Well over 200 mph? mine was clocked at this speed and the servos are good enough to the task. I also dont use aluminum horns, just du-bro giant horns and steel 4-40 rods without CF... still happy and alive here!

as a aditional information, I didn't use a voltage regulator.... just a 5 cell batt. If your regulator turns the voltage down to 5.1 Volts, you will have a substantial less torque in those servos compared to a raw 6 Volts... perhaps this is part of your problem.



Best regards, Enrique