Originally Posted by
pangolin
You clearly have no clue about aerodynamic loads and the jack screw.
Really?
Relay the procedure to me, as it's been spelled out for decades in each flight manual, for doing a "porpoise maneuver."
How about the procedure for unwanted trim, which really hasn't changed in decades?
There are two essential elements of that procedure that are basic airmanship, and basic to the procedure: once the stab trim has been cut off, don't close the switches again, and a change in airspeed away from trimmed speed will make the matter worse, particularly an increase in speed.
There was no need for a "porpoise maneuver." There was a very definite need to maintain their airspeed, and to not re-engage the stab trim. Fail to support those two needs proved fatal. A "porpoise" maneuver was never necessary to fly the aircraft; it was flyable. The aircrew made it unflyable.