Posts: 865
Joined: Thu Apr 22, 2004 9:32 am

747-400 Flap Settings

Sun Mar 27, 2005 5:11 am

Hey all, I would like to know what is the most widely used or optimal flap settings for a 747-400 on takeoff. I know loads will probably be a factor.
Posts: 263
Joined: Sun Feb 13, 2005 11:05 pm

RE: 747-400 Flap Settings

Sun Mar 27, 2005 5:19 am

I think they set the flaps to 10. You should try asking in the Tech/Ops forum.
Obviously a Virgin Atlantic fan!!!
Posts: 3371
Joined: Sun Mar 28, 2004 6:06 pm

RE: 747-400 Flap Settings

Sun Mar 27, 2005 12:38 pm

Flaps 10 or Flaps 20 are the takeoff settings on the -400. The selection of flaps may be driven by company procedures, temp, runway length, obstacles. The list is endless.

Landing flaps are 25 or 30.
Fly fast, live slow
CX Flyboy
Posts: 6062
Joined: Sun Dec 26, 1999 6:10 pm

RE: 747-400 Flap Settings

Sun Mar 27, 2005 12:45 pm

Flap 10 or Flap 20 is normally used based on conditions such as weight, runway length, temperature, altitide etc...
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Joined: Tue Dec 30, 2003 5:30 am

RE: 747-400 Flap Settings

Sun Mar 27, 2005 2:54 pm

As far as I know, BA uses 20 most of the time for takeoff.
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Joined: Wed Nov 03, 1999 3:54 pm

RE: 747-400 Flap Settings

Mon Mar 28, 2005 11:14 am

SOP at Qantas is Flap 20 for all takeoffs.
CX Flyboy
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Joined: Sun Dec 26, 1999 6:10 pm

RE: 747-400 Flap Settings

Tue Mar 29, 2005 12:04 am

We used to use Flap 20 as standard as well, but they introduced a computer system to calculate takeoff performance settings so that the figures can be more precises, and the computer is capable of calculating many more variables than a pilot can, so they introduced F10 takeoffs as well for us.

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