Hi, we are three engineering students who are using the Erle quad copter with Erle brain 3 for a project. When we try to take of using Qground controll, the drone shoots of in to the air and doesnt stop, even though the take off height is set to 3 meters. We have calibrated everything but it wont take off correctly. To prevent the drone from falling down we have used the RC to take over and land, but today the RC wouldnt take over and the drone fell straight down and crashed. We really want to fix this issue so please help us.