7-18 (Left Wrist Action)
Left Wrist Action is classified according to the changes in the Left Wrist condition prior to impact. The downstroke changes are opposite of the backstroke, but not necessarily occuring at the same points of the stroke. For instance, the left wrist may cock on the backswing and thus it will uncock on the downswing. But it may cock in the backswing when the right forearm in parallel to the ground, only to not uncock until right before impact.
Trigger Delay alters little geometrically, but magnifies the physics.So the geometry of the swing won't change much if you increase your trigger delay, but it will increase the physics, particularly Force (Force = Mass * Acceleration), trigger delay essentially magnifies the Acceleration.
Homer then talks about the 'Paddlewheel' action. This is the action the 'hitter' makes. Basically Homer is stating that the right arm moves like a paddlewheel on a steamboat moves. Here's what the paddlewheel looks like.
And from there Homer basically explains how the golfer who uses the paddlewheel action will increase power with more trigger delay. But remember, per the Endless Belt Effect (2-K), the hand speed stays the same, but the clubhead speed gradually increases. But with Trigger Delay, the greater the trigger delay the more rapid the paddlewheel action becomes.
7-19 (Lag Loading)
There are 3 different types of procedures the golfer can use to create lag in the downswing:
Drive Loading (Hitter)
Drag Loading (Swinger)
Float Loading (Hitter or Swinger)
Incorrect Clubhead Lag Pressure 'Feel' does not set up a steady driving pressure but a convulsive, impatient THROWING pressure, guaranteeing Clubhead Throwaway.There's a reason why I think there's a difference between 'throwaway' and 'flipping.' I think 'throwaway' is basically losing a bit of the primary lever assembly whereas flipping has a bent left wrist at impact. This is because Homer states that 'if the thrown Clubhead doesn't pass the Hands until after Impact Fix Position is reached, it still complies with the Law of the Flail, but precision Timing and Clubface alignment becomes difficult.'
I think 7-19 is extremely important to understand because not only can it teach the proper mechanics behind how to lag the club and the variations of how to lag the club, but it stresses that this loading is a STEADY DRIVING PRESSURE not a convulsive, impatient throw.
The swish drill is a good drill to understand the steady driving pressure and the steady acceleration of the clubhead thru the impact interval. Once the golfer can understand how to get maximum acceleration of the clubhead at impact and then understands how to hit down properly enough on the golf ball (with the irons), they'll reach the #1 alignment in the golf swing, the flat left wrist at impact. Here's a video of the 'swish drill.'