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goodings(at)yorku.ca
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 Posted: Tue Dec 18, 2007 8:42 am Post subject: 601HD Tires |
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We would strongly endorse using the Michelin S83 motor scooter tires for
the 601HD (size 3.5 x 8.0). They fit the Matco rims with no trouble. Of
course, use a tube with an angled valve stem. We originally installed the
4.0 x 8.0 (wheelbarrow??? low-speed trailer???) tires which came from
Zenith. They showed bad wear after just a few landings (the tread was
worn off in many places), and were a source of worry after about 50 hours
(perhaps 200 landings). The Michelins were put on at about 80 hours.
They show no sign of wear at 130 hours (another 50 hours, probably another
200 landings). We run them at about 28 psi. (Some people run 601 tires
at much lower pressure. Having seen a 601 "incident" where the
low-pressure tire slipped on the rim, and sheared off the valve stem, we
do NOT endorse the low-pressure approach.) After installation, put
silicone sealant around the valve stem at the rim; the valve holes in the
Matco rims are oversize, and it seems a good idea to keep dirt out. The
Michelins are more expensive. Tires are one area where we don't scrimp;
tire failure on landing can get you and your aircraft into big trouble
very quickly!
John and Peter Goodings, C-FGPJ, CH601HD with R912S, Ottawa/Carp, Toronto.
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klaus(at)utdallas.edu
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| Posted: Tue Dec 18, 2007 11:42 am Post subject: 601HD Tires |
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We have used the Michelin S83 tires on the main wheels
for two years. After 200 hrs, they show virtually no wear.
The wheel barrow tires are a BAD idea.
We had such a tire fail on a trip to the West Coast when it was
punctured by grass burrs (!)
A good decision is to get the inner tube for the S83 made
by Michelin. That inner tube is balanced, by having
a bit more rubber opposite the stem. As a result, the wheels spin up
on takeoff without any vibration whatsoever.
On the nose gear, we use a smaller Honda moped tire made by
Bridgestone, since the weight
on the nose gear is only about 200 lbs and remains virtually unchanged,
indeed is reduced a bit, when the plane is loaded to gross weight.
Unfortunately, the inner tube for that tire is not balanced and we
use a balancing weight opposite the stem. Thus, the wheel also
spins up without any vibration whatsoever.
As for air pressure, we are using 30-35 lbs. On earlier tires, we once
had a blowout when the tire rotated on the rim while braking.
It sheared of the stem and was something I do not want to experience
again. This happened when we used a bit of soapy liquid on the rim to make
mounting of the tires easier, just as they do for mounting auto tires.
This is a bad idea, and we now use at most a bit of water.
Happy flying,
Klaus
--
Klaus Truemper
Professor Emeritus of Computer Science
University of Texas at Dallas
Erik Jonsson School of Engineering and
Computer Science EC31
P.O. Box 830688
Richardson, TX 75083-0688
(972) 883-2712
klaus(at)utdallas.edu
www.utdallas.edu/~klaus
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