D Plane

[lex!]

Anyone seen those Utube vids with the two shafts joined by a bit of string and failed to understand it like me? Grey matter was really scrambled last night. I think Mark Crossfield offered the best explanation. But am I right in thinking that in to out path, with square club face is the optimum play?

 

[Foxholer]

Here's one of the better demos I've seen - from about 5 mins on http://www.youtube.com/watch?v=VGm7KyxTZAM

There's an assumption that you realise that the ball starts 80% closer to the Face Angle than the Swing Path

And at about 6:30 he actually shows, almost accidentally, the 'D-Plane'.

As first proposed in this book http://www.amazon.co.uk/The-Physics-Golf-Theodore-Jorgensen/dp/038798691X

As for optimum...it depends what you want to do! That i-to-o with straight will give a Push Draw which works well on some courses (notably Augusta). But Martin Kaymer got to World #1 with a different swing and fell apart when he tried to change to that!

Push Fade seems to be the fashion these days - giving plenty of control with more predictable miss.

 

[the_coach]

Anyone seen those Utube vids with the two shafts joined by a bit of string and failed to understand it like me? Grey matter was really scrambled last night. I think Mark Crossfield offered the best explanation. But am I right in thinking that in to out path, with square club face is the optimum play?

Depends on the difference in, the in to out path (in degrees) and 0 (being your ball/target line) the face angle and the AoA, dynamic loft, and also whether the face angle is square to the path or the target line.

For a good in depth explanation take a look at this.
http://www.youtube.com/watch?v=uepMzddHpas

 

[lex!]

Very helpful. Thanks guys.