Superpilot, a lot of pilots mistake movement of VLS because it is actually Alpha Prot and Alpha max moving on the tape and the size of the margin between VLS and Alpha Prot changing.This creates an optical illusion. I had it proved to me on a recent sim. Alpha Prot and Alpha Max are dynamic whereas VLS is based upon FMS weight data and the weight will not be changing rapidly.
Can anybody explain the slight roll that is produced if the speedbrakes are extended and Flap 2 is selected? The Fcom gives the following but what causes it?
"When the speed brakes are deployed, extending the flaps beyond FLAPS 1 may induce a slight roll movement, and in calm conditions a small lateral control asymmetry may remain until disturbed by a control input or by an atmospheric disturbance."
Last edited by tubby linton; 24th Nov 2014 at 23:21.