Originally Posted by
TeeS
Yep, I've never felt comfortable hanging under that fragile Bolkow rotor head ;-)
As long as you don't hit it with a hammer then it will be fine
Back to metallurgy class for you, Crab!
The Bo105 head is the same as is used in the BK117, and exceptionally strong.
But as a rigid rotor it has quite defined limits for sloping ground ops, and a completely different technique than you would be used to in (for instance) a Sea King. You cannot feed the disk into a level attitude and then pull power to bring up the fuselage with a rigid rotor, nor feed the wheels/skids down on landing, without keeping a very close eye on the MMI. I have no idea of the S92 controls but if they follow some of the limitations of the BK/Bo then it could have been a contributory factor in the OP's link.
It is not as easy to follow through on the AI in a rigid rotor as with an articulated head.