Electric power boat

Discussion in 'Projects & Proposals' started by edmiokas, Jun 5, 2018.

  1. edmiokas
    Joined: Apr 2012
    Posts: 1
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Vilnius, Lithuania

    edmiokas New Member

    hey guys

    Finally I've decided to spent some money and start a garage project.
    I want to make small electric powerboat for one person (~25 mph or more) but I'm not good in electrics so I need some help, what dc motor should I use, what battery? lets say for 4-5 hours of running? boat weight about 70 lbs my weight ~140......... ok it will be in test day i promise .
    sorry for my english.
     
  2. alan craig
    Joined: Jul 2012
    Posts: 165
    Likes: 7, Points: 28, Legacy Rep: 14
    Location: s.e. england

    alan craig Senior Member

    You want to go 25mph? for 4 hours? 100miles?
    If you could do that at 25kW (about 18bhp) you would use all the energy in the very latest Tesla car battery. The battery alone would weigh more than your boat could support. Impossible.
     
  3. alan craig
    Joined: Jul 2012
    Posts: 165
    Likes: 7, Points: 28, Legacy Rep: 14
    Location: s.e. england

    alan craig Senior Member

    Error! Not spotted by anyone else? In the post above I should have said that 25kW is about 33bhp - got my conversion wrong way round.... and can't edit it.
     
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