I tried flying the lt with a os 42 la on it but it just barely had enough power to get off the ground and go around in circles. I got a 46 la and It worked good. plenty of powa to learn the touch and go and do other stuff, eventually my luck ran out and the lt went into a dive and would not respond. post crash inspection showed the excess servo wires got wraped around the servo arms. it can happen after a good roll or to and is common to trainer type rc aircraft becuase of how they have the servos installed. look out for that or yours will suffer the same fate.