Well they are just concept illustrations in the form of graphs,
but of course... L=length -as in distance from the forward
waterline of the board (could draw a picture of the board on the
x axis) And I have another picture, just to show how the
waterline and high pressure area are moving constantly under the
board in response to trim and waves. My idea, which may be
silly, is that the rough or dimpled surface may affect the time
it takes for the high pressure area around the stagnation line
(i.e., just behind the forward waterline) to shift in response
to changes in water surface, board trim and flex (vice versa,
etc....), and how far from the mean stagnation line it shifts,
resulting in different accelerations imparted to the board and
possibly more stable trim and/or less energy lost to flexing the
board.. waterline and presssure .png [ 17.38 KIB | Viewed 854
times ] Normally we think of changing board's modulus, shape, or
other physical properties to make the board react mechanically
in a beneficial way. P