Performance Tests and Analyses on a 7 Foot Hydrosphere Model.

The Hydrosphere concept has been evaluated in detail and attempts made to quantify performance parameters. Extensive experimental data have been gathered and analyzed in an effort to describe and predict Hydrosphere performance characteristics. This new propulsion concept exhibits very complex flow characteristics, especially when compared to the more conventional watercraft. The Hydrosphere concept produces a stable operating system. Excellent lift-drag ratios can be obtained even at significant slip however, when speed is of concern additional consideration must be given to the slip parameter. The Hydrosphere exhibits definite multi-mode characteristics. This means that the craft can be operated in a low slip and correspondingly higher velocity mode, that is quite different from that of a conventional planing watercraft. The Hydrosphere can be operated over a wide range of velocity and drag-lift ratios. The concept provides a number of interesting alternatives for proposing new types of multi terrain vehicles. It is not understood at this time what operating parameters are the most critical to operating the Hydrosphere in the highly efficient low slip mode. The rolling sphere was less susceptible to wind loading than was the locked sphere. Also the rolling sphere developed less total drag than the locked sphere.