Necessary for elevator to push down?
Traditional teaching seems to be that
1) the wing pushes up,
2) the elevator pushes down (because the CG is ahead of the wing centre of lift),
3) the turning moment (about the centre of rotation in pitch) due to the elevator (both static and dynamic) needs to exceed the TM due to the wing, for any AOA change - this is called "decalage" I believe
and the above give you a human-flyable aircraft.
However, the other day I spoke to a 757 pilot who says they can load it so that 2) is not met, so long as there is enough elevator authority etc.
Model airplane flyers tell me the same - the models fly just fine with a neutral elevator.
It makes sense to me. Any comments?