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Can the P3P/A land with just 3 motors spinning?

Discussion in 'Pro/Adv Discussion' started by nickyb, Oct 5, 2015.

  1. nickyb

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    Just curious if the P3 can land with just 3 motors working, the other say not working at all or maybe the prop broken?

    I know Octo copters have this facility, but just wanted to find out if pilots have experienced a motor failure mid flight.

    Cheers
     
  2. msinger

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    Nope. It'll drop like a rock.
     
    bobmyers and nickyb like this.
  3. bbfpv

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    Well, technically it will land. Just not the way it was designed, or the way you want it to.
     
  4. nickyb

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    Thanks....just curious
     
  5. wali

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  6. Nstrong48

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    I had a prop fly off before on a P3S and the Phantom immediately flipped and flew into the ground
     
  7. PilotHarry

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  8. Mako79

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    They should really consider implementing that algorithm for prop loss recovery.
    But as many say, DJI probably prefers phantoms to crash to make more money...
     
  9. Chris Vedeler

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    I had a motor completely separate from my P3 mid hover. It not only crashed, the spinning accelerated as it came down. I think it was trying to compensate for the rotation, but without the 4th rotor the other motors just keep making it worse.
     
  10. N017RW

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    With two motors spinning in one direction and only one spinning in the other direction, the quad began to spin in the opposite direction of the two motors' direction.

    It's a simple unequal torque issue and the quad had no way to correct for this imbalance and maintain altitude.
     
  11. THG Aviation

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    Could it decend on just two opposite motors or can it only fly or descend on all 4?
     
  12. johnp44

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    I suspect it would tumble in the direction of the two dead motors, just not as fast as it would with three motors. Would someone please give it a try and get back to us?
     
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  13. N017RW

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    It's comes down to balance and thrust.

    Is there enough thrust from two motors to reduce the descent speed to a survivable level?
    Not expecting that to be true with the current P3 design/components.

    Is it sufficiently balanced to maintain stability? No.
    Then you have air currents and other factors beyond just the hardware.