Merlin negative G cutout too quick?

[Crumpp]

In game, even with minor moments of low/negative G the prop will grind to halt. So the question is really - what is fitted to this aeroplane?

The relative wind will drive the propeller and it will continue to spin. A CSP will act as huge airbrake immediately slowing the airplane down at a rapid pace until there is not enough wind to drive the propeller.

A fixed pitch propeller will slow the plane down at a much slower pace.