About 27 clips in 1 min.
First Half: Fast touch and goes with out any damage
Second half: Same touch and goes with random damage
The first part I like. I like that if you gently touch a slippery surface nothing really happens. But gently touching the ground and exploding doesnt make much sence. Should be more consistent and closer to the first part.
I think this is very silly, a helicopter is a very delicate piece of kit, you clip the ground above 20kts and you will crash spectacularly, especially with skids. With a wheeled helicopter it is much easier but would still cripple the under carriage.
The speeds you were hitting those ridges was too high and would invariable result in a spectacular crash.
These things are really on a knife edge, the slightest instability and they destroy themselves due to the forces involved.
https://www.youtube.com/watch?feature=player_detailpage&v=3QgXQ39aL5I
https://www.youtube.com/watch?feature=player_detailpage&v=nX5ZxQEWneI
https://www.youtube.com/watch?feature=player_detailpage&v=N0E_UASBs7U
Bottomline - Helicopters are dangerous enough on their own when operating within their own performance limits, doing the peoples Elbow on the ground with your Helicopter is very / I mean Extremely dangerous!
https://www.youtube.com/watch?feature=player_detailpage&v=hc4pEXRdDvo
Alot of these helicopters land properly and then spiral out of control, Helicopters are wildly unpredictable when you start hitting things with them.
Helicopter + Hitting anything = 99.99% chance of Crash
I would agree with mwinciboo - your videos show how choppers can withstand way too hard collisions with the ground, as described in #1185.