Re: Video: Fitted my Phantom v1 into a Phantom 2 shell (easy
Firstly PJA can I say what an epic video that was... the music especially made that a real enteraining (yet nervous) watch! You got a good bounce off that ground.... maybe moreso than my sign post!! :lol:
Personally I think calibrating in your location WAS the issue. Experiance has taught me that it can do more harm that good. To explain:
The compass dance only really needs doing if you travel significant distances in geography (enough to move magnetic north from where it was trained to be in the compasses memory during the last 'dance'). The risk of doing the dance every flight is the possibility of invisible magnetic interference at your specific location. The best policy for calibration IMO is to get yourself out locally into a big wide, wifi free zone with no metal or high voltage cabling around (or under) you. Then do the dance (and a test flight to see if its stabel). After that you are set for flying anywhere in say a 100 mile radious.
What likely happened to you is the compass calibration got magnetic interference with all the lighting poles, underground cables and all other crazy unseen crap in an area like that. This is just a theory of course but my one proper flyaway happened in a location I'd flown from several times without incident (next to a large metal building on a road with high voltage wires). Then I forgot to flip the GPS up (it was a 450) and powered on which messed the compass and required a recalibration to be done on site.... which i did. Net result was a very short flight with it eventually powering down hard into the ground by itself but feeling a lot like yours did in the short time it was up. This was a v2 NAZA and WITH a Futaba T8J.
Since then I have dared to test that same location (without 'dancing' on site) and it has been fine ever since.
The compass, when it calibrates, creates a mod value as a reference point, stores it, and the NAZA then works from it during flight to calculate where it is going. Doing the dance makes it re-work this reference point and if it is in location with magnetic interference that is where it references the wrong magnetic north and it is then basically like rotating your GPS around the wrong way. The fact it flew home sort of confirms that as the home location isn't based on the way it is facing, just the GPS co-ordinates it took off from (and it doesn't need to know where north is to work that out).
Anyway lets hope you have better luck with the P1.5 (looking forward to seeing this vid)
Firstly PJA can I say what an epic video that was... the music especially made that a real enteraining (yet nervous) watch! You got a good bounce off that ground.... maybe moreso than my sign post!! :lol:
Personally I think calibrating in your location WAS the issue. Experiance has taught me that it can do more harm that good. To explain:
The compass dance only really needs doing if you travel significant distances in geography (enough to move magnetic north from where it was trained to be in the compasses memory during the last 'dance'). The risk of doing the dance every flight is the possibility of invisible magnetic interference at your specific location. The best policy for calibration IMO is to get yourself out locally into a big wide, wifi free zone with no metal or high voltage cabling around (or under) you. Then do the dance (and a test flight to see if its stabel). After that you are set for flying anywhere in say a 100 mile radious.
What likely happened to you is the compass calibration got magnetic interference with all the lighting poles, underground cables and all other crazy unseen crap in an area like that. This is just a theory of course but my one proper flyaway happened in a location I'd flown from several times without incident (next to a large metal building on a road with high voltage wires). Then I forgot to flip the GPS up (it was a 450) and powered on which messed the compass and required a recalibration to be done on site.... which i did. Net result was a very short flight with it eventually powering down hard into the ground by itself but feeling a lot like yours did in the short time it was up. This was a v2 NAZA and WITH a Futaba T8J.
Since then I have dared to test that same location (without 'dancing' on site) and it has been fine ever since.
The compass, when it calibrates, creates a mod value as a reference point, stores it, and the NAZA then works from it during flight to calculate where it is going. Doing the dance makes it re-work this reference point and if it is in location with magnetic interference that is where it references the wrong magnetic north and it is then basically like rotating your GPS around the wrong way. The fact it flew home sort of confirms that as the home location isn't based on the way it is facing, just the GPS co-ordinates it took off from (and it doesn't need to know where north is to work that out).
Anyway lets hope you have better luck with the P1.5 (looking forward to seeing this vid)
