Can someone please explain to me the correct way to program the DX7 for dual servo ailerons, so that each servo travels the same amount in each direction??

Right now, the servo that moves down travels farther than the one that moves up. The servo that moves the up aileron stops while there is still stick throw on the tx, but the one that moves down seems to travel throughout the full throw of the stick.

Thanks.

Steve

There are several steps to follow before you can get the setup correct and ready to fly. First of all, if your ailerons are moving correctly, that is, one goes up as the other goes down, then you are moving in the right direction.

Next, if you move the stick to teh right and the right aileron goes up, then your setup is ok for direction.

Now, you go back to the beginning and make sure servos and linkage are set up correctly.

Start by disconnecting the servo linkage from the servo arms and center the servos.

To do this, move your aileron stick on the TX as well as the trim, to the zero position. in the center for both. On the DX7, this is easy to do because you have a visual indication where the trim is and you can move the trim adjustment till the indication is centered.

You may have to replace your servo arms with one that has all four arms intact (unless you didn't cut the arms off of the one you were using). You have to find the servo arm that will be perpendicular to the long side of the servo. Just remove the screw on the top of the servo, pull it off, and rotate it 90 degrees and push it back on. One of them will be perpendicular to the side of the servo...... repeat as necesssary. When you find the right one, push it on and replace the screw.. screw it in tightly.

Now, you can adjust the linkage. The ailerons must start off being perfectly centered on the wing, on both sides. I do this by using two pieces of 1/8 ply about 2 inches by 8 or so inches. The size is just a rough size, it doesn't have to be perfect. You will need a couple of small clamps to clamp the pieces of wood on the top and bottom of the wing (carefully so you don't crush anything. Do this so that the clamped wood extends over the aileron but don't clamp down the aileron. You want the wood to act as a centering device to hold the aileron on center to the wing.

Next, attach the linkage to one side (servo or the aileron horn) and then adjust the other side until it slips easily into a hole on either the servo arm or the control horn. Repeat this on the other side USING THE SAME HOLES as you did on the opposite side.

Secure the arm and remove the clamps.

Move the sticks. Your ailerons should now move together (in opposite directions of course) and equal amounts.

CGr.

Go to pg 39 in your DX7 manual you will need to activate the flaperon feature. It will require two channels to program dual ailerons without the use of a Y cord. You will be using the aileron channel and the AUX 1 channel to do so. see pages 40 & 41. Once setup you can adjust and fine tune the control surface throws by using travel adjust see page 50 of the manual.

CG and Steve,

Thanks for the tips. Looking into them both.

Steve

Make sure that you perform the mechanical adjustment, then the adjustments on the transmitter to fine tune. This will give you the best results..

Thanks guys. Did a data reset, re bind, re centered all servos, subtrimmed, and now all seems good. Still not sure what happened, but seems okay now.

Thanks again.

Steve