For Longer Drives, Lengthen Your Swing
3 min1. Unweight your front foot to allow for the biggest, most unrestricted turn possible.
2. Elongate your lower body (stand up, almost) as you turn behind the ball. Trying to maintain posture can inhibit extension.
3. Let your arms bend freely to create further arc width.
4. Explode in the downswing with as much energy as possible, Balance and a pretty finish is not a concern.
And one final note - the most centered strike possible is the first priority to hit the ball a long way, so modify your swing gradually. A longer, faster swing won't give you more distance unless you're contacting the ball with the sweet-spot of your driver face.