voltage problem I hope some one help me

john420

Member
I built a hex copter with wokong m v1 it weighs exactly 7 lb include 2x ( 3s 40c each 5000 mah total 10000 mah) and I set my voltage first level to no load 11.10 loaded 10.40 and second level no loaded 10.70 loaded 10 .00
but the problem is that the red start flashing after 2 or 3 min and the heli looks so weak when it is on ground it does not fly even if I move the throttle to 70 and 80and the red keep flashing i could not figure out why could the 3s not gonna be enough for this and should i go to 4s? because if it be like this then wokong does not worth a penny any help will be appreciated
 

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