i agree that turning on the break fans at the gate will cause lots of unwanted sharp and painful noise (like nails on a chalkboard).But then again, for airlines with short turn arounds throughout the day,i would think that this is a necessary discomfort. after landing with autobrakes low and full reverses,exiting a high speed taxiway followed by taxiing to a bay approx 7 mins away with turns which of course require further gentle break usage,by the time u hit the parking bay,one will have to switch it on. not to mention in hot climates. i would think the temps would be around an average of 250++ by then. so if we were to leave the fans off during quick turnarounds,it should go down to (if the temp DOES reduce in the first place) to about 220? and after pushing back and the ramp guys clear out you switch on the break fans,sure there would be ample time for the brakes to cool....but u still got to taxi to the runway...with the same 7 minute taxi with the extra load and fuel now and with the same OAT and not to mention...a 220 C on the brakes. so yeah the fans are on...., but its being used at the same time. i doubt it'll reduce to 100 C or below before T/O. and i know the limitations for airbus is 150 with fans off...but hey,dont think id risk it with an RTO
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dont know about u guys.
