How do you throw a tennis ball long range?

Answer 1

The most effective pass is the torpedo pass. Normally from the scrum half (as its their best weapon ) to the outside half from a scrum or set piece. The ball is held in both hands with the points of the ball in line with the direction to be thrown. The throw is made across the body of the ball carrier (left to right or right to left) with the most dominant hand being at the rear of the ball. As the ball leaves the hand in a torpedo action the player will spin the ball on this axis. This is reported to cut down on wind resistance and allow the ball to travel further

One of the best practitioner of this was Gareth Edwards former Wales Scrum half

Answer 2

Practice actually throwing a real tennis ball. To add to the muscle development wet the ball slightly and it becomes slightly heavier thus affording more resistance.