gopal
Posts: 167
Joined: Thu Jun 03, 1999 3:05 am

Aircraft tires

Wed Feb 24, 1999 5:24 am

How often do airlines changes the tires on a widebody like 777 or 747. Is the lifespan of a tire measured in terms of no. of landings and takeoffs?
 
L-188
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: Aircraft tires

Wed Feb 24, 1999 5:55 am

Good Question. I think there is a cycle limit on the tires also I know that there is also limits on the depth of the tread and the amount of 'crowning' and uneven wear that can be on the tire. Of course if the overheat plugs blow out that tire is done for.

It may surprise you to know this but most airplane tires in service are retreads. I don't know if there is a limit on the amount of times you can retread them or not.

Any A&P's out there can straighten this out.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
 
Guest

RE: Aircraft tires

Wed Feb 24, 1999 8:04 am

They also turn them around if one side is worn more. As when you come down in a cross wind you land with one wing down so the outsides wear quicker so they turn them around!
Iain
 
FedEx
Posts: 706
Joined: Wed Aug 25, 2004 5:07 pm

RE: Aircraft tires

Wed Feb 24, 1999 9:10 am

I know there is a tread limit put into stone by the
FAA,kind of like cars here in the states. You can't
have bald tires. I'm sure Will or some other A&P
will sort this out! Good question! I know out at
Edwards AFB they put hydrogen in the tires!
 
JETPILOT
Posts: 3094
Joined: Tue May 18, 1999 6:40 am

RE: Aircraft tires

Wed Feb 24, 1999 10:05 am

Please!! NO HYDROGEN! Hydrogen is extremely explosive. (Ex. Hindenburg) They use nitrogen thank god. And All commercial aircraft use this.
 
FedEx
Posts: 706
Joined: Wed Aug 25, 2004 5:07 pm

RE: Aircraft tires

Wed Feb 24, 1999 11:56 am

Sorry about that! I meant Nitrogen! I'm still under
some drugs from my surgery yesterday. Maybe
they used hydrogen on me?
 
Guest

RE: Aircraft tires

Wed Feb 24, 1999 12:58 pm

As stated, there are a number of things that affect tire life. underpressure is a killer, tread depth etc. In NZ we can retread up to a maximum of 8 times. But FOD damage usually recks a tire long before.
 
B747
Posts: 259
Joined: Wed May 19, 1999 10:08 pm

RE: Aircraft tires

Wed Feb 24, 1999 1:45 pm

They put nitrogen in them , because nitrogen has no moisture in it. Moisture will corrode the wheel assymbly, causing reduced life of the magnesium wheel. Atleast all Air Force planes use nitrogen. If they need serviced at a place where nitrogen is not available, they can use straight air, but once they get back to a home station they must be drained and refilled with nitro.
At Pope, where not happy, until you're not happy!
 
Guest

RE: Aircraft tires

Wed Feb 24, 1999 7:32 pm

Very interesting thread...

...but does anybody know how many cycles do tires last (on average) before they are changed?

I suppose different aircraft models do wear tyres differently. I heard that a 747 tyre costs as much as 1000$. Is this price acurate?

By the way what "A&P" means, airline pilot?

Regards.

Jesus
 
antonov
Posts: 80
Joined: Tue Jun 14, 2005 11:21 pm

Virgin Atlantic Bullshit

Wed Feb 24, 1999 8:13 pm

Virgin Atlantic wrote :

They also turn them around if one side is worn more. As when you come down in a cross wind you land with one wing down so the outsides wear quicker so they turn them around!
Iain

That is BULLSHIT ! No pilot or Engineer (unless you are almost broke or somewhere in Africa or Russia without extra tires) will take the risk of turning the tires in the example which you gave here above !!
 
v jet
Posts: 757
Joined: Tue May 18, 1999 9:04 am

RE: Virgin Atlantic Bullshit

Wed Feb 24, 1999 8:59 pm

Is it really necesary to be so rude. You can state your point of view without using this kind of language. The thing I like most about this forum is that everyone is civil to everyone else. Lets not change that.
Maurice
 
antonov
Posts: 80
Joined: Tue Jun 14, 2005 11:21 pm

excuse me

Wed Feb 24, 1999 11:35 pm

Sorry for the language ! You are right, I lost control.
Wil not happen again.

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