Swing speed 100 mph x 1.5 smash factor = 150 mph ball speed With your irons the smash factor is lower, typically ranging from 1.2 to 1.4, as irons are designed to impart more spin and precision ...

We now can estimate, based on your swing speed, about how high you should launch your golf ball, how much spin it should have, how high it should go and at what angle it should hit the ground.

“And if you hit a ball at that speed with a 7-degree downward angle of attack, you’re going to carry it 10 yards farther than if you catch it clean with a 2-degree upswing.” ...

Faster swing speed doesn't always mean farther drives. ... This creates a slight amount of spine tilt away from the target which helps produce a slightly upward blow on the golf ball.

To determine how layers of clothing affect swing speed and distance, two Golf Digest staffers—Drew Powell (+2.4 Handicap Index) and Sam Weinman (11.2 Handicap Index)—hit a series of shots ...

The expansive lineup of Callaway golf balls on the shelves today reflects this customization, with something for everyone, from beginners to elite players, slow-speed swingers to high swing speeds ...