Originally Posted by Unregistered
...a planing surface (ie a board) will not create any lift at zero angle of attack because at zero AoA there iis no momentum exchange.Board /hull or any planing surface needs to be at a slight angle to direction of travel...
As I've written in previous post
, "...in these context, in air or in water, an HIGHER Aspect Ratio has pratical effect of increasing LIFT (above all when angle of attack increases)...
And when a windsurfing board runs on water it always (and inevitably) assumes a certain Angle of Attack for board design (scoop line).