Brake fans A330/320
Join Date: Jun 2013
Location: Or-E-Gun, USA
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They Go Off
As far as I know, when the "Squat Switch" says "No Load" on the gear, the fans go off. I'm sure that the do not operate when the gear is up and the doors are closed.
Not sure here, but they may stop even earlier, perhaps when TO power is applied. In most cases, when temps so indicate, the fans should continue to operate during routine taxi. It is an AB, so *more than one* event or condition may trigger the on/off for brake cooling fans.
>>my own question<< All A320 series that I've seen have brake fans, Yet I understand that this is a buyer's option. Are these fans standard gear - or are they really an optional, extra cost item? Does anyone know?
Not sure here, but they may stop even earlier, perhaps when TO power is applied. In most cases, when temps so indicate, the fans should continue to operate during routine taxi. It is an AB, so *more than one* event or condition may trigger the on/off for brake cooling fans.
>>my own question<< All A320 series that I've seen have brake fans, Yet I understand that this is a buyer's option. Are these fans standard gear - or are they really an optional, extra cost item? Does anyone know?
Join Date: Mar 2006
Location: AUSTRALIA - CHINA STHN
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Ideas on brakes
I think there are a few reasons to switch them off before takeoff even though they do stop airborne.
I think FOD ingestion is one ( maybe ) but probably more importantly are the gyro effects on retraction( hence wheel brake application on retraction) and running electric motors in the gear bay with potential hydraulic leaks/ vapour etc if there is a malfunction.
All just my ideas... Nothing written as far as I have come across....If anyone has better ideas happy to think about them.
Of course having brake fans running would keep the stowaways in there warm and cosy longer too.... :-(
I think FOD ingestion is one ( maybe ) but probably more importantly are the gyro effects on retraction( hence wheel brake application on retraction) and running electric motors in the gear bay with potential hydraulic leaks/ vapour etc if there is a malfunction.
All just my ideas... Nothing written as far as I have come across....If anyone has better ideas happy to think about them.
Of course having brake fans running would keep the stowaways in there warm and cosy longer too.... :-(