RunRyder RC
 4  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1965 views
HelicopterRadio - Servo - Gyro - Gov - Batt › Jr 8611 High torque servo
12-04-2005 09:25 PM  12 years agoPost 1
Nigel Gordon

rrApprentice

United Kingdom

My Posts: All  Forum  Topic

Hi, doe's any one any thing about this servo and where can we buy one in the uk.

DS8611 Ultra Torque 220/260 Digital on 6v.

Nigel

PM  EMAIL  GALLERY  Attn:RR  Quote
12-04-2005 09:36 PM  12 years agoPost 2
9387ASH

rrElite Veteran

UK

My Posts: All  Forum  Topic

This is one of those funny Horizon / JR codes. I am currently waiting for info from JR as to how to interpret the US JR Servo numbers.

If you look at the Servo's that JR (Japan) publicise, you will see that this servo doesn't show up. This is one specifically for the US market.

PM  EMAIL  Attn:RR  Quote
12-04-2005 09:41 PM  12 years agoPost 3
Nigel Gordon

rrApprentice

United Kingdom

My Posts: All  Forum  Topic

Hello Mac Man,

Here is it's low down.

DS8611 Ultra Torque 220/260 Digital
Overview
If you'd be impressed by a standard-size servo that delivers 260oz/in of torque, just try the DS8611 digital on 6 volts. There's a lot more than just stump-pulling power and incredible holding torque to recommend the 8611 as a giant scale or jet enthusiast's dream.
To begin with, the DS8611 features the tightest, most precise alloy gear train JR's ever produced. So the 8611's exclusive, zero deadband accuracy will endure through series upon series of punishing, high-load maneuvers.What's more, the DS8611 boasts an ultra-rigid, 6-screw anti-distortion case along with the industry's only integrated, miracle plastic heat sink to ensure, preserve and protect the longevity of its phenomenal performance. And finally, the scant 2mm longer and wider DS8611 will fit often with little or no mounting modification just about anywhere any "standard-size" JR servo was originally installed.

Before we brought the 8611 to market, we selectively distributed over 200 units among Team JR flyers,instructing that they be used in only the most demanding, high-stress, high-temperature environments possible. Here's what they had to say:


4-time TOC champ Quique Somenzini replaced his model's rudder servos with 8611s and reported the increase in response was so marked that he actually had to adjust the values of some of his mixes.
Every Team JR member that was a part of the 8611 test effort gave it the the highest praise accorded any JR servo tested to date.
BVM Jets' Bob Violett called the DS8611's power "tremendous" and noted its "total authority" in high-G maneuvers with his exhaustively-tested KingCat jet.


Key Features

Ultra 220oz of torque (4.8v)
New case design to handle the additional loads
Ultra precise alloy gears
Digital design offers outstanding holding torque and precision

Nigel

PM  EMAIL  GALLERY  Attn:RR  Quote
12-04-2005 09:51 PM  12 years agoPost 4
9387ASH

rrElite Veteran

UK

My Posts: All  Forum  Topic

Hmmmm it states a new case design. The 8511 servo uses the 6 screw case, I wonder if the 8611 is based on the 8511. Will have to look at the specs.

PM  EMAIL  Attn:RR  Quote
12-05-2005 05:45 AM  12 years agoPost 5
learmd

rrApprentice

Modesto, CA

My Posts: All  Forum  Topic

from my understanding.. going thru the jr catalog...it doesnt mention the 8411,8511,8611's as heli servos.. and i know there was a big stink about the 8411's in heli usage.. i think the same goes for the 8511's and 8611's.. now i'm not a jr rep nor any other rep to the matter...but just getting this from the research i have done.. if anyone has any other news it would greatly be appreciated as this is just my own .02 worth and i'm still researching myself

Harold

crashes sponsored by VISA, MASTERCARD, and AMEX.. just like your heli.. never leave home without it

PM  EMAIL  GALLERY  Attn:RR  Quote
12-05-2005 10:02 AM  12 years agoPost 6
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Hey,

I have 8511's in a couple of my heli's and all i can say is they are awesome!!!! Looking at the spec's it looks like the 8611 is bascially a 8511 with the numbers jiggled round abit, like the PCM9X which is 9303 in the US!!(Must be an American thing!! )

BUT, i'm no expert!! IF anybody can clue us in on this it's Mac-Man!!

Cheers!

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-05-2005 05:00 PM  12 years agoPost 7
u.k. sailor

rrVeteran

cambs uk

My Posts: All  Forum  Topic

hi rotorhead 486, what voltage are you useing this servo at and can any body tell me the speed to 60degrees?

PM  EMAIL  Attn:RR  Quote
12-06-2005 09:02 AM  12 years agoPost 8
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Hey,

I have a set of these in a R90 running a standard 4.8v, i believe these servos are rated at 15kg or torque at a speed of 0.19'.

I am also running a set on a Duralite powered system running at 5.1v.

Cheers!

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-06-2005 11:09 PM  12 years agoPost 9
9387ASH

rrElite Veteran

UK

My Posts: All  Forum  Topic

Quick update re numbering of JR Servo's. I have been in contact with my contact in JR and she advises me that they do renumber a few for the US market BUT also that JR manufacture some servo's specifically for Horizon !

Once the move of the office (et al) is complete, I will submit a listing to JR for confirmation etc. As soon as I know, I will advise accordingly.


PM  EMAIL  Attn:RR  Quote
12-07-2005 09:08 AM  12 years agoPost 10
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Hey Mac-Man,

Thanks for the update, did they mention why they only produce these specific servos for the US market and not the rest of the world??

Cheers!

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-10-2005 09:26 AM  12 years agoPost 11
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Hey,

Thought i'd just struck gold!!!!!!

