"I really dont know how to figure if the prop is on backwards. I just followed the unboxing guide which tells that all props must have the writing facing the sky. I tested the spinning direction using CLI test/motors and they are all correct."
I bought Y6A(OLD) RTF but without battery and radio. I calibrated my radio control and I have 3S 3000Mah battery . However when I try to take off the copter flips over immediately. I tested the radio using CLI . the props writing are all facing the…