ESC For Brushed Motor-Newbie Question

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Invader1
    Junior Member
    • Jan 2011
    • 9

    #1

    ESC For Brushed Motor-Newbie Question

    More stupid questions-please bear with me the last time I played with model anythings I was in my teens and I'm now in my 60's. Old school.
    I have a Graupner Speed 700 Turbo that will be going into a 1/12 Finlay shovelnose hydro. I have two props-one is a 40MM 2.20 pitch, the other is a 38MM 2.09 pitch
    plans call for an X642 42MM 2.64 pitch. The motor will be powered by two Turnigy 2S1P 7.4 volt 3300mah 30-40c wired in series.
    Would the Pro Boat brushed ESC that Steve has (even though he is out of stock) work O.K. in this application? It is attractively priced helping to keep the cost down but it might just go up in flames first time out. The Graupner box says idle current drain 2.5A, current drain at max efficiency 12.5A, Blocking current drain 65A,and it seems most ESC's are not rated for 14.4 volts-will the voltage be the death of most ESC's?
    Somewhere I was reading about a brushless ESC that would let you run a brushed motor without harming the ESC-the little gremlins in the ESC figure out which type of motor you have, but again I wonder about the voltage and amp ratings.
    I would appreciate any recommendations that you would send my way.
    If all this works out O.K. and the boat doesn't implode or I run it into dry land then I will probably swap the motor over to a brushless unit in the future at which time I will need more recommendations.
    Thank You
    Invader1
  • BHChieftain
    Fast Electric Addict
    • Nov 2009
    • 2051

    #2
    For a 4s1p configuration I would think about at least a 120A esc. I personally use a 240A esc on my 29" 4s mono but that is probably overkill. I am about to try a Seaking 180 on a 30" shovel on 4s (with a proboat motor)

    Chief

    Edit- sorry, didn't see the "brushed" part-- DOH
    Last edited by BHChieftain; 12-15-2011, 09:08 AM.

    Comment

    • Alexgar
      Fast Electric Addict!
      • Aug 2009
      • 3701

      #3
      hes talking brushed chief
      take a look at the evx2 esc for 16.8 volts brushed

      Comment

      • Mattwarner
        Senior Member
        • Aug 2011
        • 495

        #4
        Take a look here at the Jeti Navy 600, this is designed for brushed motors 10 cells and over (NIMH) so should be ok to run on 4s, I may be wrong but the EVX2 is designed for dual motors?

        Comment

        • 785boats
          Wet Track Racing
          • Nov 2008
          • 3423

          #5
          When we ran the brushed 700's the ESC of choice here was the AstroFlight 207d Marine controller. Here's a link to AstroFlight. There's no picture of the ESC but it is the same as the 204d above it.

          Paul.
          See the danger. THEN DO IT ANYWAY!!!
          http://forums.offshoreelectrics.com/...hp?albumid=319
          http://forums.offshoreelectrics.com/...hp?albumid=320

          Comment

          • Flying Scotsman
            Fast Electric Adict!
            • Jun 2007
            • 5195

            #6
            To be honest ditch the brushed system and go brushless with a suitable ESC.

            Douggie

            Comment

            Working...