Ok, I'm adjusting the control throws on my Nexstar. I have a few questions regarding the wing. First, the servo on the wing seems to move about an 1/8" or so, more in one direction than the other. This is preventing me from getting the correct amount of throw on both my ailerons. How can I fix this? TX adjustment, or maybe an adjustment to the servo itself? Another question I have... In order to get the correct amount of throw on my ailerons, I needed to adjust the clevis on the aileron pushrod down. When doing this, it's closer to the wing, giving it more movement on the ailerons. But in turn, it seems the amount of play between the aileron and the servo horn has been magnified. What i'm trying to say is, i can take the aileron with my fingers and move it about a total of a 1/4" up and down. Is this going to be a big problem? If so, how can I fix it? Hope you can imagine what i'm trying to say. lol Thanks for your help!

First, is your aileron trim lever in the center? Your servo problem may also be related to your Transmitter. What Tx are you using?

As far as the aileron horn goes, are you using the outermost hole on the SERVO arm? If not, do that before you move the clevis closer to the bottom on the aileron side.

Yes, my trim is set in the center. It's the Futaba Skysport that comes with the Nexstar. Plane Jane!! And I am using the outermost hole on the servo arm. Are you suggesting a larger control horn? It's kind of a funky control arm. It's kind of shaped like a Y. This allows the ailerons to move up more than they move down.

You want the the throws to move more up than down. This is to counteract adverse yaw caused by the difference in drag between the two ailerons in a turn.

Any slop in your control surfaces can be very bad! It can lead to flutter which can cause damage in the air and loss of control which often ends in a big crunch sound of balsa meeting mother earth. First thing, identify the play you mentioned and get rid of it before flying.

Some general rules to follow:
1. With your radio and receiver on, center the trim adjustment of the aileron throw.
2. Unscrew the conrol arm from the servo, remove it and re-attach it so it is centered with each arm as close to 90 degrees to the side of the servo as possible. Now turn off the receiver then the radio. This should leave the servo in the centered position without haveing to leave your radio on.
3. Line up each aileron with the center of the wing. Tape them in position with masking tape if necessary.
4. Check the mounting locations of the control horns on the ailerons. They should both be the same distance from the hinge line.
5. Make both linkages as close to the same length as possible - this will help make sure both ailerons move the same amount.
6. Re-read the instruction manual that came with the plane and make sure any specifics haven't been missed.

Had the same problem with a Student's Nexstar that I was instructing. Turned out that one aileron was not moving freely because of shotty construction. To check for this possible problem, remove the clevis from each aileron to see that both move freely. You really cannot trust the construction quality in any ARF (or RTF).

Ok, i've uploaded a couple short videos showing my problem with the aileron movement. Hopefully with all of the great RC modeling knowledge from you guys I can correct this problem. Please let me know what ya think. The videos are about 2.5mb a piece, so not to big.

http://webpages.charter.net/skyjump/aileron%20play.mpg

http://webpages.charter.net/skyjump/...rod%20play.mpg

oh my god! that is just horrendous! i am thinking that maybe the wood around the control wire in the aileron is messed up or broke or whatever.. i dont know what else it could be but you cannot fly with those doing that, you will only have a 2 min flight. or a really long one when it flies away. get someone around you at the field to check that thing out..

Well... I've seen worse... but not much worse.

You aren't goig to like this...

You need to cut the ailerons free, and find out if the slop is the torque rod wigglinginside the aileron or in the bearing tube inside the center part of the wing. Either way... it has to be fixed. (and you just can't do it without pulling the ailerons off.... at least not without a high chance of gluing the torque rods in place..)

Hopefully its wiggling inside the aileron... Its easier to fix. (usually that is where you get the type play seen.)

Assuming its in the aileron... you take brass tube that slip fits ontothe torque rod, and cut to length 1/8 inch longer than what will slip onto the torque rod.. Solder a plug into one end of the tube Coat the torque rod with vaseline or similar grease. mix up some epoxy.. drip it into the oversize hole. put the brass tube onto the torque rod and then push the aileron in place. Yse a screwdriver ot knife to prevent the tub from pulling out... and pull the aileron back off. Clean the torque rod with alcohol, being careful not to force any epoxy into the bearing in the wing.

When the epoxy cures... the brass tube will be firmly in place.... and the torque rod will slide right in.

Now its time to rehinge th aileron onto the wing... Be careful when wiggling the aileron to get the hinges in place... you can break the torque rod bearing out of the wing.

You probably initiated the play when putting the hinges in (or was it factory hinged?)... and then in-flight flutter made it worse and worse. 2 or 3 more flights and you'd lose an aileron.

Actually the plane is brand new. I haven't even had it outside. Sounds to me like something Hobbico should fix. It's an ARF, and it says that the plane is gauranteed to be free of flaws in the workmanship. They need to send me a new wing. And fast!! Flying season is soon approaching!! FHHuber, thanks a lot for the info. I'm not thinking I should have any problem getting a new wing from Hobbico. Hopefully!! Anyone had any experience returning aircraft parts to the manufatuer? Think they'll cover shipping? Thanks again ppl.

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ALRIGHT HOBBICO!! Called them up, told them what the problem I was having. They are sending me a new wing and I should expect it within a week. Now that's service.

Hobbico (Great Planes and Tower... same group) are usually good about stuff like this. ESPECIALLY when its one of thier products sold through Tower.

My bet... they told you keep the wing... If they did... you can still fix it and thus have a spare.

The guy at Hobbico told me they usually want to have the item shipped to them so they can check it out. But he said the wings pretty cheap, he would just send me a new one. He never said anything about mailing the old wing back. So hopefully I can keep it. Thanks for your help.