Anyone running nitrogen instead of air ?
Common aviation practice, it is inert, and removing oxygen results in less
rubber
corrosion, more stable tyre pressures with temperature change.
On a pushbike inner tube I have observed seams that wear out causing punctures
due to side wall flex.
Tyre side wall failure stressing and wearing through the side wall causing
punctures.
Side wall flex increases with lower tyre presures and heat build up.
Buy the best quality tubes (and tyres) you can get..thickest rubber from
recognised
manufacturers...Chinese rubbers are not as corrosive resistant and age leak
earlier.
I used slime on a 120 hp motorcycle and pulled three nails out in consecutive
weeks
with no loss of pressure (tubless)and used the bike untill the tyre wore
out as a chase bike while instructing...
Was originaly recognised as a safety feature(it works) but sold now in UK for
ATV/off
road use due to fears of litigation..(tyre will fail catastropicaly if
side wall/cord is damaged) (I also ran my MC school bikes on it and it saved
down
time,but on tubed rims any puncture object would be removed & new tube fitted
in case it the tube splits.
Daily inspection of wheels should include pressure..learn to judge from tyre
profile
& contact area, tyre creep, paint on tell tails.
Side wall damage,cuts splits especialy cords, bulges...run your hand around the
profile and feel for bulges (Snapped internal cords/failed carcase)can feel like
an out of balance wheel when rolling.
Also inspect hub for damage and tail wheel rotates on its bearings.
On a motorcycle we increase tyre pressure for additional load to compensate for
additional tyre wall flex,maintain proper contact patch and grip for braking,
I allowed 5 psi increase for 150 lb load increase (medium passenger)..Use as
rule of thumb adjust acording to fuel load also?
Use your eyes and look at which parts of your tyre is wearing out first..centre
thin line, too high a presure.
outer of the tyre too soft increase.
5 psi at a time from recomended is a safe comparison point.
Use an acurate gauge when starting to measure.
Keep wheel wells,spats, and frames clear of dried mud.
If you have a tri gear drift will show as scrubbing to one half of the tyre or
other..Double the life of your tyres by rotating them (thicker tread is more
puncture
resistant) either on same axle or opposite axels if tyre rotation arrows
are uni-directional.
Examine your tubes for sidewall chaffing while they are out.
Kerbing any vehicles tyre can damage the structure of the tyre,tracking steering
and suspension..be carefull changing from grass to hardstandings.
Pick up and dispose of foreign objects around the hanger and pad.
Practice your tyre checking on your car, pushbike,motorcycle..unusual wear
patterns
all try to tell you what is going on.
To summerise PILECK Pressures Inspect Load Clean Enviroment Kerbs
Regards
Kevin
--- On Sun, 20/9/09, Duncan & Ami McFadyean <ami@mcfadyean.freeserve.co.uk>
wrote:
> From: Duncan & Ami McFadyean <ami@mcfadyean.freeserve.co.uk>
> Subject: Re: Europa-List: Mono Inner Tyre Failures
> To: europa-list@matronics.com
> Date: Sunday, 20 September, 2009, 8:12 PM
>
>
>
>
>
>
>
> << 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 ???
> Areare 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
>
>
> --> Europa-List message
> posted by: Paul
> McAllister <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 gears air pressure is not
> a funny game and did
> not
> >om/Navigator?Europa-List"
>
> target=_blank>http://www.matronics.com/Navigatosp;
>
> -
> MATRONICS WEB FO/" ;
> -Matt
> Dralle, List
> Admin=========
>
>
>
>
>
>
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