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February 24, 2019

The image below is of a surfboard planning hull.  Most surfboards are flat from end to end.  A few have concaves and Vee's in the tail for speed and maneuverability.  At lower speed the underside of the nose rocker, known as the bow in boating, pushes water forward and...

February 23, 2019

The following video is a simulation of a ship hull pushing water out of its path as it moves forward.  The ship's bow parts water and pushes water aside in rough seas.  A ship's speed is restricted as its bow always pushes water.  Waves part and move around the ships h...

February 17, 2019

     Speed on water generates resistance.  Water resists compression. Water does not compress due to inter molecular hydrogen bonding. Bonding of hydrogen leaves little space between molecules. Without space, molecules cannot be compacted or squeezed together. Water mo...

February 2, 2019

There are many surfboard hull shapes; most can be classified into three categories.  Each category has conditions which optimize performance.

The first is the Planing Category.  Surfboards which are designed to ride on the water surface are planing boards.  These a...

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July 6, 2019

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