Our R&D with underwater technologies led to the development of a closed-circuit engine system we believed capable of powering a submarine.  Next, we developed and built a steel pressure hull for a High Performance Submersible we called the HYPERSUB.  The intent was a minisub capable of high speed and long endurance, for whatever practical purposes that might have.



First we had a basic design for the submarine on paper, and a mock-up in development, when we built a test model to experiment with in our pool.  This inexpensive replica allowed us to examine  weight-and-balance, form drag, and hydrodynamic efficiency. 




After we were satisfied with the design, we needed a steel pressure hull for the HYPERSUB.  Above is an in-process shot of that hull under development.  The foundation is a machine-formed, arc welded, steel hull of hydrodynamically efficient teardrop spindle shape, adapted with a cabin structure and control surfaces made up of cardboard templates.





Pat seated inside the HYPERSUB cabin mockup, checking the view through the front ports.





After we were satisfied with the size and shape of the cabin mockup, we used the cardboard templates as patterns from which these steel parts were made.





Pat forming the steel cabin flange to fit the pressure hull.





Pat showing off.  “We’re not only willing to stand behind our work, but on it as well!”





Grinding the hatch aperture.