mcculleyja(at)starpower.n
Guest
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 Posted: Sat Jun 20, 2009 5:22 pm Post subject: nose wheel shimmy and other tire balance issues - balancing |
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Vince,
My following comments are based entirely on personal experience over
many years and numerous aircraft, during which the results were
consistent in every case!
The static balancing I do is on a set of knife-edge level tracks upon
which I place the wheel assembly (with it's bearings installed) onto a
shaft of the same diameter as the aircraft's wheel axle.
The shaft is longer than the distance between the knife edges so that
each end of the shaft extends a couple of inches beyond to assure the
shaft and wheel assembly will not accidentally fall off the tracks.
The assembly is allowed to find its heavy spot by oscillating back and
forth until it eventually comes to rest. The topmost point on the wheel
rim is then marked and one or more 1/4 ounce sticky back weights
available from most any tire shop or commercial wheel balancing facility
are applied to the inside surface of the rim at that point. When
possible, I put weights on both sides of the rim opposite each other to
also maintain balance laterally. Repeat this process until the wheel
will stay stationary at any rotational position you turn it to. The 1/4
ounce weights can also be cut in half, or smaller, if needed to achieve
perfect balance.
My experience has been that all wheel vibration and/or alleged shimmy
problems are simply out of balance tires/tubes and if carefully and
inexpensively balanced as described above, the problem disappears until
the next set of tires/tubes are mounted. By balancing new tire/wheel
assemblies before mounting them on the airplane you can then forget
about having problems for the natural life of the rubber.
P.S. Some brands of tires are much better in balance than others when new!!
Jim McCulley
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Frazier, Vincent A wrote:
| Quote: | SNIP Subject: Re: Nose wheel pant vertical oscillation ((SNIP))
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| Quote: | If anyone out there has REAL experience with these beads, please report back.
Not to start a war, but please spare us the "I heard...." or "IMHO, the beads are...." comments.
Those only muddy the waters.>
|
| Quote: | Has anyone actually used this product and did it help?>
Vince ((SNIP))
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