1/4 flex cable/ stuffing tube issue

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  • racerr73
    Senior Member
    • Oct 2007
    • 133

    #1

    1/4 flex cable/ stuffing tube issue

    Hi,
    Just finished and ran for first time on weekend my U-3 1/8th scale hydroplane and after inspection of 1/4 inch flex cable, there is a burn mark about 2-3 inches on cable at coupler end. This mark lines up with support brace in hull which you can see the epoxy has got hot and started running. The boat requires a "s" bend stuffing tube due to not being able to fit the cowling on with the dummy engine in the right place. The stuffing tube is 11/32 OD with a teflon liner. The teflon line about 2 inches from couple end is softer then the rest as well due to heat.

    The question is would i get away with running a 1/4 cable in 11/32 tubing without a liner, i know 5/16th is the correct size but the last thing i want to do is remove and make a new 5/16th stuffing tube for it. Below are 3 pics showing the stuffing tube and the brace near the coupling.
    Hope you can assist me in what to do.
    Trev

    003.jpg002 (1).jpg004 (1).jpg
    Last edited by racerr73; 09-10-2024, 05:50 AM.
  • fweasel
    master of some
    • Jul 2016
    • 4279

    #2
    What kV is the motor and what voltage are the batteries? If the RPM is reasonable, yes, I'd run that cable in the existing stuffing tube with no liner.
    Vac-U-Tug Jr (13mph)

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    • racerr73
      Senior Member
      • Oct 2007
      • 133

      #3
      The motor is a TP4070 910kv and the boat runs on 10s 6000mah packs.
      Thanks
      Trev

      Comment

      • fweasel
        master of some
        • Jul 2016
        • 4279

        #4
        You'll be fine.
        Vac-U-Tug Jr (13mph)

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