"mike regish" wrote:
The few that I've done, and it is only a few, the g forces were
noticeably less at the top of the roll. I was still pressing into the
seat, but not as much. Just as in a loop, the g forces are lower at
the top of the loop.

That seems reasonable. I should try to clarify that the maneuver I
described is what I believe is theoretically possible.