3DRC

My Feedback: (3)

I am building a new 35% aerobatic. It is just about timee for buying the servos. I have always used 8411 servos on all surfaces but the gearline develores the rattle/slop after a while. Which of these servos would you recommend. I have searched the Horizon site and some of the international sites but you guys haven't released much yet.

We have used the 8411SA on a 40% Carden Edge (not my bird) and they seem to be fairly precise and smooth with the nylon gear train. I am a bit concerned as to the wear /shock taking ability though.

Any and all feedback welcome. I am sure that this will be a very common question as the new 8611 comes out and the arival of the 8311.

A very loyal JR user,
Thanks,

Bob Bean

Rcpilot

My Feedback: (78)

I think the 8411SA is a great servo for planes of this size. I think it was originally designed for helis, but I read something recently that said they (JR) recommend the 8411SA for all giant scale planes, precisely because it has better wear life in the geartrain.

The 8231 seams to have a different kind of nylon composition in the gears. I've seen plenty of standard servo gears and they are usually plain white in color. The gears in the 8231s are kinda ivory in color-- or off white. Maybe these are a different type of nylon which can withstand shock loads better. Just speculation on my part.

I've never seen the gears in an 8411SA. Are they plain white in color or are they ivory in color?

I think the reason the 8411SA was developed is that JR did realize the geartrain slop in the 8411 and needed a geartrain that would work well in the helis on rudder. Helis can't handle much slop on the rudder servo; so they introduced the nylon geared 8411SA.

I'm another very loyal JR user.

dsnyder

We do not recommend the 8411SA in aircraft over 1.20 size. The nylon gear train, combined with the high torqe of the servo and flight loads of giant scale aircraft can take the gears out of the servo. The 8311 is a heli application servo, and uses the same gear train as the 8411SA. For giant scale aircraft we recommend the 8411 or the new 8611 when they are available. For 8411's, we will repair/replace the gear train at no charge to return the servo to factory specs when you send the servo in to us. The 8611 has a new gear train that does not have the wear issues that the 8411 servo has had. The 8231 servo will also work in 35% aircraft if using 2 on each aileron. For one on each aileron, the 8411 or 8611 should be used.

3DRC

My Feedback: (3)

Thanks Danny. What is the time table for the new 8611 release? I have gotten some really great feedback from some of the current users/sponcered pilots.

Also, my flying buddy has been using the 8411SA on his 40 Carden Edge. They are VERY smooth and crisp as compared to the 8411 servos. Is the use of the SA a disaster waiting to happen? He flies very hard 3D????? I know the gear train is the same part # as the 8101 series and I would hate to see one fail. He really put it through the paces today and they seemed to hold great.

Thanks,
Bean

dsnyder

Using the 8411SA in a giant scale application, especially hard 3D, is not advised. The current ETA on the 8611 is late next month, but this is subject to change. I have been using the 8611 in one of models for 100 flights approximately, and they are simply awesome! The 8411 is a great servo, but the 8611 tops it.

Dave Smith

Danny:

Is the 8611 digital?

What does it weigh?

Are the gears metal?

I have an 8411SA on B/O. Are the 8411SA's expected to be in stock soon?

Thanks,,,,,,,,,,,Dave

dsnyder

Yes

The weight is 2.24 oz. Torque is 220 oz-in at 4.8, 260 at 6V. Speed is .18 sec/60 degrees at 4.8.

Yes, it uses a new alloy gear set.

I do not have a confirmed date at this time, but what I am showing is November.

3DRC

My Feedback: (3)

Alright... Next question.

What is the case size. I have been told that it is slightly larger than the 8411. I would like to make sure I build my new Edge to fit the case size???

Thanks for all the great information,
Bob Bean

dsnyder

Yes, that is correct. The case is about 2 mm larger in length and width than the 8411. I installed them in my plane in place of 8411's and did not have to modify anything. They simply dropped in. The dimmensions of the servo are 1.58" L x .82" W x 1.56" H. If there is just over 2 mm space between the opening and an 8411 in every direction the 8611 will fit without any modification.

3DRC

My Feedback: (3)

Thanks Danny,

Everyone should really get excited about this new servo if it is as sweet as the feedback has been so far. I think QuiQue was flying them as he just won the Masters.

Bob Bean

dsnyder

Quique was using them in the masters. The 8611 for our team members that have been testing them, including myself, have been working EXTREMELY well.

