Is this what you think the magic of the right forearm is.
Bending + fanning = right forearm takeaway
So, what are the correct muscles, bones and joints used to perform it?
The right shoulder joint and the muscles involved to move the upper arm have a key role in the magic of the right forearm.
The fanning motion you are talking about is from the rotator cuff muscles in the right shoulder rotating the upper arm
When you learn how the body moves you will understand.
I know that my mind is in my mittens....and on most occassion I have no trouble taking my forearm (with its side-kick...the golf club) up, back and in to my chosen top location. I am tracing a straight plane line the whole way in anticipation of destroying the same on the way down, out and forward. Perhpas knowing the muscular progeniture of this "magic" would have accelarated my progress. Except it came in the form of "fanning" sans-club, "fanning" with a kid's plastic club, "fanning" with a dowel, finally "fanning" with an implement ill suited for the task! I tend to use RFT and "fanning" interchangeable because I am such a big....FAN!
With all due respect I do not have to know a darn thing about the muscles to be able to have a three dimensional interaction with the ball! Geometry of the circle and the phsyics of rotation is about as deep as Okie wants to go! Forgive my narrow mindedness.
David Orr's explanation was sufficient...making special note that the hand originates it all.