"I have seen this problem two times, once it was due to to much vibrations, second time was due to cold solder joint. Do you use bullet connectors between esc and motors or esc and battery?"
"Today it is so easy to create content hence the internet is full of text, images and videos. I guess people ask you because they want a condensed summary (read: list) of what parts went into your build, instead of trying to distill the…"
"Hm, so I had a successfull first flight with my apm2.5, mtk v2 gps and rctimer 450 clone kit today. I have added some pics of my setup since I think I get rather good compassmoot values (22%). I have also added my .log file since I have trouble…"
"Heh, I am also looking at helicopters in addition to my quadcopter and tricopter.
I have been recommended the Align 450 plus dfc as a good beginner heli. The owner of http://www.rchelicopterfun.com/ seem to recommend this copter too.
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"@Weerts : http://code.google.com/p/arducopter/wiki/ExternalMag . That cut (step 2) is needed to use the compass on the new gps+combo board w. apm2.5. The GPS should to my understanding work without modifications.
@Francis : I don't see it beeing…"
"@Joshua I know I read the datasheet, could have put an extra avrtiny on the gps+compass unit and configured it as an i2c slave (: ... perhaps little more work, not much though."
"@joshua yes I meant that sda line cut. Stink that the mag can't be configured to use a new address instead.
@justin thx for clear answer. Will order one of these as soon as they stock (:, hope my shaky hands are able to perform the surgery on apm."
"Find it peculiar that 3drobotics homepage states the old apm2.5 is not compatible with the new GPS + compass combo. Especially since a feature of the apm2.5 is the ability to disable the onboard compass for an external."