I got a Ultra Stik .60 and I need another servo for the ailerons. I bought a JR 7202 and it came with 4 DS821 servos but I need 5 for this plane. Should I stick with the DS821 for the ailerons are would you change them out and put something with more power? Any info would be greatly appreciated.

Thanks, Mike

Basic servos should be fine.

Do what you have to do but keep both aileron servo's the same (assuming it uses two servo's). Standard servo's are fine, just keep them both the same.

You could use a non-digital on the throttle.

Madrigger the DS821 is more than enough servo to do all the surfaces on a .60 sized stick.

like CGretired and Bruce said, make sure that both aileron servos are the same brand and model
and you don't need an 821 on the throttle. alot of experienced and competition pilots use a smaller
servo like the hitec HS81 on the throttle as it doesn't need alot of torque to operate.

Yes, I was sure that I needed to use the same on both sides, but can you use a Hitec Servo with a JR Receiver. I'm guessing they are all compatible with each other right?

Thanks, Mike

you should be able to use hitec with JR, but i may be wrong, i'm a Futaba guy

Actually, you can use a Hitec with any brand of RX. The only mfg. servo plug that won't go into another mfg's RX is Futabas. Futaba's plug has a tab on the side that stops that male plug from going into any other mfg's receivers.

And there is a very good Hitec servo that is actually a very good choice for aileron servos where the application asks for standard power servos. The HS225BB is sort of a well kept secret for a number of uses.

Your standard servo....... let's take an example of one.......
The Futaba S3001 is a standard ball bearing servo that is about $20.
It weighs 1.6 oz puts out 44oz-in in .23sec.

The Hitec HS225BB is ball bearing and is about $22.
It weights 0.9oz and puts out 56oz-in in .14sec

The use of HS225s out in the wing saves you over one ounce overall. And it's extra good to have less weight outboard to boot.
Plus the sucker is actually stronger than most standard servos, and as quick as most. And obviously quicker than some of the old standbys.
And it's a mini in size. Not a biggie about the size but all three other parameters are winners. Big winners.

I usually use three of them in every 46 to 60 size airplane. They're also in a couple of 90size and don't break a sweat.

And their plug goes into any mfg's receivers.

But shhhhhh......... don't let the secret out.

Rock I firmly agree with you on the servo size for the plane he is using. But I was thinking if he has 4 DS 821
sport digitals with 60+ at 4.8 volts, why not use them on all control surfaces and go with a lightweight mini on the
throttle. This will give the added advantage of good centering and resolution, combined with good torque.
and the Hitec HS81 will cost less than $20.

Decent plan but..........

I always figure that there is going to be a next airplane to come. And those DS821s are excellent high torque digitals. Which means they're really good for an elevator which is almost always a heavily used servo and heavily loaded one as well. And since aileron loads are easily handled by one servo, then any two servo setup really doesn't benefit from having even a regular strength, so why not.............. save two DS821s for the next airplane and save an ounce of weight overall and have excellent centering and resolution and more than enough torque with 225s. But I was looking at perfecting this and the next airplane. Not keeping the cost as low as possible. Which is never a bad idea.

Having that much torque out in the wings on ailerons is way overkill. But if you already got 'em why not use 'em. Other than once they're there they probably will stay there until the airplane is crashed. And the next airplane might come about before that happens.

Using the HS81 is an excellent idea before even considering the low price of that servo. Saving weight is always a positive.

You can snip the tab off of the Futaba connectors, and then they will fit into any other brand of receiver.

Another thing to watch between servo brands is that some of them are reversed from the others. This is not a important if you are matching brands where you need to match servos, or if you are installing them in your plane for the first time, but if you ever replace a servo with another brand of servo, you may have to reverse that channel (and retrim it). I replaced a standard Airtronics servo with a standard Futaba servo, and had to reverse the channel on my TX afterwards.

See attached diagram for wiring of different brand servos.

Ken

But don't slip doing it.
Or you can simply buy servos that don't have to be modified to use.

But if you've already got 'em, razorknife and go. But go carefully with the knife. Too much and the connector on that side could be a bit of bother to plug in as it'd have nothing supporting it to the side.

Thank you'll for all the replies. I really appreciate all you guys! You'll make this much easier for the new guys and save us some money so we do it right the first time. I haven't gotten to fly yet. I bought an Alpha .60 and the trainer took it up and crashed and burned after running for about 3 minutes. The battery for the receiver failed. When I pulled it out the sugarcane field I found that the battery was completely dead. I charged it and put it on the load tested and it dropped real fast. We think the battery had a bad cell. I was really dissapointed. They told me that it was part of the game. That was a brand new battery that came with my JR 7202. I went out and bought me a very good battery and I had won this ultra stik .60 so I decided what the heck lets try this one. So again thank you very much, and I am sure you will get more questions from me.

Thanks, Mike

BTW, I usually limit the number of digital servos I have in a model. I like to be able to fly a lot with a single model but don't put overly large batteries in them. So I like to have my airplanes use less percentage of capacity on a single flight than my TX burns. And I've found that if all the servos are digitals, the overall consumption averages more a flight than the TX uses. And I have seen no need for digitals for ailerons. But like them for elevator. And see no need for them on the throttle.

But that's just my way to get 'er done.

Mr. RC Ken fix that diagram please was going to print it off but it is to distorted. M>R your sure right about the help on here. Mr Ken is great as is so many of the guys. I also thank them for there insight. And so many good questions are asked also. Such as yourn here.

what's wrong with the diagram???? did you click on it to enlarge it??

Ken

Diagram is fine, just printed a copy of the enlarged version. I did use a Laser Jet instead of an Ink Jet if that makes a difference.