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747-400 Flap Settings  
User currently offlineWdleiser From United States of America, joined Apr 2004, 961 posts, RR: 4
Posted (9 years 3 weeks 3 days 4 hours ago) and read 15662 times:

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.

6 replies: All unread, jump to last
 
User currently offlineVS74741R From United Kingdom, joined Feb 2005, 272 posts, RR: 0
Reply 1, posted (9 years 3 weeks 3 days 4 hours ago) and read 15654 times:

I think they set the flaps to 10. You should try asking in the Tech/Ops forum.


Obviously a Virgin Atlantic fan!!!
User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 2, posted (9 years 3 weeks 2 days 20 hours ago) and read 15519 times:

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.


User currently offlineCX flyboy From Hong Kong, joined Dec 1999, 6533 posts, RR: 55
Reply 3, posted (9 years 3 weeks 2 days 20 hours ago) and read 15506 times:

Flap 10 or Flap 20 is normally used based on conditions such as weight, runway length, temperature, altitide etc...

User currently offlineArmitageShanks From UK - England, joined Dec 2003, 3552 posts, RR: 15
Reply 4, posted (9 years 3 weeks 2 days 18 hours ago) and read 15388 times:

As far as I know, BA uses 20 most of the time for takeoff.

User currently offlineAJ From Australia, joined Nov 1999, 2381 posts, RR: 24
Reply 5, posted (9 years 3 weeks 1 day 22 hours ago) and read 15217 times:

SOP at Qantas is Flap 20 for all takeoffs.

User currently offlineCX flyboy From Hong Kong, joined Dec 1999, 6533 posts, RR: 55
Reply 6, posted (9 years 3 weeks 1 day 9 hours ago) and read 15148 times:

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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