hi guys just design F15 60% of steve design , i fly it once but after that when i fix the aileron because plan was turning left itself, then it never fly, pls see video and let me know what’s wrong with it , it seems to be its tail heavy but why it fly once? And i added weight on nose still same.. or i am giving lot of Throttle??

F14 60% Steve Design (0 min 29 sec)