Help: Quad flips forward on launch

Posted by Artem Goncharuk on April 27, 2015 at 4:39pm

Hi all,

I have troubles with my first build - the quad flips forward

Here're the build details:

Pixhawk clone (HobbyKing)

DYS Quanum 3508 700kv motors

Steadidrone Dash frame

SkyWalker Quattro 25A 4 in 1 ESC

12x3.8 SF props.

4S lipo

I have done the following:

- Checked prop orientation, motor rotation, numbering as per - http://copter.ardupilot.com/wiki/initial-setup/motor-setup/

Video of the setup and motor test - did a test from MissionPlanner.

https://www.youtube.com/watch?v=I0Zb-8jJgcQ

- Re-calibrated the ESCs (all-at-one - http://copter.ardupilot.com/wiki/initial-setup/esc-motor/#all_at_once_calibration)

- Checked whether the landing gear is catching grass - moved to a grass-free grounds

I'm at a loss, what could be causing the issue and would greatly appreciate any hints

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Tags: flip, issue, pixhawk, problem
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Replies

  • Sam Worthington June 7, 2016 at 12:46pm

    I'm having the same trouble. A couple of days ago my Pixhawk quad flew fine. Now, it pitches forward on take-off. All I have done is removed and re-charged the battery. If I take-off in Stabalise mode then it's fine. Anything else and it pitches forward as soon as I increase the throttle. If I add a bit of nose-up pitch to compensate there is no change.

    The link mentioned above don't work and I'm using a Turnigy radio so I gues option 3 is out anyway.

    Does anyone have any ideas?

    Sam

This reply was deleted.