My past experience using a a dji Phantom 3 Pro, it was not a good idea. Took off once from a Ford truck tailgate and she took off like a scaled dog into the side of my neighbor's jump trampoline safety net. I was extremely blessed nothing got broken. Another time I took off with same unit from a round marble outdoor table that had iron support legs. This time the unit wanted to fly off in one direction, but I was able to throw the joy stick in the opposite direction to hold it in one place while bringing it down into some brush. So far with my dji Mini 3 Pro, I have no idea what would and or could happen since I learned my lessons well, and don't take off from any known magnetic material what-so-ever now.I have seen people taking off from the top of their cars without any issues, and others report that it's a risk to take off anywhere near a metallic structure.
I've also heard that it is okay to takeoff near metal as long as you don't calibrate the compass near the metal, so when the drone gets further from the metal it will stabilize.
But what exactly is true?
I have had a negative experience when taking off near metal, but it was with an Arducopter drone, not a DJI drone. This happened back in 2020, with an old APM 2.8 flight controller, so I don't know if this issue also affects DJI drones, but in short here's what happened: I turned on the drone while it was on the ground, a couple of meters away from a metallic structure, a tall one, I waited for GPS and took off, as soon as I ascended and went a couple of meters away, the drone started making random yaw turns, when I tried to counteract it would just fight back, so I switched to manual mode (something like Angle Mode on Betaflight, or Stabilize mode in Arducopter) even more manual than ATTI on DJIs, and safely landed the drone nearby. I was lucky I had that mapped to a switch in case of an emergency!
Could this have happened with a DJI drone too? What would be its behavior in this situation?