Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Tire pressure
Goto page 1, 2 Next

Matronics Email Lists Forum Index -> Kitfox-List

View previous topic :: View next topic

Author Message

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Sun Apr 10, 2011 4:14 pm Post subject: Tire pressure

Kitfoxers, I have Lowell Fitt's bush gear with Nanco 21"x12"x8" tires on aluminum rims with tubes. What tire pressure should I run? The bush gear is tough, but those die springs are stiff with very little travel. I'd like to get as much added suspension out of the tires as possible without spinning a tire on the rim. 

-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Sun Apr 10, 2011 5:39 pm Post subject: Tire pressure

On Sun, April 10, 2011 5:11 pm, Patrick Reilly wrote:

 	  Quote: 	
		   Kitfoxers, I have Lowell Fitt's bush gear with Nanco 21"x12"x8" tires on

 aluminum rims with tubes. What tire pressure should I run? The bush gear is

 tough, but those die springs are stiff with very little travel. I'd like to

 get as much added suspension out of the tires as possible without spinning a

 tire on the rim.


	


Tires that big are for landing in rough stuff. To get the most out of that you want

the pressure as low as possible. Probably air them with no weight on the tires to 15

to 20 psi when the tires are warm. Then after they sit for a while and stretch out

with that high pressure in them, let out all the air and immediately put the valves

back in. That should be about right. If you find that they slip loose from the rims,

add just a little air. Probably less than 3 psi. There is some compromise here, with

that low pressure you shorten your landing roll and can take harder hits from the

rocks and other bumps but you will also lengthen your takeoff roll, especially on

pavement.



-- 

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)

_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

WurlyBird

Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

Posted: Sun Apr 10, 2011 6:18 pm Post subject: Re: Tire pressure

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 582 swapping for HKS 700E and Avid Cowl.

Flydad57(at)neo.rr.com
Guest

Posted: Sun Apr 10, 2011 7:04 pm Post subject: Tire pressure

Your local off-road motorcycle dealer should have such a gauge.  ATV tires 

are  often inflated to less than 10 pounds.



Bob Taylor

TigerCub N657RT



--------------------------------------------------

From: "WurlyBird" <james.t.trizzino(at)us.army.mil>

Sent: Sunday, April 10, 2011 10:18 PM

To: <kitfox-list(at)matronics.com>

Subject: Re: Tire pressure



 	  Quote: 	
		   

 <james.t.trizzino(at)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&quot; 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

thesupe(at)hotmail.com
Guest

Posted: Sun Apr 10, 2011 7:35 pm Post subject: Tire pressure

I've had a set of these tires on my Avid MK IV and found that if I tried to run them at much less than 8 lbs, they would leak around the bead.  I ended up putting tubes in them to overcome this, but had one tire spin on the rim on blacktop runway and it cut the valve stem off the tube.  I've heard there is some type of bead sealer the 4 wheeler guys use for running tires at low pressure, but have never used it myself.  Take care,  Jim Chuk   Avid MK IV (flying0  Kitfox 4 (building)  Northern Mn

 

 > From: Flydad57(at)neo.rr.com

 	  Quote: 	
		   To: kitfox-list(at)matronics.com

 Subject: Re: Re: Tire pressure

 Date: Sun, 10 Apr 2011 23:01:59 -0400

 

 --> Kitfox-List message posted by: "Robert Taylor" <Flydad57(at)neo.rr.com>

 

 Your local off-road motorcycle dealer should have such a gauge. ATV tires 

 are often inflated to less than 10 pounds.

 

 Bob Taylor

 TigerCub N657RT

 

 --------------------------------------------------

 From: "WurlyBird" <james.t.trizzino(at)us.army.mil>

 Sent: Sunday, April 10, 2011 10:18 PM

 To: <kitfox-list(at)matronics.com>

 Subject: Re: Tire pressure

 

 > --> Kitfox-List message posted by: "WurlyBird" 

 > <james.t.trizzino(at)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&quot; 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

 >

 >

 >

 >

 >

 >

 >

=====================
	


[quote] _=====

 

 

 

 		 	   		     	  Quote: 	
		  [b]

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Mon Apr 11, 2011 4:25 am Post subject: 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

Kitfox_058.jpg

Description:

Filesize:

386.4 KB

Viewed:

15447 Time(s)

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Mon Apr 11, 2011 5:13 am Post subject: 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(at)us.army.mil (james.t.trizzino(at)us.army.mil)> wrote:

  	  Quote: 	
		  --> Kitfox-List message posted by: "WurlyBird" <james.t.trizzino(at)us.army.mil (james.t.trizzino(at)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&quot; 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

 ist Un/Subscription,

 www.matronics.com/Navigator?Kitfox-List" target="_blank">http://www.matronics.com/Navigator?Kitfox-List

 ronics.com/" target="_blank">http://forums.matronics.com

 Matt Dralle, List Admin.

