Rotors up or down?

Discussion in 'General Discussions' started by Alex El Caballo, Nov 27, 2016.

  1. Alex El Caballo

    Alex El Caballo Active Member

    Joined:
    Nov 16, 2016
    Messages:
    33
    Likes Received:
    6
    Location:
    Miami, Fl.
    Hey fellas,
    While i wait longingly for my Mavic i look at magazines and read incessantly forums and UAV stuff...
    So here is a question...
    What is the benefit of having rotors mounted top as most drones have as in compared to some out there that have the motors and props facing down?
     
  2. Kilrah

    Kilrah Well-Known Member

    Joined:
    Nov 12, 2016
    Messages:
    261
    Likes Received:
    53
    Ground clearance/less risk for dirt to damage the props?

    Beyond that it basically doesn't matter. Those who put them down do it to "be different".
     
  3. The Editor

    The Editor Well-Known Member

    Joined:
    Oct 12, 2016
    Messages:
    399
    Likes Received:
    198
    Aside from the things mentioned above, mounting motors below the arms means that thrust washers become pretty redundant since the thrust pushes the shaft upwards and this puts the stress on the upper bearing.
    Additionally, you can loose a small percentage of efficiency due to air mass blowing over the arm on top mounted motors.
    Bottom mounted motors also alter COG and can make an aircraft slightly less stable.
     
    #3 The Editor, Nov 27, 2016
    Last edited: Nov 27, 2016
  4. Mako79

    Mako79 Well-Known Member

    Joined:
    Oct 13, 2016
    Messages:
    180
    Likes Received:
    76
    They point them down to make the drone more water resistant. There are some drones that can be flown in light rain.
     
Loading...
Similar Threads - Rotors down Forum Date
Downtown Columbus, Ohio Photos and Videos Thursday at 10:26 AM
Casey Neistat and Team Hired By CNN - Beam To Shut Down Off Topic Nov 28, 2016
Camera Continues to Rotate Up/Down After I Stop Wheel Mavic Pro Help Nov 22, 2016
Silence the lamb - Mavic RC teardown Photos and Videos Nov 19, 2016
"Not the Greatest" Mavic Teardown General Discussions Nov 15, 2016

Share This Page