Happy-flier From Canada, joined Dec 1999, 298 posts, RR: 0 Posted (3 years 5 months 2 weeks 6 days 18 hours ago) and read 2536 times:
An interesting thing has come to my attention as I browse photos of MD-11s in action. It appears that while the MD-11 is able to use both inboard and outboard ailerons simultaneously as flaperons, to augment flap function much as the 777 does, in some cases, it is clear that they are not used, and the MD-11 wing in those cases appears to function exactly as its predecessor, the DC-10 (i.e. just flaps, while inboard and outboard ailerons are flush).
Why is this? What flight management decision governs whether a crew will program the system to droop ailerons for flap augmentation, or not?
May the wind be always at your back . . . except during takeoff & landing.
DL_mech From United States of America, joined Feb 2000, 1761 posts, RR: 10 Reply 1, posted (3 years 5 months 2 weeks 6 days 17 hours ago) and read 2518 times:
Not all MD-11 a/c are equipped with it ( I think it was a Service Bulletin)..IIRC, If you look on the Ident page of the FMS it is either "MD-11" or "MD-11 DEF AIL"
It's not going to the Moon.....It's just going to California
Happy-flier From Canada, joined Dec 1999, 298 posts, RR: 0 Reply 2, posted (3 years 5 months 2 weeks 6 days 17 hours ago) and read 2503 times:
Interesting. I had another thought after posting: Maybe using more trailing edge flap but no aileron deflection (e.g. 30º flap for takeoff) would mean that a tailstrike on takeoff would be less likely than if you used, say, 10º flap + aileron deflection.
Just a thought.
May the wind be always at your back . . . except during takeoff & landing.
113312 From United States of America, joined Apr 2005, 537 posts, RR: 1 Reply 3, posted (3 years 5 months 2 weeks 6 days 11 hours ago) and read 2407 times:
At our airline, most MD11 takeoffs are with Flap 25 and no aileron deflection. Note that the leading edge slats on the MD11 have two positions: Extended and Retracted.
On the DC10-30, the slats have 3 positions: Retract, Takeoff, and LDG.
Most takeoffs in the DC10 (MD10)-30 are with Flaps 20.
CosmicCruiser From United States of America, joined Feb 2005, 2212 posts, RR: 16 Reply 4, posted (3 years 5 months 2 weeks 6 days 11 hours ago) and read 2401 times:
As far as I know they came with it but some aren't used. We used them for a short time after I chkd out in the MD-11 and then they were disabled due to maint costs.
Bri2k1 From United States of America, joined Dec 2004, 988 posts, RR: 4 Reply 5, posted (3 years 5 months 2 weeks 5 days 21 hours ago) and read 2216 times:
Quoting 113312 (Reply 3): At our airline, most MD11 takeoffs are with Flap 25 and no aileron deflection.
I must be misunderstanding this. No aileron deflection? What if there's a crosswind?
CosmicCruiser From United States of America, joined Feb 2005, 2212 posts, RR: 16 Reply 6, posted (3 years 5 months 2 weeks 5 days 21 hours ago) and read 2214 times:
Quoting Bri2k1 (Reply 5): must be misunderstanding this. No aileron deflection? What if there's a crosswind?
He's talking about "drooped" ailerons. Nothing to do with a x-wind.
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