Hmm.
The answers are many and varied.
I have a (16’ Dory) 35 foot/pound trolling motor and after the first couple of times of my not Observing and following the tide tables.
Well you know.
Rowing and trolling against the tide is kinda stupid.
Drool is faster.
But with the tide (and the trolling motor) you can be a Tarzan with oars.
At slack tide my little motor moves the boat at hull speed and that adds about 4-5 hr of rowing energy.
So what I have concluded is there are far more enjoyable things to do than forget to check the conditions,
And ‘off season’ $75 is a good price to pay for a good, used, medium size non-water skiing motor.
GerryB
From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of Eric
Sent: Thursday, March 07, 2013 10:07 AM
To: electricboats@yahoogroups.com
Subject: [Electric Boats] Re: How Much Thrust is Enough
I agree with Steve. Trolling motors are made for, um, trolling. Even if the motors have enough power (probably not), the props aren't pitched for speed. You're probably good for 3 kts. For more, you'll need something that is more specifically designed for your purpose, like a Torqeedo or a regular ICE outboard. When you start pricing purpose built electric drives (including batteries), you'll start to appreciate how light, powerful, simple and inexpensive a gasoline outboard is.
In any case, at 2.5 tons of displacement, you should be looking at electric drive systems rated at about 2.5kW. A Torqeedo cruise 2.0, might be a little underpowered, but it should be fairly close. Beyond that, you would be looking at a Cruise 4.0 or an inboard systems, if you really want to go electric.
Fair winds,
Eric
1964
--- In electricboats@yahoogroups.com, "Steve" <sstuller@...> wrote:
>
>
>
> You have two choices. Drop the hook and wait for the tide to turn or turn the boat around and you will be going forward instead of backward. I'm just teasing you. With the flat pitch props on trolling motors you would be lucky to do four knots with no tide. The thrust figures are static thrust. At four knots you would be lucky to get half of that. Thanks. Steve S.
>
> --- In electricboats@yahoogroups.com, "dougmcq000" <dougmcq000@> wrote:
> >
> > Considering a pair of trolling motors with 164lbs total thrust - approximately 4HP. Wood sailboat is 5,000 lbs with 20' waterline. Going against a 4 knot current is this boat going to go backwards or forwards?
> >
> > I
> >
> > Thanks,
> > Doug
> >
>
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (6) |
No comments:
Post a Comment