Well, this is sort of a cheap way to make both elevator and ailerons called elevons.. elevator-ailerons. Cheap in that it uses two servos instead of three or four.

Some, if not most, flying wings use this principal, where they use two servos, one on each wing, controlling the aileron for banks and at the same time, the same control surface as elevators for climb and descent. If you notice the arrangement with the bellcrank in between the servo and the aileron, it will pull the aileron down at the same time as it pulls the elevator down. This acts to bank the plane if you move the aileron to the opposite side. (aileron, if looking at it from the back, right stick moves the right aileron UP which banks the plane to the right, right wing down, and vice versa for the left side).

With the elevator, pulling on the elevator stick moves the elevator UP to cause the nose to move up, rear to move down.

Now combine these together, using mixing in the transmitter and you will get the same operation, but at the same time but with different stick movement.

Does that help? I hope I didn't confuse you as much as I confused myself when writing it..

CGr.

ps.. where in RI? I was born in Pawtucket, raised in Seekonk, now live in Galloway, NJ.