Dwight did a series of perhaps three Hydrofoil Small Waterplane Area Ships (although none were ships). The idea is to get free lift from the submerged bodies. In fact the lift is not free. Especially with the large single torpedo, the lift so far beneath the center of gravity was extremely destabilizing. In those early days I was the test pilot, before Dwight discovered how much fun I was having, and I spent more time flying through the air and into the water than time flying. In fact almost no time was spent flying the single torpedo. Too unstable. The 4-poster, 4-torpedo model was fairly stable, but the added resistance of the four floats seemed to cancel any anticipated drag savings. The project was eventually abandoned for conventional hydrofoil configurations.
Photos & text by Ray Vellinga. Posted 6/8/2013