It was a genuine pleasure to hear someone who has spent so long developing helicopers discuss the technical issues in depth. It was an even greater pleasure to hear the enthusiasm for the simple design approach still burning strong.
The investigation to eliminate tail rotor shaft bearings (damper to control 1st and 2nd flexural eigenmodes) was a nice bit of attention to detail. The explanation of the cyclic design to allow more movement to desensitise lateral control showed lateral thought. Interesting discussion about engines too...