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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..
https://farm2.staticflickr.com/1885/...28935533_c.jpg Jet Provost brake fire by Tony Taylor, on Flickr https://farm2.staticflickr.com/1863/...934f0790_c.jpg JP fire by Tony Taylor, on Flickr |
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.
https://farm2.staticflickr.com/1849/...890be43b_c.jpg Hunter wet start by Tony Taylor, on Flickr |
If that is a JP3, a brake fire is understandable after the violent acceleration......
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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 ' |
Is that really water he's spraying on to a brake fire?
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Originally Posted by Shackman
(Post 10234158)
Is that really water he's spraying on to a brake fire?
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. |
Originally Posted by Shackman
(Post 10234158)
Is that really water he's spraying on to a brake fire?
OAP |
ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
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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 |
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.
https://farm2.staticflickr.com/1842/...bea7bdf2_c.jpg JP fire taxy by Tony Taylor, on Flickr https://farm2.staticflickr.com/1855/...706d54bd_c.jpg JP foam by Tony Taylor, on Flickr |
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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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Originally Posted by Wander00
(Post 10234352)
ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
OAP |
Originally Posted by Wander00
(Post 10234352)
ISTR the instruction was to be in line with the tyre to be shielded from an exploding wheel
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How about CO2 ? (nothing to clear up).
(Part time Fire Officer at Linton in the Dark Ages - 1962) |
Thermal shock using CO2 could cause the brake disc to explode.
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You'd have to get pretty close to the fire to use CO2.
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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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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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