I have build quadplane - flying wing (2m, 60dm^2) + tricopter with two front tiltrotors
Total weight - 4kg
engines: SunnySky X2814 with APC 11x5,5 - max thurst 3x2330 ~7kg,
Battery - Liion 4s 6p - 18Ah - 120A max countinous,
ESC - Hobbywing 40A (max 50A).
On 20% throttle plane breaks off the ground but its hard to fly higher - like it dont react on throttle position.
What could be issue of this behavior?
Maybe 4s Li-Ion is not enught?