Really 4 G in a Robin at the TOP of a loop, what is powering it ??????? a gas turbine.
In my T28 with 1400 HP I enter a loop at 4 G 230 Knots and arrive at the top at 110 if I get it right and just G positive , I must be doing something wrong, Maybe I need new knowledge on this Aeros stuff, but I certainly run out of energy at thetop of the loop, funny the Extra 300 I fly does the same thing, must be technique.