Carter,
We do that now. We turn the generation on and off when sailing or under diesel power with the key switch on the quadrant. In the off position the prop spins without generation of power. In the on position the prop spins with generation of power.
What the clutch will give us is a way to charge by the diesel at much higher charge rate while at anchor on a mouring or in a slip. Today the prop must be turning, again by sailing or diesel, to generate power and is limited to the power of the sail (max todate is 100 watts sailing at 6 knots) or by diesel (max 1.2kw at 5 knots as the diesel power must first push the boat and it is a small diesel). The coupler will allow the generation of power by the diesel much more in line with the rated capacity of the electric 7.0kw. They system would then be a full capacity generator driving power into the propulsion battery bank.
You also asked about the price. The WE3.5 is $3995 and the WE7.0 is $4995. The installation is slightly more complex than the all electric as you deal with the installed ICE but is within the capabilities of a good boatwright or owner handy with tools. EY makes the traction system but is is not a gear box rather pullies from the motor to the common coupler and sized to the application.
Mike
Electric Yachts of Southern California
--- In electricboats@yahoogroups.com, Peter Rasmussen <danblu@...> wrote:
>
> Hi Mike ,Carter,
> Just a question regarding gearboxes. Could we not simply uncouple the motor electronically, say with a switch that turns off the generating?
>
>
>
> ________________________________
> From: Carter Quillen <twowheelinguy@...>
> To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
> Sent: Thursday, 23 August 2012 2:28 AM
> Subject: Re: [Electric Boats] Re: Pete's back shed hybrid
>
>
> Â
> Mike,
> Â
> That is a slick setup. Can you share the price of such an installation with us? Does EY make that gearbox?
> Â
> Are you planning on making your own clutches? I've searched high and low for something suitable with no luck. Thankfully I leave the boat in electric mode almost all the time anyway and only kept the 49 year old diesel for emergencies but it would be nice to be able to make the transition to ICE without having to take the chain off.
> Â
> I've seen some centripedal gocart clutches that looked like they might work well but can't find one with an 1 1/8" shaft bore. The biggest I've seen was 1" and that is rare, most are about 1/2" to 3/4". A centripedal clutch would also preclude having regen but my motor/controller doesn't have that feature anyway and I really don't want to run my ancient diesel any more than absolutely necessary. Although it runs like a top right now, I fear once it breaks, they'll be no getting parts. It was originally made by British Leyland for a double decker bus, then rebuilt and installed in the boat in 1980. When it does finally die,  I think I'll upgrade to series hybrid with a 20 kW electric and a 48V diesel genset. Hopefully I'll get several more years out of it before I have to do that though.
> Â
> I guess you don't have any problems running that Kanzaki transmission in neutral with the electric. The 32 year old Borg-Warner Velvet Drive I have does heat up a bit but no warmer than when the diesel is running. I've heard it can be an absolute disaster to do this with some transimissions. Does anyone know which ones don't like to be spun in neutral or is that just a rumor?
> Â
> Carter Quillen, PE
> http://www.archemedesproject.blogspot.com/
>
> From: Mike Gunning <mike@...>
> To: electricboats@yahoogroups.com
> Sent: Wednesday, August 22, 2012 8:43 AM
> Subject: [Electric Boats] Re: Pete's back shed hybrid
>
> Pete,
> Disclosure: Dealer for Electric Yacht
>
> Just finished our third trip with our diesel hybrid and I am really sold on the capabilities of the parallel diesel hybrid. I also have an all electric Newport 30MKll. My Columbia
> 9.6 is quite a bit lighter than your 32ft double ender. What we have found in sailing her is that when others sailboats around Southern California are under power on the upwind portion of a passage, we are sailing at about 60-70% of hull speed. Just a little slower but the journey is the destination. Just that little but of boost, 4 to 10 amps sailing assist makes it possible. Solar would be useful here. That fact has become the over ridding way I use electric on the boat. In Southern California light winds passage making my use has been: diesel propulsion/charging 25%, Electric sailing assist 50% and sailing only 25%. Electric only in day sailing and harbor use.
>
> We installed the WE7.0 on our 15 hp Yanmar and could have installed the smaller WE3.0 with much of the same results. The electric motor is mounted above the transmission with drive to the special geared common coupler. The diesel
> moves the boat, the electric moves the boat and the diesel while propelling the boat can drive the electric as a generator. The clutch would be very nice and it is in the future, shaft space already reserved for it. We use the same belt system we have installed in over 150 boats and it is quite and reliable. Chain would also work but likely more noise. The recharge system is turned on or off by the switch and the controller manages the amount of power the diesel driving the generator puts into the battery pack..
>
> You can see the installation here:
>
> http://groups.yahoo.com/group/electricboats/photos/album/1469361680/pic/list
>
> Your thinking about how you would use the hybrid is spot on. After making our third trip this Summer, I believe that for the 32 to 40 foot boat, the parallel hybrid is a good
> solution. The diesel systems are usually adequate and can handle the power load of the electric in generator mode (they are programed to not over demand power from the diesel while the diesel is pushing the boat). The benefit of the slow speed harbor under electric only is great. The sailing with electric motor assist is very useful to improve pointing and increase speed in light winds. And the size of the propulsion battery pack is likely to be smaller than in an electric only propulsion system without an installed diesel generator.
>
> Regards, Mike Gunning
> Electric Yacht of Southern California
>
>
> --- In electricboats@yahoogroups.com, "danblu@" <danblu@> wrote:
> >
> > Hi Folks,
> > I've got a 32 foot Atkins style double ender somewhat like a "Thistle". She's a great little bird on the
> water, sails really well except in really light air. Usually gets about half the wind speed to around ten knots wind but in really light conditions struggles a bit due to her having ten tons to propel.
> > So why not put a pulley on the propshaft( has an Isuzu 25 hp 2ab1 through a prm 140 gearbox) and fit an electric motor to both propel and generate power?
> > Just need the electric drive to push her to about 3 knots so 5 kilowatt should be plenty. I imagine electric assist in light air, and any time the sun is shining as plan to have solar panels attached to the lifelines. Should get our average speed up a bit!
> > I guess this would need a clutch or some method of disengaging when the batteries are fully charged or maybe a current diverter that heats water. Should not need a huge battery with this setup.
> > Really interest to hear your opinions.
> > Kind regards,
> >
> Pete.
> >
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
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