LynnBlakeGolf Forums - View Single Post - Compression? Thread: Compression? View Single Post #40 11-09-2010, 01:08 AM Daryl Senior Member Join Date: Feb 2005 Location: Illinois Posts: 3,521 Originally Posted by John Graham There are some major issues I have with this idea. With an iron, the ball hits the face below the cog and since momentum must be preserved, the clubhead is deflected lower at separation than it was at impact. It has to deflect downwards thus reducing loft. Check out this video. I'm guessing the first one is vertical hinging and you can see it deloft during the impact interval. JG You're observing the Clubface tilting under the Ball. That would be a Lob Shot. It's a special application of Vertical Hinging whose purpose is an almost total loss of compression. The following quote describes the requirements for Maximum Compression "On the Line of Compression" that only Hinge Action can provide. The Line of Compression may be far from the center of the ball, but maximum compression for that "Line" can be gained by following the Instructions below. Quote: 2-C-0 LINEAR FORCE The ball will respond to non-linear (angular) force exactly the same as to linear forces only if the application produce forces equally linear to the ball but not necessarily linear to anything external to the ball. Briefly stated, it is necessary to find a way to compress the ball through a particular point along a particular line, and maintain this compression through the same particular point along this same particular line straight line, through the entire arc of the Impact Interval, and with geometrical precision for consistent control. Study 2-K and 2-N. To maintain compression at a particular point that point, then, must rotate around the same center that the rotating force does. Not just the physical center of the ball nor the gravitational center – just the point of compression. In other words, the original contact points of the Clubface and ball must remain in contact throughout the entire Impact Interval. This is possible only if the motion – or arc – is uniform. Therefore there must be a perfectly centered action – or a compensating manipulation. Most people assume that the Ball "Rolls" up the face of the inclined striker. And, for most people it does and the result is Loss of Compression. Hinge Action Solves that problem by providing a means where-by the contact and separations point remains the same and there-by maximizing the amount of compression for any given Shot or, if you prefer, eliminating compression as with the "Lob Shot". __________________ Daryl Last edited by Daryl : 11-09-2010 at 01:22 AM. Daryl View Public Profile Send a private message to Daryl Find all posts by Daryl