modesto2
Posts: 2669
Joined: Sun Jul 16, 2000 3:44 am

Brake Fans

Sat Jun 26, 2004 10:30 am

Do most airlines equip their aircraft with brake fans? Why or why not?
 
EMBQA
Posts: 7795
Joined: Sat Oct 25, 2003 3:52 am

RE: Brake Fans

Sat Jun 26, 2004 11:00 am

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"
 
G4Doc2004
Posts: 120
Joined: Thu Feb 19, 2004 7:49 am

RE: Brake Fans

Sat Jun 26, 2004 1:04 pm

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
 
Fly2HMO
Posts: 7207
Joined: Sat Jan 24, 2004 12:14 pm

RE: Brake Fans

Sat Jun 26, 2004 2:05 pm

I'm a huge brake fan...


GO BRAKES, GO!!!!

 Big grin
 
fadec
Posts: 45
Joined: Sun Jun 20, 2004 1:27 pm

RE: Brake Fans

Sat Jun 26, 2004 4:47 pm

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.
 
DL_Mech
Posts: 2061
Joined: Fri Feb 18, 2000 7:48 am

RE: Brake Fans

Sat Jun 26, 2004 5:01 pm

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.
 
B747FE
Posts: 217
Joined: Mon Jun 21, 2004 11:09 pm

RE: Brake Fans

Sat Jun 26, 2004 11:47 pm

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"
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: Brake Fans

Sat Jun 26, 2004 11:58 pm

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.
 
SlamClick
Posts: 9576
Joined: Sun Nov 23, 2003 7:09 am

RE: Brake Fans

Sun Jun 27, 2004 11:44 am

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.
 
Minuteman
Posts: 260
Joined: Sat Aug 05, 2000 1:01 am

RE: Brake Fans

Mon Jun 28, 2004 12:26 pm

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.
 
G4Doc2004
Posts: 120
Joined: Thu Feb 19, 2004 7:49 am

RE: Brake Fans

Mon Jun 28, 2004 3:20 pm

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
 
sabenapilot
Posts: 2442
Joined: Sat Feb 26, 2000 6:18 pm

RE: Brake Fans

Tue Jun 29, 2004 6:32 am

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...
 
willo
Posts: 1331
Joined: Fri Dec 12, 2003 10:21 pm

RE: Brake Fans

Wed Jun 30, 2004 12:01 am

The 146 brake fans are electric (we make the motors and impellers that are fitted to the Dunlop units).
 
modesto2
Posts: 2669
Joined: Sun Jul 16, 2000 3:44 am

RE: Brake Fans

Wed Jun 30, 2004 9:59 am

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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