I just installed my servos per GP instructions and Im using a Y-connector for them. When I give it input (i.e. up or down) elevator act's like ailerons, as far as one goes up and one goes down. As far as I can tell, one servo must travel opposite of the other. Is there a difference in Y-connector or a Y-harness? I thought they were the same. Anyone else run into this problem? I cannot flip the servo horn the oppisite direction, B/C that would throw the angle of the pushrod off and would not let the 2 halves of the elevator travel evenly. I'm sure it's somthing simple I'm overlooking.

There are two ways you can handle this problem. If you have a computer radio you can plug the servos in to seperate channels and mix one so it moves in the opposite direction of the other. If you don't have a computer radio or just want to use one channel you can buy a reversing "Y" . This will reverse one servo. They usually come with an adjusting pot and cost about $17.

I used the mix on my Futaba 8UAF

snyder_man

I do have a computer radio (JR 662). But have no idea on how to mix crap on it. I've never heard of a reversing y connector but I will start looking, b/c Im sure my LHS doesnt carry them.

You should definitely look into programming your JR 662 for the elevator servos. Once you figured out how to do it, you'll think it's so easy and why you'd even think about doing it any other way.

It'll be either elevon or ailevator mix. You can also do a custom mix. You've already got the tools - use it.

So in reading in my manual, I should run one servo into auxillary #1 the other into elevator. Then mix flaps to rudder until they travel equally. Also I see I have the option to have mixing ALWAYS on. That would be they way to go so a switch doesnt get flipped and crazy stuff happen, right? I wonder if my dual rates will still work the same? In doing this would this void the possibiltiy of using flapperons in the future. know, too many questions at once

Thunderhead:

If you can't figure out how to mix them on your radio. Go here:

[link]http://www.maxxprod.com/[/link]

They have servo reversers for about $19. I've used them on a few planes in the past with excellent results. Hope this helped.

Flaps to rudder??? That doesn't sound right. How does that mix afftect elevators?

I sorry, I meant mix flaps to elevator, NOT rudder. My fault[] DOH!

Thunderhead. I agree with using two channels and then mixing. I have a Futaba Super 8 Tx. so I can't help you with a JR. That said, what I would suggest is to find one of the guys at your field that does know how to mix channels on a JR Tx and then get him to help you. This is one set up you don't want to get wrong for your maiden flight. Make sure this is set up right and remember to not get too agressive with the throws. It will bite you and snap if you set too high and then yank back on the elevator. I hesitate to add this because again this is how I have mine set up for a Futaba Super 8 Tx. You should check these settings against the directions and your JR TX.

First make sure each servo horn is centered to the servo with theTx. trim set to neutral. You probably already know this. Just making sure. Then set each elevator to a neutral level setting to the horizontal stabalizer. Make sure they are both set mechanically the same. I then mixed channel 2 and 7 with 80% throw setting at the radio. Check the directions for up and down throw range mechanically to the directions, and then see if this Tx. setting accomplishes the desired throw up and down. Each elevator should move at the same speed with the same up and down throw movement. Exactly the same.

Whether or not you can mix this in your transmitter depends on the the transmitter. Some transmitters (typically entry level computer radios like the 662) don't include the trim input in user defined mixes. If that's the case, your elevator trim will only move the servo connected to the original elevator mix. Higher level transmitters will give you the option of including trim in your mixes.

A pre-defined mix like ailevator will include trim. So, if you have an ailevator mix, then you are all set. Ailevator is a mix that allows your elevators to act like ailerons as well. If you do have it, just set the aileron rate to 0.

An elevator to flap mix probably won't include trim since you wouldn't want your flap settings to change when you trim the elevator.

If you don't have the trim option in the mixes, the easist way is to use a reversing Y connector.

Solution 1 Buy Hitech digitals and ask the supplier to reprogram and reverse one servo
Solution 2 Have the pot & motor terminals reversed in one of the servos ..Have it done by the service people if not shore