I wouldnt try this to you are comforable maintaining a stationary piro upright and inverted and you can flip and roll in place nose in or nose out.


Give right rudder and establish a piro. Setting a dual rate to 80 percent on the rudder allows you to just hold the stick over while you're learning to achieve a constant piro rate.

Then when the tail comes around push the stick over for a right roll and bring it in a clockwise circle. As the helicopter flips over move the collective to negative to maintain altitude.

Keys. Collective management. If you use too much the helicopter will bounce up and down and if the timing is off it will move side to side around the sky. Not enough and you will constantly loose altitude.

Timing the cylic inputs to the rudder so that the helicopter flips at the same point in every rotation.

http://www.littlerotors.com has an article on it and the Alan Szabo Ultimate 3D DVD goes into some good detail.

A cyclic ring helps to keep the cyclic stick out of the corners.