Coaxial Cinestar...

Discussion in 'Cinestar Misc' started by Benjamin Rowland, Jan 26, 2013.

  1. Howard Dapp

    Howard Dapp Active Member

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    Hi Ziv, I remember seeing your videos some time ago. I remember thinking to myself while watching "nice commentary" :)

    Are you the same guy that tested the Axi 4120 motors on a coax? How did that go?
     
  2. Josh Lambeth

    Josh Lambeth Well-Known Member

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    May have to build one of these for my second copter...

    Josh
     
  3. Brad McGiveron

    Brad McGiveron Active Member

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    Go Ziv! lets see 16;)


    Anyways this is the setup that I've been flying for the last 6 months for work (yes... still making the rats nest for power dist wires, its not as clean as some of you folks builds). Xoar 16x5's and again MT 3515's with CC 50s and a custom WKM mixer. The stock mixer for DJI X8 is poor with all the motors on top rotating one way and the bottoms the other. Lots of yawing issues with power on.
    I messed around with different size props on top and bottom with mixed results and only minor improvements in flight times. The way it handles is worth the 8-10% or so loss of power and you can up the prop size to counter it.

    I still have a Flat 8 that had the I2C converter tests and now another WKM in it, but the way it handles is a lot different and honestly not quite as good as X config and specially in wind which this one below is very good in.

    Its pretty easy to convert over from the standard CS8 so I am curious how many are on the fence about this and why they haven't changed over?


    [​IMG]
     
  4. Howard Dapp

    Howard Dapp Active Member

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    Good feedback Brad. I wonder why more haven't at least tried coax as well. You can't go wrong!

    BTW, I like your rat's nest..I have a nest too;)
     
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  5. Gary Haynes

    Gary Haynes Administrator
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    Is that a handle or shotgun barrel on the top front?
     
  6. Pavlos Antoniou

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    firsy of all i have 4s system and not 6s.. thats bad on x8 because of the efficiency and secondly i have hfp pro an thats why i don't try it... :)
    i want to hear some reviews about hfp an X8
     
  7. Alex Smart

    Alex Smart Member

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    Got some more testing today!
    Howard, your settings work real good on my Chop!Im at the point where its as stable in hover as the flat,still a few litle twiches sometimes.. definetly more stable in the wind and descending,I have virtually no shakes if aI take it easy! Im just getting used to the new orientation and reactions but I reckon it was definetly worth it!
     
  8. Brad McGiveron

    Brad McGiveron Active Member

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    Yes! :cool:

    well so far its only a handle and also what it hangs/hooks into in the vehicle for transport. There's one on the back as well and all loaded up its pretty heavy so it makes it easier lifting for sure.

    Actually you saw my other X config I posted earlier in this thread and its only 4s and carries the 5D3 very nicely. So really 4s should not be an issue. Like you say though maybe HFP is...
     
  9. Matt Kearney

    Matt Kearney Member

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    Hi Brad,
    Just wondering, do you run the same size and pitch props on the top and bottom?
    Do you spin your bottom motors faster?

    Starting to mess with mine now!!

    Cheers

    Matt
     
  10. Denis Gliksman

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    Hello
    Considering a Y6 for "in wind stability" and greater vertical field of view
    Any feedback on cinestar Y6 with mk and cinestar gimble ?
    thanks
    Denis
     
  11. Brad McGiveron

    Brad McGiveron Active Member

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    Hey Matt

    Ya I been messing about with a few things... same size but more pitch on bottom, different size and same pitch etc etc.

    http://www.rcgroups.com/forums/showpost.php?p=22234552&postcount=14419

    this mixer I have had the best results with and the same props.
     
  12. Matt Kearney

    Matt Kearney Member

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    Hey Brad,
    Thanks for your reply.
    Heres a question for all you gurus out there.
    Tried my second c8 in a coax setup. Normal mk setup with axi 2814-22 motors and apc 14.47 props-only carrying gimbal and cx760.
    In my normal setup it flew really well and never overheated.
    in the coax setup it flew soooo well-very stable but very high temps in the 90's celcius.

    Any ideas guys? Any suggestions appreciated.

    Sorry if it seems obvious to some of you.

    Cheers

    Matt
     
  13. Brad McGiveron

    Brad McGiveron Active Member

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    you ran this config ?


    [Info]
    Name=Octo-X
    Version=1
    [Gas]
    Motor1=64
    Motor2=64
    Motor3=64
    Motor4=64
    Motor5=71
    Motor6=71
    Motor7=71
    Motor8=71
    Motor9=0
    Motor10=0
    Motor11=0
    Motor12=0
    [Nick]
    Motor1=64
    Motor2=-64
    Motor3=64
    Motor4=-64
    Motor5=71
    Motor6=-71
    Motor7=71
    Motor8=-71
    Motor9=0
    Motor10=0
    Motor11=0
    Motor12=0
    [Roll]
    Motor1=64
    Motor2=-64
    Motor3=-64
    Motor4=64
    Motor5=71
    Motor6=-71
    Motor7=-71
    Motor8=71
    Motor9=0
    Motor10=0
    Motor11=0
    Motor12=0
    [Yaw]
    Motor1=64
    Motor2=64
    Motor3=-64
    Motor4=-64
    Motor5=-71
    Motor6=-71
    Motor7=71
    Motor8=71
    Motor9=0
    Motor10=0
    Motor11=0
    Motor12=0
     
  14. Howard Dapp

    Howard Dapp Active Member

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    Brad, which Canon lens is that?
     
  15. Matt Kearney

    Matt Kearney Member

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    No Brad, all motors were at 64 and -64. I guess that might be my issue?
     
  16. Brad McGiveron

    Brad McGiveron Active Member

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    yes use that mixer I posted :)

    [​IMG]


    Howard... its the 24mm 2.8 IS
     
  17. Matt Kearney

    Matt Kearney Member

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    Thanks Brad, is that the epic or scarlet?
     
  18. Howard Dapp

    Howard Dapp Active Member

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    Anyone have the MK mixer table for a dedeka coax???
     
  19. Brad McGiveron

    Brad McGiveron Active Member

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    Matt, that's a Scarlet.
    The give away is the battleship grey on the front there but otherwise they are pretty much the same footprint.
     
  20. Matt Kearney

    Matt Kearney Member

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    Thanks Brad,was looking at maybe getting one. Im sure 4k is enough for what we do!!
     

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