ORIGINAL: Lnewqban
ORIGINAL: UStik
Precession of the helical propwash...............?
From
http://en.wikipedia.org/wiki/Precession:
''Precession is a change in the orientation of the rotation axis of a rotating body. It can be defined as a change in direction of the rotation axis in which the second Euler angle (nutation) is constant. In physics, there are two types of precession: torque-free and torque-induced.''
Yes, see [link=http://www.rcuniverse.com/forum/fb.asp?m=10818131]post #17[/link] above.