where I did my CHL at Long Beach in about '70 we had a dude there from NASA who was learning on H269's as a sim for harriers.
didn't worry him too much and didn't worry us too much either as he would turn up in anything that was spare on the flight line, DC3, F14, you name it, we'd get a good ghecko at it.
A great dude he was, had been spending quite some time test flying for the large aeroplane wingtip vortex / modifications, had some smick close up air to air photos of the shuttle riding piggy back. I was telling him how we used to do hovering autos from 300 feet, so out he went with his instructor , Monica and frightened each other severely while they wrestled with that idea.