The striking appearance of the remarkable GHOST high-speed attack craft revealed to the public last year by Juliet Marine Systems, Inc., (JMS) of Portsmouth, NH, applies supercavitation technology to offer new capabilities in high speed craft performance. The vessel has a centre hull and two movable sponsons allowing the main hull to run clear of the surface at higher speeds. At speed the wings carrying the sponsons move to a more vertical position raising the center hull clear of the water surface. There are large grilles on the side of the main hull, suggesting that behind them the gas turbine are located - probably two in number, possibly driving generators.
I’m guessing but probably within the torpedo shaped sponsons are electric motors powering pulling propellers, perhaps counter-rotating. As to the supercavitation technology, perhaps part of the “secret” of GHOST is that the gas turbine’s exhaust gases are ducted to the torpedo - time will tell! [More]