Hey guys does the slop a JR 8711 gets after some use cause any flutter issues, of elevators that are full surface throw? Most people like to use this servo because JR are good quality and high torque at 6 volts and I completely agree with that my jet has them. That being said all my 8711s over the years all develop some slop due to metal gear wear, while my servos that use the titanium or karbonite gears do not. I thought about getting away from the metal gears(8711) and maybe looking into other brands like Savox.
I like Hitec so that is one options but I am always trying new things to see if there is some better option around. I really don't have a brand i must use other than my Radio, I love my Futaba 14mz, but I do not run futaba servos due to the price and what you get for that price.
I am mainly talking 300 oz and up torque for the larger 30-50 pound jets so if anyone has done this and had success I would like to hear some pros and cons.
Thanks

Honestly, even an 8711 after 500 fligts will be stronger and truer than anything from hitec or Savox. Don't let the teh slop fool you; it is needed because of the incredible tight centering tolerances of the JR servos. You will never feel that in flight. You will feel a servo that hunts for center or doesn't center well all day long.

No issues with the high end hitec servos... and no slop

So when the servo is centered and your flying full throttle and the elevator can flap 1/4 or more from the slop there is no chance of flutter?
A little play at the servo can end up a lot at the control surface due to servo arm length. It just seems that over time center play like this can cause even more wear even with the surface stream lined in the air. I do under stand that once you move the stick and the servo starts to move its not a issue, but this isnt when flutter normally occurs is it?
Not saying your wrong just trying to make sure I am understanding things right.

Your thoughts on flutter are dead on, it will most often occur when the surface is at center and not being "used" per say.

I would say the 1/4 inch of flapping is something in your linkage or setup, it is not in the servo. Even when they are worn out you won't see movement like that. Something else is wrong. To ge this much movement on a surface I would need to rotate my servo close to 5 - 7 degrees. You will see a slight amount of movement at the trailing edge but it should be minimal. For example on a KingCat elevator which is close to 3.5 inches wide, I have about .050" of movement after 1150 flights with 8611A's in place. They were rebuilt when the model was repainted about 200 flights ago with new gear sets, but that is all. The difference noticed was nothing from before I had them rebuilt to when they were rebuilt.

Show me apicture of what you have and maybe we can find an answer to your situation.

I was just wondering, I think the next jet I build I will go with hi end Hitecs just see, my current jet has a mix. I will just keep an eye on these and see how much it develops, right now they are brand new.

hite 7955 all the way

they r programable too( reverse/ end points / speed/ dead band /etc)

my 2c

Yeah I have thos in this jet and thats what I had in my 100cc very good servos no slop. I am really keeping my eye on the new HV ones, my hope with futabas new 18 channel is they finally come up with a receiver that you can run 7.4 with. I have stayed away from HV due to the regulators needed so will be interesting to see what comes in the next years.
I used to like the programming feature but now with 14 channels and soon to be 18 I will never need a programmers.

It really doesn't matter with jets. The overwhelming number of jets I see use JR servos, but that's because JR has developed a following with the jet community. You're not going to experience flutter with a 8711. When flying IMAC/3D too and my JR servos do develop slop after hundreds of flights, but they are used much more per flight than in a jet. Go with what ever you are comfortable with.

HiTec user, no slop, no issues, lots of applications.

Bean, listen to what Redman is telling you. He's been around the block a few times and is also an expert pilot. Look for the slop in your linkage. 8711s don't have slop at all. The resolution of those servos is very high.

Savox are good servos too, Ive had great luck with them. I pretty much exclusively run Jrs and savox with a few hitecs in my jets

I've been around the block, and hitec has some pretty good gear trains, but their servo's are junk in performance IRT JR or (I must sin) Futaba servo's. Every JR digital servo i've ever had, has had issues going back to a consistent centering position. This has ranged from the 5245MG's to the 7955Tg's. I'm saying this in response to them being installed in pattern planes and other precision aerobats and jets. And i say it is the servo's b/c once i replaced the hitec servo's with either a high-end JR or futaba servo's the centering and trimming problems went away with only replacing the servo's.

