If you add it all up (all the above posts), for the average flyer, those that fly trainers, sport planes, most averge level warbirds, and some low to mid level aerobatic aircraft, the standard ball-bearing medium torque servo.. in other words, your standard $29.99 servo (and that may be a high estimate meaning that you most likely can find a good deal on good servos for less cost) will most likely be just fine.

Spending a hundred bucks per servo for a standard sport aircraft is a total waste of both money and servo capabilities.

As Baracuda said.. if you have a high end aerobatic aircraft, expensive 3D, helicopter, or any other that really needs the precision of a digital servo, those that use them realize that they need the extra battery so they are aware of what the digital servo can do and what it needs to operate properly.

A few years back, I spent about $70.00 per servo for high torque coreless servos with steel gears. These were not digital. They were fast and powerful, and did the job very well. But, later, I found out that I didn't need that expensive servo. I put them on the ailerons, one one each side.. was a waste. I removed them and put on good ball bearing medium torque servos, and that plane flew just as well as with the expensive servos. Those coreless servos are still in the box waiting for an appropriate aircraft. Oh, these particular servos were larger than the other I had.. they were the same length and width, but were a bit deeper, so they can be a problem in the wing with the real thin profile.

Servo selection comes down to what we need for the job we want them to do. 3D, pattern, helicopters, large scale, gas powered planes, may all need digitals for the energy they provide. Our average flyer will not need that expense and can get along very nicely with a good standard ball bearing servo.



CGr.