David Gladwin

Does anyone have any experience with the new JR 7.4 volt servos ?
Regards, David Gladwin.

Moerig

Do they really havem at last. What are the model nrs? Seems a bit late since A123's are so much better than LiPos IMHO

Esprit

I found this mentioned on the front page of the JR website, then when you dig in you can see some info on the new servos.

New – JR High Voltage Servos - Due January '09

http://www.jrradios.com/Products/Def...dID=JRPS8711HV

http://www.jrradios.com/Products/Def...dID=JRPS8717HV

J

Dee Miller

My Feedback: (2)

Based on the botched 12X release, if they are saying Jan 09 there is a remote chance we will see them by June.
By that time most of us will be on A123 batteries and it won't matter. A123 batteries are now very easy to get and
you don't have to worry about charging them in the airplane.
Dee

Gary Jefferson

My Feedback: (167)

Actually, according to a recent conversation I had with Hitec it might matter a little bit; I was told by them that running the new A123's unregulated will reduce the life of the servos but they have no idea by how much. I was discussing the 5955's and the new 7955's.

It would be great if JR would keep up with the capabilities of the higher voltage 2.4 receiver bus and make all of their servos capable of handling the higher voltages. Hopefully it is on the way throughout the lineup.

schroedm

My Feedback: (1)

Won't we need to see a newer generation of powerboxes/buses/boards etc that allow 7.2v as a voltage output option now? Voltage per channel would be nice too so you could have 7.2v to some channels and 5.9-6v on others...?

I wouldn't want to run several of these bad boys (480oz/in torque!) in a single model without a powerbox or similar but currently they'll be limited to 5.9v-6v and thus back down to standard 8711 performance?

kirkj

My Feedback: (61)

i saw a release from the Chicago hobby show where JR is bringing out a complete machined aluminum servo, top case and bottom case. supposed to be in the 450 in/oz class and will be 7.4v as well.

Ali

My Feedback: (5)

Yeah.. At last.
I wonder if we can use them on 6volts here in the UK

invertmast

My Feedback: (23)

the heli guys have been running the JR 8717's on 2 cell lipo's for about a year now. Many people report no problems, but their does seem to be one or 2 that pop up each month that have mysterious "qualities".

And the spektrum/Jr 7100R reciever incorporates a 7.4v input and buss bar but also a regulated 5.2v ports for the throttle, rudder and gyro channel ports for the equipment that cant run on 7.4 v's

the technology is coming, just lagging behind for the jet guys it seems.

David Gladwin

Had a couple of emails about them. First field tests show them to be very impressive indeed, being used by a top TOC pilot.

Power for these servos can be handled by the Powerbox Royal. This unit can switch voltages to 5.9 or 7 so the HV servos can be powered at a stable 7v and servos requiring lower voltage can be fed direct from the receiver which is supplied with a stable 5 v.

My own PowerBox Royal is installed in a Euro but bench tests show it to be a really superb unit and the data recording is a very valuable tool, plus of course 5 programmable channels, make life very easy !

Regards,

David Gladwin.

hmjets

ACT also sells servos to 7.5 volts.
http://www.acteshop.de/product_info....oducts_id=2696

David Gladwin

ACT produces a lot of good stuff, I am using their gyros BUT it would help us enormously (and probably vastly increase their sales) if they published their web site in English !

Regards, David Gladwin.