T-Pain Is On A Boat: Re: [Electric Boats] Re: New member

Friday, November 4, 2016

Re: [Electric Boats] Re: New member

I'm sure others have done it experimenting with pitches. Look at the Newport Vessels web site which has a chart that shows expected boat speed for each model. Mine is a 60 pound, which runs all the time as rower assist, and pushes me through some difficult ocean conditions at a consistent speed. My hope right now is to learn how many amp hours (in varying conditions) can I expect to use with reserve before suffering battery life cycles to diminish because of undercharge 70%? And other interesting things you all do with your electric boats. I want to buy another Newport Vessels with a higher thrust to see how much faster I can go. (I know it's either rpm or differing prop pitches...I asked them....and they wouldn't say. With Navionics or an ap like that will give good read outs for accurate boat speeds. Let me know what you are thinking anytime.

Bruce

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On Nov 4, 2016, at 11:25 AM, 'Pat' forums@greensdomain.com [electricboats] <electricboats@yahoogroups.com> wrote:

"They say the higher the thrust the faster the boat goes" - That is a correct statement, but it is only part of the story. If the motor can't go any faster, you can't go any faster even if the motor isn't producing its max power. Trolling motors are designed to push a heavy load slowly. If you put a trolling motor on a light boat, it still can't go much faster because the prop pitch is wrong. Think of it like a heavy duty road grader. They have motors that produce thousands of horsepower, but they can't go fast. If you want to go fast, you need a different transmission which serves the same purpose as varying prop pitches on a boat – maximize the power delivery at a desired speed.

Pat

From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
Sent: Thursday, November 03, 2016 10:03 AM
To: electricboats@yahoogroups.com
Subject: Re: [Electric Boats] Re: New member

Hi Curtis, thank you for the response.

Check out Newport vessels boat speed/thrust table. They say the higher the thrust the faster the boat goes....unlike Minn-Kota and others who say speed is not tied in with thrust. I don't know how Newport Vessels achieves the varying boat speeds amongst their various thrust choices.....higher rpms? Different blade pitches? Am interested in your experiments...let me know how things go.

Bruce

Sent from my iPad

On Nov 3, 2016, at 6:42 AM, cpcanoesailor@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

Welcome Bruce,

I'm interested in improving the hydrodynamic efficiency of trolling motors as well as electrical efficiency. I have plans to experiment with different props and to build a wing to enclose the motor shaft. Also, PWM control, and capsize-proofing the whole propulsion system. So please keep us up to date, and feel free to ask questions.

Curtis

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Posted by: bruce thomas <mosslandingcreatures@gmail.com>

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