Tom
you indicate an overnight at 15 miles down the 30 mile canal.
I would have to assume that you have shore power at the start, the
middle point and the end of the canal. Otherwise, you need to figure
for a 30 mile trip under electric.
Just a thought . . .
John Francis
Newport 28
Port Clinton, Ohio
On 9/23/10, runneribe42 <geoffgamsby@mac.com> wrote:
> Good morning tom,
>
> You are correct electric is the great for this application. There isn't
> much to break on an electric motor so I doubt you will have to Swap the
> motor out.
>
> If the motor is using 30 amp to travel 4 knots. it would take you just under
> 4 hours to get halfway up the canal which would be 120 amp-hours (15 nm / 4
> knot =3.75 hrs round to 4 hrs, 4hrs X 30 amps = 120 amp) This is the usable
> amp-hour you should have in your battery bank. 50% discharge (suggested
> lead acid discharge) you will want a 240 ah bank. 80% discharge (some AGM &
> lithium) ~150 ah
>
> There are several options out there, torqeedo, & parson are two major MFR.
>
> geoff gamsby
> www.straightturn.net
>
>
> --- In electricboats@yahoogroups.com, "incunabulaonline" <tomfindlay@...>
> wrote:
>>
>> Hello Electric Group,
>>
>> I'm building a Redwing 21 as a two berth charter boat exclusively for a
>> small 30 mile canal situated here in Edinburgh Scotland. Hirers would
>> charter for a two day, one way cruise including one overnight stop halfway
>> along.
>>
>> The batteries could be charged if required, at a marina halfway along the
>> 30 mile route.
>>
>> I dont want an inboard electric engine and would prefer outboard(s) for
>> practical reasons if a breakdown occured. (easy to swop engines)
>>
>> What are my options, remembering it's only for a 30 mile journey with an
>> overnight break halfway along. The speed limit on the canal is 4mph
>>
>> I think electric is an ideal solution in this instance, but what kind of
>> outboard(s) and what kind of batteries and all the gubbins that goes with
>> it, like an onboard charger that can simply be plugged in on the marina?
>>
>> Tom
>> Edinburgh
>>
>
>
>
>
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