Going from diesel to hybrid engines on a MOCRA racing trimaran

TRIMARAN WINGOVER's picture

WINGOVER, is a 40"x 31" modified 1993 CROWTHER TWIGGY trimaran
She is having a full refit this year
I hope to be abble to take out the Yanmar 1gm10 6Cv diesel engine and replace by two electric pods to have a much better mobility and less noise and vibrations.

Project can be cut in 3

- Batteries
For the moment Lipo 48v/80 Amp/h is the choice, Pb is much too heavy for such a light racing vessel.
Could be this :
http://www.erun.ch/pr032.htm

- Engines
Two 48V/60 amp brushless CC pod that will be foldabble
Could be this :
http://www.kraeutler.at/motor_details_en.html?id=52

- Electronic
Charging, engine control, and reverse use to recharge batteries when sailing
This part of project is for the moment the big pain in my ...
So here, help greatly needed !

Good wind !

before comments

Comments

Buy this book (sailboat electrics simplified), buy "used" if you want to save a couple bucks:

http://www.ebooknetworking.com/books_detail-0070366497.html

Whether you are outfitting an RV, remote cabin, or a boat, I read this book from my local library and I can personally recommend it.

There are other "off-grid" books, but this one has the best diagrams, images, and explanations.

Most boats have a wind-turbine and some solar PV panels (along with the engine-alternator charging). If you only use the electric maneuvering motors less than 5% of your water time, and have low-draw LED lights, the system doesn't have to be large to work well.

After reading this book, you may be able to get answers to specific question over at the "otherpower.com" forums.

The best prices on Lithium batteries seem to be from a well-regarded supplier from China named Ping, you can read about his packs by searching either HERE, or over at the other electric bicycle forum "endless-sphere".

I would not travel on the water without a back-up diesel-gen (for those rare no-wind/no-sun days), plus an independant battery for the radio. You can find small dependable ones from Kubota, Honda, or Yanmar. -MM3(SS) Roberts, USS Guitarro (SSN-665) 1977-81

"The two happiest days in a sailors life is the day he buys his own boat, and the day he sells it"

TRIMARAN WINGOVER's picture

Thanks for comments !

Electricity is not such a mystery for me as i am an engineer in this aera, but finding the right electronic to drive engines and batteries is new to me.

Wind turbine is of course planned, and may be 2, an air-x giving 400 watts 5 to 25 Knts, an aerogen 6, going 10 to 45Knts
Solar panels with MPPT regulator, but i have to study how it can work with Li-po batteries
Mosfet battery splitters if needed

i also wich to use the 2 engines as generators when traveling at reasonnable speed (under 12 Knts), i should not loose more than 1 Knts, may be less

Of course, i agree, an independant sealed battery + solar panel for VHF and irridium in case of problem is a very good thing

Generator will be a light unleaded gasoline one, to have only on type of fuel aboard (same gas than the outboard 3cv engine) and also for weight considerations 35 Kg versus 90Kg for diesel. Now i do not know if it will be a 48v or 110v or 220 !!!

Where should i look for electronic to drive motors and re-charge batteries, 48v / 60 amp !!! seems to me a lot !

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