Is it be safe to say, that the direction of the clubhead after impact would peel away the illusion of Angle and Arc appraoches since Angle still goes straight and Arc curves inward?

Delivery Line Illusions
 

I'm not sure I understand what you mean, Mike, but I'll go ahead and answer anyway: "I don't think so." :)

Even post-Impact, the player sees "through" the Plane and thus the Angle and Arc of Approach Delivery Lines that are actually on the Plane appear on the ground.

I was thinking about the right arm driving crossline in a Hit stroke with an Angle Hinge toward right field vs a Horizontal Hinge Action of the Swing stroke that rolls the face shut.

Delivery Lines Primer
 

Both Hitter and Swinger see their respective Delivery Lines as being on the ground, not on the Plane.

There are three possible Delivery Lines to guide the Clubhead into Impact:

1. The true Geometric Plane Line. This is the straight-line Base Line of the Inclined Plane, and it may be used by both Hitter and Swinger. As the fundamental Plane Line Variation listed for both the Basic Stroke Patterns -- Drive Loading (Hitting / 12-1-0) and Drag Loading (Swinging / 12-2-0) -- it sits atop the Target Line. The player Traces this Line with the Clubhead, the #3 Pressure Point and the Right Forearm to Deliver the Clubhead into Impact.

2. The Arc of Approach. This is the curved line of the Clubhead Blur through Impact. It is a Visual Equivalent of the true Geometric Plane Line and is best restricted to Swinging. The player Covers this Line with the Clubhead and Traces it with the Right Forearm and #3 Pressure Point to Deliver the Clubhead into Impact.

3. The Angle of Approach. This is the straight line drawn through the Impact Point and Low Point. It is likewise a Visual Equivalent of the true Geometric Plane Line and is best restricted to Hitting. Because the Inclined Plane is inclined, this Delivery Line goes out to "right field." The player Covers this Line with the Clubhead and Traces it with the Right Forearm and #3 Pressure Point to Deliver the Clubhead into Impact. Hitters may use -- but are not required to use -- this Line to guide their Cross-Line Thrust through Impact. If it is used, it serves only as a Delivery Line (to Cover) and not as a substitute Closed Plane Line (to Trace). It is, in fact, the Angle of Approach to the Geometric Plane Line, not a true Plane Line in and of itself. If it were a true Plane Line, then it would have an Angle of Approach. And as all seasoned students of The Golfing Machine know...

There is no Angle of Approach to the Angle of Approach.

:)

Is this why dead straight shots look like pulls?

Clubhead Line-Of-Flight Versus Ball-Line-Of-Flight
 

Interesting question, glcoach. I've never thought about it that way. But, I can see both the illusion and the reality.

The Clubhead has an Inclined Plane Line-of-Flight and passes Inside-Out -- Down Plane -- through Impact Point to Low Point. The Ball, on the other hand, in a dead straight shot has a Vertical Plane Line-of-Flight. So, assuming a Ball positioned prior to Low Point -- Up Plane -- the Clubhead passes outside the Line of Flight of the Ball. Hence, the dead straight shot could appear to be a Pull as the Clubhead passes outside the Vertical Plane.

But...

Only to the untrained eye.

Hey buddy . . .I got something you can trace.
 

Stroke Dr. Spock,

Could one not also "trace" the extension of the Straight Line Delivery Path of the HANDS with the #3 PP from the Top to the Ball or Aiming Point?

As Mr. Kelley said in the 5th . . . Just like drawing a straight line . . . you don't LOOK AT THE CHALK . . . YOU LOOK AT THE POINT WHERE YOU WANT THE LINE TO FINISH . . . In this case I reckon the chalk is the thrust or the loaded pressure in your paws.

Yellow is beautiful.

Lines and Paths
 

I suppose you could look at it that way. However, the Delivery Path is best conceived as a Line of Thrust, not as a Line to Trace. And, as you have stated, that Thrust is always directly toward the Ball or, alternatively, the Aiming Point, even as the Hands move in a curve.

Keep these identities distinct: Delivery Lines refer to the Delivery of the Clubhead into Impact. Delivery Paths refer to the Delivery of the Hands into Impact.

Correctly executed, both produce identical Impact Alignments and Line of Compression through the Ball.

Although I wasn't referring to ball flight, I think I was trying to make fact of the path of the clubhead outside the vertical plane. But it is good chewing on your posts again. :)

Could you explain the differences between the two? I think I have a kind of vague intuition regarding those differences, but I think it would be helpful to hear it put into words.