What is the wind cross-section of 15-20kW of vertical wind turbines?
If you are not anchored or moored, won't you have a sailing craft after all? I mean, with all that windage aloft, won't you just be blown downwind?
If the reason why you won't be blown downwind is because you will be driving a screw which is pushing pushing water faster and harder than the wind can push the boat, I think you will have to add energy to the system somewhere.
I still don't understand why you wouldn't just anchor (or moor or dock). What is driving the anchorless requirement of the design? What problem is this a 'solution' to?
--- In electricboats@yahoogroups.com, "Galstaf" <richard@...> wrote:
>
> To clarify: I am indeed seeking an anchorless solution, and this is going to be a *non sailing craft* with 15-20kW of vertical wind turbines. More turbines may be added later.. they are not nearly as large or heavy as I had originally anticipated.
> The Azipod does pretty much what I am looking for; I just wasn't aware of the name. Ideally I would like that to be the principle drive for the boat also.
> Can anyone recommend a manufacturer for boats in the 50' (25000 pounds) range?
> Is anyone using anything like this?
>
> --- In electricboats@yahoogroups.com, danbollinger <no_reply@> wrote:
> >
> > It is possible, but I'm guessing you'd have to do most of the development work yourself. Good station-keeping, as in drilling rigs and research vessels, is done with a thruster on each quarter. Not a very good solution for a sailboat. Another way would be a single azi-pod mounted near the center of the boat. It would turn to face away from the direction of drift, and the thrust until it returns to station.
> >
> > I like the idea of anchor line strain gages, but the OP seemed to say he wanted an anchor-less solution.
> >
> > --- In electricboats@yahoogroups.com, "leemurs72" <jt.yahoo@> wrote:
> > >
> > > What you are looking for is called "station keeping" in autopilot speak. http://www.yachtingmagazine.com/article/Best-New-Autopilots has some tidbits on various autopilots. The ComNAV autopilots have station keeping abilities, but I think that requires a bow thruster...
> > >
> > > I am sure you could spoof a stay-put request by feeding a tight circle of waypoints to your autopilot over and over again. Of course, your anchorage neighbours would not be too pleased.
> > >
> > > How about adding a strain gauge to the anchor line feeding info to
> >
>
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