JR NES 4000 servo

[Troy Newman]

Again Agree with Dave L,

The 4000's are very close in performance to the 8231's...they will eat a 
little more battery. These were the first "digital" style servos 
available...They are a few years old....Say 97-99 in that era as the digital 
servos came out then....The super servos have tremendous holding power and 
centering...In fact they are as good or better than some of the current 
digital servos of today.....The big issue was battery drain...we sacrificed 
some of the precision and holding power to go with digital servos...but the 
digital servos use less battery power.

I would highly recommend running the servos. They are superb for pattern 
models. As stated check your batteries every flight....They will draw a 
little more current...I would estimate 15% more than a normal coreless high 
torque servo and maybe 5-10% more than a digital.

One thing that will drive them crazy is bad gears or pots....these things 
are so good at finding center that when the pots and gears wear out they 
will really eat battery juice hunting for center....So keep an eye on them 
with a volt meter every flight...you'll learn their character really quick 
and easy...

They are great servos....4000's, 7100's I used these for years in pattern 
models. Even before I switched to JR TX/RX gear the Super Servos were king. 
And still are awesome performers.

Troy Newman


>From: davel322 at comcast.net
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: RE: JR NES 4000 servo
>Date: Mon, 17 Nov 2003 02:55:47 +0000
>
>JR made several "super servos" - the ones suitable for pattern were the 
>4000, 7000, and 7100.
>
>The 4000 is not a low profile servo - it is a "standard" case - same as 
>4031/4131 - slightly different from the 8101/8231/8417/8411 which have the 
>wider spacing on bearings of the ouptut shaft.  The 4000 came with nylon 
>gears.  Very good servo - in my opinion, performance is equal to an 8231 - 
>but it is more power hungry than an 8231 as others have noted.
>
>The 7000 "super servo" is low profile servo (with nylon gears, same case 
>and gears as 7005).
>
>The 7100 is another low profile "super servo" which is basically the same 
>as the 7000 but with metal gears (7005 gears could also be retrofit).
>
>Regards,
>
>Dave Lockhart (Team JR)
>DaveL322 at comcast.net
> > I still use a few of them. If you fit 4005 nylon gears they are fast and 
>tight.
> > They are low-profile and work well in the thin wing. Quique was using 
>them last
> > year in pattern plane ailerons.
> >
> > Regards,
> >
> > Eric.
> >
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]On Behalf Of Adam Glatt
> > Sent: Sunday, November 16, 2003 8:23 PM
> > To: discussion at nsrca.org
> > Subject: Re: JR NES 4000 servo
> >
> >
> > JonLowe at aol.com wrote:
> >
> > >I ended up with an airplane that has two JR NES 4000 servos in it.  The 
>only
> > >info I can find on them on line calls them "Super Servos".  One site 
>indicated
> > >they may be an early form of digital servos.  Anyone know more about 
>these?
> > >
> > >Jon Lowe
> > >NSRCA 3612
> > >=====================================
> > ># To be removed from this list, send a message to
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> > >#
> > >
> > >
> > >
> >
> > I tried a few, and found them to be very very electricity hungry without
> > any advantage over digitals, so I gave them back and went with
> > digitals.  I think they were the intermediate between coreless and
> > digital for JR, and quickly shelved in place of the digitals which were
> > superior all around.
> >
> > =====================================
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