Hydrodynamic Planing Hull is what Bob Simmons called his boards. This design, based on Lindsay Lord’s design experiments for the most efficient planing hull, is a mind blower. I first saw a modern short version shaped by Joe Bauguess at the first Sacred Craft show.
I then vibed on a photo of an incredible Simmons twin keel balsa with deep concaves and generous belly and shaped my first one. I took my oldest template (a 7’6″ egg) and sawed the tail off to 16″. The result was 6’7″ with nice hips toward the tail, perfect and a lot curvier that any replica would be. It has become one of my all time favorites and it seems everyone that tries it wants one.
This board has to be experienced to be believed. It really picks up waves a board it’s length has no right to. It is nearly impossible to pearl. Down the line it feels like a displacement hull but when you step back turns with the ferocity of a fish, without the wiggle.
Massive belly forward to DEEP single concave . Soft chiney rails to edge towards the tail.