KDE 5215 435kv Coax MK Octo

Discussion in 'Cinestar 8' started by Ryan McMaster, Feb 15, 2015.

  1. Cam Batten

    Cam Batten Member

    Joined:
    Jun 10, 2013
    Messages:
    103
    Likes Received:
    4
    Yep they look pretty nice, also checked out Hyundai iLoads, Mercedes Vito and Renault Trafic. Should start a Van / fit out thread, be really interested in what people are running
     
  2. Dave King

    Dave King Well-Known Member

    Joined:
    Dec 24, 2012
    Messages:
    2,711
    Likes Received:
    311
    Wow! Holy smokes! 120 amps at hover? Your flight times are going to be in the toilet. With Tiger 4120 motors at 12K I am hovering around 88 amps. Hover is 60% with flat 8 with Tiger 16's. I can get 15 to 15.5 minutes at 12K.
     
  3. Steve Maller

    Steve Maller UAV Grief Counselor

    Joined:
    Oct 30, 2012
    Messages:
    3,979
    Likes Received:
    807
    What weights are you guys running? At 22-23lbs AUW my X8 hovers at about 62 amps.
     
  4. Ozkan Erden

    Ozkan Erden Distributor

    Joined:
    Aug 3, 2012
    Messages:
    678
    Likes Received:
    131
    Yes, 5215XF-435KV motors are not efficient. They are (just) very powerful.
     
  5. Ryan McMaster

    Ryan McMaster Active Member

    Joined:
    Mar 8, 2014
    Messages:
    289
    Likes Received:
    40
    My Herk based rig is going to be for an experiment/idea another pilot and I have in mind. Probably going to run the 5215 435's

    I am building a rig similar to what Dave flies, ~30lbs AWU dual FC etc.

    Got all my motors yesterday.

    SO far the 4014's and the 4120's both rock. I have one dud tiger though=/ the 5215 330 KV is off to Germany.
     
  6. Cam Batten

    Cam Batten Member

    Joined:
    Jun 10, 2013
    Messages:
    103
    Likes Received:
    4
    Yep this wasn't built for efficiency, it was built to lift heavy things
     
    Howard Dapp likes this.
  7. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
  8. Ryan McMaster

    Ryan McMaster Active Member

    Joined:
    Mar 8, 2014
    Messages:
    289
    Likes Received:
    40
    Howard,

    I want to get a confirm back from Germany that they are safe on the BL3.0. So Far on my test jig they are on 18's but I don't have any 20+ props in my kit. I want to try to stay on the Dual FC system to mitigate loss potential.

    That being said My Herk ESC's come in Friday and your idea has me thinking 330's with 20/22"s would be a pretty good combo. Gonna order a pair of each up and test em out next week. I would hazard around 2400-2700~ grams per motor on 22x7" props and no more then 12a.
     
    Howard Dapp likes this.
  9. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
    Great! Keep us posted...I really do hope to see good results with the 330kv on a larger prop!
     
  10. Ryan McMaster

    Ryan McMaster Active Member

    Joined:
    Mar 8, 2014
    Messages:
    289
    Likes Received:
    40
    Planning on doing some 8s testing too with a KDE 75a ESC as well just for curiosity.

    Howard I get a feeling that the 330's will do very well on 6s with a large prop on the MK or Herk electronics due to the built in breaking the ESC's provide. I think my estimates are conservative but only time will tell. Got some 20's and 22s coming and a friend has a 24x8 Xoar he is letting me use.
     
    Howard Dapp likes this.
  11. Bo Tornvig

    Bo Tornvig Member

    Joined:
    Oct 14, 2012
    Messages:
    160
    Likes Received:
    14
    Hi,
    Here is a short footage of my brand new Herk setup with 18" Mejzlik props and 5215 435 kv. I still have some vibration issues to fix. I'm used to the black rings on my flat 8 - but even with the blue ones I'm seeing some nasty micro vibrations sneaking in to the camera... Maybe I'll try the 18" Xoar props... What kind of props do you swing?

     
    Howard Dapp likes this.
  12. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
    Bo, what is the AUW of your rig in the video? Flight time and battery capacity?
     
  13. Bo Tornvig

    Bo Tornvig Member

    Joined:
    Oct 14, 2012
    Messages:
    160
    Likes Received:
    14
    About 10 - 11 kg. My final AUW will be 14-15 kg. I get about 8 min. with 2X9000.
     
  14. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
    Ryan, have tou recieved your Xoars for testing the 330s?
     
  15. Ryan McMaster

    Ryan McMaster Active Member

    Joined:
    Mar 8, 2014
    Messages:
    289
    Likes Received:
    40
    Yes, but I am in the middle of a project at the moment. I should have time this weekend.
     
    Howard Dapp likes this.
  16. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,366
    Likes Received:
    1,162

    Which Xoars are you ending up testing with Bo, please? The 24x8?

    Thanks
    Andy
     
  17. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
    Where did you order your xoar 20" and 22"?
     
  18. Bo Tornvig

    Bo Tornvig Member

    Joined:
    Oct 14, 2012
    Messages:
    160
    Likes Received:
    14
    I didn't order the Xoars. The micro vibrations turned out be generated, mostly from the Prop wash. So I ended up with a boom extension to 500. That helped a lot, but I still struggling with some weird camera problems I'm not seeing on my flat 8. I think that 550 would be better, but then it wont fit in my car anymore :eek: I guess some PID tuning will help a little. I'm used to the black rings on the flat 8, no way I can use them on the X8. Currently 8 blue vibe dampers do the job. (48 rings)
    Maybe there is to much flex in the Cinestar hub...?
     
  19. Michael McVay

    Michael McVay Active Member

    Joined:
    Dec 31, 2012
    Messages:
    416
    Likes Received:
    91
    Howard: If you are looking for a decent place to order Xoar props, here is where I have ordered my last couple sets:

    http://www.justmodelprops.com

    They stock quite a variety of different lengths and pitches - and can custom drill the holes to match your shaft size so you don't have to use inserts or change adapters on your motors.
     
  20. Howard Dapp

    Howard Dapp Active Member

    Joined:
    Aug 18, 2012
    Messages:
    977
    Likes Received:
    111
    Thanks Michael. I buy from them as well, I contacted them last week but they don't carry the larger diameter (20"+) matched pairs. They could order but since the Chinese are just returning from their holiday it may take up to a month before I have them.
     

Share This Page