heedm
Please forgive me for all the things I thought about you.
Looks like you're right.
The amount of rotor tip that will result from the creation of a moment on a teetering rotor disk was done. These calculations were done for aerodynamic 'precession' and for gyroscopic precession. The results are essentially the same. A moment of 50 pounds at 75% of rotor radius gave 0.47" and 0.44" of tipping at the 75% radius, 90 degrees later.
For those that doubt, are really bored, or want to find fault, the attached page is offered;
http://www.synchrolite.com/0940.html#Comparison
Lu; please note that the above is for a simple teetering rotor and its 90-degree phase angle. Any delta3 or flapping hinge offset will reduce the phase lag to below 90-degrees.
[ 11 August 2001: Message edited by: Dave Jackson ]