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#1
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Inner Tubes
I understand there is a new class of inner tubes that do not leak as
severely as the old "TSO'd crap" natural rubber that we've used since Wilbur put them on the Flyer. Anybody got a lead on who has them for relatively few AMUs for common sizes like 600-6 and so on? Jim |
#2
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Inner Tubes
RST Engineering wrote:
I understand there is a new class of inner tubes that do not leak as severely as the old "TSO'd crap" natural rubber that we've used since Wilbur put them on the Flyer. Anybody got a lead on who has them for relatively few AMUs for common sizes like 600-6 and so on? Jim Michelin sells them as AirStop tubes. Chief Aircraft carries them. Rip |
#3
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Inner Tubes
"Rip" wrote in message . .. RST Engineering wrote: I understand there is a new class of inner tubes that do not leak as severely as the old "TSO'd crap" natural rubber that we've used since Wilbur put them on the Flyer. Anybody got a lead on who has them for relatively few AMUs for common sizes like 600-6 and so on? Jim Michelin sells them as AirStop tubes. Chief Aircraft carries them. Rip And they are not cheap. I believe Goodyear has come out with a version too. Desser carries both brands. IIRC, my 5" x 5" airstop tubes were $30+ each. New tires were $50/ea. It hurt paying almost as much for the tubes as the tires. Still, only having to air the tires 3 or 4 times a year is nice. KB KB |
#4
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Inner Tubes
Where else but in aviation do you have to pay extra to get inner tubes that
don't leak? You gotta love it. -Mike "Kyle Boatright" wrote: .... And they are not cheap. I believe Goodyear has come out with a version too. Desser carries both brands. IIRC, my 5" x 5" airstop tubes were $30+ each. New tires were $50/ea. It hurt paying almost as much for the tubes as the tires. Still, only having to air the tires 3 or 4 times a year is nice. KB |
#5
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Inner Tubes
In article ,
Mike Murdock wrote: Where else but in aviation do you have to pay extra to get inner tubes that don't leak? You gotta love it. Bicycling has the same issue. I lose ~40psi a week out of the tires on my bike. Of course, I'm starting at a much higher pressure. The tires on my road bike have a recommended pressure of 100psi. I have upgraded tubes for when I need to replace the existing ones, but it is easy enough to add air that it isn't worth trashing good but leaky tubes. John -- John Clear - http://www.clear-prop.org/ |
#6
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Inner Tubes
Mike Murdock wrote:
Where else but in aviation do you have to pay extra to get inner tubes that don't leak? You gotta love it. My understanding is that there is an actual technical issue. The kind of rubber (butyl?) tubes that don't leak are difficult to make in small tire sizes with small radius of curvature. Dave -Mike "Kyle Boatright" wrote: ... And they are not cheap. I believe Goodyear has come out with a version too. Desser carries both brands. IIRC, my 5" x 5" airstop tubes were $30+ each. New tires were $50/ea. It hurt paying almost as much for the tubes as the tires. Still, only having to air the tires 3 or 4 times a year is nice. KB |
#7
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Inner Tubes
Dave, Your on the right track Dave. I hold patents on inner tube joining machinery and as you say there is a difficulty in using a regular joining machine at the smaller sizes. Butyl inner tubes have been around since 1970. An inner tube is made from a straight length of "tube" and then joined end to end in a "joining machine" Semperit Tyres produced and licensed the first joining machines that were successful on butyl. Goodyear Tire [licensed by Semperit] was supplying "airstop" tubes through the 1970's. Butyl is a oil product and significantly lower in cost than natural rubber. However, natural rubber "joins" much more easily than butyl and therefore remained the tube to use for the aviation industry. And of course being for aviation, butyl tires are now sold at a premium, but are most definitely lower cost to make because of lower raw material cost. Roy Piper Archer - N5804F "Dave Butler" wrote in message ... Mike Murdock wrote: Where else but in aviation do you have to pay extra to get inner tubes that don't leak? You gotta love it. My understanding is that there is an actual technical issue. The kind of rubber (butyl?) tubes that don't leak are difficult to make in small tire sizes with small radius of curvature. Dave -Mike "Kyle Boatright" wrote: ... And they are not cheap. I believe Goodyear has come out with a version too. Desser carries both brands. IIRC, my 5" x 5" airstop tubes were $30+ each. New tires were $50/ea. It hurt paying almost as much for the tubes as the tires. Still, only having to air the tires 3 or 4 times a year is nice. KB |
#8
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Inner Tubes
I can confirm that both the Mich. Airstops are top notch. We've had
Airstops in our Aztec for several years, they go month after month , even in the winter, without loosing a single lb of pressure. I just helped install Goodyear Flight Mate Butyl tubes in a new set of Flight Custom III's on a Piper Lance, I'll stay in touch with the owners. Desser is good source for each. Jim "RST Engineering" wrote in message ... I understand there is a new class of inner tubes that do not leak as severely as the old "TSO'd crap" natural rubber that we've used since Wilbur put them on the Flyer. Anybody got a lead on who has them for relatively few AMUs for common sizes like 600-6 and so on? Jim |
#9
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Inner Tubes
RST Engineering wrote:
Anybody got a lead on who has them for relatively few AMUs for common sizes like 600-6 and so on? Both my mechanic and Desser recommended the Aero-Classic LeakGuard tubes. We installed them a couple years ago and I can't remember the last time I filled them. Definitely more expensive than a regular tube, but worth it. -Doug -- -------------------- Doug Vetter, ATP/CFI http://www.dvatp.com -------------------- |
#10
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Inner Tubes
Both my mechanic and Desser recommended the Aero-Classic LeakGuard
tubes. We installed them a couple years ago and I can't remember the last time I filled them. Definitely more expensive than a regular tube, but worth it. Now that is high praise. Mary and I fill the tires at least twice a month. It's her least favorite task, since -- thanks to our Fancy Pants -- it's a real bitch to do. (Me? I just stand there and push -- or pull -- till things are lined up properly... :-) -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
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