| Surfing the WWW for electric motors I stumbled on this page http://www.geminielectricmotor.com/ But I did not find any finished products. Is this yet another invention that will never make it to the marked? |
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Hey guys I'm in the middle of converting a 23' Regal. I have a photo album in the group listed under "23 foot cabin cruiser".
Getting up on plane is possible if you spend alot of money on 1000 amp motor controller ($3000) and some heavy duty dc oil filled capacitors.
Hull speed is easy to achieve with 300-400 amps @ 72vdc without any dc caps, but 400 amps just ain't going to get up on plane.
You are going to loose some HP on your sterndrive, direct drive is the way to go if you want to plane out.
Youtube does have a few e-boats getting up on plane, the fastest one out there can hit 98 mph with a 48vdc forklift motor and a 1000 amp zilla motor controller.
As for me, I just want to hit hull speed... 8-10 knots. My biggest attribute is my regeneration system. I'm looking to cruise hull speed continuously thru some unique charging system I've been working on.
I'll be keeping everyone up to date with my progress as it comes.
I'd like to see some pictures of your progress too.
Thanks
James
--- In electricboats@yahoogroups.com, "brent.jaybush" <brent.jaybush@...> wrote:
>
> John, Yes I'm VERY interested!
>
> --- In electricboats@yahoogroups.com, JohnnRaynes <johncraynes@> wrote:
> >
> > I have some data on a 26' electric boat conversion if you are interested.
> >
> > John Raynes
> > Exeter, NH
> >
> > Sent from my iPad
> >
> > On Dec 15, 2012, at 1:45 PM, "oldgoat1968@" <dcsteere@> wrote:
> >
> > > Actually, I'm more interested at this point in doing preliminary design planning. Does it make any sense at all? My 5.7L V-8 has max torque around 300 ft lbs at around 3,000 RPM. HP peaks at around 4,000 RPM at around 215 HP. It has a 99 gal fuel tank that would provide plenty of room for a battery bank. Based on my positive experience with an EV, I think I can get by with far less torque (and horsepower, too) from an electric motor, but I lack the skills to do a simple, back of the envelope calculation of how much power and torque I'll need. It would be nice to occasionally achieve a plane for short periods of time and to have a total endurance of maybe 3 or 4 hours, most of it at hull speed. Does this make any sense at all using a typical LIFEPO4 battery pack, and motor/controller similar to those the EV enthusiasts are using? The boat is pretty big (26 foot Sea Ray Sundancer) and it may just be totally in-feasible.
> > >
> > > --- In electricboats@yahoogroups.com, "Reid" <axius@> wrote:
> > > >
> > > > Dave,
> > > > There is a stock Mercruiser drive which mounts the gas engine midships and uses an automobile type drive shaft to the rear. This system is shown in most Mercruiser manuals. This may be easier than trying to support an electric motor off the 2 spring mounts on the transom plate, plus a support from the front motor mounts?
> > > >
> > > > --- In electricboats@yahoogroups.com, "oldgoat1968@" <dcsteere@> wrote:
> > > > >
> > > > > Brent, I'm very interested in this conversation. I, too, have a 1985 26' Sundancer with a 5.7L V-8 Mercruiser inboard-outboard. Mine is a B-2 outdrive, a conversion from the original B-1 model. I have completed an EV project on a 95 Acura Integra. I used a 3 phase AC motor (AC-50) which is conservatively rated at 59 HP and it has plenty of torque and power to push my car along quite nicely. Economy is excellent, too -- a measured 2.6 cents per mile over about a six month -period (a little over 3,000 miles). My thought is that a similar sized motor might be sufficient to drive my big boat. Not trying to win races here, but occasionally getting it up on plane would be a goal. Seems to me it would be relatively easy to configure a motor mount for a 9 inch motor and an adaptor plate/hub arrangement that would mate to the splined shaft coming out of the Mercruiser. Anybody every try such an arrangement?
> > > > > Dave
> > > > >
> > > > > --- In electricboats@yahoogroups.com, "mattelderca" <mattelderca@> wrote:
> > > > > >
> > > > > > There are some brilliant guys in the Netherlands that frequent this group.
> > > > > > http://www.newelectric.nl/
> > > > > > Although not as big a project as yours, their install would scale up a bit and fit well depending on your expectations. Not sure if you could run around at planning speed for any real length of time, but low cruising speeds should prove very doable. Be sure to watch their Youtube videos, as they say a picture is worth a thousand words.
> > > > > >
> > > > > > http://www.youtube.com/user/NewElectricPowerboat/videos
> > > > > >
> > > > > >
> > > > > >
> > > > > > --- In electricboats@yahoogroups.com, "brent.jaybush" <brent.jaybush@> wrote:
> > > > > > >
> > > > > > > Has anyone attempted or been successful converting a fairly large stern drive to electric drive?
