9151 Digital Servos
 

Bax:
I just made the plunge to digital servo's for a 1/3 scale Extra with a 100cc motor. I purchased 8 (gulp) 9151 servos. I picked these servos because of the 120oz rating. I was surprised when I got them that they were all plastic geared. Did I make a mistake buying these servos for a 25lb airplane? Paticularly when it comes to the rudder with a dual set-up? I going back over the servo list, the only metal digital servo for general airplane use has a much smaller rating, somewhere I beleive in the 90oz range. Question #2, why can't you use 6 volts on your digital servos.
Your comments would be appreciated.
Paul EAgon

9151 Digital Servos
 

Metal gears in digital servos tend to wear faster because the servos are always moving. The plastic gears will have some 'give' where the metal gears don't.

Futaba has designed the electronics in your servos to operate on the 4-cell NiCd pack. Some of the digital servos will operate on 6V, but they are usually R/C car servos, dual-purpose servos for aircraft and cars.