[airair]

From my source:
"This is interesting. I was referring to the initial torque that starts the body's pivot that sets the whole swing in a circular motion. But as I corrected myself, Mr. Kelley refers to this as Pivot Thrust not Pivot torque. It remains a mystery to me why in a system based on the physics of rotation and torque is required to initiate circular motion why the word torque doesn't appear in TGM. Perhaps your friend would like to offer an explanation."