When we toured the hybrid I did not recall if it used the Voith-Schneider system or a conventional drive. As you can imagine, the Voith-Schneider System is very expensive but absolutely remarkable in running the boats. We were also on a traditional tug and they gave us a demo of 3/4 speed forward and 3/4 speed sideways and it was the same.
This is an article about the hybrid. The idea is that the tug goes to station and stays on station with the electric and only uses the massive push diesels when guiding a vessel. They do not necessary push these very large ships as the ship can spin their own prop, but the tug can guide them into very tight spots.
http://www.professionalmariner.com/September-2012/Fosss-second-hybrid-tugboat-employs-new-more-powerful-lithium-polymer-batteries/
The harbor pilot takes over from the captain of the vessel and gives all orders from the bridge of the vessel. The tug just becomes part of the propulsion system of the vessel. Very cool.
Mike Electric Yachts of Southern California
--- In electricboats@yahoogroups.com, "cire" <cirejay@...> wrote:
>
> It seems unusal for a tugs be a hybrid given that many are diesel/electric anyway.
>
> I worked with a tug company a number of years ago and the units are basically the same as the diesel/electric locomotives.
>
> eric SV Meander
>
> --- In electricboats@yahoogroups.com, "Mike Gunning" <mike@> wrote:
> >
> > The Voith-Schneider system is used extensively on tugs. Very robust and the tug has the capacity to go sideways with as much power as forward. The gear box in the engine room is is size of a modest dinner table. Remarkably quiet for what is inside the gear box inside the engine room but you must wear full hearing protection.
> > Foss Marine have a number of tugs with this system in LA Harbor and they also have two Hybrids that use electric motors to move about the harbor to pick up their tow and then switch to the high capacity diesel to push/pull their tow.
> > Mike Gunning Electric Yachts of Southern California
> >
> > --- In electricboats@yahoogroups.com, "Eric" <ewdysar@> wrote:
> > >
> > > Have you actually seen one, or is this another random internet discovery?
> > >
> > > It doesn't look particularly applicable to private electric boats with the small version built for more than 200Hp.
> > >
> > > To dream is good, to do is better.
> > > Eric
> > >
> > > --- In electricboats@yahoogroups.com, Kirk McLoren <kirkmcloren@> wrote:
> > > >
> > > > http://en.wikipedia.org/wiki/Voith-Schneider
> > > >
> > > > �
> > > > never saw one of these before, the�Voith Schneider Propeller
> > > > �.
> > > >
> > > >
> > > > Worry is a misuse of the imagination
> > > >
> > >
> >
>
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