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Kick the fires and light the tyres

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Kick the fires and light the tyres

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Old 26th Aug 2018, 23:26
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Kick the fires and light the tyres

Jet Provost brake fire today rapidly extinguished by the guys from Trumpton towers..... ok Bruntingthorpe..



Jet Provost brake fire by Tony Taylor, on Flickr


JP fire by Tony Taylor, on Flickr
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Old 26th Aug 2018, 23:39
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Hunter wet start, they cancelled the run after shutting it down, one assumes as it was reported they only had two carts fitted it was because they couldn't do a dry cycle to get rid of the rest of the fuel and then another start.


Hunter wet start by Tony Taylor, on Flickr
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Old 27th Aug 2018, 02:15
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If that is a JP3, a brake fire is understandable after the violent acceleration......
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Old 27th Aug 2018, 06:35
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It was the title of the thread that got me hooked. In the late 1960's, I was sent to St Mawgan to hold between BFTS and Oakington.

One day we were put into the 'care' of a Master Engineer to be shown over a Shak.

Being green I asked him what a Flight Engineer did.

'I do the prefight, start and look after the engines and systems'.

I replied.

'So you kick the tyers and light the fires then?'

He then says to me.

'We have had a number of snotty nosed young Pilot Officers through here over the years - so piss off '
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Old 27th Aug 2018, 07:44
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Is that really water he's spraying on to a brake fire?
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Old 27th Aug 2018, 07:51
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Originally Posted by Shackman
Is that really water he's spraying on to a brake fire?
That was my first thought Shackman.

But looking closely at the photo i think it could be powder from a larger reservoir on a vehicle through a hose and lance.

Not really sure.
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Old 27th Aug 2018, 09:23
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Originally Posted by Shackman
Is that really water he's spraying on to a brake fire?
Probably. That can be the best option. Looks to me like the Crash crew are doing a great job.

OAP
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Old 27th Aug 2018, 11:53
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ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
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Old 27th Aug 2018, 12:30
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yes it is water they used!

That’s me in the JP, we had an issue when trying to turn round & taxing back rudder pedals didn’t want to response to the inputs. Then we noticed fire trucks wizzing past and turning round flashing there lights at us.

This was then then the first we knew about the fire!

Turns out it was pad failure that caused the issues.

bt a great response from the AFS.

and no major damage caused!

After the fire was out they then again sprayed it with water to help cool the gear down and stop it reigniting
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Old 27th Aug 2018, 13:42
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I couldn't understand the foam application after it was out, it actually self extinguished for a period as you were taxying, I have a lot of shots of it if you want any.


JP fire taxy by Tony Taylor, on Flickr


JP foam by Tony Taylor, on Flickr

Last edited by NutLoose; 27th Aug 2018 at 14:07.
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Old 27th Aug 2018, 14:07
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JP fire taxy side on by Tony Taylor, on Flickr
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Old 27th Aug 2018, 14:15
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I have several photos of the guy putting it out, you can see him setting up a water mist around the wheel bouncing it off the distant ground, the door and tyre and also the ground under the wing creating the mist cloud around the fire, cooling and extinguishing it.
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Old 27th Aug 2018, 14:22
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Originally Posted by Wander00
ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
The crash crew look to be doing it perfectly, approach on the 45 degree angle, stay back. I suspect that is brake fluid burning from a piston/seal leak onto the hot brake? Great job by the fire crew.

OAP
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Old 27th Aug 2018, 16:02
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Originally Posted by Wander00
ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
Agree, but at 3.30/4 seems a good compromise from metal or rubber and gives a good aspect for the metal.
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Old 27th Aug 2018, 16:37
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How about CO2 ? (nothing to clear up).

(Part time Fire Officer at Linton in the Dark Ages - 1962)
 
Old 27th Aug 2018, 16:51
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Thermal shock using CO2 could cause the brake disc to explode.
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Old 27th Aug 2018, 17:34
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You'd have to get pretty close to the fire to use CO2.
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Old 27th Aug 2018, 17:53
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ISTR that the choice du jour for brake fires was dry-powder as it deprived the fire of oxygen, thus controlling the conflagration without creating thermal shock.
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Old 27th Aug 2018, 19:48
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dry powder is good for not creating thermal shock, which can shatter the wheel or brake components, however its got no cooling effect. once fire occurs its got to be extinguished and prevented from escalating. this is what the fire crew did, from as safe a position as possible. the foam may possibly be residue from around the vehicles pump, left in a hose, or actually produced intentionally. it makes water "greasier", more free flowing and capable of dealing with a liquid fire should a pipe or tank rupture.
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Old 27th Aug 2018, 19:48
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goss,,do you not have a radio to/from fire crew..?
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