That's what I thought you meant but wanted to be sure. Ok, let's see what we can cover. First of all, many people today think that the only way to have a good flying plane is to use dual aileron servos, but that's not always true. In fact, several of the best flying planes that I've flown use only one aileron servo. Those would be the Great Planes Ultra Sport (40 and 60) (probably one of the best flying planes ever made), Great Planes Ultimate 40, and many of the 60 sized Kaos planes. In the past when servos were expensive they used a single servo to save money, but that doesn't mean that it's not effective. IMHO this would boil down to "If it ain't broke don't fix it". What I mean that in these cases where the planes were designed to fly on a single servo there really isn't much need to change it.

So why would you want to have dual aileron servos? Several thoughts jump to mind. In precision aerobatic planes it helps because the control throws from dual servos are crisper and quicker. Shorter pushrods from servo to control horns allows for less flex. Also, a blown or malfunctioning servo won't kill the plane because there is another servo on the other wing. So yes dual aileron servos do add performance to a plane, but as I said above not all planes need dual servos.

Ok, hooking up dual servos. A lot of people think that they need two channels for servos and in most cases this would be incorrect. A lot of people want to try to run flaperons to try to get slower landings. IMHO flaperons are about the biggest waste, and can be dangerous as well. A lot of times when flaperons are deployed the plane become more prone to tip stalls, and on a landing that usually spells a crashed plane. So if just running plain ailerons with dual servos you only need one channel on your radio, simply use a Y-harness to hook up both servos to the one channel.

Now keep in mind that all of these recommendations are geared towards those that are getting started in the hobby, or are on their 2nd or 3rd plane. For more advanced pilots a lot of this might now apply.

Does this answer you questions??

Ken