Police helicopter crashes onto Glasgow pub
A 40 ton truck hitting that roof at 70mph would have resulted in more than a bang. I think penetration and collapse would have, in that case been more immediate. No doubt the roof did absorb a huge amount of energy as did deformation if the cab. However, I do not subscribe to the theory that it stopped and dropped from normal flight. More likely control was lost at a point near the bar roof after something else occurred. The toppling described by one eye witness reminded me of a piper tommohawk when fully stalled. Presumably, stationary main rotor blades would still provide some resistance to airflow and /or if turning very slowly result in a tumbling/ bobbing motion?