Prather lap cat Question

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  • 30nitro
    Senior Member
    • Feb 2018
    • 330

    #1

    Prather lap cat Question

    Just picked up a lap cat..36" glass ..was nitro outboard.... Someone started a brushless conversion...strut mounted....flex there also....Any suggestions for a motor..? 40-92.....?? 56 mm.... Mabe some other thoughts? Thanks
  • Alfa Spirit
    Fast Electric Addict!
    • Oct 2009
    • 2131

    #2
    With a 36 hull you can run 6S with 1500kv motor 4082 size

    Comment

    • Jesse J
      scale FE racer
      • Aug 2008
      • 7116

      #3
      Need to know your goals with this boat.
      Speed and handling requirements (SAW vs oval racing or sport)
      Are you on a tight budget or prepared to get quality components.
      "Look good doin' it"
      See the fleet

      Comment

      • 30nitro
        Senior Member
        • Feb 2018
        • 330

        #4
        Thanks for the responses, Have some quality equipment...Other boats too...just not real familiar with this hull..being nitro born....goals would be...decent handling.....good straight speed.....

        Comment

        • HTVboats
          Senior Member
          • Jun 2011
          • 803

          #5
          With a 6s 40X82 outboard you have more power than the Prather is capable of handling other than a straight line. It wasn't a great nitro hull with less power. Not what you want to hear but make it a sport boat and have fun with it. Stay low on KV and props and enjoy the longer run times.
          Mic

          Mic Halbrehder
          IMPBA 8656
          NAMBA 1414

          Comment

          • 30nitro
            Senior Member
            • Feb 2018
            • 330

            #6
            Well...it WAS an outboard...now is an inboard with stuffing tube and 3/16 flexi...

            Comment

            • 30nitro
              Senior Member
              • Feb 2018
              • 330

              #7
              Originally posted by Red Cat II
              I have a Prather lap catII that was 7.5 nitro. Want to convert to Electric., if I use the following components can anyone tell me if these will work together , proboat 1500kv, GOLDBAT 1500mAh 100C 14.8V 4S LiPo Battery Pack ,Flycolor Waterproof 150A Brushless ESC & 5.5V/5A BEC for RC Boat V2P0. I will not be racing just sport running. I am new to this forum and would appreciate any advise I can get.
              I started this thread......I'm still workin on mine...when life's not in the way.....it's a heavy hull....your set up thoughts might have to be uped a bit......when i got mine it was half a-s set up with a 56 / 94 1200 kv...on 6 s... with 1/4 flexy set up....never ran it with that... but the guy i got it from claimed 55mph..... still in the air what to put in it.....

              Comment

              • Alfa Spirit
                Fast Electric Addict!
                • Oct 2009
                • 2131

                #8
                For a Lap Cat II prefer 4S with 2000kV motor (outboard).
                Last edited by Alfa Spirit; 04-14-2019, 08:57 PM.

                Comment

                • Red Cat II
                  Junior Member
                  • Feb 2016
                  • 3

                  #9
                  With the specs I gave for my Lap cat II I. E. proboat 1500kv, GOLDBAT 1500mAh 100C 14.8V 4S LiPo Battery Pack ,Flycolor Waterproof 150A Brushless ESC & 5.5V/5A BEC for RC Boat V2P0. Will this set up work or do I need to make modifications to my components?

                  Comment

                  • Fluid
                    Fast and Furious
                    • Apr 2007
                    • 8012

                    #10
                    Red Cat, you should start a new thread, your posts are too confusing here. The short answer to your question - NO. The battery is inadequate in capacity, expect around one minute of run time. You will want at least 4000 mAh capacity, more gives longer run time. The ESC is fine, the motor a bit small in size but will work. Lots of drag in that hull.


                    .
                    ERROR 403 - This is not the page you are looking for

                    Comment

                    • Alfa Spirit
                      Fast Electric Addict!
                      • Oct 2009
                      • 2131

                      #11
                      Lenght is 32'' (?), 4S is fine.

                      Battery capacity used are 4000 or 5000mAh.

                      Comment

                      • Red Cat II
                        Junior Member
                        • Feb 2016
                        • 3

                        #12
                        Thanks everyone, I will start a new post for future questions

                        Comment

                        • akula
                          Member
                          • Dec 2009
                          • 30

                          #13
                          Originally posted by Alfa Spirit
                          Lenght is 32'' (?), 4S is fine.

                          Battery capacity used are 4000 or 5000mAh.
                          NO ! 6S for less Amps.
                          Just try ton build a boat to give advice.

                          Comment

                          • HTVboats
                            Senior Member
                            • Jun 2011
                            • 803

                            #14
                            I agree that 6S is the better way to go. It does require NOT going crazy with wattage. I have a 36" tunnel with a cheap Flycolor 150 and a Turnigy 36X74 1600kv that are $100 combined. Runs low 50's all day long with an m445 prop. On 4S with a 2200kv 36X74 to get that performance the controller would run hot due to 33% more amps required to do the same work. Same motor and esc on 6S in a hydro goes into the 60's. Not super performance but reliable power and respectable speeds. Just going to more volts does not mean you have to go mega on the motor.
                            Mic

                            Mic Halbrehder
                            IMPBA 8656
                            NAMBA 1414

                            Comment

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