MD11Engineer From Germany, joined Oct 2003, 14026 posts, RR: 62
Reply 3, posted (10 years 3 weeks 3 days 22 hours ago) and read 4442 times:
Douglas does it too, on the MD-11, but you can only move them down (controlled by the FCCs)only if there is weight on the wheels and spoilers are down. e.g. the plane is in take off configuration for a little extra lift.
Starlionblue From Greenland, joined Feb 2004, 17043 posts, RR: 66
Reply 7, posted (10 years 3 weeks 3 days 1 hour ago) and read 4121 times:
Ah, no flaps on Concorde. I guess it depended entirely on angle of attach and thus had elevons.
In fact, now that I check (bad me for not doing this earlier) this drawing http://www.concordesst.com/inside/8.html has lables for "elevon" (88) on the outboard surfaces while the inboard surface is labeled "elevator" (77).
"There are no stupid questions, but there are a lot of inquisitive idiots."
S.p.a.s. From Liechtenstein, joined Mar 2001, 967 posts, RR: 2
Reply 10, posted (10 years 2 weeks 4 days 15 hours ago) and read 3760 times:
From what I understand, the deflected ailerons (name givem by McDD to them) only work for take-offs not landings.
IIRC from my MD11 flight dispatch days, this system increased max take-off weight in 3 tons. Or putting it on a reversed order, I had to deduct 3 tons from the mtow given by my runway analysis charts, if it was inop.
Mr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 21
Reply 13, posted (10 years 2 weeks 1 day 6 hours ago) and read 3514 times:
It happens to other Airbuses and Boeings as well. I think basically the control surfaces are powered by hydraulics and once they're turned off there's no force in positioning the control surfaces. And the A320s (as well as the B777s) have some pretty light rudders so it just deflects with the wind.
Bahadir From United States of America, joined Oct 2001, 1791 posts, RR: 10
Reply 15, posted (10 years 2 weeks 1 day ago) and read 3455 times:
As soon as the gear leaves the ground you lose some lift? What kind of sense does that make?
It does make perfect sense. The airplane loses some lift as it gets away from the ground due to the reduction in ground effect. You don't notice that because increased speeds and the thrust makes up for it..
310_engineer From Belgium, joined Dec 2000, 165 posts, RR: 0
Reply 16, posted (10 years 2 weeks 22 hours ago) and read 3435 times:
All Airbus FBW planes have aileron droop - that means all except A300/310
FYI: A310/A300-600 do have a 10° aileron droop.They droop when the Slat/Flap lever move out of the 0° detent. This is from the moment you select slats. Actually the droop command comes from the Kreuger selector valve.
Another info: the A310 was the first commercial aircraft to have FBW systems installed.