Having just left the A330/340 and now started on the 747, I wanted to bring this to the top to see if there was any more information available.
The reason being during crosswind takeoffs the Airbus required virtually no aileron input into wind, but the 747 requires considerable into wind aileron especially during rotation and landing.
I'm particularly interested in finding out information about spoiler lift and takeoff performance.
I came across two schools of thought regarding spoiler lift on the Airbus.
1. Put what's required in as spoiler lift is accounted for during flight testing.
2. Keep the roll input to a minimum to avoid spoiler lift.
Also two on the 747 which is to put 1 unit of roll in per 10kts of crosswind & don't exceed about 1 unit as the spoilers lift.
Note: The spoilers lift at 8 degrees which is about 1 unit of aileron trim.
http://www.!!!!!!!!!!!!!!/open.file/841191/L/
Both flight manuals mentioned when the spoilers lift but neither seem to commit to a take off technique, other than keep the wings level.
Any further information would be greatly appreciated.
Regards SMOC.
Video of crosswind landings (just for interest)
http://www.linhadafrente.net/bin/Pousos.wmv