I just got my quad ready for initial flight testing today - everything works good at first, it's pretty solid, even with less than perfect weather conditions. However, after a few minutes of flying, it will flip over and crash upside down. (I didn't have it more than 3-6 feet up, so any flip would result in upside down crash.)
I am wondering if anyone has any suggestions?
Mode was "stabilize."
One thought - I noticed one of my ESCs is getting pretty hot even when the quad is not flying, just from the BEC functions I guess. (I have 4 linear ESCs tied together.) I am wondering if perhaps that ESC overheats and shuts down, causing a loss of power to one motor - and the quad to flip. The one thing about it is - after it's upside down in the dirt and I have reduced the throttle to zero, the motors are still trying to spin for a bit. If the BEC failed - could it cause a partial reset (while another BEC took over, or that one reset) resulting in this crash, and a few seconds to require the signal and detect zero throttle?
Next, I was wondering if it might be my radio tweaking out. I have a 2.4ghz FASST system, and a 900mhz 3DR telemetry radio. Think they may conflict? One thing, if I arm my ESCs, hold down the quad, and turn off the radio, the quad will "freak out." I would think a FASST system should not do that. Reminds me of the old 27mhz stuff.
Any other ideas/suggestions?