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07-15-2002 07:06 AM  16 years agoPost 1
helidude

rrApprentice

Sunny California

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I'm considering upgrading to some 8417DS on my Furys cyclic.
Think I'll have any problems?
Thanks

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07-15-2002 08:19 AM  16 years agoPost 2
Ehab

rrApprentice

Beautifll San Jose, CA, Good old USA

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Just make sure you have the latest motor in them. JR had initial problems looong time ago with the motors.

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07-15-2002 08:27 AM  16 years agoPost 3
Will B

rrVeteran

Bicester, Near Oxford, UK.

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Yikes........... From what experiences I've had and have heard of with 8417's I'd steer clear of 'em. There was a bad batch about, do a search for 8417 and no doubt you'll bump into the thread.... I think it was called "servo failures-which ones were they?" Personally after reading some of the stuff that people have experienced with the 8417 I wouldn't use them, I just wouldn't be happy with that doubt in my mind.
I'm using DS8203's in my OS 90 Fury Extreme, and they are holding out fine. I have some DS 8204 which are even more powerful. Both these servos are for the Asia market and are rated at .19/60*

Cheers, Will.

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07-15-2002 08:41 AM  16 years agoPost 4
kawaznic

rrApprentice

Bréval, FRANCE

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Sorry, but even the servos with the latest motors have some problems!!!
For CCPM, you should choose 9252 or 8301.

I have 2 8417 new in boxes... And i will leave them in boxes.

- Protos
- CYE RAVE ENV CGY 750
- JR Nex E8 CGY 750

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07-15-2002 11:10 AM  16 years agoPost 5
Madcow

rrApprentice

Townsville, QLD, Australia

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Aren't the 8417's really for the tail servos? I'd say they'd work nice and fast in a 30 size, but 8411SA's are the go for a 60 size - if you're going JR.

There was some debate about the 8411's too. Firstly, the SA edition uses plastic gears to prevent slop getting into the drivetran after some use. Also, there were quite a few fails. JR/Horizon said that they have so much torque that if there was any (much) binding of the servos than the armature in the motor could slip/break.

Personally, I'd tend to believe that, BUT I went Futaba 9252's because they have the right size servo arms (actually the 19.5mm wheels) for the Fury. Apparently there's an Airtronics wheel that will fit on the JR servos. You prety much need the wheels to set up the CCPM accurately or maybe start drilling your own holes. *shrugs*

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07-15-2002 12:36 PM  16 years agoPost 6
z11355

rrMaster

New England

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the 8417 failures were due to 2 reasons.

First, there was a bad batch of motors when
they were originally introduced. That's ancient
history unless you buy them used. Look for the
blue dot on the back of the case.

Second, although Whorizon originally claimed
them to be slightly less expensive than 2700/8700
tail servos, they really dont cut the mustard,
particularly on high frame rate.

On cyclic they are no problem and you'll see
the same survival (or failure if you look at things
that way) rate as any other high qual. servo.

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07-15-2002 05:20 PM  16 years agoPost 7
kawaznic

rrApprentice

Bréval, FRANCE

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hi.

i had got a 401 + 8417 combo. It last 1 month.
The servo had a "dead point". It means that in a given position that the servo was not moving any more !!!!

8417 is not for tail usage.

- Protos
- CYE RAVE ENV CGY 750
- JR Nex E8 CGY 750

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07-15-2002 06:04 PM  16 years agoPost 8
Jeff H

rrKey Veteran

Cincinnati, OH

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I've got a 401 and 8417 combo as well. It has worked flawlessly for 6 mos, but I do NOT use the gyro in digital mode.

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07-15-2002 06:18 PM  16 years agoPost 9
Brian Bennett

rrKey Veteran

Dugway/Tooele UT, USA

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I would advise not using the 8417 in combo with the 401 or 501 as their frame rate is too fast for the 8417. Definitley keep the digi-mode switch off on the 401 if you decide to ignore the post. Use the Futaba tail servo instead. I would not use it with the 5000T (numerous post and JR notice state to only use the 2700G with the 5000T), same problem. I have read many a report of the 5000T as a non-8700 "servo killer".

Does one need a 0.10 sec/60 speed servo on the cyclic? If it has to be JR than I would go with the 8411's. If they are good enough for the pros... For the tail I would personally love to get my hands on the older 2700 G servo. They kicked butt. The 8700 is supposedly a better performer, but the 2700 is old reliable with nearly as good of performance.

--Gi

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