org/?myproject&proj=7S3RojQBL&cat=wings&listcat=)
and scroll down until you find the entry about bonding the
CM bushings. The entries in this log are not intended to be assembly
instructions
so I don't know how clear it will be. If you have questions ask but I would
never override anything Bud instructs (he has been my mentor for this build
and an invaluable resource). I still have to fly this plane to find out if these
stuff I did will result in a nice flying plane so don't trust anything I
say :)
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490815#490815
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