All i need now is the balls to try it
Graviman. The answer is i have no idea as yet of what the optimum offset should be. Because we have a situation where each blade is influenced by the preceeding and following blades. All data to date has been acquired by (a) running a test rig where the rotor is ginbal mounted and has been free to teeter, or (b) FDA carried out by a university for me, where it was treeted as a simple rotating fan. I will eventually have to resort to my usual method which is make it, try it, if it does not work make it again. I have found that using this method the third attempt is usually somewhere near the mark. Thanks Bug.