Left Arm Flying Wedge and Plane
 

Is the entire Left Arm Flying Wedge Parallel to the Plane (not On Plane, as noted by Martee!) during the Stroke between the Startup Swivel and Release Swivel?

Thanks!

I think Mike O's answer on this is 'no, except only for brief periods'.

the chicken and the egg
 

And if so is the Flat Left Wrist a product rather than a cause?

Without the Flat Left Wrist there is no Left Arm Flying Wedge, regardless of its relation to the Plane.

On Plane or Parallel to Plane?

The reason for the question, is that if the aft side of the shaft is on plane, then the left arm would be hard pressed to be on plane

You're being quite precise Martee!

Well, "left palm facing directly toward the Plane" would mean parallel to the Plane to me.

I have edited my question at the beginning of this thread to accomodate your insight :).

or its equivalent......

Absolutely! E.g. with a Turned Left Hand...

Ok...we are all picking on little things about my question (which is all very good), but no one has attempted to answer it!

I would say Yep if employing Standard Wrist Action. Since the the Plane is defined by the Sweet-Spot Plane with Standard Wrist Action the Sweet-Spot is In-Line with the Left Arm.

That's my reasoning anyhow . . .

Answer to your initial question - no, it is not, although as a mental image/feel this can be helpful in some cases (Hogan's pane of glass)

Lets dig deeper
 

What is a Swivel?
A Swivel is a rotation of the Left Wrist from a Turned position to a Vertical position (Release Swivel) or from a Vertical position to a Turned position (Startup Swivel).

For those enquiring minds who need references to confirm what I've just stated:

4-C-2: “When TURNED…the left palm faces directly toward that Plane."

4-D-0:
"Normally, only Swingers with their Standard Wrist Action (10-18-A) “Swivel” –- that is, actually rotate the Left Wrist –- through Release into its Vertical Position for Impact." [bold by tongzilla]

10-18-A:
Standard Wrist Action
"With this procedure with Wrist is Turned and Cocked (FCT) during the Backstroke which requires that it be Rolled and Uncocked during the Release. Only where this procedure is used, do the Hands “Swivel” into Hinge Action Position." [bold by tongzilla]


Hence my conclusion:
The Left Arm Flying Wedge must be facing directly toward the Plane from the end of the Startup Swivel until the beginning of Release, according to The Golfing Machine.

But a lot of people disagree with that (including me). So it's either wrong, or have I missed something?