Originally Posted by Always an 80
So you are saying that basically there is a countering topspin effect in force?
Spin is caused by the loft of the club, and how the face is tilted. Every club produces a gear effect. Meaning, the distance the impact of the ball from the center of gravity reduces the amount of spin, or helps tilt the axis one way or another. Drivers produce more because of the size of the clubface and the bulge of the clubface.
For example, if you take a driver, and you hit it on the toe. The gear effect will help promote more of a draw. It help tilts the axis for a draw effect. This is why toe shots have a better chance of starting right and drawing back. Heel shots are opposite. Thin shots produce more spin, but they launch lower because their is less loft below the center of the clubface. Shots that are hit high on the clubface launch higher but with less spin. It DOESN'T create a countering topspin, it just effects overall spin.
So what the SLDR did was move the center of gravity lower and forward. This basically made nearly the entire clubface into a gear effect to reduce backspin. I'll label it backspin because majority of spin on a driver is in that direction, though it can tilt left or right to produce a fade or draw.
So put it to you this way. I hit a 910 Titleist driver. When I hit it good, in the center with a solid strike, the backspin is near 2900-3100 rpm. When I hit my SLDR driver the same way, its nearly 2000-2100 rpm.