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Re: Europa-List: Mono Inner Tyre Failures

Subject: Re: Europa-List: Mono Inner Tyre Failures
From: Duncan & Ami McFadyean <ami@mcfadyean.freeserve.co.uk>
Date: Sun, 20 Sep 2009 20:12:23
<< Are the tri gears having this problem?>>
Or the Taildraggers; the answer to which is no, except early on when 
using cheaper non-aviation inner tubes resulting in two punctures, one 
during landing.
These appeared to have resulted from internal abrasion/stressing of the 
inner tube (possibly some dirt in there), rather than from a projectile. 
Therein should lie a lesson.

The proper inner tubes have lasted 350+ hours, although don't hold air 
as well as would be expected; may try some 'Slime'-equivalent!.

Duncan McF
  ----- Original Message ----- 
  From: Jim Brown 
  To: europa-list@matronics.com 
  Sent: Sunday, September 20, 2009 1:10 PM
  Subject: Re: Europa-List: Mono Inner Tyre Failures


        Paul

        I have been following this thread on flats, and I have a few 
points to make, that have worked for me.

        I have been flying my monowheel almost ten years off paved 
runway's...My kit included the old "tundra tire" and instructions to use 
low pressure,(I don't remember PSI, but the sidewalls rubbed the Landing 
gear frame.) The plane taxied like it was runing in mud..

        I changed that tire at about 20 hours to a 700 X 6 and 6 plys 
and used 30 PSI. The plane is much easier to taxi, take off's are much 
quicker, and in 800 hours I have replaced two tires that were worn out. 
No flats !!!! I can't say that the air pressure is the problem, and also 
I don't fly off grass, but I have not had the problems that so many of 
you are having.

        On another note having made the above change I also changed the 
outrigger lengths, as the new tire, with higher pressure made the 
original outriggers to short. Over the past ten years I have extened the 
outriggers in length, to now when the plane is parked, both outriggers 
touch the ground. For me ground handling is much better, and in landing 
with the longer outriggers the "rocking from one outrigger to the other" 
is now gone.

        Also another question ? Are the flats limited to the Monowheels 
??? Are are the tri gears having this problem? 

        Jim Brown
        XS Monowheel.

        --- On Thu, 9/17/09, Paul McAllister 
<paul.the.aviator@gmail.com> wrote:


          From: Paul McAllister <paul.the.aviator@gmail.com>
          Subject: Re: Europa-List: Mono Inner Tyre Failures
          To: europa-list@matronics.com
          Date: Thursday, September 17, 2009, 12:32 PM


<paul.the.aviator@gmail.com>

          Hi,

          I have this happen regularly.  I now just change them every 
100 hours
          and I never travel without my jacking block and a spare inner 
tube.  I
          have tried inner tube talcum powder and different pressures 
with out
          much improvement.

          The failure mode seems to be chafing on the side wall due to 
running
          such  low pressure.

          Paul

          On Thu, Sep 17, 2009 at 5:02 AM, Raimo Toivio 
<raimo.toivio@rwm.fi> wrote:
          > All
          >
          > I have lost without visible or known reason two innner tyres 
in my
          > Monowheel.
          >
          > Loosing suddenly main gear=B4s air pressure is not a funny 
game and did not
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