Boeing tyres
Thread Starter
Join Date: Jan 2003
Location: UK
Posts: 97
Likes: 0
Received 0 Likes
on
0 Posts
Boeing tyres
Hi, lost a tyre the other day but it was just the tread section that came off. Are all large aircraft tyres re-treads or is it just my company being cheap?
Thanks
FREDA
Thanks
FREDA
Join Date: Aug 2006
Location: cardiff
Posts: 598
Likes: 0
Received 0 Likes
on
0 Posts
Most all are 'retreads' as you put it, generally allowed to be retreaded up to six times, (the current retread count is marked on the tyre sidewall); however there are some aeroplane types that do not have retreads.
See section 5 of this manual from Goodyear for information on the retreading procedure ----> http://www.goodyearaviation.com/reso...raftmanual.pdf
ttfn
See section 5 of this manual from Goodyear for information on the retreading procedure ----> http://www.goodyearaviation.com/reso...raftmanual.pdf
ttfn
The re-treaded tyres actually last longer than the new ones. Typically the tyres are re-treaded around five times depending on the condition of the carcase.
Regards,
BH.
Regards,
BH.
Join Date: Jan 2006
Location: Georgia, USA
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
FREDA;
On your next walk around, look at the tires, the number of times it has been retreaded will be stamped on the edge of the retread. I have seen as high as R19, meaning that tire had been retreaded 19 times.
On your next walk around, look at the tires, the number of times it has been retreaded will be stamped on the edge of the retread. I have seen as high as R19, meaning that tire had been retreaded 19 times.
Thread Starter
Join Date: Jan 2003
Location: UK
Posts: 97
Likes: 0
Received 0 Likes
on
0 Posts
Well its a long jetlagged night for me, but a tyre (British invention) is still a tyre in English (English invention )
Ill give the Americans the aeroplane though.. not bad
(Cant say airplane, sounds like kid-speak )
Anyway, Ive got the info I needed, so thanks again
FREDA
Ill give the Americans the aeroplane though.. not bad
(Cant say airplane, sounds like kid-speak )
Anyway, Ive got the info I needed, so thanks again
FREDA
FWIW the original English-English was tire, but in the late 18th century it gradually swapped over to tyre - Being an Aussie that is the only correct way to spell it for me.
Oh, and speaking of tyres, all my own work .....
Lost a tyre on the takeoff roll, lost the other on the landing roll .... and indeed most of the wheels there as well.
Oh, and speaking of tyres, all my own work .....
Lost a tyre on the takeoff roll, lost the other on the landing roll .... and indeed most of the wheels there as well.
Also, if it has green dots painted around the side wall near the tread, it's a re-mould. These are the ''Awl Vent Points'' where the air is sucked out of the tyre when the tread is moulded to the carcass.
Join Date: Mar 2007
Location: FL410
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
18 Wheeler - just to be super-pedantic, you're almost right. However it started off as "tyre" in the 15th Century, became "tire" (which is how the colonials got hold of that spelling) in the 17th Century and then reverted to Tyre again in the early 19th century. Probably to disambiguate from the other meaning of tire - eg "to tire of a discussion about spelling".
Well its a long jetlagged night for me, but a tyre (British invention) is still a tyre in English (English invention)
FREDA
And just to be even more pedantic, the pneumatic tyre is a Scottish invention, and here's the intriguing story of the guy who really invented and patented it as UK Patent No 10990, curiously enough under the name of the "aerial wheel":
http://www.historic-uk.com/HistoryUK/Scotland-
History/RobertWilliamThomson.htm
Even more curiously, he is buried only a few yards from my parents.
Jack
(aka Jock)
FREDA
And just to be even more pedantic, the pneumatic tyre is a Scottish invention, and here's the intriguing story of the guy who really invented and patented it as UK Patent No 10990, curiously enough under the name of the "aerial wheel":
http://www.historic-uk.com/HistoryUK/Scotland-
History/RobertWilliamThomson.htm
Even more curiously, he is buried only a few yards from my parents.
Jack
(aka Jock)
Join Date: Feb 2009
Location: North Carolina
Age: 63
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Landings...
And, interestingly (I think, anyway!), your company likely doesn't even 'buy' the tyre in the classic sense. Michelin, for examples, actually sells "landings (per tyre)" thus warrants how many landing cycles you'll get out of 'em, then they take 'em back and re-skin 'em.
So, in most cases in commercial aviation, you're actuality 'leasing' the tire (oops - tyre - I slipped)
So, in most cases in commercial aviation, you're actuality 'leasing' the tire (oops - tyre - I slipped)
And, interestingly (I think, anyway!), your company likely doesn't even 'buy' the tyre in the classic sense. Michelin, for examples, actually sells "landings (per tyre)" thus warrants how many landing cycles you'll get out of 'em, then they take 'em back and re-skin 'em.
So, in most cases in commercial aviation, you're actuality 'leasing' the tire
So, in most cases in commercial aviation, you're actuality 'leasing' the tire
Registered User **
Join Date: Mar 2009
Location: USA
Age: 49
Posts: 480
Likes: 0
Received 0 Likes
on
0 Posts
Most throw treads are not manufacturer defects, often a result of a cut across a rib that usually is cut by running over a taxi light. The less wear you have the higher the centrifical force applied to the tread causing seperation.
The only limitation to the tire it's self in reguard to the 6 retread limit is time, as rubber get's old it deteriorates. Tires that are used more often are actually in better condition as the core rubber likes to bend and flex, it helps maintain it's properties.
In the picture above you can see several layers of cloth, each put down with a new retread. I would have no problem with landing on this tire, there are still many layers of rubber and carcass chord that maintain the actual tires integrity. This tire is actually safer than a new one with a cut in it from groove to groove. Thrown treads at high speeds can do alot of damage such as busting hydraulic lines but usually just beating the hell out of the flaps and gear door.
The only limitation to the tire it's self in reguard to the 6 retread limit is time, as rubber get's old it deteriorates. Tires that are used more often are actually in better condition as the core rubber likes to bend and flex, it helps maintain it's properties.
In the picture above you can see several layers of cloth, each put down with a new retread. I would have no problem with landing on this tire, there are still many layers of rubber and carcass chord that maintain the actual tires integrity. This tire is actually safer than a new one with a cut in it from groove to groove. Thrown treads at high speeds can do alot of damage such as busting hydraulic lines but usually just beating the hell out of the flaps and gear door.
Join Date: Jun 2007
Location: Marion, South Australia
Age: 80
Posts: 183
Likes: 0
Received 0 Likes
on
0 Posts
The image of the MLG with the tyre showing its plies - Had the recap of the tyre come off at a landing and it was wearing into the plies?
Or is that the result of a number of cycles?
Mike
Or is that the result of a number of cycles?
Mike