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 -> Zenith-List

View previous topic :: View next topic

Author Message

rstone4(at)hot.rr.com
Guest

Posted: Thu May 17, 2007 6:04 pm Post subject: Tire Pressure

Members,

      Who can tell me what the  tire pressure is supposed to be on the ZodiacXL with tri-gear.

  

 Tracy Stone

   [quote][b]

gfmjr_20(at)HOTMAIL.COM
Guest

Posted: Thu May 17, 2007 7:04 pm Post subject: Tire Pressure

50lbs.



George May

601XL 912s---74 hours

 	  Quote: 	
		  From: "robert stone" <rstone4(at)hot.rr.com>

Reply-To: zenith-list(at)matronics.com

To: "Zenith list" <zenith-list(at)matronics.com>

Subject: Tire Pressure

Date: Thu, 17 May 2007 21:03:08 -0500



Members,

      Who can tell me what the tire pressure is supposed to be on the 

ZodiacXL with tri-gear.



Tracy Stone


	


_________________________________________________________________

PC Magazine’s 2007 editors’ choice for best Web mail—award-winning Windows 

Live Hotmail.

wjones(at)brazoriainet.co
Guest

Posted: Fri May 18, 2007 4:03 am Post subject: Tire Pressure

Hi Tracy ,I don't know what the correct  tire pressure is for the 601XL .My Tripacer calls for 22# mains and 15#  nose ,this is for a 2000# gross aircraft .

 Wade Jones    South Texas 

601XL plans building

Cont.  0200

 [quote]   ---

rstone4(at)hot.rr.com
Guest

Posted: Fri May 18, 2007 4:20 am Post subject: Tire Pressure

Hay Wade,

        I have 25  pounds in all three and I thought it was a little high.

 Can you believe what this guy told  me!!!

  

  

 --> Zenith-List message posted by: "george may" <gfmjr_20(at)hotmail.com (gfmjr_20(at)hotmail.com)>



50  lbs.



George May

601XL 912s---74 hours

  

 Tracy

 [quote]    

    

    

   ---

Jaybannist(at)cs.com
Guest

Posted: Fri May 18, 2007 4:22 am Post subject: Tire Pressure

Tracy,



According to my Photo Guide, Section 6-G, page 6, the tire pressure should be 50 PSI.  I had to call ZAC to find this information myself.



Jay in Dallas



"robert stone" <rstone4(at)hot.rr.com> wrote:



 	  Quote: 	
		  Members,

     Who can tell me what the tire pressure is supposed to be on the ZodiacXL with tri-gear.



Tracy Stone

larry(at)macsmachine.com
Guest

Posted: Fri May 18, 2007 5:09 am Post subject: Tire Pressure

Robert,

Usually the tire specifies tire pressure on the side in fine print. For 

the weight of a loaded XL, the tire pressure could

be below this amount by 3 to 4 lbs to reduce the wear and soften 

landings on the tires.  Depends a bit more on what

specific tire you have to give an accurate answer, but 28 to 31 lbs 

would be a good guess for a 33 psi tire.



Larry McFarland at www.macsmachine.com

do not archive



robert stone wrote:

 	  Quote: 	
		   Members,

      Who can tell me what the tire pressure is supposed to be on the 

 ZodiacXL with tri-gear.

  

 Tracy Stone

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Fri May 18, 2007 8:45 am Post subject: Re: Tire Pressure

50 lbs!   Where did ZAC come up with that number? I would think those tires would be like rocks!  The 5:00 nose on a 172 is 26 psi - on a 182 I seem to remember it was 42 psi.  



It would be nice if ZAC would clarify the reasons behind such high pressures.



Tim

_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri May 18, 2007 11:27 am Post subject: Re: Tire Pressure

They got it from the tire manufacturer, Condor. Look on page 6 of the build manual 6-G. There is a picture of the chart.



http://www.zenithair.com/zodiac/xl/data/6-gear.pdf

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

gfmjr_20(at)HOTMAIL.COM
Guest

Posted: Fri May 18, 2007 12:07 pm Post subject: Tire Pressure

At least this guy knows how to read the assembly guide-----and utilize it



do not archive



[quote]From: "robert stone" <rstone4(at)hot.rr.com>

Reply-To: zenith-list(at)matronics.com

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

Subject: Re: Tire Pressure

Date: Fri, 18 May 2007 07:20:06 -0500



Hay Wade,

        I have 25 pounds in all three and I thought it was a little high.

Can you believe what this guy told me!!!




50 lbs.



George May

601XL 912s---74 hours



Tracy



   ---

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Fri May 18, 2007 12:10 pm Post subject: Re: Tire Pressure

Boy!  Talk about hot of the press....  Gig, thanks for pointing out the new pictorial gear guide.  I hadn't seen it yet.



