I am adding flaps to a Monocoupe and the servos are situated against the root ribs the same on both sides. To make both servos move the same direction, do I have to reverse the Neg and Pos wires on one of them and leave the signal wire alone to make them both operate the same for flap use? These are JR servos. I have never used flaps before and don't know the best way to install the servos. Aileron servos move oposite from each other which is what we want. But flap servos need to move alike. Any help that some of you can provide would be a great help.
Thank you

Why not just use one servo to move both pushrods?

Another option is to buy a reversed JR servo (Many of JR's servos are available in reversed models)

Rewireing a servo is not a good idea, and in many cases it's impossible if not impractical.

Thank you Mike. I wasn't aware that JR had reversed servos. I 'll check that out. These wings are removable and have separate servos in each wing so I couldn't use a single servo. Thank you for the information.

Another option you may have available to you if you have a computer radio. Plug each flap servo into a separate channel in the receiver. You can then reverse one (without buying another servo or cutting wires). This will also allow you to fine tune the amount of travel you have for each flap servo, ensuring equal movement on each flap.

R

To find if JR has the servo you want in a reverse style, search for the servo you want, and add an "R" to the end.

Here's an example (Note the "R" on the end of the URL)

http://www.horizonhobby.com/Products...ProdID=JRPS821

And the same URL which I added an "R" to

http://www.horizonhobby.com/Products...rodID=JRPS821R

To reverse a servo you cannot just switch the external red and black wires. At best you will just have a servo that doesn't work until you switch them back, at worst you will fry something on the board. To actually reverse the servo you need to open it up and reverse the leads to the motor, as well as the outer two leads on the potentiometer. On some servos this is easy, on others it's nearly impossible due to the servos construction. Either way you have to be pretty hand with a soldering iron. Never fear there are alternatives.
Besides the computer radio, there are also reversing Y cables, where it combines the functions of a Y cable and reverses (electronically) the signal going to one of the servos. If you don't have a computer radio and can't link the two flaps to one servo, this will most likely be your best bet.