I have DiyDrones Hexacopter with 850kv motors.
Currently running with 3s 5000mAh & 10x4.5 plastic prop.
Hovering at 50% Joystick.
Max flight time is 8 min with 8m/s horizontal speed.
Payload without batt = 400g
50m above sea level.
What should i do to achieve 20min + flight time in 8 m/s horizontal speed.
2x 4cell 6000mah?