ORIGINAL: dick Hanson
For those who are actually going to use the 8611 or similar servos.
The performance of these is seriously influenced by the power available to them.
It is a MUST, to have a battery setup which will not "droop" when the servos are operating under flight loads.
Use a 6 V high amperage potential, set of batteries - multiple power inputs, power distributors, dual switches, etc., which are designed to transport the current needed for these servos.
There is a BIG difference in performance .
Just adding the high performance servo is of little or no added performance value.
Dick has pointed out the one thing everyone tends to overlook. I have done alot of static testing with servos under load testing current draw and voltage losses when I built my power buss and you would be amazed at how much less current a given servo will draw and how much cooler the servo will be when it actually receives full voltage when under load. battery choice and the # and type of connections in the system play a major roll in robbing voltage before it gets to the servo. Alot of planes have servos in them that have far more "rated" torque than the planes would actually need. However you have to remember that the "rated" #'s are based on tests done with no extensions and the servo actually receiving "full" voltage. In actual use these super strong servos sometimes come up short because they are being choked to death.