When I fly, I take off and get high enough right away to be above any obstructions, I've had my TH fly away on me already and it came back when battery went low, my fly away happened about 1 min after take off. Then Came back unscathed. I have looked into possible reasons for this problem. And talked to yuneec customer services. They told me a large reason for fly aways is KP index being high (Google KP index for drones to get full explanation). Currently today KP index is at 6 and I have a complete over cast so I can't test it till this all clears up. I only just learned this info so I thought I'd pass it along. They told me rule of thumb to never fly when KP index sits above 4 so I'll recalibrate and charge up everything and wait for things to settle down before trying again. This time with my extreme range antennas so I can hopefully have a better control on the H if it tries to fly off.