When I have help with the rigging then it is quite easy to locate the pins
in my case=2C although the glider wings are quite a handful or two. But on
my own it is more difficult. A couple of years ago I inherited a tapered 1/
2 inch pin from an aircraft engineer and that works just fine. I tap it in
carefully with a plastic hammer=2C and can then insert the pip pin into the
other hole with ease. I don't now where one would buy such a tool.
Karl
From: budyerly@msn.com
Subject: Re: Europa-List: Main wing bushings
Date: Mon=2C 17 Jan 2011 21:39:04 -0500
Will=2C and others=2C
The play is because the black pins are undersized about .007 I think.
The main pip pin is about .499 so only a tiny amount of play is available.
Normally=2C the oversized bushes allow what appears to be
excessive play when the wings are not rigged. When the
plane is rigged=2C those sloppy bushes get hard to align unless you were su
perman
during the cockpit module build up and got the fuselage and wing bushes
just perfect. I only have two aircraft that align so well=2C the wing
pins slide in easily=2C but that is only at 85 degrees and with the tips he
ld just
right. Hotter or colder=2C or with an untrained assistant=2C it is
tougher to push the pins in. So what to do?
Since none of us is superman=2C I many times have re-aligned the bushes on
final wing rigging by heating my spare tapered black pin until just too hot
to touch=2C but not sizzle (180F)=2C and ram it home. Let it set
overnight and the three bushes get aligned. Once in a while=2C I do
have to put my 1/2 inch reamer into the pilot side hole and knock a
thousandth off for a nice hand fit of the pip pin because of the tighter
tolerances.
Note: There is a good reason for using the pip pin when doing spar
alignment=2C especially on the glider wing retrofit. Unfortunately we don'
t
have the luxury of setting our own bushes with the short
wings. If we follow the instructions blindly and use just the bolts=2C
you won't quite get perfect alignment. So just heat the pin and help the
bushes align.
Please do not overheat your existing wing pin and destroy the heat
treating. At 6 Gs=2C you would not believe the shear load on that pin.
So don't rip everything out just yet=2C try a bit of heat and patience.
It's worth it.
Regards=2C
Bud Yerly
----- Original Message -----
From: William Daniell
To: europa-list@matronics.com
Sent: Monday=2C January 17=2C 2011 8:19
AM
Subject: Europa-List: Main wing
bushings
For
the assembled wisdom
I
have a little slop in the main spar pins when I put them into each bushin
g
separately - "a little slop" means when I wiggle the spar pins the ends m
ove
about 1/32.
There
is no slop when the whole thing is assembled and the pins are a light pus
h
fit.
Is
this normal?
Will
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