Crab,I used to fly a rigid-rotor Scout,with a Lynx copy head,but Scout blades,fully instrumented with strain-gauges and camera on top..Used for `agility` testing,but the FTE`s were not keen on too much `expressionism` being applied.Also used for deck-landing stress measurements,on the `rolling deck which could go to +-20*,with skids..for the Navy...!