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Brake Fans  
User currently offlineModesto2 From United States of America, joined Jul 2000, 2789 posts, RR: 5
Posted (10 years 1 month 6 days 2 hours ago) and read 4519 times:

Do most airlines equip their aircraft with brake fans? Why or why not?

13 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 1, posted (10 years 1 month 6 days 1 hour ago) and read 4511 times:

No....weight being the big reason, and the better quality of newer carbon brake stacks being second.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineG4doc2004 From United States of America, joined Feb 2004, 123 posts, RR: 0
Reply 2, posted (10 years 1 month 5 days 23 hours ago) and read 4491 times:

Actually the BAE-146 used brake cooling fans. If I recall correctly they were hydraulically powered and worked well.


"Failure to prepare is preparing to fail"--Benjamin Franklin
User currently offlineFly2HMO From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 1 month 5 days 22 hours ago) and read 4478 times:

I'm a huge brake fan...


GO BRAKES, GO!!!!

 Big grin


User currently offlineFadec From United States of America, joined Jun 2004, 45 posts, RR: 0
Reply 4, posted (10 years 1 month 5 days 19 hours ago) and read 4447 times:

Some do, some don't. It all depends on the airline, and if they think they are worth it.

The majority don't use them. Normally because of weight and cost to maintain. I can say we hated seeing them... they were total pain to work with.


User currently offlineDL_Mech From United States of America, joined Feb 2000, 1926 posts, RR: 9
Reply 5, posted (10 years 1 month 5 days 19 hours ago) and read 4446 times:

Pan Am A-310's had them, Delta's new ordered A-310's did not.


This plane is built to withstand anything... except a bad pilot.
User currently offlineB747FE From Hong Kong, joined Jun 2004, 230 posts, RR: 4
Reply 6, posted (10 years 1 month 5 days 12 hours ago) and read 4406 times:

Also depend of the rates of cycles and the time between flights.


"Flying is more than a sport and more than a job; flying is pure passion and desire, which fill a lifetime"
User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 7, posted (10 years 1 month 5 days 12 hours ago) and read 4399 times:

I believe that we only turn the fans on when the brake temps are in danger of reaching overheat. The reason is that the rapid cooling of the carbon stack may lead to brittleness. This is on our buses.

User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 8, posted (10 years 1 month 5 days ago) and read 4327 times:

Fly2HMO if you really were a big brake fan, you'd know that the cheer is:
STOP BRAKES! STOP!

That is what brakes do.

Brake fans also work a lot better if you can leave the parking brake off.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineMinuteman From United States of America, joined Aug 2000, 271 posts, RR: 0
Reply 9, posted (10 years 1 month 4 days ago) and read 4250 times:

Where are the fans usually placed and what do they look like? (I'll give a shiny quarter to anyone who find a picture in the database  Big grin )

I would guess the cooling has more to do with the rotors than the pads, although that may reveal my ignorance of most brake setups. It seems like a little bit of convective cooling wouldn't be bad.


User currently offlineG4doc2004 From United States of America, joined Feb 2004, 123 posts, RR: 0
Reply 10, posted (10 years 1 month 3 days 21 hours ago) and read 4230 times:

Not in the Anet database, but here's a link to a very informative page:
http://www.technofan.com/public/technofan/html/en/technofan/produits.php?aid=57&fake=



"Failure to prepare is preparing to fail"--Benjamin Franklin
User currently offlineSabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 47
Reply 11, posted (10 years 1 month 3 days 6 hours ago) and read 4156 times:

It depends really on how much time between flights the airline expects to have with its plane... at SN for instance we didn't have brake fans on the A340, but we did on the A330, because with the A330 we regularly did short hops between African airports and the cooling time (especially in hot climates) was deemed too short to do without...

User currently offlineWillo From United Kingdom, joined Dec 2003, 1352 posts, RR: 12
Reply 12, posted (10 years 1 month 2 days 12 hours ago) and read 4093 times:

The 146 brake fans are electric (we make the motors and impellers that are fitted to the Dunlop units).

User currently offlineModesto2 From United States of America, joined Jul 2000, 2789 posts, RR: 5
Reply 13, posted (10 years 1 month 2 days 2 hours ago) and read 4038 times:

Thanks for the replies, everyone. I was just curious because we use brake fans at JetBlue. Often times, I see the brake fans engaged when entering cockpits - 35 minute Blue turns require these devices...

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