leland

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My lovely niece Heather

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My lovely niece Heather

Written by anderson

February 21, 2014 at 8:46 am

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Electric boat quote

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There are 2 typical conversion factors that are used around here. The first is 1hp electric = 2 to 3hp ICE (internal combustion engine). I prefer to use 2.5 for rough estimates. So a 12hp engine translates to about 5hp electric. 1hp = 750W, therefore 5hp = 3750W or 3.75kW. Alternatively, since boats are often overpowered or underpowered for various reasons, a more consistent conversion is 1kW per ton of displacement. The specs that I found on a Cascade 29 list it at 8500 pounds. That’s puts your power requirement right around 4kW.

So now you’re looking at a 4kW drive, probably with reduction, so far so good. Now, let’s look at batteries (storage).

A very general conversion to get you into the ballpark is 11.5kWh of usable charge = 1 gallon of diesel. Your 4kW drive will probably be 48V. A 12V battery rated for 240Ah contains 2880Wh of energy at a 20hr rate. Four of these batteries should equal 11.5kW (4 * 2880Wh or 48V * 240Ah). But this means running the batteries to 100% depth of discharge

Written by anderson

August 26, 2010 at 11:13 am

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Eagle Cliff

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Myron and me on eagle cliff.

Written by anderson

August 22, 2010 at 10:51 am

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Batteries for Electric Vehicles

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There is only one type of battery that is proven to work well in electric vehicles. This is the ev95 battery used in the Toyota Rav4 ev, the electric Ford Ranger pickup, and the electric chevy s10. The amazing Rav4 gets over 100 miles on a charge, goes freeway speeds, and many now have over 100,000 miles on their battery packs. The chemistry of this battery is no secret, it is NiMH. Nickel Metal Hydride works. I believe part of the stimulus should be used to mass produce this battery, subsidize it if necessary, and get it out to people making electric vehicles.

Written by anderson

March 19, 2009 at 11:49 pm

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Electric Vehicles

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Please let there be a usable electric vehicle soon. Toyota, please start making the RAV4 EV again!

Written by anderson

August 28, 2008 at 7:57 pm

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Someone tried to reset my password

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I forgot I had this account. Whoever you are who tried to reset my password, thank you. I will need to put some real *actual* content up here.

Written by anderson

August 23, 2007 at 10:59 pm

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Remember

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Sedulously eschew obfuscatory hyperverbosity and prolixity.

Written by anderson

November 21, 2005 at 11:30 pm

Posted in Uncategorized