The Golden Mean Machine

The Golden Mean Machine

The Mini Simmons

Designed in collaboration with veteran Hydrodynamica test pilot Daniel Thomson.

The Mean Machine is the end result of 8 years of research and design. Aspect ratio of the planing surface in accordance with concepts explored by Lindsay Lord, Bob Simmons, and Fibonacci.

Stringerless XTR foam with epoxy resin. Available as dual, tri, or quad fin. 19-20” wide for the tri fin, 19”-22” wide for dual fin and quad. Suggested lengths 5’3” to 6’2”. Available with glass on bamboo fins, carbon fiber fins, or fin system.

A super high performance design utilizing Simmons’ original planing hull theories. Shaped by Daniel Thomson exclusively for Hydrodynamica.

Order Board
The Golden Mean Machine
The Mini-Simmons

Planing Hull

The Mini-Simmons

An excellent starting point for the planing hull experience. It is the widest, flattest, and fastest of all the designs in the line.

The Simster

Planing Hull Tri Fin

The Simster

The Simster was inspired by Simmons’ attempt to build Bev Morgan a short, tri-finned planing hull nearly sixty years ago.

The Ekstrom

Planing Hull Asymmetric

The Ekstrom

Carl Ekstrom innovated the asymmetric surfboard in the mid Sixties. Asymmetry helps loosen the heel side rail of a planing.

The Cybersim

Planing Hull

The Cybersim

The CyberSim is a scaled down version of the original hydrodynamic planing hull designed by Bob Simmons in the 1940s.