SDC ( Single to Double Concave)
SINGLE TO DOUBLE CONCAVE. The Single to Double Concave features Pride’s most advanced bottom contour to date. The bottom contours of your bodyboard and how they are blended together, play a big role in how that board is going to perform. Concave’s produce lift as well as laminar flow of the water under your board. They also slightly increase the overall surface area compared to a flat section. Some very basic fluid mechanics principles have been adapted to our case by our Pride Lab engineers. “When the water flow goes from a bigger section to a smaller section, the flow speed decreases and the pressure increases.” figure 1. explains Jeremy Arnoux. “Using this principle as an analogy to what happens below our boards (if water is coming from both side of the board), if the perimeter of the concave narrows, water will encounter resistance at the end of the concave creating a pressure which push up the board creating more lift. As a result, having a concave will add a greater sense of lift. Which also means more speed in smaller conditions."
The Double Concave is coupled with the classic deep Hull channels. Channels operates the opposite. While most of the surfboards on the market have fins in order to add drive and maneuverability, Channels are replacing the fins: The diameter at the end is bigger than at the beginning creating drags which is partly the reason why the tail of your bodyboard is maintained into the face of the wave.