> > > > > > >
> > > > > > > I have a 1979 26 ft. SeaRay powered by a Mercruiser/Chevy 260 HP 350 CU V8 gas hog with a 100 gallon tank for the black gold.
> > > > > > >
> > > > > > > Just beginning to research the possibilities. Certainly no shortage of space for batteries.
> > > > > > >
> > > > > > > Edison Marine has created a large 17' runabout with enough powering for hull speed, so it seems it should be feasible, perhaps with limitations.
> > > > > > >
> > > > > > > I already run it around MDR at a sea snail's pace using a surplus trolling motor on the swim step, so a proper EV design should do far better, but achieving plane speed is probably out of the question.
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > >
> >
>
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Good morning Bob,
I too saw the Harmony video, and impressed with their re-power project.
Unlike many here I'm trying to work out how to re-power my boat, as it was designed from the outset to be auxiliary electric powered (a Roberto Barros design POP 25).
My questions relate more to what brands/models of various components have proven reliable and durable.
While I slowly achieve each milestone of my boat building project I'm no better informed and no closer to committing to any particular e-power option.
It seems, the more I learn, the less I know, and I am all the more indecisive.
Like many here, I've seen the more professionally marketed electric motor systems and "packages" and cannot accept the preposterous prices they seem to think their motors are worth.
To be honest, it would not have occurred to me to use a commonly available industrial AC motor with a VFD.
In the new year, I intend to contact SEW Eurodrive who are highly regarded and globally represented. They design and manufacture gearboxes, motors, VFD/VSD's and all manner of other industrial control systems.
While my project was intended to be powered by batteries, I'm thinking that a smart hybrid power system such as the new Mastervolt battery/generator/charger/inverter combination products might be better suited to my application, than just batteries and some means to recharge them by sun or wind.
I hope SEW might offer suggestions. Should I learn anything of substance or value, I will share it.
Regards,
James.
--- In electricboats@yahoogroups.com, "rboyer56" <rboyer56@...> wrote:
>
> Thanks for the welcome.
> About my interests in eboats: I am interesting in building a catamaran and would like to make it electric. I saw the Harmony video on YouTube and like the manner in which they built their system "off the shelf". I have built three houses for myself and now would like to build my retirement home, a 47' catamaran.
> I would enjoy hearing from anyone who has similar plans and especially if they have already begun.
> Bob
> Moses Lake, WA
>
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How much? I'd be interested. How to contact?
Bradley
--- In electricboats@yahoogroups.com, "buck" <buckcrowley@...> wrote:
>
> I have a NG1 battery charger set up to charge at 48volts x 18 amps. Is there anyone in the group interested in buying it? It's never been used and in the original shipping.
>
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Hi junkrigsailor,
There was a junk rigged Norsea 27 for sale in Monterey CA for a while. I like those boats, is it the aft cabin model?
Regarding your hybrid plans, I think I would stay away from a chain drive. It might be noisy. Here is an off the shelf unit, http://www.electricyacht.com/products/our-weekender-hybrid-systems/
Mark
Santa Cruz
--- In electricboats@yahoogroups.com, "junkrigsailor" <junkrigsailor@...> wrote:
>
> Hi. I'm posting from home near Richmond, MO. I have a Nor'Sea 27 sailboat with a Chinese Junk rig and small diesel inboard. I am considering converting to a diesel / electric hybrid by adding an electric motor aft of the diesel, above the propeller shaft, and using a chain drive from the motor to the shaft. Why chain? Because split sprockets are readily available, and split sprockets and chain can be opened up to install around an existing shaft without a lot of teardown and reassembly.
> The plan, should it work out, would be to use sail as my primary source of motive power, electric as preferred secondary power, and the diesel for longer distance travel. I see using the electric by putting the diesel's transmission in neutral - some friction loss, but not a great deal. Possibly I would use the electric to boost the diesel, a wimpy Yanmar SVE8, about 7 1/2 hp and not a lot for an 8,000 lb boat, and under other circumstances let the electric be driven by the diesel as a charger.
> It seems likely that members here are aware of the Steyr Motors Parallel Hybrid system, as shown here: http://www.steyr-motors.com/marine-diesel-engines/2-4-and-6-cylinder/full-hybrid-propulsion-system-diesel-and-electric/ I've just borrowed their concept with the idea of retrofitting it to a (significantly lesser) existing diesel installation.
> This won't happen tomorrow or next week. I have quite a bit of work to do on the boat before I even consider the electric motor, but I thought I would do well to hang around here and learn for a while.
>
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