B777 min. maneuving speed jump thru FL210
Hi all....
I have noticed that when climbing thru approximately FL210 when heavy, the minimum maneuvering speed (top of the amber tape) suddenly jumps up 20 or 30 knots. The other day we were climbing at 280 knots and the tape jumped up and touched our current speed. What causes this? Can't find anything in the books. Thanks Cropduster.