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Micro Trex150 Tail Judder

Discussion in 'Helicopters' started by Les wood, Jun 13, 2019 at 3:29 PM.

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  1. Les wood

    Les wood New Member

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    Hi there,

    I'm new to my Trex 150. It's a new Heli and I have a tail issue.

    Model hovers lovely and smooth and seems set up well out of the box.

    My issue is whilst it's in a hover, or flying around, I have this tail judder that is not constant. It is dead smooth for a few seconds then I get a judder then it settles again, and so on and so on, like a heart beat almost if you get me.

    Any ideas of what it could be?

    Thanks in advance
     


  2. Tony

    Tony Administrator Staff Member

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    I'm not sure what a 'judder' is. Is there anyway you can get us a video of what it's doing? If not, have you tried playing with the tail gain adjustments?
     
  3. Les wood

    Les wood New Member

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    Hi,

    By judder I mean a wag, but only for a split second then it stops, then 2 seconds later a quick wag, then stops.....and so on
     
  4. Tony

    Tony Administrator Staff Member

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    Make sure the motor is spinning free and that your tail blade is tight on the shaft. If that doesn't work, you may need to adjust some tail settings in the gyro or play with the gains.
     
  5. Les wood

    Les wood New Member

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    The heli is brand new , I have tried adjusting the gain but it makes no difference.

    It's not like your normal gain wag, it's like an electrical interference for a split second. I'll try get a video over the weekend.

    Thanks
     
  6. Les wood

    Les wood New Member

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    I have taken a short video but it's too large to upload.

    Can I email it you?
     
  7. Tony

    Tony Administrator Staff Member

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    Upload it to youtube then post the link here.
     
  8. Les wood

    Les wood New Member

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    Not the best video but if you listen carefully you can hear the stutter
     
  9. Tony

    Tony Administrator Staff Member

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    Something that small might just be normal for that heli. I don't think so, but it could be.

    Double check the tightness of your main blades. They should be pretty loose on a bird this small. Just enough to know the grips are clamping onto the blades without any slop, but loose enough that the blades can move easily. If this is not normal, then I'm thinking that is a harmonic vibration issue.
     
  10. Les wood

    Les wood New Member

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    thanks for your advise, ill check a few things when im home later.

    I have had main blades loose and nipped up, makes no difference.

    Im not new to Helis just his one.

    It feel like an electrical glitch rather than a reaction to harmonics of gain set up, its like an electrical interference that causes the stutter ??
     
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