Adding gas engine to 4m electric boat

Discussion in 'Hybrid' started by kirtley, Nov 9, 2009.

  1. kirtley
    Joined: Nov 2009
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    Location: Brisbane, Australia

    kirtley New Member

    I have a nice little 4m boat that runs on electric - about 350kW motor (i.e. 0.5 Hp). Obviously, speed is limited so I am wondering about adding a small (3Hp) gasoline motor. I guess this should double my speed so I can use it for short blasts to get where I want to be then switch back to electric. Do you think this is feasible? How would you connect the two motors (the electric system is a simple parallel belt drive - I will take out one bank of batteries and install the engine there) so that I can switch easily between them? Are there any dangers I should be aware of?
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    The photo doesn't show the belt arrangement. A second electric motor or a bigger one would be an easy fix.
     
  3. kirtley
    Joined: Nov 2009
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    Location: Brisbane, Australia

    kirtley New Member

    Yes, thanks gonzo! I was also considering that. Here's a better picture:

    http://www.electraboat.com/electric-boat-flotation-2.jpg

    I actually have 2 more of the same motors, so I guess I can just try mounting them parallel, with a belt joining them, or run another belt independently to the prop? Which would be the best arrangement do you think?

    Thanks for all the help - I'm really glad I asked now!
     

  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Ideally, you should be able to diconnect it to prevent friction losses and extra wear. An A/C automotive clutch could work.
     
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