 =====



	




 

-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

malpass

Joined: 27 Aug 2007
Posts: 39
Location: Marietta, Georgia

Posted: Mon Apr 11, 2011 8:08 am Post subject: tire pressure

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.



   [quote][b]

_________________
kitfox III w/ 582 greyhead

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Mon Apr 11, 2011 3:14 pm Post subject: 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(at)att.net (malpass-architect(at)att.net)> wrote:

  	  Quote: 	
		     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.



 	  Quote: 	
		  



arget="_blank">http://www.matronics.com/Navigator?Kitfox-List

ttp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	
	


-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Mon Apr 11, 2011 3:44 pm Post subject: 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(at)aol.com (Catz631(at)aol.com)> wrote:

  	  Quote: 	
		    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

  [quote][b]

Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Mon Apr 11, 2011 7:40 pm Post subject: Tire pressure

On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote:

 	  Quote: 	
		   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)

_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Tue Apr 12, 2011 4:03 am Post subject: Tire pressure

Paul and Pat,

  I operate off of grass and pavement. I find it easier to turn on  the grass with a little more air pressure (ie;aprox 10 lbs)

  My tires were installed on the rims with rim adhesive which helps  hold the tires to the rims and help to prevent air loss,although I still have to  top up from time to time.

  Prior posts on this site (about a year ago) had mentioned  shearing of the inflation valve with movement of the tire on the rim and that is  why I use 10 lbs of pressure ,as recommended by the posters. This has worked  well for me.

                                  Dick Maddux

                                  Milton,Fl

 [quote][b]

jack(at)comconn.com
Guest

Posted: Tue Apr 12, 2011 4:35 am Post subject: tire pressure

I did all of my training in a Kitfox I on pavement.

I did find that lower tire pressure made a world of difference

in landings, and I also wore out a set of tires fairly

quickly. I found replacement carlisle tires at the local 

tractor supply, and had them mounted at a lawnmower

repair shop.

The original builder of the plane had drilled the lip of the rim

and used a short, maybe #12 stainless metal screw in three places,

which ran into, not through, the bead of the tire. Rather than

explain, I took the screws out before having the tire mounted,

and put them back in myself.  Never spun the tire, even when

I landed with a flat (I hate mesquite thorns!).

And, yes, I always run tubes.

-Jack

Austin, TX

Avid MK IV, Jabiru 22AX01 (flying)

Avid Catalina Hirth F30 (building)

 	  Quote: 	

 Time: 08:40:12 PM PST US

 Subject: Re: Tire pressure

 From: "Paul Franz - Merlin GT" <paul(at)eucleides.com>

 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

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Tue Apr 12, 2011 3:25 pm Post subject: tire pressure

Jack, I was considering putting screws in the bead. I have seen that done on dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with out dismounting the tire. I guess it would be easy to stop short of drilling all the way thru and run a sheet metal screw in. You didn't state what pressure you ran in the tires.

   

 Pat Reilly

 Mod 3 582 Rebuilt.

 Rockford,IL

 On Tue, Apr 12, 2011 at 7:29 AM, Jack L Bell <jack(at)comconn.com (jack(at)comconn.com)> wrote:

  	  Quote: 	
		  --> Kitfox-List message posted by: Jack L Bell <jack(at)comconn.com (jack(at)comconn.com)>

 



I did all of my training in a Kitfox I on pavement.

I did find that lower tire pressure made a world of difference

in landings, and I also wore out a set of tires fairly

quickly. I found replacement carlisle tires at the local

 tractor supply, and had them mounted at a lawnmower

repair shop.



The original builder of the plane had drilled the lip of the rim

and used a short, maybe #12 stainless metal screw in three places,

which ran into, not through, the bead of the tire. Rather than

 explain, I took the screws out before having the tire mounted,

and put them back in myself.  Never spun the tire, even when

I landed with a flat (I hate mesquite thorns!).



And, yes, I always run tubes.



 -Jack

Austin, TX

Avid MK IV, Jabiru 22AX01 (flying)

Avid Catalina Hirth F30 (building)

 	  Quote: 	
		  



 Time: 08:40:12 PM PST US

 Subject: Re: Tire pressure

 From: "Paul Franz - Merlin GT" <paul(at)eucleides.com (paul(at)eucleides.com)>

 >
	


 	  Quote: 	
		  

 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.
	


