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No wonder aircraft tyres burst!

nozzer
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No wonder aircraft tyres burst!

What I can't understand is that the landing gear wheel hubs look hot even before they hit the runway. 

https://www.youtube.com/watch?v=ikbrSRTAzgA

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Minivanman
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Re: No wonder aircraft tyres burst!

Just a thought, are they spinning before the hit the ground - only that would warm them up a bit. It does look as if the hub is hot rather than the tyre itself. 

A stationary wheel hitting the deck is going to get more wear than one that is already turning so maybe there is some sort drive mechanism? 


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nozzer
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Re: No wonder aircraft tyres burst!

As far as I know it used to be standard practice to spin the wheels before landing, but I thought that had been abandoned quite a long time ago. Maybe it's been resurrected again.

Minivanman
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Re: No wonder aircraft tyres burst!

Sounds like a good idea. Don't know how many tons are hitting the tarmac but it must be a fair bit.

I'd not like to pay out for new tyres that's for sure! 


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nozzer
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Re: No wonder aircraft tyres burst!

179,000 kg for that aircraft according to the Boeing web site.

Strat
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Re: No wonder aircraft tyres burst!

I have a recollection of reading somewhere that all passenger aircraft take off and land on remould tyres.

It was in response to someone asking if remoulds were safe to use on his car.

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Anonymous
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Re: No wonder aircraft tyres burst!

Do you mean this. It also makes commercial sense considering the cost.

billnotben
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Re: No wonder aircraft tyres burst!

I suppose much depends on the hot-cold range of the picture but as the wheels are tucked into the planes body they have to be warmer than the outer skin. Especially the metal hubs as they are bound to hold any heat longer.

FurstyFerret
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Re: No wonder aircraft tyres burst!

The brakes / wheels get hot on the taxi out and then are tucked safely away in the belly of the aircraft.  They don't really cool down much over the course of the flight and are often still above 100C after several hours.  A heavy aircraft with a long taxi in hot conditions can easily see brakes reach 300C before take off.  

 

After landing the brakes regularly exceed 500 degrees.

nozzer
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Re: No wonder aircraft tyres burst!

Not quite as hot as this though, I hope!

https://www.youtube.com/watch?v=Mr4V680UQ-k

7up
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Re: No wonder aircraft tyres burst!

The last aircraft tyre I remember hearing had burst burst a tyre was on concorde.

Does it really happen more often? I'd be surprised as a burst tyre could bring down a plane as it did with concorde. I thought the tyres were replaced on a regular basis to avoid such risks.
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twocvbloke
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Re: No wonder aircraft tyres burst!


@7up wrote:
The last aircraft tyre I remember hearing had burst burst a tyre was on concorde.

 

And even then it was due to negligent airport management in keeping the runway clean & clear...

 

Aviation is one of them few industries where preventative maintenance is commonplace, so tyres are inspected while the plane is sat at the terminal, if they're good, it goes off for another flight, if not, they ground the plane 'til it gets new boots, which given the nature of the industry is probably done pretty sharpish to prevent any repeat of the concorde crash...

Mav
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Re: No wonder aircraft tyres burst!

twocvbloke wrote:

which given the nature of the industry is probably done pretty sharpish to prevent any repeat of the concorde crash...

From what I understand it's probably as much to do with the fact that a plane on the ground is losing money as safety.

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nozzer
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Re: No wonder aircraft tyres burst!

Tyres burst with regular monotony. If you keep an eye on airlive.net or pprune.org.uk you'll see incidents reported quite often. They don't make the news unless there are repucussions, which fortunately is not often.