I've been searching for a fast JR servo that is similiar to the Futaba 9252, JR produce a servo that is faster than the 9252 but has the same torque but this servo had some issues and was deemed not for helicopter use. The servo was/is the 8417, there is an updated version of this servo but whether or not it's just one of the renamed US/Non Us version or japan version i don't know but it's called the 8455.

This servo would be perfect if only they could sort out the issues.

Thought i'd struck gold when i saw this servo untill i saw the listing that it was same as the 8417. Bugger!!!

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-12-2005 10:27 AM  12 years agoPost 12
UpstateRotor

rrApprentice

Upstate NY

My Posts: All  Forum  Topic

8417 has "issues", huh? I'd like to read more detail about that. Do you have any links to this topic?

PM  EMAIL  GALLERY  Attn:RR  Quote
12-12-2005 10:55 AM  12 years agoPost 13
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Hey,

I've never personally experianced any failures but if you try a search which is what i did then it brings up a few posts with topics about this servo.

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-13-2005 05:16 PM  12 years agoPost 14
UpstateRotor

rrApprentice

Upstate NY

My Posts: All  Forum  Topic

"8417 not for heli use...", bah!

I did the search, I run the servo, I've spoken with the "gurus" and there are NO ISSUES!

If you read through the posts, it is evident that quite a few folks run these on the cyclic or throttle with great success. The only negative I found was a gent who put it on a tail and didn't like the outcome. Later it was stated that the servo is not recommended by Horizon Hobbies for the tail.

I saw one post where the fellow had a throttle problem and considered his 8417 as a potential culprit, but later determined his TJ sensor was loose.

Checking the facts...

PM  EMAIL  GALLERY  Attn:RR  Quote
12-13-2005 05:37 PM  12 years agoPost 15
DOKEY

rrProfessor

Northamptonshire UK

My Posts: All  Forum  Topic

I did the search, I run the servo, I've spoken with the "gurus" and there are NO ISSUES!
It seems to depend which country you are in!!
In the UK it was changed at not recomended to be used on a heli.

Have a look Rotar Softs post, http://www.runryder.com/helicopter/...?highlight=8417

Although was the servo changed from the earlier days ?
Please, just the facts, sir. Your opinions are WAY off base.

Ryan.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-13-2005 05:56 PM  12 years agoPost 16
UpstateRotor

rrApprentice

Upstate NY

My Posts: All  Forum  Topic

From your post link:

"Here in the US there were problems with the motors in the 8417 when they first came out. The US distributor, Horizon Hobby, recalled the servos and replaced the motors for free. End of problem. Apparently the UK distributor either isn't capable of doing this work or didn't want to incur the expense of doing this, and simply said in essence, 'go $hit in your hat' and took the easy way out and said not recommended for heli use. So it appears that the problem resides in the UK and not the rest of the world. Your loss not ours."

From Horizon Hobbies web catalog:

"With lightning-fast speed and substantial torque, the DS8417 is for helicopter enthusiasts looking for improved gyro authority and fixed wing pilots looking for instantaneous control."

It seems either we have another servo numbering difference or some folks in the UK are working off of OLD data. Additionally, it seems odd to me that Horizon Hobbies now advertises the 8417 for the tail when in the past it was suggested that the 8417 was not suitable for the tail?! I may have jumped on this a little too hard as the experience with the 8417 in the states is radically different than that of the folks in the UK. Anyone tight with JR or Horizon care to chime in???

PM  EMAIL  GALLERY  Attn:RR  Quote
12-13-2005 09:18 PM  12 years agoPost 17
jb_turner

rrElite Veteran

USA

My Posts: All  Forum  Topic

"when in the past it was suggested that the 8417 was not suitable for the tail?!"

We have had some heated discussions about this issue in the past here on Runryder. As far as who stated that 8417s were not suited for heli use it was never proven who or what company suggested that... I believe it was all here-say in Runryder with people quoting/misquoting other people and somehow it being translated as fact. JR as far as I know has always stated the 8417 is suited for heli use.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-14-2005 02:54 AM  12 years agoPost 18
UpstateRotor

rrApprentice

Upstate NY

My Posts: All  Forum  Topic

That is exactly my point...Rotorhead stated above that the 8417 was "deemed not for helicopter use" without any factual evidence. At the end of the day the 8417 (that is available in the US and produced by JR) IS suitable for heli use and, in fact, works quite well.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-14-2005 09:49 AM  12 years agoPost 19
RotorHead486

rrKey Veteran

England

My Posts: All  Forum  Topic

Wow...Wow...Wow!!....What's all the Hub-Bub about!!!!

In future i'm goin to keep my gob shut, everything just turns into a slanging match on here!!!

The evidence is right here, all it takes is a little searhing!! nothing too strenuous!! Ya' Know!!

http://www.macgregor.co.uk/faq/Servos/DS8417.htm

Even Curtis does'nt advise them, and if you want a link for that also to save a search it's here:

http://www.curtisyoungblood.com/faq...=Radios::Servos

Cheers!
RH486

One Reason For Crashing'Rogue Servo Bent on World Domination'!!
FLP Flight Team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-14-2005 10:04 AM  12 years agoPost 20
UpstateRotor

rrApprentice

Upstate NY

My Posts: All  Forum  Topic

LMAO! It seems that the experts can't even agree. I shouldn't be surprised.

Anyway, for those interested in using the 8417 in helis, there are a couple of misfits utilizing this servo in their machines with no problems.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1965 views
HelicopterRadio - Servo - Gyro - Gov - Batt › Jr 8611 High torque servo
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Tuesday, December 12 - 8:31 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online