 	  Quote: 	
		  

 I have a couple of thoughts on this.



 1) Are rim locks like the ones used on motocross bikes feasible and available?

 >
	


 	  Quote: 	
		   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
	


 	  Quote: 	
		   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
	


 	  Quote: 	
		   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
	


 	  Quote: 	
		   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
	


 	  Quote: 	
		   Office [url=tel:425.440.9505]425.440.9505[/url]

 [url=tel:425.241.1618]425.241.1618[/url] Cell

  
	


 as List Un/Subscription,

 www.matronics.com/Navigator?Kitfox-List" target="_blank">http://www.matronics.com/Navigator?Kitfox-List

 ronics.com/" target="_blank">http://forums.matronics.com

 Matt Dralle, List Admin.

 =====



	
 

-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Tue Apr 12, 2011 3:36 pm Post subject: Tire pressure

Paul, IIt appears all of your suppositions are correct. I think the tube valves can be ripped off no matter what precautions you take if the tire spins on the rim. Thanks for reminding me that the braking force the brakes exert is less with the larger tires. My brakes work fine, but they would be more powerful with smaller tires. Rim locks that are used on dirt bikes could work. But, screws thru the rim into the bead are as effective and much easier to install.

   

 Pat Reilly

 Mod 3 582 Rebuilt

 Rockford, IL 

 On Mon, Apr 11, 2011 at 10:36 PM, Paul Franz - Merlin GT <paul(at)eucleides.com (paul(at)eucleides.com)> wrote:

  	  Quote: 	
		  --> Kitfox-List message posted by: "Paul Franz - Merlin GT" <paul(at)eucleides.com (paul(at)eucleides.com)>

  

On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote:

 	  Quote: 	
		   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 [url=tel:425.440.9505]425.440.9505[/url]

[url=tel:425.241.1618]425.241.1618[/url] 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.

-- Volta=================

 y Browse, Chat, FAQ,

 ="http://www.matronics.com/Navigator?Kitfox-List" target="_blank">http:=====

  http://forums.mle, List Admin.

 =====



	




 

-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Tue Apr 12, 2011 3:58 pm Post subject: tire pressure

On Tue, April 12, 2011 4:17 pm, Patrick Reilly wrote:

 	  Quote: 	
		   Jack, I was considering putting screws in the bead. I have seen that done on

 dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with out

 dismounting the tire. I guess it would be easy to stop short of drilling all

 the way thru and run a sheet metal screw in. You didn't state what pressure

 you ran in the tires.


	


Pat,



I think that is a great idea. I'm kind of a perfectionist or worrier depending on your

perspective but I would dismount the tire before drilling the wheel so you can measure

and judge where the best place would be for the screws to penetrate the tire bead.

Then I would *NOT* drill a pilot hole into the tire. Here's my thinking. Drilling will

remove material and possibly damage connective fibers whereas sinking a sheet metal

screw no more than 3/4ths of the depth of the tire bead will make it tighter on the

screw and hopefully spread the fibers, not cut them.



Of course, this is my judgement and perception, not based on any actual experience.



-- 

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)

_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

Pat Reilly

Joined: 06 Aug 2009
Posts: 345

Posted: Tue Apr 12, 2011 4:15 pm Post subject: tire pressure

Paul, I bet I can do it with the tire on the rim. I won't drill all the way thru the rim. I'll stop short of hitting the tire and run a sheet metal screw thru whats left of the aluminum rim. It would be nice to see how thick the bead is to choose what length of screw to use. I would guess 1/2" # 10 sheet metal screw would do it. I just remembered I did this on a dirt bile years ago. But, I had drilled and measured the bead before mounting the tire.

   

 Pat Reilly

 Mod 3 582 Rebuilt

 Rockford, IL

 On Tue, Apr 12, 2011 at 6:55 PM, Paul Franz - Merlin GT <paul(at)eucleides.com (paul(at)eucleides.com)> wrote:

  	  Quote: 	
		  --> Kitfox-List message posted by: "Paul Franz - Merlin GT" <paul(at)eucleides.com (paul(at)eucleides.com)>

  

On Tue, April 12, 2011 4:17 pm, Patrick Reilly wrote:

 	  Quote: 	
		   Jack, I was considering putting screws in the bead. I have seen that done on

 dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with out

 > dismounting the tire. I guess it would be easy to stop short of drilling all
	


 	  Quote: 	
		   the way thru and run a sheet metal screw in. You didn't state what pressure

 you ran in the tires.


	




Pat,

 

I think that is a great idea. I'm kind of a perfectionist or worrier depending on your

perspective but I would dismount the tire before drilling the wheel so you can measure

and judge where the best place would be for the screws to penetrate the tire bead.

