http://www1.mscdirect.com/cgi/nnsrhm it'll be easier to find with the
P/N or exact name.
Wayne, any of these the right one?
http://www1.mscdirect.com/CGI/GSDRVSM?P ... 0135785085
Dave
Wayne G. O'Shea wrote:
I have a couple cases here Ron.. but don't think I can ship an aerosol can
to the USA in the mail anymore...
----- Original Message -----
From: "Ron Shannon" <rshannon@cruzcom.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, April 22, 2010 2:13 AM
Subject: Re: [rebel-builders] control friction
Eric, that may help with the right control column (elevator) bearing,
where
I have put in floor brackets to make the control column removable, but
friction in the left wing internal torque tube bearings is the main
problem,
and of course, I can't get at them without cutting some significant holes.
It may come to that eventually, but I'll try to get some of the Crown
silicone lube on them, and anything else I can think of, before doing
major
surgery.
I have now measured aileron (roll) friction as follows, in both cases
using
a digital fishing gauge pulling at the top of the (shortened) stick with
no
grip, at approx. 12.5" above the stick pivot:
1) With both wings disconnected at the wing root torque tube horns,
friction
in just the inside torque tube setup averages roughly 1 lb. 2 oz., and
increases slightly out near the stops. There is no appreciable friction in
the inside push pull tube bearings or bell cranks, so the great majority
of
that is probably at the hanger bolt and possibly a little in the guide
pin/bolts, which are still inserted in the wings, of course. Not good.
2) With both wings connected via their respective wing root torque tube
horns, the friction averages about 3 lb. 6 oz. for right aileron (left
aileron falling) and about 4 lb. for left aileron (left aileron rising).
These numbers are probably not real precise, but are certainly in the ball
park of repeatable scientific data, and certainly not good. The "squeal"
from the left wing torque tube bearings seems to come randomly from either
or both bearings, though always on the flaperon down motion and none on
the
upward motion.
Again, to repeat, there is no significant friction in the right wing, and
the left wing flaperon hinges are free and quiet when tested alone with
the
flaperon push pull disconnected, so the left flaperon hinges are not
contributing. The left wing torque tube bearings are stiff by themselves,
i.e., when disconnected from the fuse, etc. The spacers at the wing root
horns seem to fit well, so I don't think they are contributing to any
binding by spreading the horns apart or pulling them together out of their
natural positions.
I'm going to proceed incrementally, trying to lube places I can get to
first, like the guide pin bolts and hanger bolt -- to the extent I can get
something in the latter. Suggestions? Then will try to find some of the
Crown silicone lube and find some way(s) to get it to the left wing torque
tube bearings.
Does anyone know where I can get single cans of the Crown silicone lube?
All
I've found so far are 12-can case lots, at $70-80 ea. Thanks.
Ron
254R
On Wed, Apr 21, 2010 at 9:40 PM, Eric Fogelin <elist@whidbey.com> wrote:
-----------------------------------------------------------------Hey Ron.
Try loosening all of the bolts that hold the delrin bearings in place and
let them find their natural location. Study what needs to be done and
shim
using half washers as needed. A couple/few thin shims may take care of
your
problem.
Eric
N645E
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