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Thread: Fail safe failing

  1. #1
    Join Date
    May 2020
    Location
    NS
    Posts
    35

    Default Fail safe failing

    I have a 4s TFL Arrow Rigger it runs a 3300 KV typhoon 2960 motor a 45 c 3300 mah gens ace lipo a 150 amp Flycolor esc and either a gt2 flysky radio or a crv2 ch radio 15 kg savox steering servo weighs 1530 g runs a 38x1.6 cnc 2 blade alloy prop at 65.5 mph or 105.5 kmh the issue is if O flip it upside down in choppy water or cornering to fast or to tight the fail safe shuts it down Instantly and it won?t rev or steer while upside down which would be great if it stayed that way but about 40 seconds later it starts revving flat out and with the prop making contact with the water it takes off in a circle until I catch it in my canoe or it smashes into something or the motor burns out.
    I have tried all I know like different receivers and transmitters nothing helps I set and check the fail safe each time I power up.ince it?s revving there is no radio control it?s unresponsive and out of control.
    Has anyone had this issue. ???
    I run in salt water it?s like the receiver antenna sitting in the salt water once it upside down is not receiving hence no control and the fail safe kicking in but why it only last 40 seconds then takes off I have no clue. Both Flycolor esc I have do the same thing both radios do the same thing. It?s costly and heart attack material.

  2. #2
    Join Date
    Jun 2018
    Location
    ny
    Posts
    215

    Default

    in my experience with similar situations, it ends up being water shorting the signal and power wires on the receiver, causing the esc to think that it should be going full throttle. only way round this is make sure your reciever is in a completely waterproof enclosure. i have yet to not have issues with it in my gas boat...LOL but i did just get a Killer Bee for it so hopefully it will kill it if that happens.

  3. #3
    Join Date
    May 2020
    Location
    NS
    Posts
    35

    Default

    Does a killer bee type cut out switch exist for retrofitting to brushless system
    Last edited by RC boat addict; 09-15-2020 at 07:47 PM. Reason: Spelt bee wrong

  4. #4
    Join Date
    Jun 2018
    Location
    ny
    Posts
    215

    Default

    Not that i am aware of... i have yet to get mine set up either for the gas boat...

  5. #5
    Join Date
    Apr 2007
    Location
    ON
    Posts
    8,759

    Default

    Salt water, even a small bit in the hull from the shaft or anywhere will kill electronics. Look very, very closely at the ESC connectors to see if there is any corrosion on there.

    Maybe try a different esc??

    Not sure. Eventually someone will help you figure it out.
    Nortavlag Bulc

  6. #6
    Join Date
    May 2020
    Location
    NS
    Posts
    35

    Default

    OK this is what I am going to try.
    I think when I crash (flip) my rigger it momentarily puts a huge load on the steering servo and the bec in the flycolor is 5 amp, the servo amp spike might be exceeding 5 amp and this spike I think might be causing a brown out, these brown out can cause all sorts of issues from what I have read like, receiver fail safe or bind issues.
    This is probably impossible simulate (to make happen on the bench).I am pretty scared to test it by running it and flipping it,I will have to think of a way to reduce the risk of spending more money on the failures though.
    The cure seams to be whats called a glitch buster its basically a capacitor connected into any open port on the receiver.
    I am thinking 16 volt as I am running 4s and from 2200 uf to 4700 uf.
    I will come back with the results, it may be a while I have to buy and fit the replacement motor that was burnt out.

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