Mac_Man_UK

Danny,

Do you have a ballpark cost for these new servo's ?


Tony

bob_nj

My Feedback: (62)

Will the gear replacement policy on the 8411's change since there is now an alternative?
Also, is there any chance of having some sort of exchange/purchase program for those of us that have tons and tons of 8411's? Thanks and keep up the good work_bob

dsnyder

It looks like the retail price is $169.99 and the price on our web site is $114.99. To my knowledge nothing will change on the gear replacement policy, at least at this time. Keep in mind that the 8611 is an entirely new design, new case design, new gear design, etc. I do not know of any exchange/purchase programs in the works at this time.

SLC

My Feedback: (2)

So Danny, Tell us, after 100 flights what happens when you turn on the switch? Any jumping around of contol surface because of gear wear ? I'm about to pull the trigger on 8 new digitals and want to get the best value for my money. Also price is a concern. Those HS-5945 are looking pretty good. Don't get me wrong I love JR products.

dsnyder

No, I have seen no gear wear, nor is there any jumping around of the control surface.

aviti

My Feedback: (54)

Danny - I have 8 8411's new in the box that I purchased from Don's Hobby Shop. I bought them about 6 months ago but have not taken them out of the box yet. If Don's won't exchange them, would Horizon consider exchanging them for the new 8611's?

Also, will one 8611 be enough on the rudder of an Aeroworks 33% Edge?

dsnyder

I'm sorry to say that we don't have any type of exchange system in place at this time. The 8611's are not available yet either. We estimate that they will be here late this month to early next.

It may be enough, I haven't tried just one on the rudder of a 1/3 scale plane yet, but I think I would use 2 of them anyway, just to ensure an effective rudder.

bob_nj

My Feedback: (62)

Will the 8411 arm fit on the 8611?

dsnyder

Yes, they use the same spline.

Kris^

My Feedback: (1)

Does anyone have a technical write-up of the 8611's? I'm looking for specific differences between them and the 8411's so that I can make an informed comparison as I consider buying them. Of the most interest to me would be not only the advertised torque and speed ratings, but how the geartrains design differs form teh 8411's (thickness, materials, bearings, etc.), what the proposed life-span of the gearsets will be, and how JR has addressed the extremely tight deadband issues that caused the 8411's to wag rudders if there was springiness or a little slop in the pull-pull systems.

I RAN away from the 8411's a couple of years ago, mainly due to the issues outlined above, and have been very happy with the HiTec line of products, but if JR has come out with a superior servo, such as the 8611, that is half the weight of a 5735 jumbo, yet exhibits equivalanet performance and has few issues with longevity ndn geartrain wear, I would seriously consider buying it.

(3 years ago at Toledo I chewed the ear of the JR reps. . guess they finally listened. )

dsnyder

I do not know of any technical write-ups on the 8611 at this time. The torque and speed specs of the 8611 can be found above in an earlier post. I do not know of a proposed life-span on the gear train, but I have found the gear train to be extremely solid without the wear traits of the 8411. This is mainly accomplished through tighter tolerances used and redesigned gears. The deadband in an 8411 is not extremely tight, if that problem happens it is caused by slop in the gear train and/or slop in the set up. Or a problem with the servo pot being worn etc. The gear train of the 8611 having been changed from the 8411 should cure the issue on the servo end.

julien.veschamb

My Feedback: (1)

Hi,

could we use JR DIGITAL SERVO like 8411, 8511 and 8611 with 5 battery ( 1.2V*5 = 6)

thanks

Jleyland

My Feedback: (1)

Hi Danny - I sent in two 8411's for gear slop. I was told that since I did not send a reciept in that I would be charged $49.00 to replace the gears. I just talked to a employee there- I told him how in the past you guys replaced them for free without a reciept. Is there a reason that i'm being charged to replace the gears? I'm always happy with Horizon products and service, this may just be a misunderstanding.
thanks,
Jon Leyland

dsnyder

You will need to check with your local JR distributor (Graupner) for information on 6 volts. Our products here in the US you can use 6 volts without any problems, but that could be different in your area.

The only reason we wouldn't change the gears at no charge is if they were not purchased from Horizon or one of Horizon's dealers, meaning if they are gray market servos, or if they were abused. I'm not sure if this is a case of confusion on the part of the radio technician, but I am going to get that credited back for you.