srbell
Member
I built a large quad with a WKm expressively for mapping and ended up with a flip of death machine. It's using a NEX5n, 6135 330 motors and two 8ah6s packs. Originally I tested without the camera and mounted the batteries under the frame and added the simulated weight of the camera as well. Flew amazing for 40min flying grids at 8m/s. Took the ballast off, mounted the camera on the bottom and mounted the batteries on the top of the frame. Nothing else changed except the cog setting in the assistant. Four flips, amazingly no damage except for some scratches on the propellers. COG is correct, motors and props are correct. The COG is about 1" below the propellers so it's not really top heavy. Is there a limit to how close your COG can get to the propeller plane? BTW, I've swapped out the flight controller, IMU and the GPS all with the same result. I found the speed controls were glitching on startup, so I've swapped them for different models and will retest tomorrow. Any thoughts?