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Flat battery run away truck !

Discussion in 'HPI Savage XL' started by Jmapp94, Sep 12, 2017.

  1. Jmapp94

    Jmapp94 New Member

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    Hi,

    New to all this, just purchased my first truck so please bare with me, took it out for its first spin when it arrived, after about ten minutes the battery was low on charge and the truck lost signal with the controller and locked on full throttle and there was nothing I could do, is there any Solution to this ? I have since fitted the hpi battery level indicator.

    Thanks.
     
  2. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    are you using a 6 volt hump battery for this rig? make sure it is fully charged and ready for running before starting it up...
     
  3. NightFlier X4.6

    NightFlier X4.6 Well-Known Member

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    Also is there a throttle return spring on the carb?
     
  4. Jmapp94

    Jmapp94 New Member

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    Thanks for the reply
    It is the 6v battery yes, and I do always make sure it's charged before i run it.
     
  5. Jmapp94

    Jmapp94 New Member

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    Thanks for the reply

    And yes I believe there is a return spring in place
     
  6. espdgonzo

    espdgonzo Member

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    If that battery had a full charge and then you lost it might be that hump not holding charge and time to replace it. Bad cells. Is the return spring install right? That thing should of close the carb when power was lost.
     
  7. savagemanXL

    savagemanXL Member

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    The easy remedy is to use a 'fail safe' type receiver. You set it so the throttle goes to idle if signal is lost. Tou can purchase separate 'fail safe' devices, but these have to have their own receiver to work.
     
    • Disagree Disagree x 1
  8. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Not true, I have several failsafes that plug into the throttle channel and the servo plugs into a port on the failsafe, these work very well, in fact I still use a couple on my trucks that are not upgraded to a failsafe receiver unit as yet.....
     
    • Agree Agree x 1
  9. NightFlier X4.6

    NightFlier X4.6 Well-Known Member

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    Also the fail safe is useless if you lose power it only works if you have power at time of radio interruption.
     
    • Agree Agree x 1
  10. provost

    provost Member

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    I have learnt from the help of the kind people on the RCNitrotalk forum that multiple measures are the best approach.

    - Hump pack (charged) and batterly level indicator
    - Fail safe that locks the brakes on if radio signal is lost
    - Throttle return spring just in case everything goes pear shaped.
    This is the spring I put on my HPI Trophy:
     
  11. Jmapp94

    Jmapp94 New Member

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    Thanks for your replys guys,

    I don't get much time to play about with it during the week so I'm going to have a look at these fail safes and a return spring, also going to pop down to the local shop, as I say I'm a complete newbie with it being my first truck.
     
  12. GAJ

    GAJ Well-Known Member

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    The newest XL's have a failsafe in the 2.4 system, but you must test it.

    If you have the servo reversed, your failsafe may put it to full throttle. You may need to reset.
     
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