Maciek
We tested various alternatives and ended up with one diesel charging the batteries, eg coupled to the generator, tailclutch disconnected, and the other E-motor driving the propeller, diesel disconnected. Propelling the sub by E-motors made it easier (softer) to handle the snorting condition for the hydroplanepeople ( steady snortingdepth). Several times during direct dieseldriven propellers we dipped the snortmast floatvalve resulting in very uncomfortable air pressurefluctuations and sometimes the safetyvalve on the exhaust opened filling the sub with black exhaust. Snortingpropulsion by E-motors was definitely the most favourable alternative.
Tore