Would it work and make it better?? Cowlings?

Discussion in 'Cinestar 8' started by Tom Wadsworth, May 30, 2013.

  1. Tom Wadsworth

    Tom Wadsworth New Member

    Joined:
    Apr 10, 2013
    Messages:
    26
    Likes Received:
    7
    Heres a Photo

    [​IMG]

    So would it be better or make it worse?
     
  2. Steve Maller

    Steve Maller UAV Grief Counselor

    Joined:
    Oct 30, 2012
    Messages:
    3,979
    Likes Received:
    807
    It has promise, but I'd be mostly concerned about the clearance between the props and the shrouds. If there was the slightest movement and the props contacted the shrouds, it could be disastrous in the air. It looks really tight here. Might have to go with slightly smaller props to insure that wouldn't happen. I don't see how you could insure structural stability with the way these are attached.
     
  3. Tom Wadsworth

    Tom Wadsworth New Member

    Joined:
    Apr 10, 2013
    Messages:
    26
    Likes Received:
    7
    Yeah agree its only a concept and a superimposed photo but just wanted to get a feel from people as to the reason why people don't or why they think it should be done, pro's and con's etc.
     
    Steve Maller likes this.
  4. Steve Maller

    Steve Maller UAV Grief Counselor

    Joined:
    Oct 30, 2012
    Messages:
    3,979
    Likes Received:
    807
    this might be very interesting with a coaxial Cinestar. I wonder if that might produce unwanted side effects, or if it might even provide smoother airflow with the two props spinning in opposition? You could also get a little economy of scale with one larger shroud versus two smaller ones. i'm intrigued. i wish i had a 3D printer! :cool:
     
  5. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,369
    Likes Received:
    1,162
    You're almost on your way to creating a ducted fan motor -- which, as I understand it, does offer some increase in efficiency for higher RPM. See http://en.wikipedia.org/wiki/Ducted_fan

    Andy.
     
  6. Sebastian Meredith

    Sebastian Meredith Active Member

    Joined:
    Sep 30, 2012
    Messages:
    257
    Likes Received:
    41
    Coud be a nice plug and play add-on when required ... Close encounter flying amongst the trees, tight spaces near walls ... I would imagine it buffering itself if you brushed up against a wall. Weight might be an issue for general flying conditions, but well worth packing it in the box of extras! Nice one Tom.
     
  7. Sebastian Meredith

    Sebastian Meredith Active Member

    Joined:
    Sep 30, 2012
    Messages:
    257
    Likes Received:
    41
    You could cage each one top and bottom for those who persist in flying over crowds ...
     
  8. Tim Joy

    Tim Joy Active Member

    Joined:
    Aug 2, 2012
    Messages:
    405
    Likes Received:
    72
    There's a good thread on rcgroups about shrouded motors, but it seemed like it wasn't a great option and the idea was abandoned.
    My CS8 barely fits in the car as-is, and that would definitely be too big.
     

Share This Page