Just curious if anyone is using Karbonite geared servos on the ailerons for their Ultimate. I'd like to use them since they are a little cheaper than the 5945 servo. Plus, I don't need 360 oz.in. of torque on each wing.

Man oh man after all the warnings about karbonite on Giant planes do you really want to risk it? Stay with MG. I crash landed a CAP232 120 after losing aileron servos to flutter. They were the karbonites. Don't do it Ben, I wouldn't.

P.S. the CAP is the one in my Avatar. Luckily I got a new wing and fixed 'er up again. Flies great w/ 5645's all around.

I used some Hitec 475's on a 120 CAP. It was the H9 120 CAP in the Matt Chapman scheme, but that thing was too heavy so it didn't last long enough for the gears to wear out. I had maybe 12 flights on it and was trying to land with a cross wind. I hit the right wing on a fence post because I couldn't get it to slow down enough and so I was trying to keep it from blowing into the pilot area. After that, I looked into things like wing area and weight.

I used some Hitec 6635s on ailerons in early testing and they worked fine. However I quit using them whin I broke the gears testing a bigger plane.

I do not like the twisty nature of the output shaft, it does not hold the surface as securely as I would like.

TF

This might be a little under kill but would 4 HT 5245 mini digitals work on those ailerons? I think they are 72 ounces at 6 volts and they are MG. I used 4 on a 27% Edge (two per aileron) and they worked really really well. I think they can be bought for around $40 each on sale somewhere, maybe Servo city.

The only problem is that I would have to modify the servo mounts so they would fit. I may look into some other brands to see what they have to offer before I drop money on 5945's for ailerons.

I had karbonite gears and I thought they were just the coolest thing until a mechanic for rc racing cars said I would be wise to check them because they can't take any kind of a shock. He wouldn't even use them. When I got home I checked the servos in my plane and 2 of them already had a tooth missing around the center point and a 3rd servo felt like it was getting ready to pop another tooth. The response I got from Hitec was very disapointing. These servos had never been abused and had very little flight time on them. I stopped using Hitec and only buy Futaba the JR 8411a.

I did some searching and found the Futaba 3050. They have metal gears and everything. But, they aren't programmable. So, i'm either going to get those and use a matchbox or just get an analog MG servo and use some kind of matchbox. But a matchbox is $70 and I need two, so looks like i'm buying 5945's.

Ben, many people are selling these used for around $50-$60 shipped. Check it out (if you want to do the used route that is).

What ever works for you Ben. Of course if you want to program a servo you will have to buy a programer. As for myself I haven't had the need to program any servo. I've been happy enough to do everything through the radio using the end points and subtrim etc. If I were ganging servos together I might have some use for programming the servos. Then again I am far from being a "pro". I have used the Futaba 3050 and I think they are a decent servo for the money. They are a little sloppy but I haven't had any problems with them. When I got them from the Hobby Store I deal with they also gave me a much better deal ($$) than the online stores. The same goes for the JR Servos.

Well, I know a couple people that have the programmer. I think i'm going to go with the used servo route because I can get them for around $65/servo. Don's hobbies has them for $70/servo now, but I don't have the money to spend on them unless my OS 160 sells. I had one guy interested, but people think that me asking $250 for something slightly used and that brand new costs close to $450 is obscene.

If you use 2 "Ys" and adjust your linkage you dont need a matchbox. Mine has 5945s at the speed the thing rotates Im happy with that. Hitec does not recommend karbonite on any gassers. Mini servos are for mini planes. Open one up the small gears metal or whatever are not designed for 28% or even 60 size. I had this discussion over a giant Stik with a friend who used them anyway and after 3 flights they were stripped.
Servo City has 5945s for $71 right now 5645 for $43 this wek only

yeah, may just have to bite the bullet, but i'm just going to use a Y with the Hitec route. The matchbox was to adjust the futaba servos.

I agree with AndyT. With careful adjustment I see no real reason to go with the programer. Of course I would use the Futaba or the Jr instead of the Hitec. I don't think any money is saved by going to Hitec. Once again that is my personnel preferance through bad expierince. I always felt that their advertising on the Karbonite Gears was misleading because they just don't hold up. I have also tested Hitec from end point to end point against Jr and Futaba and found them to be slower in my expeiriments.
If you are worried about getting the ailerons to be exactly on the money through a programmer I would think that if you just used a "Y" connecter and got them as close as possible you probably couldn't tell the differance. I know on my old Ultimate (rest in peace) and my GP Pitts I have one servo for each aileron using mechanical linkage for the second aileron and they fly just fine. The ailerons did not move exactly the same distance. Lots of Luck Which Ever Road You Choose......Bill

Smart Fly has the 2-D equalizer for $29.95 I think. I would use them with the MG non-programmable servo before I would waste my time using a "Y". AND the 2-D and 3-D equalizers are cheaper than a JR matchbox or a Futaba SMA-10.



Bobby

Ben,
check out servocity. They have a sale going on right now for 20% off all hitec servos. you can pick up the 625mg for $32 and the 5625mg digitals for $45. www.servocity.com

I'm going to look around. I'll probably try the 625's with a smartfly equalizer. Does anyone if the Hitec 625's are sloppy? If they are, i'm just going with Hitec 5945's. The price of the smart fly 2 servo matching system is about $37.50 each if I buy two of them and the Futaba 3050's are about $50 each. Might as well get the Hitec's and borrow a friends' programmer.

The 625 will have much poorer centering than the 59 series. Its a 3 pole motor versus a Coreless design, chalk and cheese really. The 56 series is a 5 pole motor, better but still not a coreless. When you check pricing you will find that most coreless servos are higher but hte centering all round is better....just a design fact not a flaw in the non coreless.
The other thing that I found out is that the Corless Hitecs use much less current at idle 250mah v 500mah, Jr 8611 are around 250mah also.

Yeah, i'm just going to put 5945's on the ailerons and use a programmer. It's a better set up and more of what I want.

I stand corrected from an ealier posting. I said I have Jr 8411's when in fact they are 8611a's. Bill

I used a 5475 for a choke servo on a gasser. Choke stopped working and found out the servo output spline snapped clean off at the case. The servo arm stayed screwed to the spline. Unforunatley it was no longer connected to the servo. They're junk.

It's not fair to say that they are junk, the problem is they were designed for some other job. That's like saying that a small car is junk because it was crushed when an elephant sat on it. IT wasn't designed for that job.

TF

I said I would never spend the money on JR8611a servos until I/others had problems with the Hitec. When I saw a Wild Hare 35% Extra go in with the new Hitec aileron servos locked up, I decided to change
I "bit the bullet" on the first set and have spent this past year collecting them whenever I could. I love them!! They are running on a 6 volt system and I don't get my fingers in there way
I have gradually sold off my Hitec servos on RC Universe and used that money until all I use now are the JR8611a servo. They are noticably different and I'm far from the best pilot in the world. Just my 2 cents.

My Extra was just on the "Edge" of disaster when I was put wise. I agree with you. Bill

I don't remember it saying anywhere on the case not to use in a gas engined airplane. At least when I got them they didn't,don't know if they do now. If so then thats a different story. I didn't think using them as a choke servo would be a problem, I was wrong.