"Mxsmanic" wrote in message
...

A zero-G parabola is a ballistic trajectory; it always involves
acceleration
towards the ground (in the direction of gravity) at exactly 1.0 G. That's
how
it produces the "zero-G" effect.

This being so, you cannot change the acceleration of the aircraft along
the
vertical axis without losing the zero-G effect.

Essentially, if you fire a cannonball next to the aircraft, your aircraft
needs to follow the same path as the cannonball in order to become
"weightless."


Obviously,,, but it still has "zip" to do with reducing power to avoid
accelerating excessively in the dive.