Hello I am still very new to rc planes and I am building a Yak 55 from electrifly. Each<span class="Apple-style-span" style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">aileron has it's own servo my question is do I program my remote to control the second</span><span class="Apple-style-span" style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">aileron server or is there a y connection that connects two servos into one channel. I think that I program my remote, My remote is the Futaba Super9C I can get into programming it no problem and will have to learn exactyl how to set it up. If someone could let me know if I am correct or a better way to control the</span><span class="Apple-style-span" style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">ailerons that would be much appreciated.
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Thank you

While not familiar with that particular plane, most will have a simple Y-Harness that connects the 2 servos into one channel. Both servos will move the same movement when connected to the receiver. Connect the ailerons so that the pushrods are on opposite sides of the servos. This way when one aileron moves down the other one will move up, and vice versa. This is the easiest and simpliest way to connect your ailerons.

Ken</p>

You can either use a "Y" and run the ailerons off a single channel, or plug each aileron servo into its own channel (usually channel 1 and channel 6). The advantage of using separate channels is easier setup. When using a "Y" the subtrim function from your transmitter will impact both ailerons. With each aileron on a separate channel you can set the subtrim for each individually, allowing you to center each aileron independent of the other. In theory if your pushrods are setup correctly you can accomplish the same thing mechanically by screwing the clevis in or out on the rod as needed. However, this process is subject to two issues. First, you are limited to half turn adjustments of the clevis. Second, you are also limited by the splines on the servo, which must align to the servo arm mount. It is almost never the case that this will allow for exact centering of both servos, nor is it likely that both will be "off" by the exact same amount. If they are run on a single channel the subtrim will, of course, impact both of them, but if each is on its own channel each can be centered independently.

Thank you I will try the two seperate channels first as the receiver is a six channel. I like the idea of being able to control both <span style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">aileron independently.</span><div><span style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">
</span></div><div><span style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">Thank you</span></div><div><span style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">
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When making any adjustments such as those listed above you need to make sure the plane's controls surfaces are mechanically correct before starting to make adjustments with the radio such as sub-trims. I can't count the number of people I've seen get in trouble because they used the radio to make adjustments with before the plane was mechanically setup. Using the radio for making individual aileron adjustments in this case can cause problems such as differing amounts of control throw for each aileron, which can result in erratic flight behavior among other things. You should ensure that both ailerons are mechanically centered before doing any adjustments with the radio.

Being able to make adjustments such as this is a great feature of computer radios, but within the context of the Beginner's Forum we tend to not recommend it in situations like this for exactly the reason I listed above. Before making any adjustments in a radio the pilot should understand what they are adjusting and the consequences of those adjustments. If they start simply changing endpoints, centering, sub-trims, throw amounts, among other adjustments without understanding what could happen they could very easily result in a plane that is difficult or impossible to fly. This is why we recommend to not use a computer radio, or not use a computer radio's advanced functions, while they are learning to fly. The stundent needs to learn how to mechanically adjust the plane first.

Because of the above is why I recommended the Y-Harness. In cases like this K.I.S.S comes into play here. The simplest solution is usually the best, and the Y-harness is the easiest and simplist solution for beginners.

Ken</p>

RCKen is absolutely on target about setting things up correctly mechanically. The computer functions on the radio are, IMO, aids and not substitutes for inattention to details or sloppy flying skills. Functions like subtrim are a big help for fine tuning, but should not be used to compensate for inattention to getting things mechanically straight and centered as much as possible to begin with

If you want to learn about using the facilities in your 9c tx then setting up to use two seperate servos on two channels is a good place to start as it will be a common thing to do in the future.

The procedure is described in the section of the manual starting on page 44. HINT You have to select the flaperon option to start with.

Additional help here [link=http://www.futaba-rc.com/faq/faq-9c.html]CLICKY[/link]

You have to decide ahead of time with the 9C whether you want aileron differential or the flaperons option. It will matter whether you choose channel 6 or 7. If you don't plan on using either - you still have to tell the transmitter which plug the left servo is in or it will only operate the right aileron.

A "Y" in channel 1 works fine if you just want simple ailerons.

I have an older 9C and it is a great transmitter. I highly recommend Harry Higley's pamphlet: "Radio Programming the Futaba 9C" as it goes above and beyond the manual.