 Then I would *NOT* drill a pilot hole into the tire. Here's my thinking. Drilling will

remove material and possibly damage connective fibers whereas sinking a sheet metal

screw no more than 3/4ths of the depth of the tire bead will make it tighter on the

 screw and hopefully spread the fibers, not cut them.



Of course, this is my judgement and perception, not based on any actual experience.



--

 Paul A. Franz

Registration/Aircraft - N14UW/Merlin GT

Engine/Prop - Rotax 914/NSI CAP

Bellevue WA

Office [url=tel:425.440.9505]425.440.9505[/url]

[url=tel:425.241.1618]425.241.1618[/url] 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)

  

 Subscription,

 www.matronics.com/Navigator?Kitfox-List" target="_blank">http://www.matronics.com/Navigator?Kitfox-List

 ronics.com/" target="_blank">http://forums.matronics.com

 Matt Dralle, List Admin.

 =====



	
 

-- 

Pat Reilly

Mod 3 582 Rebuild

Rockford,IL

  [quote][b]

Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Tue Apr 12, 2011 4:58 pm Post subject: tire pressure

On Tue, April 12, 2011 5:11 pm, Patrick Reilly wrote:

 	  Quote: 	
		   Paul, I bet I can do it with the tire on the rim. I won't drill all the way

 thru the rim. I'll stop short of hitting the tire and run a sheet metal

 screw thru whats left of the aluminum rim. It would be nice to see how thick

 the bead is to choose what length of screw to use. I would guess 1/2" # 10

 sheet metal screw would do it. I just remembered I did this on a dirt bile

 years ago. But, I had drilled and measured the bead before mounting the

 tire.


	


I'm a bit more patient in my old age having been beat up so many times by short cut

decisions. I would want the best hole location and to know exactly how thick the rim

is and the thickness of the bead at the point where the screw penetrates. Of course,

you may already know that information from working with the tires and wheels.



-- 

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)

_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Tue Apr 12, 2011 5:24 pm Post subject: Re: Tire pressure

5  1/2 "  likely a bit low if your guage accurate but it ands nice extra softness to take out the bumps.  You plane will feel quite a bit differnt on pavement than on grass. Grass a lot more forgiving.

 

If you use tubes  -even more worry of tearing off a valve stem. With no tubes the tires might slip but you will un-likely be able to get the bead to break-- These Atv wheels hold them quite well. 

 

btw - anyone got a set of wheels for sale with brakes?

_________________
Realtime Kitfox movies to separate the internet chatter from the truth
http://www.youtube.com/user/kitfoxflyer
Hundreds of Kitfox Movies
Most viewed Kitfox on youtube
Most popular on youtube
Highest rated on youtube

Dwayne

Joined: 15 Apr 2006
Posts: 13

Posted: Tue Apr 12, 2011 9:12 pm Post subject: tire pressure

HELLLLLLOOOOOOO? Did anyone see my initial post?

  

  

 



--- On Wed, 4/13/11, Paul Franz - Merlin GT <paul(at)eucleides.com> wrote:



  	  Quote: 	
		  

From: Paul Franz - Merlin GT <paul(at)eucleides.com>

Subject: Re: tire pressure

To: kitfox-list(at)matronics.com

Date: Wednesday, April 13, 2011, 12:56 AM



 --> Kitfox-List message posted by: "Paul Franz - Merlin GT" <paul(at)eucleides.com (paul(at)eucleides.com)>



On Tue, April 12, 2011 5:11 pm, Patrick Reilly wrote:

 	  Quote: 	
		   Paul, I bet I can do it with the tire on the rim. I won't drill all the way

 thru the rim. I'll stop short of hitting the tire and run a sheet metal

 screw thru whats left of the aluminum rim. It would be nice to see how thick

 the bead is to choose what length of screw to use. I would guess 1/2" # 10

 sheet metal screw would do it. I just remembered I did this on a dirt bile

 years ago. But, I had drilled and measured the bead before mounting the

 tire.


	


I'm a bit more patient in my old age having been beat up so many times by short cut

decisions. I would want the best hole location and to know exactly how thick  the rim

is and the thickness of the bead at the point where the screw penetrates. Of course,

you may already know that information from working with the tires and wheels.



-- 

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 f="http://www.matronics.com/Navigator?Kitfox-List"  --> http:========================



	


               [quote][b]

Display posts from previous:

	Matronics Email Lists Forum Index -> Kitfox-List	All times are GMT - 8 Hours Goto page 1, 2 Next
Page 1 of 2

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum