[O.B.Left]

Is the right arm thrust along the plane or from inside across? I know it is down and out (and across?). But, does the elbow sit on the swing plane and the thrust is then along the plane or does the elbow sit inside the plane pushing down and across with the left arm and shaft on plane?

From you address position , what would your right arm motion be like if you threw a stone or another golf ball at your golf ball. It'd like a side armed stone skipping motion sort of, right? And so it is in golf as well for longer shots, Major Basic Strokes. "The Right Arm Throw" is a Throw.

Although for a short shot,putting ,chipping maybe there is the Push Basic , Minor Basic Stroke that is more of an in line arm extension deal that can as an option be aligned so it pushes straight towards the target or parallel left or whatever. To attempt to do this for a full shot is a common misconception for a new Hitter I think. It was for me anyways.

I love Daryl's references especially 1-L-15 .......basically you are thrusting until your right arm is straight. Thrusting down and out towards the Plane Line all the way to Both Arms Straight , Follow Through. Way past impact , or low point. Despite the fact the clubhead is moving Up and In. There is more down and out to be had than most people realize is possible, way more.