Well said. Iuse the sub trim to balance out the half toothoffset due to the splines on the servo shaft. Two identical servos with every thing centered will end up with a slight offset on the arm. Sub trim is great for this.Every ting else has to be mechanically balanced before the computer can do it magic without screwing things up.

Don

Thanks to everyone I am learning a lot of information. I did set up the plane last night with two channels and pulled out the manual on my 9C to program my radio. Took a few minutes but everything worked out. I still have to make my adjustments as far as my low and high rates. I did get my ailerons to center with no problems.<div>
</div><div>I will be looking into the recommended manual "<span style="font-family: arial; ">Harry Higley's pamphlet: "Radio Programming the Futaba 9C" as it sounds very interesting.</span></div>

It is a good idea when you get your 9C programed to do what you want, the make sure flipping a switch or bumping a slider doesn't effect it. Ihad a plane start going really wacky in the air one day, I barely got it down and when Idid, I noticed both ailerons were about 5 to 10 degrees up. I had setup flaperons and a slider on the right side was the flap part of the setup, but it was reversed. I kept bumping that slider as Iwas flying and adding a little more negative flaps with each bump. When I do some programing now, I go through and slide every slider, transfer every switch and turn every knob to make sure is does what I want and only what Iwant. It take time and it isn't much fun, but it takes less time and is more fun than rebuilding a crash.

Don

As I programed the remote last night, I flipped every switch, turned every nob, and moved both side sliders just to make sure they were not controlling anything. Took some time as there are so many switches, nobs and sliders that can be programmed.<div>
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I always program seperatley taking advantage of my DX7 Capabiliries to program in flaps,
Do you have a DX7?

How about a reversing Y-harness? The both servos are set exactly the same, and the harness does the reversing of one servo.

Aileron servos should not be reversed. They should both move in the same direction for proper operation.

Ken

rc ken hope you can figure this out, operator wants his radio to fly plane. what haping later. when no show on scren.

Ken: Basically you're right but could certainly confuse someone with that statement. Servo arms have to be located on opposite sides.

Yes, the servo arms should be located on opposite sides of the servos. But you want both servos moving the same direction, and that is why you don't use a reversing Y-harness

Ken

Ken, just so that I understand where you are coming from...why is it bad to use a reversing Y-harness? I have always used one in all of my planes and have never had a problem. If it can cause a problem I would really like to know, so that I can make the proper correction by switching the linkages to the correct side.

Korps,
 Technically there is nothing wrong with using a reversing Y-harness, but this is a situation where you simply don't need one. It's something that doesn't need to be purchased, and it's also one more thing that can go wrong as well. But if you want to use one there is no reason why you can't. You just have to hook up your ailerons differently. Normally you would hook them up like the diagram I posted above, with the linkages connected on opposite sides of the servos. If you are using a reversing Y-harness then you would hook them up on the same side of the servos.

Ken

Agree. There is no need (usually) to reverse ailerons. Someone messed up the control horn locations if it is the case.

You should also check the tail mounted split controls before investing in a reversing dual servo harness for the empennage servos on models so designed. I have a GP Ultimate that needed a reverser for one elevator servo, but the similar size Giant Sportster has the mounting holes offset on either side so a reverser isn't needed (after I had ordered one I find this). Oh well, I'll use it eventually.

I also really like the Smart Fly Equalizer II that will mate two servos and can optionally reverse one. It gives about 8 or 10x more precise adjustments to mate the travel. Costs $40, but can save a lot of hassle and frustration when putting two servos on a single control surface or precisely matching things like split elevators.

Unless one of the servos is reversed in the radio already. Man, that's confusing.......reversing a reversed servo with a reversing y harness! [sm=72_72.gif]

I understand what you are saying - it makes a lot of sense. Like I said...up until now I've always used a Y-harness, but I think it has more to do with a quick and lazy way out. Thanks Ken

When all is said and done, and you are ready to fly this plane, make darned sure your ailerons move in the right direction. Check this by standing behind the plane, and move the aileron stick to the right. The right aileron should move UP. If it moves down.. well, your controls are... ahemmm.... reversed. [X(]

CGr.