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Landing assistant error

Discussion in 'Inspire 1 Help' started by m00se, Apr 1, 2015.

  1. m00se

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    To keep a long story short,

    I was flying over some short grass, I would estimate less than 3cm, dry grass, in about 10ms of wind,
    when I hit land, from about 5m, the inspire plunged downward too quickly, I didnt react thinking that at 2.5m it would get a sonar value and slow down,

    big mistake, it just kept going and did a very hard landing, nothing damaged thankfully and the camera wasnt onboard.

    I then made a test, and above the grass the sonar doesnt pick up until 1.7m whereas indoors it works at up to 2.5m

    I guess that we need to be careful how and where we activate the landing function?
     
  2. The Editor

    The Editor Moderator
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    Or,be sensible and not use the auto land or auto takeoff function at all.
    It is a gimmick best avoided.
     
  3. m00se

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    Hahahaha , that what i thought at first, then I tried it twice and it was perfect, the thrid flight was the dodgy one
    I made two further flights after this one with the camera onboard and didnt dare risk it so I landed manually, which in 10ms wind was suprisingly easy to do.
     
  4. The Editor

    The Editor Moderator
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    Yup, the Inspire is incredibly stable, even when landing and in ground effect. Very easy to land and take off. I have never tried the auto feature and doubt I ever will. But that's just me :p
     
  5. m00se

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    I highly suspect that the angles motors blast a lot of the air to the sides and greatly reduce the downwash and ground effect. Also , the barometer used for alt hold is fooled a little by the downwash of the motors, and therefore the drones normally go a bit crazy, I think the sonar is helping eliminate that also .

    I was very impressed with the Inspire one, I have only flown it on two days so far, but it is very stable, especially with the arms up. I have been flying multirotors professionally for 5 years, and out of the box I dont think I have seen a more stable platform.
     
  6. DJeff1

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    The I1 is so easy to land why even use auto-land?
     
  7. huppe

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    Never used auto -landing or take -off.Agreed to all posters who are saying this is just a gimmick.
    Have done very low altitude flying,but I always go up to about 2,5 mtr(10 feet) and start the landing from there.
     
  8. m1ch1gan

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    The sensors can have a little difficulty with surfaces like grass and not be able to interpret the distance of the aircraft to the ground as well as hard surfaces.

    That said, I tried the auto take-off once and it did not go well. It tipped over, instead of taking off. I have seen the auto-land feature work very well on a hard surface with my friend's Inspire. I do prefer to control the decent myself at this point in time, though.
     
  9. Daniel Mascheck

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    We have had early sonar units in tractors. If you are in a crop and it is windy and the crop like wheat or even grass is constantly moving in the wind it will go crazy!