To: tgrendl
I would like to add to one of your statements.
It seems as if this is a repeated cycle of development in most helicopters (or any other complex systems) that make it to the flightline (or the road or, whatever). Idea, refinement, mathematical modeling, refinement, scaled modeling, refinement, full scale, testing, refinement, envelope creation, production and final wringout of overlooked problems by the operator.