ORIGINAL: olstoney
So what are you advising me, or maybe I'm misunderstanding or getting confused? I need 75oz of torque on all the flight surfaces with the exception of the rudder. The rudder is suggested to be 120oz.
Any servo that will develop the power required will suffice, obviously some will work better than others. I would use the digitals if I had to purchase new servos.
Not to mention being quite expensive, wouldn't the coreless be kinda overkill and what would the problem be using the 6635HB's on the ailerons?"
I don't think the coreless servos are overkill personally. I like the precision, speed and repeatable results afforded the modeler. Are they really needed, probably not? It’s all a matter of what your used to I suspect. The Karbonite gear train has been known to fail on surfaces that are demanding in single servo applications. A large aileron on a 3D model is a known problem IMO. You may have good luck with this setup and then again you may not. We have input both good and bad in simialr sceanrios, there are simply to many variables for us to turn cheek and suggest it will work without issue. I'm advising against using the HB's for ailerons on this model.
I thought the 5600 series was overkill until the Karbonite digitals were mentioned at the LHS. I would certainly hope that even 3 pole digitals would center better than analogs or am I mistaken. Maybe I'm just thinking into this too much, am I?
The 5600 series and the 6600 series servos are essentially the same servo less the gear trains. Yes, as I mentioned ANY digital is better than its analog counterpart! Notice I mentioned "counterpart", coreless against coreless or cored verses cored. However a 3-pole digital may not center as well as a coreless analog servo. It’s unknown to me to be honest. One of the things you have to consider when making this comparison is the coreless motor will infinitely stop at any desired location whereas a three or five pole motor can only stop between the poles. The digital amp will attempt to obey commanded or signaled position about 300 times more per second than an analog amplifier, so in theory they should be better regardless. Alas like all things there are caveats you gotta give a little to get a little.
See my previous post for recommendations for servos you have on hand. I would go there for the time being and later if you feel the need replace the servos and or the model and move up...