RedHillPhill;
A brilliant bit of fishermans' tall tales! The 135 has two engines driving one set of rotors through free power turbines into a combiner box then the main gear box, (at least the one I spent 3 hours 40 min in today does)
There are no clutches, pulling up the collective too early in an auto can slow the blades dramatically (enough to totally screw your day) pulling back on the stick tends to "g load" the rotor disc and increase the rotor rpm.
me! I thought the BBC was bad, maybe they're getting their info from angling sites now.
Doubtless others will criticise my description, but I'm trying to keep it simple for the care in the community cases who have come out of the woodwork again.