JR DS8411/DS8411SA Warning!

[Van - E-Mail LIST]

Eric / All,

By profession I am a Computer Engineer, and I specialize in Robotics. It
does not matter who makes the parts, where they come from, at some time or
another, a part on them ( the Robots )will fail. Sometimes it's many parts
in a week, sometimes it's only "1" part in 4 years . . . .electronics are
funny. ( And JR / Futaba and Seiko make ALOT of robotic servos )

As for JR, I have personally never ( knock on wood ) had one fail in any of
my planes. I have seen the 8411's die at the field, even right out of the
box, but so do the Futaba, Hitec and Airtonics units. It happens. How the
company resolves the issues, and services the customers when this type of
thing occurs is the real issue. JR is pretty much all over replacements when
they break, or in a recall issue.

Just my experience,

Van

________________________________________________

Van Flowers
AMA: 6216 IMAC: 2229
IMAA: 26019 NSRCA: 2778
www.rc-aerobatics.com




----- Original Message -----
From: "Henderson,Eric" <eric.henderson at gartner.com>
To: <discussion at nsrca.org>
Sent: Thursday, September 12, 2002 9:56 AM
Subject: RE: JR DS8411/DS8411SA Warning!


> Nope! the pattern servos fail too! - In my case it was an 8231.. Locked on
> full up aileron.... very rough day! there was a recall last year on
certain
> servos. I sent all of mine in. Got then back in 5 days.
>
> Eric.
>
> -----Original Message-----
> From: Oscar Suarez [mailto:suarez at pacific.net.ph]
> Sent: Thursday, September 12, 2002 4:50 AM
> To: discussion at nsrca.org
> Subject: Re: JR DS8411/DS8411SA Warning!
>
>
> Hmmm... there must be something on the heli's that the digital servos
can't
> take (even though they have so much holding power/torque) ... vibration
> perhaps, but if you think about it, our YS engines gives our a/c stronger
> vibrations than the helis, yet, they're holding very well.  I don't think
> the problem is only w/the DS8425/DS8411s, in my own experience, I had 2
> different DS8455/8417 fail on my Vigor heli early this year on 2 separate
> occasions (luckily I was still hovering on both times) and a friend who
had
> one fail as well on the first flight on his Voyager 50.  So why do the DS
> work fine in our pattern planes which subjects our servos to more
> vibrations compared to those on the helis? Oscar
>
> At 09:30 PM 9/11/02 -0400, you wrote:
> >I just pulled this from the Horizon Site:
> >
> >Notice to Helicopter Pilots using JR 8411/8411SA Digital Servo (DS)  [
top
> ]
> >
> >As a result of our own investigations and feedback we have received from
> >websites such as RC Universe and Run Ryder, Horizon and JR have dedicated
> >all of our available resources to investigating reports of motor failures
> in
> >our 8411 digital servos when used in helicopter applications.
> >
> >Our findings thus far have revealed that only a small number of 8411 DS
> >motors have failed. However, Horizon is taking these claims of failure
very
> >seriously - any failure is one too many. All additional findings will be
> >immediately shared with you on this site so please check back soon for
> >updates.
> >
> >Please know that your safety and trust is our foremost priority and will
> not
> >be compromised or taken for granted. We are committed to providing only
the
> >best products and service available in the RC industry so if you have ANY
> >questions or concerns regarding your 8411/8411SA servos being used in a
> >helicopter application, please do not hesitate to call our product
support
> >staff at (877)504-0233.
> >
> >________________________________________________
> >
> >Van Flowers
> >AMA: 6216 IMAC: 2229
> >IMAA: 26019 NSRCA: 2778
> >www.rc-aerobatics.com
> >
> >
> >
> >
> >----- Original Message -----
> >From: "Ronald H. Filteau" <filteau at sk.sympatico.ca>
> >To: <discussion at nsrca.org>
> >Sent: Wednesday, September 11, 2002 8:40 PM
> >Subject: Re: JR DS8411/DS8411SA Warning!
> >
> >
> > > Hi Folks
> > >
> > > What is the web address.
> > >
> > >
> > > Ron
> > > ----- Original Message -----
> > > From: "David Sweatt" <dsweatt at hotmail.com>
> > > To: <discussion at nsrca.org>
> > > Sent: Wednesday, September 11, 2002 8:30 AM
> > > Subject: JR DS8411/DS8411SA Warning!
> > >
> > >
> > > > I don't get on here very often, however I would like to make the
> pattern
> > > > community aware of some hubbub that is going on with the helicopter
> guys
> > > > right now. There have been quite a number of severe instances of
guys
> > > > crashing helicopters due to motors failing in the 8411 and 8411SA
> >servos.
> > > So
> > > > much so that Horizon has made a official statement on their website
> >about
> > > > it. I personally fly these servos in both pattern ships and
> helicopters
> > > and
> > > > have not had any issues, but I know several heli guys who have, and
> > > several
> > > > guys who were able to prove it to Horizon and have all of their
crash
> >paid
> > > > for. Palomar RC field in San Diego has actually BANNED the use of
> these
> > > > servos in any aircraft at their field until JR/Horizon resolves the
> > > problems
> > > > they are having with them. And several other fields in California
are
> > > > following suit. Anyway food for thought, don't want to start a big
JR
> >vs.
> > > > Futaba or whatever controversy here, I'm just passing along this
> > > > information. I have several good pattern buddies that also use these
> > > servos
> > > > and I wouldn't feel right if their ship crashed and I had kept my
> mouth
> > > > shut! Thanks, David Sweatt
> > > >
> > > >
> > > >
> > > > _________________________________________________________________
> > > > Chat with friends online, try MSN Messenger:
http://messenger.msn.com
> > > >
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