Yaw errors on P3S?

[jlgaustin]

Wanted to go on a quick flight tonight, everything normal. Satellite count wasn't as high as I would like but enough to fly. I have also flown from this location several other times with no issues. I got about 75ft up and 135ft away. All the sudden I get Compass error and forced switched to Atti mode. Thank god I still had VLOS and not a lot of wind. I was able to bring it back in ATTI mode and land safely. I powered down and restarted everything, flew it back up and had no issues. This is first time after about 30 flights I have had any issues. Here is logs. Anyone tell me possibly what happened here? Really worries me now, if I fly off far enough to not be able to get it back in ATTI mode.

Phantom Log Viewer - PhantomHelp.com

TIA,
Jason

 

[msinger]

Did you calibrate the compass and/or take near any metallic metal objects? It looks like there is a large wall near the takeoff point and/or a concrete pad with rebar in it.

 

[jlgaustin]

Did you calibrate the compass and/or take near any metallic metal objects? It looks like there is a large wall near the takeoff point and/or a concrete pad with rebar in it.

I did not calibrate compass here. There is a stone wall that is my backyard fence and a pool deck which is concrete where I took off from. I assume this probably isn't a great spot to take off from?

 

[msinger]

If the concrete has metal inside of it, you should not calibrate the compass and/or take off within about 10 feet of it.

 

[jlgaustin]

Ok thanks.. I am pretty sure it's full of rebar, so probably not a good idea. Is it ok to take off on a street, asphalt? I don't think those have much in the way of metal under them. Also on compass calibration, I thought it was only wise to calibrate in an area such as a nice open field, and if your launching somewhere your not sure about don't do the compass calibration, because calibrating could end up worse than not? Is that correct?

 

[msinger]

Is it ok to take off on a street, asphalt? I don't think those have much in the way of metal under them.

That should be fine. Most asphalt should be free of metal.

I thought it was only wise to calibrate in an area such as a nice open field

You should be fine to calibrate in any location where your Phantom is 10+ feet away from all magnetic metal objects. See more details in the compass calibration guide.