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Run time off batterys

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Run time off batterys

Home › Forums › All things floating › Run time off batterys

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  • 17 June 2014 at 08:07 #49741
    CookieOld
    Participant
      @cookieold

      Hi Gents , I am building a 1:24 scale Perkasa and the power train is 1 off MFA 850 motor in the center and 2 off JP power speed 660 1 on each side. I will have 2off 12V 5000 mah, Nimh sticks wired in parrallel . The 850 motor will run all the time and the 660,s to have a bit of action nom and then . What run time could i expect to get with this setup.

      Thanks Dave smiley

      17 June 2014 at 08:07 #4110
      CookieOld
      Participant
        @cookieold
        17 June 2014 at 14:08 #49750
        Charles Oates
        Participant
          @charlesoates31738

          There are a too many variables in the set up for a meaningful estimate, but the most important one is missing, the prop sizes. This will have a huge effect on the current drawn. I suggest putting it in the test tank and measuring the current ofeach of the drives. This is not only for getting an estimated run time but also to make sure the wireing, esc, are ok for the job.

          18 June 2014 at 08:25 #49757
          ashley needham
          Participant
            @ashleyneedham69188

            Dave. Assuming about 10A for the 850 and min 5A for the 660`s, this gives 20A possible draw..perhaps more, or perhaps less. On an effectivly 10A batt this is….ooooooh. 30 mins or probably less duration, …, to all day…depending on how much time you spend with the throttle open.

            As Charles says.Youwill really only find out when you plonk it in the water !

            Ashley

            18 June 2014 at 09:41 #49761
            CookieOld
            Participant
              @cookieold

              Thanks Lads , Its looking like i will have to spent a lot more money on batterys to make my 2 hour Sunday morning sail a reallity .

              Cheers Dave

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