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  1. JulesTEO

    Aug 6, 2016
    Likes Received:
    First of all I'd like to introduce myself, I'm Jules from Mexico and a Typhoon H owner.

    I'm new to multirotors and the H is my very first one. (I know most people recommend to get a cheap "drone" to practice but I just couldn't resist)

    A couple of weeks ago I was about to practice (as I've been doing since I got it), everything had been going great, I've a couple of videos recorded with no problem, I've used POI, CCC, no gps flight, etc and every step had been going perfectly, however during my last flight something went wrong with the GPS (or at least that's what I've concluded)

    Unfortunately I accidentally closed the tab where I explained everything that happened in detail and lost everything, so I'm going to do a sumarized version.

    Just after taking off and holding position at low height (5m) the aircraft started floating away from my position, yawing and pitching by itself in a semi-circular path and gaining speed fast. I panicked and pushed the elevation all the way down, as I tried to lower it it went behind some trees and vehicles and when I lost visual contact I panicked again and sent it back up to prevent it from flying out of control at a person level. Once I regained visual at about 6 meters height I tried again to bring it down but it ended hitting wall at 1 meter height going 21 miles per hour (according to telemetry)

    Obviously my lack of experience had a lot to do with the escalation of the situation, any experienced pilot would've compensated for this behaviour, so the malfunction of the machine and my rookiness added up for a hard hit.

    I reviewed the flight using the FlyLogParser app on the ST16, and it shows very strange registry. It shows the aircraft in a fixed position where I took off, then it shows the H yawing and pitching but the position is still "stuck". It keeps showing a fixed position and just a couple of seconds before the crash it jumps to the actual position at the last moments before the crash. In a fraction of a second it jumps from the "stuck" position to the actual position which was about 60 meters away.

    Luckily nobody was harmed, but the H sustained some damage.

    I sent an email to yuneec informing the issue, and they told me they filed a case and were going to check the telemetry data. However 5 days later I had no response so I e-mailed them again. Their response was then:


    We are reviewing telemetry right now and will get back to you shortly. Thank you

    Customer Care Yuneec USA Inc."

    That was about 2 weeks ago, and since then I have got no other response. (and I'm starting to think I'm not getting any answers any time soon)

    Since then I got to the task of repairing the machine myself, luckily everything seems to work fine, I could retrieve all the pieces and it was fixable with minimum spending.

    Anyway as I told you I had already typed the whole story in detail and it was very frustrating that I lost it, so if anyone is interested in further detail just tell me heheh.

    Here are some pictures from the day of the crash:


    And this picture is from earlier today:


    Only pieces replaced: Gimbal mount, one landing gear.

    It's ready to go back on the sky, (I already made a test flight without the camera) however I'd appreciate more insight from Yuneec into what happened, because the last thing I want is for the same situation to happen again.

    Just wanted to share this story with you, tell me what you think about this

  2. Steve Carr

    Steve Carr Moderator
    Staff Member

    Dec 15, 2015
    Likes Received:
    Bessemer, MI
    There has been a GPS problem on a few H's and it sounds like that is the case here. At this point I would say the GPS will be unreliable and needs to go back to Yuneec for repair. Did you email Yuneec at the US facility? I suggest you send another email to rborders@yuneecusa.com and explain the situation and if possible attach the flight log file for that flight. Some people have found that by turning off the GPS in flight they were able to regain control and bring the bird back home but that only works if you have enough altitude and time to do it.
    JulesTEO and banned user like this.
  3. DroneClone

    Mar 2, 2016
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    If your main flight module/IMU/GPS are malfunctioning do to a component , it will most likely do it again ! Unless it was a electrical interference at where you flew! I would have sent it in for Yuneec to fiquire it out and fix under warranty
    I had the same uncontrollable drift from a 8 ft hover and have been flying for years. There was nothing I could do to stop the drift or land it !
    JulesTEO likes this.
  4. banned user

    Jun 13, 2016
    Likes Received:
    Agreed it probably needs a GPS replacement, I would persist until you get an RMA, you might have to pick up the phone too, I'd also ask and put a note in the box pointing out the repairs you already made and have them check those repairs and continue the warranty. Hope this gets sorted quickly!
    JulesTEO, Steve Carr and DroneClone like this.