There used to be a bit of a fairy tale with the Whirlwind/S55. When you were grappling for lift climbing vertically out of a clearing in Borneo. The theory was that if you slightly stirred the cyclic in an anti-clockwise direction this would encourage the blades, going the same direction, to generate more lift.
I never tried it. The technique I used was to climb almost to the top, then forward cyclic and downwash would would flatten the leaves and branches on the trees so that the rest of the airframe missed it.
A kind of 'tree cushion'.
Last edited by Fareastdriver; 1st May 2017 at 17:57.