Thursday, April 26, 2018

Re: [Electric Boats] Quite the potential project.. but is it feasible?

 

Might I also suggest finding an old electric fork lift or two and raping the guts out of them. Might be easier to find than a Tesla. 15-20 kW total should get you 3-5 mph in CALM water and be enough power to maintain control up to a medium chop in a stiff wind. Some of those big electric fork lifts and industrial floor cleaners get up to about 10 hp I think and operate at 48VDC. 

I've essentially got a 7.5kW golf cart motor on steroids pushing a 50', 20 ton barge and I can make 5 knots in calm seas and head into a 35 mph wind with 2-4 ft seas at 1-2 mph to give you a benchmark. Believe me, it doesn't take a lot of energy to go SLOW . In a lake with calm water. I once pushed the Arc out of a lock and then another mile to a cove when my prop fell off using nothing more than my dinghy on the hip with a 50# thrust Minkota and a half charged marine battery. Into a VERY light head wind even.   

Capt. Carter
www.shipofimagination.com

On Thursday, April 26, 2018, 11:18:10 AM EDT, Hannu Venermo gcode.fi@gmail.com [electricboats] <electricboats@yahoogroups.com> wrote:




Not hard at all.
Buy a salvage tesla for the batteries, and the motor and controller as well if you have good electronics/it skills.
The famous online hackers who have done this would likely help / guide you.


On 23/03/2018 16:13, Rob rob@sail4life.net [electricboats] wrote:
 

I've learned a lot by lurking, but I'm contemplating a project that is MUCH larger than anything I've seen addressed here, so I thought I'd ask for advice…

Thanks in advance !

Project: 100' and 100 +/- ton canal barge repowering

Current power (broken) diesel engine from 1957, originally rated 116 hp

I'd like to yank that beast and repower with an electric drive.

Velocity requirements are: normally 3-5 knots. Panic mode 10-12 knots.

Assume the end product looks like a battery bank, 1-2kw solar, an autostart genset (possibly a larger and smaller unit?). Autostart based on demand and/or battery voltage… but that's a pretty broad assumption and I'm certainly open to options...

Generally, plan to move <20 miles per day, or maybe as far as the sun will take us. Also, typically don't have to deal with any current (but occasionally, thus panic mode above)

I thought I'd ask about feasibility before I even looked at the costing ;-)

Thoughts and/or suggestions?

Thanks!
-Rob


--   -hanermo (cnc designs)


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