Advantages of Wheels

FUNCTION SPORTS ATTACK WHEEL-PROPELLED MACHINES AIR-PROPELLED MACHINES
Machine
Performance		 Throwing head pivots easily delivering ball to any location on the court. Spin, speed and tempo can be adjusted instantly between throws. More difficult to place ball, must move the entire machine to introduce variation. Air propelled arm will not impart a spin on ball.
Release
Point		 Realistic – elevates from 5′ to well above men’s net, over 9′ 3″. Pivots up to only 6′ (well below both men’s and women’s net height).
Speed Sets to 80 MPH jump serves & everything in between. (Higher release point enables top speeds as ball trajectory does not have to arc to clear net height.) Sets, tosses and claims “hard” spikes and serves, but no actual speed is stated. (Lower release point requires ball to arc in order to clear net height.)
Durability Few moving parts, heavy duty welded powder-coated steel frame. Complicated air pressure system installed in metal frame encapsulated in a plastic shell.
Feeding and Tempo Coach can control tempo by feeding continuously or delays. No recovery time is ever needed. The speed, angle and spin are instantly controlled by the coach with each serve, set or spike. Air-propelled machine can be set to toss up to 1100 balls per hour (one ball every 3.28 seconds). However, recovery time is necessary after rapid fire of 8 –10 balls.
Ball Use and Wear New design includes specialized throwing wheels that are shaped to grip the ball with even pressure across a wide 4″ span to increase velocity and minimize ball wear. No specific ball required.
Digging With the Attack & Attack II the ball is released from above the net, a true downward trajectory at high speeds, providing unmatched spike simulation with realistic reaction time for the ultimate digging drills. Not capable of delivering a true spike over a regulation net. Spike drill must be performed from same side of net, below net height, severely limiting ball travel distance & player’s reaction time.
Serving Up to jump serve speeds and release point. Breaking top spins and floaters. No spin limits serve to a simple floater. Low release point requires an arc to clear net & slower speeds to keep in court.
Visibility Can see the ball from feed to delivery, providing a true sense of timing. True visual timing has to be based on ball movement. Player’s timing must be based on a small light seen from across the court and an unrealistic “buzzer.”

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