gnixon2015
lvl.4
United States
Offline
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kudos indeed, ill defn be looking into doing these things if/when i open mine up (and after ordering a spirit level). great read.
one thing ill add to this overall, and this is in terms of diagnosing actual drift from perceived drift (so that some people dont mess with IMU inadvertently). from what ive read, you can defn make things worse messing wtih IMU so make sure you do have an imbalance before tinkering.
when flying in wind (Even light wind like say 5-6mph), i can confirm that the phantom disengages GPS hold when doing nothing but yawing (that was referenced in this thread and a few others) but ive watched it drift from the wind while yawing, and then when i stop, it returns to the old gps position. this proves that it knew you only spun and it just never compared the current to target gps coords WHILE you were yawing. then, when i put it in a situation with NO wind AT ALL, it spun with no drift.
i believe this is because while you are actively flying (sticks not at neutral) it is disengaged (like putting a clutch in) the GPS hold until you let up. also, i think, while you are pressing, it is never recalc'ing or re-evaluating the gps coords if ONLY yaw is being pressed. it seems when i press roll or pitch it knows that would be lateral movement so it keeps 'updating' my gps location, but when yawing, i think it seems to ignore that (because, well, it makes sense that yawing and nothing else, you'd not be changing location). probably not a bad thing since if it were trying to fight wind and stay in position while i was also yawing, i could see stability potential there (maybe not just thinking it through, ohterwise, why make it do that).
now this certainly doesnt mean that anyone's is likely that versus real yaw drift, but evaluate it in low wind conditions as i think my perceived yaw drift is only happening in moderate wind situations so I think it is best i leave it alone for now.
but when it comes time, and im sure it will, this thread will be a total life saver. |
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