I recently experienced a crash with a 3Drobotics X8 RTF, APM 2.6 firmware 3.1.5. The drone was in the middle of an auto mission (about 10 WPs, short distance) and has started to wobble dangerously just after a gust of about 3 beaufort until it fall on the ground. No consequent damage, fortunately. I checked the dataflash logs and it appears the frame configuration was set to "Plus" instead of "X". So I have two questions;
-1) How may it possible that the frame configuration has changed from "X" to "Plus". Does the firmware update may cause such an issues? Of course, I select the configuration "X" in the mission planner interface when I perform the firmware update.
-2) How is it possible that the UAS flyes correctly (and autonomously) for half the mission if the frame configuration is incorrect?
In would appreciate any help! In advance, thanks.