Carbon Brakes versus Steel.
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After a Google search some interseting items,
http://www.messier-bugatti.com/rubri...que=47&lang=en
https://www.edwards.af.mil/archive/2...on_brakes.html
http://www.geocities.com/profemery/a...on_brakes.html
It appears to have been a previous subject here on pprune.
http://www.messier-bugatti.com/rubri...que=47&lang=en
https://www.edwards.af.mil/archive/2...on_brakes.html
http://www.geocities.com/profemery/a...on_brakes.html
It appears to have been a previous subject here on pprune.
Last edited by allthatglitters; 14th Dec 2006 at 02:26.
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I would like to add here, having seen them perform on the A310 and the B744, they are pretty good being lighter and are 'sensitive' to the amount of application of braking effort and are also sensitive at lower temp [ its inherent characteristics] single smart effort of braking would build up less heat / temp then say a shy braking effort all the way.
They are also sensitive to bad keeping, eg: if cold water is poured on heated brakes for quick cooling, they are known to warp. It needs or prefers cooling fans or else a gentle cooling with or without some conditioned air.Even the messier-bugatti site is silent on this.
They are also sensitive to bad keeping, eg: if cold water is poured on heated brakes for quick cooling, they are known to warp. It needs or prefers cooling fans or else a gentle cooling with or without some conditioned air.Even the messier-bugatti site is silent on this.
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I would like to add here, having seen them perform on the A310 and the B744, they are pretty good being lighter and are 'sensitive' to the amount of application of braking effort and are also sensitive at lower temp [ its inherent characteristics] single smart effort of braking would build up less heat / temp then say a shy braking effort all the way.
They are also sensitive to bad keeping, eg: if cold water is poured on heated brakes for quick cooling, they are known to warp. It needs or prefers cooling fans or else a gentle cooling with or without some conditioned air.Even the messier-bugatti site is silent on this.
They are also sensitive to bad keeping, eg: if cold water is poured on heated brakes for quick cooling, they are known to warp. It needs or prefers cooling fans or else a gentle cooling with or without some conditioned air.Even the messier-bugatti site is silent on this.
Otherwise, yep, carbon much lighter, less brake fade and heat accumulation, but very prone to softening/degradation from oil absorption/contamination etc.
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h73KR... you taking a step back on those counts is understandable [ water therapy I call it - sic] the ground reality if you have flown in the mid-east and SE Asia, this is what we could encounter for quick cooling... unless its insisted none such therapy and the delay is acceptable in the absence of cooling conditioned air.
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h73KR... you taking a step back on those counts is understandable [ water therapy I call it - sic] the ground reality if you have flown in the mid-east and SE Asia, this is what we could encounter for quick cooling... unless its insisted none such therapy and the delay is acceptable in the absence of cooling conditioned air.
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Flown 757s with both. Carbon more 'fierce' during taxy out braking, better on landing when hot. A point to note is that autobrake setting 1 meant that they were not heating up sufficiently towards optimum and therefore wearing more quickly, so the company made it SOP to use a minimum of autobrake 2.
PP
PP
Some of the videos here http://www.aircraftbraking.com/SUP_Videos.php are quite good but they seem to want some drinking vouchers in exchange.
I believe the British Aerospace test pilots aledgedly found some interesting data when testing carbon brakes on the 146/RJ which is worth listening to. It was something along the lines of they are not very good and suffer excessive wear up to about 250 Deg C (Quite normal), are effective from 250 to around 600 Dec C, but then fade quite rapidly as the carbon gas pressure builds up between the plates at very high temperatures. However this is third hand information so do not use it as training or operational information. Perhaps a TP with better knowledge than I would care to comment?
I believe the British Aerospace test pilots aledgedly found some interesting data when testing carbon brakes on the 146/RJ which is worth listening to. It was something along the lines of they are not very good and suffer excessive wear up to about 250 Deg C (Quite normal), are effective from 250 to around 600 Dec C, but then fade quite rapidly as the carbon gas pressure builds up between the plates at very high temperatures. However this is third hand information so do not use it as training or operational information. Perhaps a TP with better knowledge than I would care to comment?
