T-Pain Is On A Boat: Re: [Electric Boats] Trolling motors ==> electric outboards

Friday, May 31, 2013

Re: [Electric Boats] Trolling motors ==> electric outboards

I remember taking a ride in a Cessna 180. That variable pitch prop made a huge difference.

Prop failure in a boat isn't as catastrophic as an airplane so why don't we see them?

From: Dennis Wolfe <wolfeboats@gmail.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Friday, May 31, 2013 5:19 PM
Subject: Re: [Electric Boats] Trolling motors ==> electric outboards

A trolling motor that produces, say 50# thrust at zero boat speed would produce zero thrust at 6 or 8 mph. Double the prop pitch and thrust at zero speed will drop while thrust at 8 mph will increase. Motor power is the same regardless.

On Friday, May 31, 2013, danbollinger wrote:

To a physicist, they are very different concepts. Thrust is a rotational unit of force. Power is a unit of work.

Energy / Time = Power

--- In electricboats@yahoogroups.com, John Francis <surv69@...> wrote:
>
> I don't understand how someone can say THRUST is not power, since the
> THRUST that an engine, along with gearing and a propeller, is the wash that
> is produced as yourr boat moves forward . . . and of course, what we're all
> looking for is to move our boats forward.
>
>
>
> On Thu, May 30, 2013 at 10:48 PM, John Riehl <riehlj2002@...> wrote:
>
> >
> >
> > By contrast, I attempted to use a 36 lb thrust MinnKota on a 1,800 lb 22'
> > MacGregor. It would move the boat, but couldn't push it against anything
> > more than about 10 kts of wind.
> >
> > *From:* Skip von Niederinghausen <farharbour@...>
> > *To:* electricboats@yahoogroups.com
> > *Sent:* Thursday, May 30, 2013 6:49 AM
> >
> > *Subject:* [Electric Boats] Re: Trolling motors ==> electric outboards
> > **
> >
> > Maybe I should mention to the group that years ago, I used a Min Kota
> > 24lb thrust trolling motor on my International Folkboat which was 26'
> > LOA and displaced about 5000lbs. This was in Annapolis Maryland where
> > there is little tide or currents. The motor was great for getting off the
> > dock at my house, then under the Eastport Bridge and out into the bay. I
> > used her for only overnight trips in the area and this system worked fine
> > for this limited use.** **Skip**
> > **-- **"The sky hides the night behind it and shelters the people beneath
> > from the horror that lies above."** -- Paul Bowles<http://www.goodreads.com/author/show/7659.Paul_Bowles>
> > ****
> >
> >
> >
> >
> >
>