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Tire Pressure
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wjones(at)brazoriainet.co
Guest

Posted: Sun May 20, 2007 6:02 am Post subject: Tire Pressure

Dave that sounds about right for pressure .I fly a Sonerai and it gets very 

hard to handle with say over 25# .My Piper Tripacer uses 22# mains & 15# 

nose .I have been flying this Sonerai for 30 years and I think I know what 

is best for this plane at 600# .I once had a high time pilot call me about 

why he was having trouble flying a recently bought Sonerai .I suggested for 

him to use the minimum pressure that he could get by with .This cured his 

problem enough that he started air racing his Sonerai in the "V" class . I 

flew my Sonerai yesterday and today already ,makes an old man feel good 

.Making good progress on the 601XL .

Wade Jones    South Texas

601XL plans building

Cont. 0200

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wjones(at)brazoriainet.co
Guest

Posted: Sun May 20, 2007 6:33 am Post subject: Tire Pressure

Correction the 600# is empty weight . DO NOT ARCHIVE

Wade Jones    South Texas

601XL plans building

Cont. 0200

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rstone4(at)hot.rr.com
Guest

Posted: Sun May 20, 2007 4:43 pm Post subject: Tire Pressure

Wade,

     I think you have lolved my problem,  I have been learning to fly my 

ZodiacXL ever since it's completion and all is going well except the 

landings.  After reading your post about air pressure in the tires of a 

light aircraft, I am convinced that the 25 pounds I have in my tires is the 

reason I am having so much trouble landing.  The nexzt time I fly, I am 

going to reduce the pressure down to 20 pounds  in all three and see if this 

causes my landings to inprove.  I will let you know what the outcome is.



Tracy Stone

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Sun May 20, 2007 6:30 pm Post subject: Tire Pressure

The pressure printed on the side of a tire is not the recommended 

pressure, it is the maximum pressure at the maximum load the tire is 

designed for. The recommended pressure will depend on the actual load on 

the tire. For instance, the tires on my truck have 60 psi printed on 

them but if I were to put that much pressure in them I would be bouncing 

all over the road every time I hit a small bump. The recommended 

pressure of 34 psi for gross weight is printed on a sticker on the 

driver's side door frame and gives a much safer ride. Those who have 

suggested a pressure of about 20 psi for the 5 X 5 tires on the 601XL 

are in the right ball park.

David X wrote:

 	  Quote: 	
		   

 

 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


	


-- 

Bryan Martin

Zenith 601XL N61BM

Ram Subaru, Stratus redrive

Do Not Archive

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_________________
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

wjones(at)brazoriainet.co
Guest

Posted: Sun May 20, 2007 7:13 pm Post subject: Tire Pressure

Tracy I hope you get your landings worked out ,I am sure you will .We all 

know that landings are easier with a reduced tire pressure ,however it goes 

without saying that you must maintain a safe pressure . I fly off my grass 

strip and when I make a bad landing I never know it due to the wheel 

slippage over the grass .Hard pavement landings are much more demanding for 

me .

Wade Jones    South Texas

601XL plans building

Cont. 0200

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David X

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

Posted: Sun May 20, 2007 7:58 pm Post subject: Re: Tire Pressure

Mine are set for 35 psi as per the manufacture recommendation.



There is a lot of talk about how the lower tire pressure makes for softer landings etc. If you're landing on grass or gravel, then perhaps the lower pressure might help reduce the chances of digging in on soft ground. But if your landing on ashfault or cement, let the suspension do the job instead.



Keep in mind that the lower tire pressure adds to the take-off roll, which is why I keep mine at the upper end. There is a significant difference between a marginally inflated tire and a full one when trying to get up to take-off speed.

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

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