Archive for the ‘D Plane’ category

Explanation on Launch Conditions with Driver

May 1st, 2013

I know some of you like this stuff so I thought I would share this with you.


Feel free to pass it on as well.

The Complete D Plane 3D Video

April 19th, 2012

Complete D PlaneJust wanted to share with everyone that has downloaded the D Plane Chart and subscribed to my blog posts that I will be releasing a video for sale that discusses the D Plane. This video which is about an hour long explains in detail all the elements of how the D Plane is constructed. The great thing about the video is that it has been constructed in a 3d platform. We are hoping that this will help coaches and players better understand this very important topic.

I’ve included a teaser video along with this post to give you an idea of what it will look like.


I’ve also included an opportunity to preorder the video before it is released in a few days. The video is up on the server and we are making some small setting adjustments before sending out it’s location and password. The video will be $10 and you can preorder below by paying through the paypal button included. Once the settings are finalized, I will email you the links and download information.


Trackman and Initial Ball Flight Direction

February 19th, 2011

Trackman Horizontal Launch Data

Here’s a picture from a Trackman presentation I thought would make for a very interesting discussion. You can click on the image to see its full size.  Basically, this chart shows the  results from a case study comparing different golfers and Horizontal Launch Angle. It discusses the Face Angles and Club Paths contribution to Horizontal Launch Angle.

Here’s how to read the chart. The bottom numbers represent ball speed (in MPH) and the numbers on the side represent the percentage of contribution in the Horizontal Launch. The blue line would represent 100% contribution from Club Path to Horizontal Launch and the red line would represent 100% contribution from Club Face Angle.

There’s been a general consensus that the ball starts at about 85% of Face Angle.  You can see that this is not necessarily accurate.  Their are many factors that go into the full answer.  Each dot in this chart is a hit. There were a multitude of golfers used and you can see they were from a wide range of skill levels and swing speeds.  I’m am not aware if the slower swing speeds are different clubs or just the same club with a slower speed.  The other thing we don’t know is where on the face these shots were hit and the divergence of the face on path on these shots.

In any event, I think this will give you some food for thought.  Aside from swing speed and loft, friction is the other main component for Horizontal Launch Angle.  This friction is one of the main reasons why lofted clubs will tend to be a little closer to 65% of the face angle direction relative to the 85% we hear about driver face angle direction.  Just remember, the face angles contribution can vary and only with measurements from an accurate machine can we truly understand what happened at impact.

Please consider sharing this information with as many people as you can by using the Twitter and Facebook buttons at the bottom of this post. The more teachers and players that understand the reality of ball flight, the better off everyone will be.

John Graham Interview on Gotham Golf Blog

December 27th, 2010

John Graham Interview

John Graham’s Interview with Ralph Perez of the Gotham Golf Blog. Click on the Picture above to go to the video. This is basically an introduction to me, my history and my internet presence.

Hope you enjoy. Pass it on.

D Plane – The Short Version

October 21st, 2010

D Plane - The Short VersionI made this little drawing to help someone get an idea of what is most important about the D Plane.  This picture is basically showing a picture of a swing plane from down the line for a right hander.  As I look down the plane, there is only one place on that line that is more right than any other.

This point would be low point.  If the ball comes off the face any other place on that line, then that means that the club head is moving to the right until it reaches low point.  So, if this swing planes low point is pointing toward the target, any ball hit before that assuming a centered hit and a square to target club face shape can not fly straight.

In other words, if you are looking at your swing on video and your club travels right on this line while it’s pointing directly at the target and your club face is pointing directly at the target but you hit the ball before the low point, you will not hit it straight. Please check out the other D Plane posts on the D Plane page above.