Where has this urban myth come from? How do you pull out of a dive with 1 g, or how do initiate the climb, using 1g? A barrel roll is not a 1 g manouevre
212Man ---it is a 1 g maneuver provided that while you're rolling in at a rate in proportion to the rate at which you are falling back to level height
verify entry speed ---35 degrees nose-up then bring'er round
but it can easy turn into a +???g and -???g maneuver
btw: never 'push on' negative g
just keep rolling and recover upright
PA