ESC Recommendations

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  • Thee See 5
    Junior Member
    • Jun 2012
    • 3

    #1

    ESC Recommendations

    I have a 49" aeromarine donzi that I am converting gas to electric, I plan to run 8s only in this boat. I have this motor



    KV: 780KV
    Max power: 7350W
    Poles number: 4
    Max voltage (LiPo): 9S (780Kv)
    Max Amps: 195A (780Kv)
    No load current: 2.8A (780Kv)
    Diameter: 56mm
    Length: 112mm

    Propeller will be octura x457.

    Will a Swordfish X+ 200A ESC work with this setup? My goal is 50MPH.

    Any suggestions appreciated.
  • srislash
    Not there yet
    • Mar 2011
    • 7673

    #2
    I would run a SW 240 myself. There shouldn?t be anything wrong with 8s in that boat. Just make sure you run 8s2p, or 8s 10,000mah or more.


    BTW, is this your first FE boat?

    Shawn

    Comment

    • NativePaul
      Greased Weasel
      • Feb 2008
      • 2760

      #3
      8s in a 49 inch heavy gas converted mono smells like unnecessarily high amp draw to me, unless you are confined to 8s by class rules I would use a higher voltage to reduce the amp draw at a given speed.
      Paul Upton-Taylor, Greased Weasel Racing.

      Comment

      • photohoward1
        Fast Electric Addict!
        • Mar 2009
        • 1610

        #4
        Goal is only 50. He won?t be pulling a lot of amps. That set up with the right prop should work.


        Sent from my iPhone using Tapatalk

        Comment

        • Fluid
          Fast and Furious
          • Apr 2007
          • 8012

          #5
          The x457 prop is very small for that setup, amp draw should be relatively low. 8S gas boats with 800-850 Kv motors normally run props in the 65-70 mm range, that’s a 50% increase in the thrust cone area. How efficient that prop will be on such a large draggy boat is the real question, will it be able to reach 50 mph? All those strakes should help. I assume it is a full surface drive boat.


          .
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          Comment

          • Thee See 5
            Junior Member
            • Jun 2012
            • 3

            #6
            This is my first large gas to electric conversion boat, Im coming from 1/5 scale electric cars.
            I am limited to 8s due to motor and would prefer to stay at 8s so I wouldn't have to purchase any more batteries.

            Which prop would you recommend then?

            Thanks.

            Comment

            • photohoward1
              Fast Electric Addict!
              • Mar 2009
              • 1610

              #7
              Start with the 457. See how it goes.
              I think you will be surprised.


              Sent from my iPhone using Tapatalk

              Comment

              • TRUCKPULL
                Fast Electric Addict!
                • Apr 2007
                • 2971

                #8
                What batteries do you have now?
                # of cells, -- mHa, -- "C" rating, --- Make?

                Larry
                Past NAMBA- P Mono -1 Mile Race Record holder
                Past NAMBA- P Sport -1 Mile Race Record holder
                Bump & Grind Racing Props -We Like Em Smooth & Wet

                Comment

                • Thee See 5
                  Junior Member
                  • Jun 2012
                  • 3

                  #9
                  4x 4s 7200mah gensace 70c in 8s2p 14400mah total

                  Comment

                  • srislash
                    Not there yet
                    • Mar 2011
                    • 7673

                    #10
                    Originally posted by photohoward1
                    Start with the 457. See how it goes.
                    I think you will be surprised.


                    Sent from my iPhone using Tapatalk
                    Agreed Howard, I think I may only have a 455(or less) on this 45” Dumas (600kv 12s)

                    Comment

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