NEW U7 motor tmotor

Discussion in 'Cinestar 8' started by kjetil tønnesen, Nov 22, 2013.

  1. kjetil tønnesen

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    hello i want to build a new heavylifter with long fligthtime and i wounder about the new serie from tmotor
    U7??
    anyone have some tips?:)
     
  2. Peter Gøthche

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    Hi, take a look at kopterwox facebook page. He just build a x8 with U8 motors and 28" propellers. +40 min flighttime

     
  3. kjetil tønnesen

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  4. Steve Maller

    Steve Maller UAV Grief Counselor

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  5. Gary Haynes

    Gary Haynes Administrator
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    Perfect size for a Phantom. Make it easier for it to go home. ;)
     
    Scott Strimple and Steve Maller like this.
  6. Nathan Reim

    Nathan Reim Member

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    these are great my friend dan is a dealer for tiger motor here in nc and these are awesom
     
  7. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    One of those motors, two props, who needs a frame set? ;)

    Andy.
     
  8. John Gore

    John Gore Member

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    Mine will arrive soon. :D

    Anyone else here building with U7 motors yet? Keen to share experiences and tests, etc.
     
  9. Chris Fox

    Chris Fox Active Member

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    U7 and U8 ordered in December .... Expecting some to arrive later this month ... ;)
     
  10. Dave King

    Dave King Well-Known Member

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    Chris which U7's did you order?
     
  11. Chris Fox

    Chris Fox Active Member

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    G'Day Dave,

    I went for the 490kv option and have both the 17 and 18" props to test out with them.

    I have a set of 550mm booms, but am interested to try a coax setup as well.

    Cheers

    Chris
     
  12. Dave King

    Dave King Well-Known Member

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    Thats a big boy motor. I am interested in trying a coax setup too with 16" props with the U5's.
     
  13. Chris Fox

    Chris Fox Active Member

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    Hoping to achieve good results with headroom to spare. I'm finding the predicted results from eCalc have not been as good as expected with the last build, so hopefully this time around the performance will be what I'm after.
     
  14. Michael McVay

    Michael McVay Active Member

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    I also have some 490KV U7s but have not figured out what I am going to do for motor mounts for them yet. They are so large that they do not work with the standard or heavy lift mounts from QC. In another thread, Patrick Thompson put a design out there for them, but to work in a coax set up I think we need to space out the boom clamps a little further to get access to both ends of the bolt. In addition to using metal frame clamps, I was wondering if anyone thought it was prudent to use 2 clamps on each end of the mount to make sure there is no slipping. If anyone has a source to have these cut from carbon fiber please let me know. I am anxious to try these out. Attached is the specs on thrust from Tiger for anyone who has not yet seen them.

    Thread discussing mounts:
    http://forum.freeflysystems.com/index.php?threads/cinestar-6-and-long-fligth-time.2462/page-3

    U7specs.jpg
     
  15. Chris Fox

    Chris Fox Active Member

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    G'Day Michael,

    Have you tried the carbon mounts that Gary mentioned from famous hobby, they look longer than most other mounts, and may get the press nuts out from under the motor base?

    Cheers

    Chris
     
  16. Dave King

    Dave King Well-Known Member

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  17. Michael McVay

    Michael McVay Active Member

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    Could someone who has the famous hobby motor mounts measure the distance between the insides of the press nuts? I'm trying to find out if they could be used on U7s. Thanks!
     
  18. Steve Maller

    Steve Maller UAV Grief Counselor

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    I hope this helps. :)
    IMG_8872.jpg
     
  19. Michael McVay

    Michael McVay Active Member

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    Sure does...and they are just close enough to give them a try and keep my fingers crossed.
     
  20. kjetil tønnesen

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    i have got mine u7 motors and a will buidt a coax with 17" and dji a2
    i have not started jet ,but i will:)
     

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