Welcome to YuneecPilots.com!

Sign up and join the fastest growing Yuneec drone community.

  1. chiloschista

    Joined:
    Jul 22, 2016
    Messages:
    114
    Likes Received:
    32
    Hi ensemble,



    after a very long flight, where I discharged the battery to about 13.8V I noticed the charger did charge 6300mAh. So what?

    I did a full discharge cycle then and discharged the battery at 1.5A down to 3.3V/cell.

    Guess what? I got 6449mAh!

    Ok it was a discharge at very low C rate, but anyway ...



    I checked again the label and yes, they say 5400mAh.

    So a plus point to Yuneec which delivers batteries with well matching specs and overpassing them by a good 18%



    About behaviour at about 14.3 the controller start to vibrate and shows a warning: the copter will set at max altitude of 60m.

    At about 14.1 (not sure about that), the copter will forced to land. The pilot can force it to stay up and try to bring it home, but this is very dangerous, as if the battery goes to low it will land hardly (or crash). Can be used to adjust the landing spot.



    Anyway, my philosophy is that at 14.5V is time to land and don't go under 14.4V, which still gives a good margin to manage a safe RTH and landing.



    Best regards,

    Ric
     
    Mike_Flys and Rayray like this.
  2. Rayray

    Rayray Moderator
    Staff Member

    Joined:
    Jun 3, 2016
    Messages:
    1,219
    Likes Received:
    384
    Location:
    Pine Forests of Deep East Texas
    Good post, thanks.
     
  3. David Wilson

    Joined:
    May 28, 2016
    Messages:
    286
    Likes Received:
    128
    You are correct. Some people are a little too cautious and land at 15.0 or sooner, but that cuts too deeply into my flying time. The one advantage is a quick re-charge.
     
  4. Steve Carr

    Steve Carr Moderator
    Staff Member

    Joined:
    Dec 15, 2015
    Messages:
    894
    Likes Received:
    400
    Location:
    Bessemer, MI
    I generally land at 14.7 and after shutting down the voltage rebounds to around 15.1. I do get fairly fast recharge at that voltage.
     
  5. chiloschista

    Joined:
    Jul 22, 2016
    Messages:
    114
    Likes Received:
    32
    Well I have to say that I don't push it to the limits at any cost. If the flight is done I land. Those were tests to have a safety margin knowledge, because I like to know exactly what happens and why.
    Ric
     
    Mike_Flys and Steve Carr like this.
  6. Steve Carr

    Steve Carr Moderator
    Staff Member

    Joined:
    Dec 15, 2015
    Messages:
    894
    Likes Received:
    400
    Location:
    Bessemer, MI
    Good Plan!
     
    Mike_Flys likes this.
  7. chiloschista

    Joined:
    Jul 22, 2016
    Messages:
    114
    Likes Received:
    32
    Thanks = : D
    Ah, and I mean voltage under load.