Hi Bill,
Thanks for the info on the gyro rotor, I understand now when you tilt the mast or rotor shaft , blade pitch is automatically changed 90 deg to your intended tilt. thanks.
Another question: what difference does it make if the rotor rotation is clockwise or counter clockwise , I dug out my org. rotor blades and plans for my Chippewa four and discovered that the plans call for clockwise rotation blades,and I had made the org blades counter clockwise ( those were the blades it flew with) . new blades I tried since then have all been clockwise,and they would spin up, but would not lift off .Thanks.

Earl.