I am sorry I don't know more than I wrote in the thread. But I am also eager to learn and will not hold back any information when I get the full written report.
Thank you Chris.
I hoped that someone else would jump in and try to answer my question before results of your analysis come to daylight. I've got information that German training material, at least a few years ago, advocated side slips to the side of the forward moving rotor blade. Our training material has been made by that time by good people with good intentions but with limited experience. The German routines, as most developed by that time, have been implemented into our training material and practiced by our instructors.
There are apparently many pilots around that use this method routinely after being taught during elementary training.
No one else in my neighborhood has ever questioned this method, often used for height reduction on approach.
I feel that there is no need for this manoeuvre and use to tell my students to forget this part of the book, especially the detail that advocates side slipping towards forward moving rotor blade.
Help needed to understand.