Originally Posted by roy2xeagle
you need to read ALL the article.....the clubface is basically laying on the arc facing the sky....it is still "square to the arc"(180 or very close)....and my forearms do not rotate......put your left hand on the golf club and show 4 knuckles and you will see that your forearm doesnt have to rotate.....No forearm rotation.....when i see my club facing the sky its def perfectly square to the arc of the swing plane,,,if you say its 90 degrees then so be it(90 degrees to me is parallel to the arc)..if you rotate the club up then its perfectly parallel to the swing -plane or perpendicular to the arc...i call what you call 90 degrees laying perfectly across the plane and staying there until impact...does that help at all...if you see my swing you will just say its like my "teacher/guru".....the clubface simply "turns over" as the back swing progresses to facing the sky and to me the clubface itself is laying at 180 degrees......if you read the article you will see that...some students have some rotation while others dont........this if "you dont rotate then the club is over your head" is ridiculous!!
The swing plane can range from the hands to the elbows, maybe higher. For the clubhead to stay square the swing plane it must keep its original angles to the swing plant at address. Meaning, there are an x,y,z coordinates. I am assuming that swing plan itself is at zero. From the ball to the target is x, from the ground to your head is y, and from you to the ball is z. The swing plane is on the x-y coordinate plane, angled on the y-z plane. The clubface, squared to the target line, is an z-y plane, thats angled on the x-y plane. Since the plane is circular in shape (general terms). that is the angle of the oringal square set up with the clubface must stay tangant to the swing path at all times.
Now if you look at the top of the swing, the clubface is now pointing 90 degrees away from its original orientation, because it is not tangant to the swing path anymore. To be tangant to the swing path, the clubface must be be oriented at the top such that the will be pointing, were the x axis value would be positive meaingin the direction of the target. The y-axis will be positive meaning pointing towards the sky. and the z axis will be negative, meaning pointing towards you, or past you behind you. The clubhead would be angled in such a way that the heal would be pointing at the ground behind you, and the angle formed from the heel to the toe would be such that its the angle of the swing path -90 degrees.
Like above, they show the clubface pointing parallel to the swing path (not square). Which shows the vectors as (negative x, positive y, postive z), and the clubhead angle is such that is the angle of the swing path +180 degrees, or 90 degrees rotated from the original starting position.