Electric Propulsion Small Homemade Boat

Discussion in 'Electric Propulsion' started by Adam Kane, Oct 16, 2020.

  1. Adam Kane
    Joined: Oct 2020
    Posts: 1
    Likes: 0, Points: 1
    Location: Tuscaloosa, AL

    Adam Kane New Member

    Hello all,

    I am working on a small boat and looking for a motor/encoder to use. The boat will be about 45 lbs (total, including load). The design is a PVC frame hooked onto two inflatable life rafts.

    Pololu - 6.3:1 Metal Gearmotor 37Dx65L mm 12V with 64 CPR Encoder (Helical Pinion) https://www.pololu.com/product/4757/specs

    Will this motor be able to power my boat? I will need it to reach speeds of about 4ft/s, and it will be operating with a 12 V voltage source. It will only be tested in calm waters. I have not chosen a propellor to go with the motor, so pitch and diameter specifications can be adjusted.

    I have tried to calculate if this will work, but there are so many variables that I am getting lost. Does anyone have experience with this type of application?

  2. kerosene
    Joined: Jul 2006
    Posts: 1,279
    Likes: 199, Points: 63, Legacy Rep: 358
    Location: finland

    kerosene Senior Member

    12 Wats with an efficiency of ~50% plus a gearbox losses doesn't sound very powerful.

    I failed to get any kind of idea what your boat is like. Can you post even a crude sketch? Also dimensions are crucial - length and weight especially.
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