Supra SR Owner's Manual page 71

Ballast Trouble Shooting Guide
Swell Surf & Screen
The Swell Surf System utilizes high-speed rams to adjust 5/16-
inch stainless steel blades laser cut and bent to control water
turbulence off the rear of the boat's running surface. The
specially designed trailing edge of these blades, or flaps as these
types of elements are referred to in a fluid dynamics, create a
vortex-effect behind the boat resulting in specific wave shapes.
Different angels of deployment of the blades create custom
effects in the water turbulence to swell-up surf waves. Swell
blades benefit from a shot peen finish, a strengthening process
commonly utilized in aeronautical construction, to increase the
fatigue life of the piece. The Swell System is mounted and held
together by a series of stainless steel through-bolts and stainless
brackets for an extremely stable platform for wave making
70 — — 70
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