It was planned as an experiment. But soon the potential of this optimised hull shape became visible.
This first diving prototype has the fin configuration of a fish (+ horizontal stabiliser) and shows extreem manoeverability in all directions.
The shape was designed for the high speed experimental submarine
ALBACORE. For this hull it was streched to meet a 1:4 width/length
ratio. The big submarines are thinner due to manufacturing and
handling problems. Both constains we do not have for a model.
The speed from a given motor is impressive and the manoeverability at its maximum.
The pictures show the raw setup of the prototype. It is equiped with a bajonet shutter ring, a motor unit 700 (thats a 30W /4000rpm motor with watertight shaft assembly) and a 12V 7.2Amphrs lead battery.
With active roll controll via the pectoral fins the Ballfish can even carry a sharklike fin nearly as big as itself.
A Variant with contrarotating props and X-rudders.
The red boyancy hulls of the "Autonomous Benthic Explorer" from WHOI have the same shape. The model would be scale1:4.
Prices: Fibreglas hull (diving depth >10m) in two parts € 125,- fish fins made from PU resin € 2,50 per part bajonet lock ring 130mm € 90,- motor unit 700 € 85,- ballastsystem (rubber bag/peristaltic pump) € 127,50