HN39,The vertical wind speeds in this graph have been derived from the recorded AoA, pitch attitude and the aircraft horizontal and vertical speed components. The calculation is very sensitive to small errors in AoA and pitch attitude, and should therefore perhaps not be taken too seriously.
how sensible is your calculation for smal changes in AoA? the elevator flys about 0.1 sec behind the wing, if you fly with CAS 250 into this sort of fast increased updraft the elevator had ca.160 feet/min lower updraft than the wing-----> the result in AoA is about 0.2 deg aditional-diference between elevator and wing
the bird pitch up, as if you pull 0.2 deg, if he fly into this strong updraft
(and visavers pitch down 0.2 deg if you fly outta)
is your calculation so sensible that this effect plays a role???