Today's Message Index:
----------------------
1. 05:25 AM - Re: Tire pressure (Catz631@aol.com)
2. 06:13 AM - Re: Re: Tire pressure (Patrick Reilly)
3. 09:08 AM - tire pressure (Bill Malpass)
4. 04:14 PM - Re: tire pressure (Patrick Reilly)
5. 04:44 PM - Re: Tire pressure (Patrick Reilly)
6. 08:40 PM - Re: Tire pressure (Paul Franz - Merlin GT)
Message 1
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| Subject: | Re: Tire pressure |
Pat,
I have the same gear/tires that you do and having been running 10 lbs of
air pressure in them for well over a year. That appears to be a good
pressure. Get it too low and you might have a possibility of tire movement on
the
rim thus shearing the inflation stem.
Dick Maddux
Milton,Fl
Message 2
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| Subject: | Re: Tire pressure |
James, I have a low pressure gage. Not sure where I got it, but I got it
when racing dirt bikes. Try a dirt bike parts supplier, maybe Dennis Kirk in
MN. or a local shop.
Pat Reilly
Mod 3 582 Rebuilt
Rockford, IL
On Sun, Apr 10, 2011 at 9:18 PM, WurlyBird <james.t.trizzino@us.army.mil>wrote:
> james.t.trizzino@us.army.mil>
>
> I have the Nanco tires as well and have found that about 8 lbs indicated on
> my dial is working good as a compromise for taking off on asphalt and then
> landing wherever. My issue is I have not been able to find a good pressure
> gauge for this range. Any one have a good suggestion of where to find a
> gauge the is indicating clearly between 0 and 10 lbs?
>
> --------
> James
> Kitfox 3 / 582 / 70" IVO 2 blade GA
> 50 hrs on the Fox in between deployments,
> now she lies in wait
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=336589#336589
>
>
--
Pat Reilly
Mod 3 582 Rebuild
Rockford,IL
Message 3
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My 2 cents worth on tire pressures..............
I have a model III with a 582. When I was learning how to ground
manuever this plane, I went through 3- high hour instructors, and they
all said this was the toughest plane to take off and land that they had
ever experienced. I had to put in 32 hours on grass before I felt I
could advance to hard surface. I already had 150 hours on ultralights.
One thing I found, was I was using too much pressure (about 20 lbs). I
does make it easier to roll on the ground though.
I then started to experiment with was tire pressure. I found the plane
was the least squirrley on the ground with 9 pounds of air. Not 10 but 9
! The one pound made the difference. I have the Grove gear on my
Kitfox. The tires may in fact slip on the wheels. If the wheel seat is
good and clean you shouldnt loose any air. You can buy tubes that have
locking stems so that the stems wont get sheared off. I may get those
if I see my tire pressure going down too often. Go to a lawnmower repair
shop or recreational vehicle place to get the tubes.
Try that and see what you think.
Bill Malpass N793RK
Model III 582 with grove gear and wheel pants.
Message 4
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| Subject: | Re: tire pressure |
Kitfoxers, Well after all the advice on tire pressure, remember I am running
the Nanco 21"x12"x8'' rim, Fitt's bush gear, 582, 628# empty, mod 3. I
reduced my tire pressure to 5 1/2 # today and took off of grass and landed
in a bean field. My instructor, with me since it has been 5 months since I
have flown, commented on how much suspension the tires provided, and asked
how much pressure I carried. He is a Luscomb pilot and not familiar with the
high flotation low presssure tires. He was surprised when I told him 6
pounds and that was a little higher than the 3 to 4 pounds some of the
tundra tire drivers use. Anyway I was happy today with the 5 1/2 #.
Pat Reilly
Mod 3 582 Rebuilt
Rockford, IL
On Mon, Apr 11, 2011 at 11:05 AM, Bill Malpass <malpass-architect@att.net>wrote:
> My 2 cents worth on tire pressures..............
>
> I have a model III with a 582. When I was learning how to ground manuever
> this plane, I went through 3- high hour instructors, and they all said this
> was the toughest plane to take off and land that they had ever experienced.
> I had to put in 32 hours on grass before I felt I could advance to hard
> surface. I already had 150 hours on ultralights. One thing I found, was I
> was using too much pressure (about 20 lbs). I does make it easier to roll
> on the ground though.
>
> I then started to
> experiment with was tire pressure. I found the plane was the least
> squirrley on the ground with 9 pounds of air. Not 10 but 9 ! The one pound
> made the difference. I have the Grove gear on my Kitfox. The tires may in
> fact slip on the wheels. If the wheel seat is good and clean you shouldnt
> loose any air. You can buy tubes that have locking stems so that the stems
> wont get sheared off. I may get those if I see my tire pressure going down
> too often. Go to a lawnmower repair shop or recreational vehicle place to
> get the tubes.
>
> Try that and see what you think.
> Bill Malpass N793RK
>
> Model III 582 with grove gear and wheel pants.
>
> *
>
> *
>
>
--
Pat Reilly
Mod 3 582 Rebuild
Rockford,IL
Message 5
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| Subject: | Re: Tire pressure |
Dick, I am on the grass and dirt and used 5 1/2 # today successfully. I will
increase the pressure to 9 or 10 pounds if I am going to land on a paved
runway to avoid spinning a tire on the rim. Thanks for the advice.
Pat Reilly
Mod 3 582 Rebuilt
Rockford, IL
On Mon, Apr 11, 2011 at 7:19 AM, <Catz631@aol.com> wrote:
> Pat,
> I have the same gear/tires that you do and having been running 10 lbs of
> air pressure in them for well over a year. That appears to be a good
> pressure. Get it too low and you might have a possibility of tire movement
> on the rim thus shearing the inflation stem.
> Dick Maddux
> Milton,Fl
>
--
Pat Reilly
Mod 3 582 Rebuild
Rockford,IL
Message 6
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| Subject: | Re: Tire pressure |
On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote:
> Dick, I am on the grass and dirt and used 5 1/2 # today successfully. I will
> increase the pressure to 9 or 10 pounds if I am going to land on a paved
> runway to avoid spinning a tire on the rim. Thanks for the advice.
I have a couple of thoughts on this.
1) Are rim locks like the ones used on motocross bikes feasible and available?
2) The maximum possible braking effort is reduced with larger diameter tires compared
to the same brakes with smaller diameter tires. If the wheels are also larger,
then
the shear stress is reduced (the stress that causes the tire to slip on the wheel)
so
this would also contribute to a lower tire pressure required.
3) Isn't it true that the biggest risk of slipping the tire on the wheel is hard
braking on a surface the tire can't slide on? And aren't runways that are paved
mostly
so long you don't need to use the brakes at all?
4) I accidentally deleted the e-mail but didn't someone suggest some kind of an
available guard so that the inner tube can't slip or something protects the valve
stem
from shearing off?
5) I assume that large low pressure tires require innertubes.
--
Paul A. Franz
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
Office 425.440.9505
425.241.1618 Cell
In general, the art of government consists of taking as much money as possible
from
one party of the citizens to give to the other.
-- Voltaire (1764)
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