Boat weight

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  • G-UNIT
    Senior Member
    • Nov 2009
    • 949

    #1

    Boat weight

    What is the going weight on most of the black jacks out there after mods and paint? mine weighed in at 4.44 lbs, that's without batts and reinforcing the hull for strength with some glass cloth and resin and paint job.
    I'm alittle dissapointed with the speed w/6s but I still need to play with the trim and cog, so far only 45.5 mph.
    swordfish 120, speedmaster hardware, flight max 5000 mah 40c-50c 3sx2,
    in hull water cooling.
  • tiqueman
    Fast Electric Addict!
    • Jul 2009
    • 5669

    #2
    Originally posted by G-UNIT
    What is the going weight on most of the black jacks out there after mods and paint? mine weighed in at 4.44 lbs, that's without batts and reinforcing the hull for strength with some glass cloth and resin and paint job.
    I'm alittle dissapointed with the speed w/6s but I still need to play with the trim and cog, so far only 45.5 mph.
    swordfish 120, speedmaster hardware, flight max 5000 mah 40c-50c 3sx2,
    in hull water cooling.
    Im guessing stock motor? What prop? I havent reinforced mine.. but if I get a chance I will weigh it up.
    Geico epoxy laminate hatch sale thread Black Jack epoxy laminate hatch sale thread
    HPR06 6S Twin HOTR Genesis (SOLD) Vantex 32" cat Geico racing
    WEST FL MODEL BOAT CLUB www.scottskiracing.com

    Comment

    • G-UNIT
      Senior Member
      • Nov 2009
      • 949

      #3
      Yes stock motor and x642 prop

      Comment

      • tiqueman
        Fast Electric Addict!
        • Jul 2009
        • 5669

        #4
        try dropping to a 442. Ive got a 32" cat that will run 3mph faster on a 442 than a 642. Lets the motor spool up more I guess
        Geico epoxy laminate hatch sale thread Black Jack epoxy laminate hatch sale thread
        HPR06 6S Twin HOTR Genesis (SOLD) Vantex 32" cat Geico racing
        WEST FL MODEL BOAT CLUB www.scottskiracing.com

        Comment

        • G-UNIT
          Senior Member
          • Nov 2009
          • 949

          #5
          What about a x640, I think it will be my next prop so I;ll have a 640 / 642 / 645, alittle of both ranges.

          Comment

          • tiqueman
            Fast Electric Addict!
            • Jul 2009
            • 5669

            #6
            Im thinking youll have more luck w/ the 640. I think the 645 is going to be a bit much. Keep an eye on the temps. Im curious to see what you end up with.
            Geico epoxy laminate hatch sale thread Black Jack epoxy laminate hatch sale thread
            HPR06 6S Twin HOTR Genesis (SOLD) Vantex 32" cat Geico racing
            WEST FL MODEL BOAT CLUB www.scottskiracing.com

            Comment

            • G-UNIT
              Senior Member
              • Nov 2009
              • 949

              #7
              Picked up the x640 prop along with flex shaft , drive dog flex cable, now to assy it all and have a complete set up like my x642 and x645.
              Just pull one assembly out and slide a different one in. I'll keep you posted on the different results when I get the x640 set up.

              Comment

              • bwells
                Senior Member
                • Jan 2009
                • 842

                #8
                G-unit, here are numbers. Stock BJ with 642 3.42 lbs and my modified weighs in at a hefty 4.117 with an M445. That carbon fiber made you fat. Just kidding!!!

                Comment

                • G-UNIT
                  Senior Member
                  • Nov 2009
                  • 949

                  #9
                  Yea the fiberglass reinforcement did add weight, 4.44lbs w/o batterys, although I did get rid of the 4 aa battery packso I;ll weigh it again later and see how that helped.

                  Comment

                  • bwells
                    Senior Member
                    • Jan 2009
                    • 842

                    #10
                    That will lighten it up but is that the remedy or do you need to look at props aswell. Tiqueman suggested a 4 series or 5

                    Comment

                    • G-UNIT
                      Senior Member
                      • Nov 2009
                      • 949

                      #11
                      I'm in the processes of puting togeather a x640 but I got the wrong size drive dog, i'ts alittle large in diameter so I need to exchange it.

                      Comment

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