9 Plus,
Your scenario of a rescue swimmer+casualty on the wire and operator on the skid should be within CofG. The scenario crab describes is two on the wire and an operator plus instructor in the door.
The 40% increase is in USEFUL payload I.e you had a useful payload of 400kg it is then increased by 160kg.
Another deciding factor for performance is whether your controlling authority allow you to use 30 sec power or 2 min power in your contingency planning.
The performance will also be affected depending if TU206 has been embodied giving increased 2 minute OEI power.
Crab,
How do MFTS fit into the above two statements?
FNW