Results 1 to 18 of 18

Thread: Counter Rotation Props Configuration

  1. #1
    Join Date
    Jul 2010
    Location
    CA
    Posts
    370

    Default Counter Rotation Props Configuration

    I am putting together a FighterCat Cheetah and was wondering how to configure the rotation of the counter-rotating props? Should the LR prop be on the outside shaft or the inside shaft?

    We run a clockwise course at our pond if that makes a difference.
    Support US hobby suppliers

  2. #2
    Join Date
    Jul 2016
    Location
    IL
    Posts
    3,219

    Default

    My twin Cheetah runs great with inward spinning props.
    Vac-U-Tug Jr (13mph)

  3. #3
    Join Date
    Apr 2020
    Location
    CA
    Posts
    317

    Default

    Same here with my ProMarine Skater X2...port side runs clockwise, and starboard side runs counterclockwise.


    ~ More peace, love, and kindness would make the world a much better place

  4. #4
    Join Date
    Dec 2010
    Location
    NY
    Posts
    2,662

    Default

    most boats I see run the props turning to the inside they say inside for speed turning out side for handling !!1

  5. #5
    Join Date
    Apr 2020
    Location
    CA
    Posts
    317

    Default

    Quote Originally Posted by dasboata View Post
    most boats I see run the props turning to the inside they say inside for speed turning out side for handling !!1
    Chris, so you'd say 'inward' for racing, and 'outward' for SAW? Just curious, myself, as I'm also still learning.


    ~ More peace, love, and kindness would make the world a much better place

  6. #6
    Join Date
    Jul 2010
    Location
    CA
    Posts
    370

    Default

    I checked the "Big Boys" over at Mercury Racing and they run them turning inward; CW on the port side and CCW on the starboard side.
    Thanks!
    Support US hobby suppliers

  7. #7
    Join Date
    Dec 2010
    Location
    NY
    Posts
    2,662

    Default

    Quote Originally Posted by Panther6834 View Post
    Chris, so you'd say 'inward' for racing, and 'outward' for SAW? Just curious, myself, as I'm also still learning.


    ~ More peace, love, and kindness would make the world a much better place
    inside for SAW

  8. #8
    Join Date
    Apr 2020
    Location
    CA
    Posts
    317

    Default

    Quote Originally Posted by dasboata View Post
    inside for SAW
    Got ya ..so, inside for racing & SAW.


    ~ More peace, love, and kindness would make the world a much better place

  9. #9
    Join Date
    Jul 2016
    Location
    IL
    Posts
    3,219

    Default

    My experience has been it depends on both the hull and if you're after straight line stability or turning performance. What the full scale boats do doesn't really apply to us, the hydrodynamics are completely different... primarily because our props aren't scale sized.
    Last edited by fweasel; 12-27-2020 at 11:27 AM.
    Vac-U-Tug Jr (13mph)

  10. #10
    Join Date
    Oct 2020
    Location
    ZH
    Posts
    39

    Default

    On a twin you just change the leads for changing the rotation direction right?


    Verzonden vanaf mijn iPhone met Tapatalk

  11. #11
    Join Date
    Jul 2016
    Location
    IL
    Posts
    3,219

    Default

    Quote Originally Posted by ArnoudRC View Post
    On a twin you just change the leads for changing the rotation direction right?


    Verzonden vanaf mijn iPhone met Tapatalk
    No. To change the direction of a motor, you just swap any two wires, but then you MUST swap your flex cables and props to the opposite sides. If you don't swap your cables, you'll spin them in the wrong direction, causing them to unwind and potentially cause catastrophic damage.
    Vac-U-Tug Jr (13mph)

  12. #12
    Join Date
    Oct 2020
    Location
    ZH
    Posts
    39

    Default Counter Rotation Props Configuration

    Tx. I?m aware of the rotation direction for the flexshafts. They differ. For the motor direction I was curious.


    Verzonden vanaf mijn iPhone met Tapatalk

  13. #13
    Join Date
    Dec 2010
    Location
    NY
    Posts
    2,662

    Default

    Quote Originally Posted by ArnoudRC View Post
    On a twin you just change the leads for changing the rotation direction right?


    Verzonden vanaf mijn iPhone met Tapatalk
    mis leading and damaging information on this conversation

  14. #14
    Join Date
    Oct 2020
    Location
    ZH
    Posts
    39

    Default Counter Rotation Props Configuration

    Was not the intention. Following the advice to run two props inward on a rc cat, I just wanted to be sure that (with the right flexshafts and props cw/ccw) I change motor direction by swapping the leads. Am preparing myself for a twin cat for next season, that?s why I ask. Is that damaging? Sorry.


    Verzonden vanaf mijn iPhone met Tapatalk
    Last edited by ArnoudRC; 12-27-2020 at 03:06 PM.

  15. #15
    Join Date
    Jul 2010
    Location
    CA
    Posts
    370

    Default

    Assuming that you have flex shafts that are wound in opposite directions, another way to reverse the motor direction is to program the ESC rotation (CW or CCW).
    I have my motor leads color-coded to keep the same wiring configuration in case I have to remove an ESC or motor.
    Support US hobby suppliers

  16. #16
    Join Date
    Oct 2020
    Location
    ZH
    Posts
    39

    Default

    Thank you. Not sure if the stock Seakings 120 will accommodate that. Will check. Yes, I have ordered one piece flexshafts left and right for the boat (its a Zonda btw).


    Verzonden vanaf mijn iPhone met Tapatalk

  17. #17
    Join Date
    Jul 2010
    Location
    CA
    Posts
    370

    Default

    I checked my Seaking programming card and you are correct that you can NOT program the direction so you have to swap any two motor wires (and be sure to have the correct winding direction for each flex shaft).

  18. #18
    Join Date
    Oct 2020
    Location
    ZH
    Posts
    39

    Default

    No worries. Got confirmed what I thought. Will redo the coloured shrink protection after tuning. Makes it easier to change motors.!


    Verzonden vanaf mijn iPhone met Tapatalk

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •