Hi guys, I just bought a ominus today (used, but they said it was in "perfect" condition). First, I charged the battery and then I went outside to fly it. When I turned it on, I took like 5 minutes to calibrate so i could fly it- that was not the only problem. The main prob. is 2 of the motors make this horrible grinding sound 
and it wont stop until I stop giving it power. I know this is not normal, but do you have an idea on how to fix it? Also, how long does the battery last and how long to charge? Thank you so much!
and it wont stop until I stop giving it power. I know this is not normal, but do you have an idea on how to fix it? Also, how long does the battery last and how long to charge? Thank you so much!