18roll,
Mate are you a pilot or just trolling. In my nearly 30 years flying both semi-rigid, fully articulated and rigid turbines but never having flown an R44, be bit surprised if you can get Ground Resonance in a Robbie, or any semi-rigid system. Hey Ho, every day a schoolday! Matter of fact going spraying next tour in an Astar, quite susceptible to ground resonance, never had ground resonance once in quite a few years, landing on a raised deck and using electronic calibrated equipment to weigh and measure loads. So no effect Also the odd downwind approach and landing when empty and light, again no effect on equipment.
