I’ve never done a RW loop but have rolled inverted and pulled through (from below 40 kts) and bunted 90 degrees nose down, rolled 180 and pulled out. In a 5 bladed Eurocopter product.
Next thing you know 212Man shall attempt to convince us it was all done on purpose and not merely because the AFCS kicked off.
Helicopters tend to accelerate rather quickly when pointing straight down like something akin to dropping a set of streamlined car keys.
Ever peg the VSI?