Help to choose new heavy lifter

Discussion in 'Cinestar 8' started by Michael Braun, Jan 16, 2014.

  1. Zubeyir Mentese

    Zubeyir Mentese New Member

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    Cheers to your maiden flight! What kind of ESCs and power distribution board are you using? Are those the 420 or 490 kV U7s?
     
  2. Brad McGiveron

    Brad McGiveron Active Member

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    I disagree that 3515-400's with 11kg is too much. I had more then a year and a half with them on two machines both carrying Epic and trimmings. Now with U's its really a non issue, but you could easily run 3515's with that weight without problems.
    I did and would pick U7's now but back in their time the 3515-400's worked wonderfully.
     
  3. ebad mohammadpoor

    ebad mohammadpoor New Member

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    hi i have an cinestar 8 with mt3520 400kv t motor cf15 and 60a tmotor esc also running wkm my booms are 500 can i have 12kg totall weight with the above combo?
     
  4. Dave King

    Dave King Well-Known Member

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    Ebad

    Using a typical elevation of 2500 feet above sea level and 1 10000mah battery I'm calculating 68% throttle at hover with 15X5.4 Tiger props. If you went with bigger booms you could run 16X5.4 props and be able to reduce the hover throttle of 58%. Your actual location where you fly in respect to elevation can have a big effect on these numbers though so they might not be accurate. Where do you fly?
     
  5. ebad mohammadpoor

    ebad mohammadpoor New Member

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    hi im in tehran iran
     
  6. Dave King

    Dave King Well-Known Member

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    Your DA is pretty wide in Tehran from 3600 to 6200. I don't think the motors are big enough.
     
  7. Graydon Tranquilla

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    I am trying to find the postings on the analysis of a Cinestar 8 c/w Tiger U5 motors.......here..... on Freefly Forums.... can someone point me towards the right postings....... there are so many to dig thru...... search tools are helping somewhat... but still looking..... not sure of the AUW but the design is for a 2 axis BGC system carrying a GH3 or GH4 I think.
     
  8. Chris Fox

    Chris Fox Active Member

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    G'Day Graydon, have a look at Dave's build thread, he has settled on U5 with 16" props.
    Cheers
    Chris
     
  9. Dave King

    Dave King Well-Known Member

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    I have documented my U5 build pretty good here
    http://forum.freeflysystems.com/index.php?threads/my-new-mk-heavy-lift-copter-project.3091/
     
    Graydon Tranquilla likes this.
  10. Graydon Tranquilla

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    Excellent.... Thanks Dave....... I will study thru this material......
     

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