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		paul.mcallister
 
 
  Joined: 09 Jan 2006 Posts: 177 Location: Waukesha, WI USA
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				 Posted: Sun Jan 15, 2006 7:09 am    Post subject: Monowheel Tire & Tube life | 
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				Hi all,
 
 I am wondering how folks are making out with Monowheel tires and tube life.
 If I keep the tube inflation in the 18~20 psi then I find that it is really
 tough on the tubes.  Yesterday I had my second tube failure while on
 landing.  If you have ever had this happen is tough going,  it is impossible
 to move the aircraft by hand.
 
 At this stage I am thinking of changing my tubes every 100 hours, but I am
 wondering about the tire.  The tire I have now has 370 hours on it and it
 still has tread, how ever its obvious that the side walls have been weakened
 by the constant running at low pressure, so perhaps I need to change it more
 often as well.  Thoughts  ?
 
 Paul
 N378PJ
 
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		rehn(at)rockisland.com Guest
 
 
 
 
 
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				 Posted: Sun Jan 15, 2006 9:45 am    Post subject: Monowheel Tire & Tube life | 
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				Hi Paul
 
 I have been wondering the same. I have about 270 hrs. on same tire and tube 
 with no problems to date with 18lbs. Tire looks ok but I have same concerns. 
 Will be nice to hear from others.
 Regards
 Jerry
 ---
 
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		acrojim(at)cfl.rr.com Guest
 
 
 
 
 
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				 Posted: Sun Jan 15, 2006 10:26 am    Post subject: Monowheel Tire & Tube life | 
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				Paul
 
 I'm not sure what type tire you are using. I know early on, around 1998 Europa
 was supplying the tundra tires with their kits here in the US. and they took
 about 18 PSI. I am based at an airport with paved runways, and these tires were
 not user friendly, I was having some of the same problems you are having.
 
 I replaced that tire at about 100 hours with a standard aircraft tire. Since I do
 not fly off grass I keep 30-35 PSI. I got about 400 hours on this tire and
 replaced because the tread was worn off. If memory serves me correctly I also
 used a 6 ply tire. The side walls are much more stiffer and gives better control
 on landing.
 
 Jim Brown
 
 Paul McAllister wrote:
 
  	  | Quote: | 	 		   
 
  Hi all,
 
  I am wondering how folks are making out with Monowheel tires and tube life.
  If I keep the tube inflation in the 18~20 psi then I find that it is really
  tough on the tubes.  Yesterday I had my second tube failure while on
  landing.  If you have ever had this happen is tough going,  it is impossible
  to move the aircraft by hand.
 
  At this stage I am thinking of changing my tubes every 100 hours, but I am
  wondering about the tire.  The tire I have now has 370 hours on it and it
  still has tread, how ever its obvious that the side walls have been weakened
  by the constant running at low pressure, so perhaps I need to change it more
  often as well.  Thoughts  ?
 
  Paul
  N378PJ
 
 
 | 	 
 
 
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		paul.mcallister
 
 
  Joined: 09 Jan 2006 Posts: 177 Location: Waukesha, WI USA
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				 Posted: Sun Jan 15, 2006 2:27 pm    Post subject: Monowheel Tire & Tube life | 
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				Hi Jim,
 
 I'm using a MCleary Airtrack 7/600, but inflated at 18 PSI.  My first inner
 tube failure was at around 220 hours.  The low pressure running caused
 chafing of the tube side wall to the point where it rubbed through.  At that
 time I used the same tire and just put a new tube in it.
 
 The second failure was at 370 hours for the same reason however I noticed
 that although I had tread left the side walls of the tire were very weak
 when compared to a new tire.  For the same pressure it looked much
 "flatter".  I am assuming that internal structure of the tire was fatigued
 do to running it flat.
 
 What I am thinking of doing is to replace the tire every 200 hours and the
 tubes every 100 hours.
 
 Regards,  Paul
 
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		SPurpura(at)aol.com Guest
 
 
 
 
 
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				 Posted: Sun Jan 15, 2006 6:08 pm    Post subject: Monowheel Tire & Tube life | 
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				I KEEP 22 - 24 PSI IN THE AIRHAWK TIRE, NOW OVER 360 HRS & NO PROBLEM.
 SAM  N77EU
 
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