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450x savox/reciever issue?

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  • 450x savox/reciever issue?

    Hi guys, have just had my 450x back from horizon after a vibration issue I that I just could not find lol
    I got the heli back and they have replaced the ar7200bx and tail shaft/grips etc but have also removed my savox tail servo saying it would not be fast enough? I decided to take their word and fly it anyway...
    First flight/set up, not a problem!
    2nd flight started well but between 2/3 mins in as I went inverted and came down on the left stick the heli seemed to lose power (even though I was in idle up)
    3rd flight the heli took 3 attempts to bind and upon take off became very unpredictable. . I hovered at around 5feet and gave a sharp input upwards on the left stick, the heli took a second to react and then shot upwards for longer than I had held the stick, as I came back to mid stick to allow the heli to fall it came back to ground as if I had given a full negative pitch input? The heli then returned to a hover and as I tried again the exact same thing happened, I again returned to a hover a few feet infront of myself where the heli stayed stable for a few seconds, suddenly it tipped backwards and came at me even though I gave no elevator input what so ever??! I decided best to call myself lucky and leave it until I had better chance to look it over!
    I tried to re bind the heli to my dx8 and after several attempts had no joy, then I swithed the battery for a brand new one horizon had sent and got the heli to bind on first attempt?! All ar7200bx settings were correct, plus sensor directions etc and I made sure no servos or swash were binding, all moved freely etc. .
    Back to the field and the heli is still the same, the slightest pitch input either way on the transmitter is alot more than it should be in the air and also seems somewhat delayed?....or the heli has developed a mind of its own lol
    The heli has savox cyclic servos, an apparently new ar7200bx and I use a dx8 transmitter, does anyone have any ideas what could be at fault or what I could be doing wrong?
    P.s sorry foe the longwinded description lol
    Cheers guys
    Dan

    Goblin 700c carbon - Xnova, Brain2
    Goblin 570 - Scorpion, Tribunus, Brain2
    Goblin 420 - Xnova, Brain
    Dx9 black

  • #2
    Have you perhaps got the AR7200BX parameter menu B not in "transmitter mode" (blue), with conflicting expo settings in your TX? Also, check servo frequencies are set correctly?
    Tom
    sigpic Synergy E7SE - Kontronic Helijive 120+ ESC, vBar Neo
    SAB Goblin 630 Competition
    - Castle Edge 120HV, vBar Neo
    Blade 700X - Castle Edge 160HV ESC, Mini vBar
    Logo 550SXv2 - Castle 130LV ESC, vBar Neo
    .... and a Gaui X3
    Spektrum DX8 ; Mikado VBC ; RealFlight 7 & neXt sims
    ... and two EGS'



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    • #3
      No dude, first thing I checked (before first flight) was servo frequency. Savox website says 333 but the ar7200 only goes up to 200?!
      When it came back parameter B was red (sport) so I changed back to blue (tx) before I flew
      I performed an update on my dx8 just last week and my 130x seems to fly exactly as before so im pretty much ruling out a problem with the transmitter
      Dan

      Goblin 700c carbon - Xnova, Brain2
      Goblin 570 - Scorpion, Tribunus, Brain2
      Goblin 420 - Xnova, Brain
      Dx9 black

      Comment


      • #4
        Any ideas please folks im still stumped lol
        Dan

        Goblin 700c carbon - Xnova, Brain2
        Goblin 570 - Scorpion, Tribunus, Brain2
        Goblin 420 - Xnova, Brain
        Dx9 black

        Comment


        • #5
          Try popping all the swash and blade grip links off and make sure everything is mechanically smooth. The delayed collective response sounds very similar to a problem I read about a month or so ago (on a different heli). I think the solution was main grip radial or thrust bearings. Anyway - check that swash movement is completely smooth (with the cyclic servos links popped off), and that the blade grips move 100% smoothly and NOT notchy in any way.

          Assuming the servos and BX is OK ... it has to be mechanical I would guess ...
          Tom
          sigpic Synergy E7SE - Kontronic Helijive 120+ ESC, vBar Neo
          SAB Goblin 630 Competition
          - Castle Edge 120HV, vBar Neo
          Blade 700X - Castle Edge 160HV ESC, Mini vBar
          Logo 550SXv2 - Castle 130LV ESC, vBar Neo
          .... and a Gaui X3
          Spektrum DX8 ; Mikado VBC ; RealFlight 7 & neXt sims
          ... and two EGS'



          Comment


          • #6
            Thanks I will give that a try
            Yes horizon replaced the bx and I bought the servos literally just before I sent it back so both are brand new... thats the frustrating thing, the more money I throw at my helis the less luck/more problems I have I have just bought a trex 550 dfc and im honestly too scared to fly it now lol
            Thanks dude
            Dan

            Goblin 700c carbon - Xnova, Brain2
            Goblin 570 - Scorpion, Tribunus, Brain2
            Goblin 420 - Xnova, Brain
            Dx9 black

            Comment

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