Parkie, can you explain to me why it is that when an airliner comes into land you often see of videos from behind that the elevators pulse up in a pumping motion. So when Concorde used to land it's Elevons would repetitively and continually pump up. Are the pilots inputting these pumping inputs or are the computers doing it to the extent that whatever position they hold the yoke or side stick, the computers will pump the elevators etc to give the right amounts of holding the tail in position in the flare. In lighter non fly by wire aircraft , control inputs are obviously proportional, but maybe this isn't the case in airliners where due to weights involved pumping is the only way to maintain the moment arc and keeping the aircraft in the flare before touch down.
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Originally Posted by struth
