Smash Factor relates to the amount of energy transferred from the club head to the golf ball.
The higher the smash factor the better the energy transfer.
A golfer would hope to achieve a smash factor near 1.50 on driver shots.
That means for a 100 mph club speed the ball speed would be 150 mph. The higher the loft of the club, the lower the smash factor is expected to be. A PW should have a smash factor near 1.25.
Spin rate has a major influence on the height and distance of a shot. Spin rate is one of the least appreciated numbers, especially in windy conditions.
A high spin rate is the enemy, particularly when hitting in to the wind. One way to reduce spin is to hit a lower lofted club. Practice taking one or two clubs more (5 iron instead of 7 iron) and swing easier.
This will help you control your ball flight and distance. More loft generally increases spin rate. All things being equal, more club speed will also increase spin rate.
Launch angle is highly correlated to dynamic loft. Launch angle will always be a little less than dynamic loft, but will have a similar value.
Along with ball speed, launch angle is a primary component to determining the height and distance of a shot. Every golfer should be fitted to achieve the optimal balance of launch angle and spin rate based on their club speed and ball speed.
An important thing to know about carry is that the value is given for a landing area that is the same height as where the ball is hit from. Then the golfer can adjust for uphill and downhill shots on the course.
This reason is why carry is sometimes referred to as “carry flat”. Using the club speed definition, we would expect the average male amateur to hit their driver as far as the average LPGA Tour player.
However, the actual difference is more than 20 yards. Ball speed, launch angle, and spin rate must be optimized to reach a golfer’s potential distance. LPGA Tour players are some of the best in the world at optimizing these numbers and getting the most out of their club speed.