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1. 07:46 AM - Re: (no subject) (Dennis Turner)
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--> FEWMustang-List message posted by: "Dennis Turner" <dennis.turner@rmci.net>
Ken,
The travel on the cylinder is greater than you need. That assures there is
sufficient travel to raise the gear in every case, since the installation
WILL vary slightly from plane to plane. The spacer goes on the cylinder rod
to limit the travel to what is needed. My spacers were about a half inch
thick (see last paragraph for why).
Once I had the gear installed in the wing I adjusted the rod end bearing to
the length necessary to position the gear in the down and locked position
when the cylinder rod is fully retracted. Then, I pushed the gear to the up
and locked position. I carefully disconnected the actuator and measured how
much more rod travel there was by pulling the rod out to the end. I then
took a piece of aluminum bar stock and cut a piece slightly larger than that
distance. I think it was 3/4" stock, but I'm not sure and it doesn't matter
as long as it is larger than the push rod and smaller than the inside of the
cylinder body. Drill a hole the size of the push rod through the center of
the cut pieces and you have your spacer. Then it's install, test, grind
down and repeat until you have the right size. I installed a set screw in
my spacers, but I'm not sure it is necessary since they are considerably
smaller then the cylinder diameter and therefore, even if floating free will
slide to the end as the push rod extends. If your setup doesn't require a
thick spacer, so much the better. Some people have used thin spacers and
glued or epoxied them to the back of the rod end (where the cylinder washer
separates the upside from the downside).
One other consideration for those who haven't installed the actuator anchor
point. When you are putting the actuator in, the length the rod end bearing
sticks out at the end of the rod is important. If you put the rod end
bearing too far into the rod, the lock nut will hit the mechanism on the
landing gear. So, if you haven't positioned the aluminum anchors, you
should put the rod in just enough to assure won't hit the lever arms on the
landing gear axle and then, with the cylinder installed, fully retracted,
and the gear down, position the anchors.
Hope this clears up the spacer issue.
Dennis
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