I know people are going to say "i've had great luck with hitec servo's". I'm not saying you aren't, i'm just expressing my experiences with them. The higher end hitec's available now are much better than the ones i have used in the past, but I still notice centering problems when going from 3D style flying to a precision style flying after the servo's get a good work-out. I don't notice this with the JR 8711's or others of similar performance specs.

I am Andy but I can show you JR 8711s with slop from the plane I just took one out of, my buddy bill has seen the same thing. They do develop some slop and his linkage had no slop and my servo with just the arm on it has it. I'm not saying JR servos are not good just wondering about others that are not metal gear is all

I have 14 8711 servos with slop. All out of a 40% Extra. This is common amongst IMAC/3D flyers. I have well over 200 flights with my old SM Viper with no slop in the 8711s. Slop with JR is not an issue with jets. Also have a Ultra Flash with 8411 with 100 flights and no slop. I use Hitec 7955 in my SM f-4 and Hitec 7950s in my old FB F-16, again with no issues. We're talking about scale jets here, not ultra precision airplanes, so the brand of servo doesn't matter.

Okay cool deal

BVM F-16 /dynamax edf. Hitec on the elevators. And left with some $$ in the pocket.

Steve

One day I ask Rob Lynch AKA (Gold Finger) to fly my jet. during the flight he ask me are you using HITEC Servo? I say yes, I ask him how did you know it was hitec. He explain the jet is hunting. What does that mean (In my mind). I then replace the servo with (JR 8411 at the time)I then realizing what hunting it.what a difference.

Lol and hence forth the servo wars begin.. Again.

Exactly. I have done the same thing with guys.

I used to offer a deal to guys in my club years ago.

I told them I would give them (4) 8411 servos if they would put them in their model and fly them. Then all I asked is for them to be truly honest and tell me if the model was now trimable and could fly the entire length of the field with no input, no hunting, etc.. If they did this and agred there was a difference they had to pay for the servos. If they did and thought there was no difference I would take them to dinner and they had to give the servos back. I never took anyone to dinner!

The average guy would tell me he could not tell the difference until he had them in his model. My comparison was if you had to drive a Chevy Capri through a slalom course to the grocery store and then a Chevy Z06 Vette could they tell the difference or did they have to be Mario Andretti to tell. Most would agree they would be able to feel the difference. End result is the other serovs are great servos. They work very well and don't fail. Absolutely nothing wrong with that. If you wish to step up in performance, you routinely have to pay more and get what you pay for. Some things in life are the same regardless of the situation.

Fenderbean, like I said show me the pictures of your setup. If you have that kind of slop there is a geometery issue or slop in the clevis pins etc. I would be happy to look and help. If not, no biggy. Just trying to help out a fellow new jet pilot.

I am also new to jets and am using the 8711's in my hornet , I wet thru 6 new 8711's til I found 2 that was acceptable for my elevetors , I sent one of the worst ones back cause of excessive play . The slop was in the shaft not the gear train , I have absolutely no slop in linkage , I proved that some of the servos have more play than the others. The slop in the one I sent back was over 1/4 inch at rear of the stab . That's just my experience with them . I will definately use them in my jet anyway . Bill

what do you mean "slop in the shaft"? Are you sure it wasn't a poorly fitting servo arm (assuming you were using an aftermarket aluminum one)?

Using swb arms with bolt , the play is the bearing and case , all 6 of the new 8711's has some play only some worse than others . I have ruled out any linkage slop . Like I said 2 of the 6 niew servos only 2 of them were ok . My belief is the tolerances are not all the same . The 1 really bad one it was very noticable watching the shaft .

The hunting issue I have heard and can understand but what about the newest generation of hitecs, do they have same issue?
Hey Billy you flying tomorrow?