More Direct Lift Control nonsense
I was bored sitting in the back end of a 777 mid-ocean the other day, and I got thinking. Ok, the L1011 has DLC using spoilers and from reading some old threads in ‘Tech Log’ I have learnt that the L1011-500 and A320 can utilize symmetrical aileron movement for gust (load) alleviation.
Why not design FBW aircraft (with both inboard and outboard ailerons) to use symmetrical inboard aileron movement downwards on rotation for take-off to increase lift directly, allowing a lower deck-angle and thus reducing the chance of a tail-strike. Drag would not be increased significantly due to the fact the ailerons would be in the neutral position for most of the take-off run until rotation. Roll control could be handled by the outboard ailerons and spoilers, perhaps at say 200ft RA normal roll control could be returned…. Surely in long aircraft such as the A340-600 this could be useful?
Any comments?