[hcw]

Trigolt - sounds to me like you do understand it!

Think of it this way -

In your example, that 10mph 2x4 is like an 'average' golfer. There is speed, but generally not much mass. Not much 'support' behind impact.

That 10mph car is a tour player - same speed, more mass. Lots of 'support' behind impact.

So the question is, how do you get MASS in your swing.

And the answer, to put it simply - is maximum lag PRESSURE

Which in a 'feel' sense is a HEAVY club. Feeling PP#3.

Brian's 'shopping cart' image.

How many times have you watched a tour player take an easy swing, yet the ball rockets off the face? The reason, they have the proper sequence that maintains lag pressure and thus delivers MASS to impact.

Extensor action is a great shortcut. As are 'slow motion' drills - hitting your 160 club only 100 yards with a full, smooth, flowing motion.

Sustain the line of compression

this is really just for anybody else out there for whom the idea of "transfer of mass doesn't work (i just can't buy into the idea more mass getting to any given clubhead)...i think getting "more effective mass" by "maintaining max lag pressure" is the way to have max clubhead acceleration at impact...and since i think how far the ball goes is governed by F=ma, then acceleration works just as well as mass...that and hitting the right part of ball with the sweetspot (which also ups your "effective mass" by getting the center of mass and thus "all" the mass of the clubhead on the ball, thus more force) in the right direction (ie sustain the line of compression) is in my mind what allows a pro with a smaller mass than i have to hit balls a lot further...again, just an alternative way of thinking about it, use whatever works...

-hcw