Takeoff at heavy weight
Airbus example ahead.
If I have a choice between Flaps 2 and lower V speeds or Flaps 1 and higher V speeds to lift a heavy weight, which one would be the preferred configuration? Assume a 10000' runway and no obstacles. |
No obstacles so consider a NADP2 for a higher climb speed and a quicker transition to clean configuration.
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The optimum configuration from FOVE / LPC NG / FlySmart w/Airbus is the one giving the highest P(lim)TOW. That's how it works on the inside.
Normally this is observed by the highest flex temperature, a standard A320 (27.5k) will indeed FLEX at MTOW for the given conditions. Unable to run the calcs now, but with zero obstacles it is always 1 unless < 2400m or so. |
If there are no obstacles, and assuming you are not field limited, the lowest flap setting will be the best. Least amount of drag, and the best performance during initial climbout.
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Originally Posted by Altcrznav
(Post 11194274)
Airbus example ahead.
If I have a choice between Flaps 2 and lower V speeds or Flaps 1 and higher V speeds to lift a heavy weight, which one would be the preferred configuration? Assume a 10000' runway and no obstacles. Ref. FCOM-PER-TOF Considerations |
DU not found?
But this exists: PER-TOF-THR-FLX-40 Takeoff Procedure, saying the same thing. https://cimg7.ibsrv.net/gimg/pprune....35f63b9f44.png |
That is a good reference chart for any airplane, just use relevant flap settings and whatever reduced thrust is called on your type.
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