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Aircraft tires  
User currently offlineGopal From United States of America, joined Jun 1999, 113 posts, RR: 0
Posted (15 years 7 months 1 day 13 hours ago) and read 2110 times:

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?

11 replies: All unread, jump to last
 
User currently offlineL-188 From United States of America, joined Jul 1999, 29799 posts, RR: 58
Reply 1, posted (15 years 7 months 1 day 13 hours ago) and read 2111 times:

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.
User currently offlineVirgin Atlantic From , joined Dec 1969, posts, RR:
Reply 2, posted (15 years 7 months 1 day 11 hours ago) and read 2110 times:

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


User currently offlineFedEx From , joined Dec 1969, posts, RR:
Reply 3, posted (15 years 7 months 1 day 9 hours ago) and read 2110 times:

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!


User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 4, posted (15 years 7 months 1 day 8 hours ago) and read 2112 times:

Please!! NO HYDROGEN! Hydrogen is extremely explosive. (Ex. Hindenburg) They use nitrogen thank god. And All commercial aircraft use this.

User currently offlineFedEx From , joined Dec 1969, posts, RR:
Reply 5, posted (15 years 7 months 1 day 7 hours ago) and read 2110 times:

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


User currently offlinewalshy From , joined Dec 1969, posts, RR:
Reply 6, posted (15 years 7 months 1 day 6 hours ago) and read 2110 times:

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.


User currently offlineB747 From United States of America, joined May 1999, 245 posts, RR: 2
Reply 7, posted (15 years 7 months 1 day 5 hours ago) and read 2110 times:

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!
User currently offlinejbrezmes From , joined Dec 1969, posts, RR:
Reply 8, posted (15 years 7 months 23 hours ago) and read 2110 times:

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


User currently offlineAntonov From Croatia, joined Jun 2005, 0 posts, RR: 0
Reply 9, posted (15 years 7 months 22 hours ago) and read 2112 times:

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 !!


User currently offlineV jet From Australia, joined May 1999, 719 posts, RR: 2
Reply 10, posted (15 years 7 months 22 hours ago) and read 2110 times:

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


User currently offlineAntonov From Croatia, joined Jun 2005, 0 posts, RR: 0
Reply 11, posted (15 years 7 months 19 hours ago) and read 2110 times:

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


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