Tim

_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

daveaustin2(at)primus.ca
Guest

Posted: Fri May 18, 2007 12:43 pm Post subject: Tire Pressure

Chris Heintz instructions are to allow the tires to depress by one third of 

distance from rim to ground  to allow them to absorb some of the shock (on 

the 601 HDS).  You don't want them too hard.

Dave Austin  601HDS - 912, Spitfire Mk VIII

---

daveaustin2(at)primus.ca
Guest

Posted: Fri May 18, 2007 12:44 pm Post subject: Tire Pressure

Isn't the pressure indicated on the side of the tire the max pressure before 

it explodes?

Dave Austin  601HDS - 912, Spitfire Mk VIII

---

zenith601xl(at)gmail.com
Guest

Posted: Fri May 18, 2007 12:57 pm Post subject: Tire Pressure

50 psi is the maximum, not the reccomended pressure.  At 50 psi a 5.00x5 6pr

tire has a rated maximum load of 1285 lbs. per tire, or 3855 lbs on three of

them.  A 601XL with a max gross weight of 1320 lbs isn't even close.  I

don't know what the proper pressure is, but it is certainly much less than

50 psi.

On 5/18/07, george may <gfmjr_20(at)hotmail.com> wrote:

[quote]

 At least this guy knows how to read the assembly guide-----and utilize it

 do not archive

 >From: "robert stone" <rstone4(at)hot.rr.com>

 >Reply-To: zenith-list(at)matronics.com

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

 >Subject: Re: Tire Pressure

 >Date: Fri, 18 May 2007 07:20:06 -0500

 >

 >Hay Wade,

 >        I have 25 pounds in all three and I thought it was a little high

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Fri May 18, 2007 1:20 pm Post subject: Re: Tire Pressure

IMO I think 50 psi is too high.   That may well be the max pressure allowed by the tire manufacturer but that doesn't mean that the tire should be pumped up that high on such a light aircraft.



For example - 6:00-6 4 ply tires have a max inflation pressure of 29 psi.  On my L16 Champ, the USAF recommended a max inflation of 15 psi.  The reduced pressure provides an important shock absorbing effect for the landing gear.  It is the aircraft manufacturer (you) that determines recommended tire pressures.



I found a formula that may be of some use:

Weight on tire x max tire pressure x 1.04 Ã· Tire Load Rating = inflation pressure of tire (when AC resting on wheels)



For example, if we assume a weight of 600 lbs on a main tire then it would be 600 x 50 x 1.04 Ã· 1285 or  24 psi  

Just something to think about.....



Tim

_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

601zv(at)ritternet.com
Guest

Posted: Fri May 18, 2007 2:05 pm Post subject: Tire Pressure

That was precisely my first thought, as the Condor  tires I received from ZAC are rated 1285 lb., but what about the load that would  be imparted by a hard landing - should not that be considered?

 [quote]   ---

rstone4(at)hot.rr.com
Guest

Posted: Fri May 18, 2007 2:48 pm Post subject: Tire Pressure

I just looked at 6-G-1, 6-G-2, and 6-G-3 and there is no chart and the 

required tire pressure is not shown!!!



Tracy Stone



---

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri May 18, 2007 8:02 pm Post subject: Re: Tire Pressure

Not the planes the construction manual. Follow this link.



[url]http://www.zenithair.com/zodiac/xl/data/6-gear.pdf [/url]



 	  rstone4(at)hot.rr.com wrote: 	
		  I just looked at 6-G-1, 6-G-2, and 6-G-3 and there is no chart and the 

required tire pressure is not shown!!!



Tracy Stone



---

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

David X

Joined: 10 Jan 2006
Posts: 154
Location: Princeton, NJ, USA

Posted: Sat May 19, 2007 8:31 pm Post subject: Re: Tire Pressure

Duh! Read the recommended tire pressure on the side of the tire. The aircraft does have suspension, afterall.

_________________
Zodiac 601 XL - CZAW Built - Rotax 912S
DO NOT ARCHIVE

601zv(at)ritternet.com
Guest

Posted: Sun May 20, 2007 4:50 am Post subject: Tire Pressure

That may work as a last resort if you have no better information, would be 

no help if you have tires like the ZAC supplied Condors that have no 

pressure to read on the side.



---

daveaustin2(at)primus.ca
Guest

Posted: Sun May 20, 2007 5:43 am Post subject: Tire Pressure

Tire pressure on the tire side is MAX pressure.  20lbs does my 601 about 

right.

Dave Austin  601HDS - 912, Spitfire Mk VIII

---

Display posts from previous:

	Matronics Email Lists Forum Index -> Zenith-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