3.5kg-cm is about 50-60oz-in...but these servos are like the 7000's in that they run at high power to maintain position.....They are better on the consumption than the 7000's and the 4000's...but they still are digital like.

50ozs is plenty. and thats 4.8V go to 6V pack and get even more power if you are concerned about it...

I used these things on 120 sized birds with 140's in them....Like the Dr. Jeckyll II, my Ariel and even a Typhoon 2+2....They are a great servo...as I said before the biggest downside is they use lots of juice. In fact the super servos use more than todays digitals....that was big improvement on the digitals they reduced power consumption.

I would not hesitate to use those servos. They are good I never had any failures with them....I ran mine on 7005 gears to reduce slop as the 7100's are metal gears and get sloppier quicker.


Good Luck

Troy Newman