More good stuff...
First of all, I want to say that "ggspc" is answering these very well.
I just want my crack at it!
...if one swings left 2.24 degrees where is the clubhead path pointing at impact, and what is the relationship of the clubface to that path?
The clubface would be 2.24° open to the
plane line, and 0° square to the 2D path & the TRUE path.
Write these three sentences on a chalkboard 50 times...
1. When you hit down on the ball, your path will be to the right of the plane line.
2. When you hit the ball level at the bottom of your swing, your path will be the same as your plane line.
3. When you hit up on the ball, your path will be to the left of the plane line.
If one swings down at the ball with a plane line that is directed towards the target, that downward attack angle apparently creates an in-to-out clubhead swingpath of "x" degrees".
Ain't nothin' apparent about it, it just does.
Is it possible to have a clubface alignment relative to that path that will allow the ball to go straight towards the target without altering the plane line?
No.
Is there a 3-D graphical representation of the D-plane showing all possible combinations of path and clubface alignments, and their affect on ball flight?
No.
I bet some folks are out there working on it.
what are all the possible combinations of plane line, clubhead path and clubface alignment that will produce a straight ball flight?
Whoa.
Too many to mention, but a chart could be done.
Could you please be very specific? If the plane line is 2.67 degrees of the target, where exactly is the true path and where exactly is the clubface pointing?
The "TRUE PATH" would be a vector pointing INTO THE GROUND 2.67° that is parallel to the target line.
The "TRUE CLUBFACE" would pointing about 24° into the sky, parallel to the target line (which would mean about 11° of forward leaning shaft!)
How do you guys incorporate the D plane concept into your swings?
Have you changed your swing or just your static address alignment?
Is the straight plane line concept still useful?
Her's what I do—and teach.
Aim to X
Swing to X using whatever "Straight Plane Line" concept works for you (Like the yellow brick road).
Make sure the face is open enough to point close to the target.
Yeah baby!