----- Original Message -----From: nzsilviaSent: Wednesday, May 26, 2010 6:50 PMSubject: [Electric Boats] Re: advice for catamaran projecthi eric
diesel is considerably cheaper in nz due to the road tax being paid seperately while it is included in the price of petrol. you are right though it would take me a very long time to recover the difference if ever.. (unless i mannaged to work out a very cost effective way of doing diesel electric) i've just always hated going along burning 4 lires an hour knowing i could be burning 3.. one of the reasons why i have sold my planing boat and i am now going to a displacement boat with sails! the new technology certainly does interest me too and the possibility of regen etc if i were to have a battery bank in the future is appealing.. i have not ruled outboards out completely yet though if d/e is going to be unobtainably exensive for me i will follow that route. thank you for your advice it is good to know about all options.. would 20 horses really only burn 2l/hr? i had heard similar figures for 9.9's
thanks.
adam.
--- In electricboats@yahoogroups. , "Eric" <ewdysar@...> wrote:com
>
> Adam,
>
> Please check your premise when evaluating the financial impact of the decision. Let's assume that petrol and diesel both cost about the same, $1.40 AUD/liter. I'm in California, so you can adjust the fuel prices to your local sources. Also, diesel electric will not be twice as efficient as petrol outboards.
>
> Dual petrol outboards should burn less than 4 liters/hour at electric equivalent speeds (5kts) or $1.12/nm.
>
> If the dual diesel electric drives burn 3 liters/hour at the same speed, then they cost $0.84/nm or a savings of $0.28/nm.
>
> If you circumnavigated the globe (25,000nm) entirely under power at 5kts, your total fuel savings would be only $7,000.00. A more realistic figure of 1000nm/year will save you $280.00 annually.
>
> Of course, you can pick alternative drives because you're interested in new technology or just because you want to, but try to be realistic when formulating financial justifications.
>
> Fair winds,
> Eric
> Marina del Rey, CA
>
> --- In electricboats@yahoogroups. , "nzsilvia" <nzsilvia@> wrote:com
> >
> > hi again everyone, thanks for all the advice!
> >
> > the main reason i am put off petrol outboards is the lower fuel ecnomy.. i will be living on the boat for probably at least a year before i get sails and moving around alot. plus i plan to live onboard longterm exploring overseas eventually so the fuel saved should overcome the likely larger initial investment....
> >
> > thanks.
> > adam.
> >
>
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