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  1. #1

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    Uncontrollable B4.1

    1 Week ago I upgraded both of my cars (TC4 and B4.1) to 2.4ghz. Since then I haven't been able to drive it because it goes backwards when I try to go forwards, vice versa, and it goes faster backwards than forwards. However I didn't have any trouble with my TC4.

    Electronics
    XP Digital SC450-BL ESC
    Reedy 3300kV Brushless Motor
    Futaba 4PL Transmitter
    Futaba R2104GF Receiver

    Possible Problems
    I had to unplug the motor wires to clean the car.
    The receiver/transmitter has to be setup.

  2. #2
    nitrosportsandrunner's Avatar
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    RE: Uncontrollable B4.1

    sounds like you just need to swap 2 of the motor wires.
    SC10rs, 1/6 hummer crawler, Kyosho Twin Force, Lunchbox project, Techone P51,

  3. #3

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    RE: Uncontrollable B4.1

    The thing is that I do not know what order I should put them in; they came unlabeled.

  4. #4

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    RE: Uncontrollable B4.1

    Ok...You were right...but it still goes faster backwards than forwards.

  5. #5
    nitrosportsandrunner's Avatar
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    RE: Uncontrollable B4.1


    ORIGINAL: DriftingFast

    Ok...You were right...but it still goes faster backwards than forwards.
    OK, put the motor wires back the way they were....
    then...
    change the reversing switch on the radio(the throttle channel) then recalibrate the ESC to the radio.
    SC10rs, 1/6 hummer crawler, Kyosho Twin Force, Lunchbox project, Techone P51,

  6. #6

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    RE: Uncontrollable B4.1


    ORIGINAL: nitrosportsandrunner


    ORIGINAL: DriftingFast

    Ok...You were right...but it still goes faster backwards than forwards.
    OK, put the motor wires back the way they were....
    then...
    change the reversing switch on the radio(the throttle channel) then recalibrate the ESC to the radio.
    +1 - You beat me to the punch; I was going to say the same thing


  7. #7

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    RE: Uncontrollable B4.1


    ORIGINAL: nitrosportsandrunner


    ORIGINAL: DriftingFast

    Ok...You were right...but it still goes faster backwards than forwards.
    OK, put the motor wires back the way they were....
    then...
    change the reversing switch on the radio(the throttle channel) then recalibrate the ESC to the radio.
    I already tried that, it won't start if I do that. I have to have the throttle on normal, turn it on, and then put the throttle mode in reverse.

  8. #8
    nitrosportsandrunner's Avatar
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    RE: Uncontrollable B4.1

    some ESC's only like the transmitter in norm or revs. sounds like yours likes normal.

    so, i take it if you put the tx in norm, and program the ESC thats when you get the truck going backwards instead of forwards?


    typically when you have an issue like yours its solved either by programing the ESC with the Tx in the opposite setting from what it was in...or just swapping 2 of the motor wires.

    some ESC's have a "motor direction" setting. maybe yours does and it needs to be changed?
    SC10rs, 1/6 hummer crawler, Kyosho Twin Force, Lunchbox project, Techone P51,

  9. #9
    ThunderbirdJunkie's Avatar
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    RE: Uncontrollable B4.1

    You have to recalibrate the ESC if you reverse your throttle channel, as nitrosportsandrunner clearly stated.
    \"Some people can mess up an anvil with a rubber hammer\" -46u
    If you don\'\'t allow yourself to fail, you\'\'ll never allow yourself to succeed-ThunderbirdJunkie

  10. #10

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    RE: Uncontrollable B4.1

    I fixed it. First I reversed the throttle, then I reversed the steering, and last but not least I had to re-calibrate the throttle settings.


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