Shytorque when I left the RAF and went to a company as a contract engineer, i was watching a Gazelle burning and turning outside the open hangar doors, it was there for ages, asking what was happening I was told it was out on a ground run..I stood there in awe...
When the occupants came in ( two engineers) I asked them politely what they would have done if they had got ground resonance... their faces glazed over as they asked me "what's that?"
Needless to say I suggested they read up on it and ceased doing the turning part of the equation for all our sakes, I had visions of rotor blades bouncing in through the open doors..
BTW in the USA you can get a helicopter licence simply for hovering only, designed for engineers I believe doing ground runs etc.
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Last edited by NutLoose; 10th Mar 2023 at 22:11.