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DeveloperPermalink Reply by jasonshort on July 13, 2012 at 8:53am

Do you have heavy vibration on the frame?

It's very misleading to look at that graph. It's sampled at 5-10 hz and the noise you're seeing is at hundred of hz. You'll be getting heavily aliased results. 

Have you flown much before? many new flyers flip on takeoff because they don't pop out of the ground effects fast enough. 

Be sure you can fly by doing a hand test. If that works, disarm, arm again and fly. Get it to two feet off the ground asap. don't linger with the throttle on the ground.

Fly over grass.

Jason

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Permalink Reply by srinath mallikarjunan on July 13, 2012 at 9:53am

After the flipping incident, i disconnected the lipo, reconnected it and looked at the mission planner.

The quad was stationary on the ground, but the display in the HUD was all over the place. Pitch roll and yaw were randomly moving everywhere.Disconnecting and reconnecting the lipo again didn't improve the situation. 

So there was no frame vibration at all, because the copter was disarmed and rock solid on the ground. Ground effect could be a possibility, but this erratic behavior on the HUD started appearing even after the props stopped spinning.

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