OK chaps, (& C.E.D.), I'm completely baffled by this picture. What is a "Voith Unit" and how does it work please? Also, what's the advantage over more conventional propulsion systems? It certainly seems to add significantly to the vessels draught. Forgive my ignorance, I never really got beyond propellors!
Thanks in advance,
The voith unit makes for a highly manoeuvrable and safe tug, but yes they do have big bellys and they are a bit inefficient in the engine power to bollard pull ratio, but again, they do make great tugs to handle.
Have a look here for how they work, as it could and would take pages to explain and anyway I am not exactly 100% clear myself.
Errol, thanks for the information and the link. I've had a first read and down loaded the whole do***ent as more study is definately required! I am beginning to get an inkling and can see that it makes the vessel incredibly manouverable. I can also see why a fair bit of engine pwer is lost in the drive train, complicated beast. Are they reliable? In any event a very interesting concept.