^ read 20 hours about those quad-copters for a friend of mine. he was completely helpless.
"Can u get it to work?" he asked "of course i said."
well well well, thing got set up software-wise, then done gyro calibration. still all graphs looked ok. saved.
THEN: gyro z axis drift to vry high extend.
put is one the table, powered for 10 minutes and gyro zeroes again.DA FUDGE
thing didn't fly nowhere. reason was chinese copy of flight controller unit purchased from ebay ....
malfunctions, malfunctions, malfunctions.
but now i know everything about these little quad-copters. awesome flight characteristics, you can trim the hell out of these, and if they fly do it like a charm!