HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 24, 2012, 03:43 PM
Ja9
Registered User
Norway, Rogaland, Tjelta
Joined Dec 2004
161 Posts
Discussion
HighVoltage servos for FS3

My Freestyler3 needs new servos and I`m thinking og going for a high voltage set up. What are the best alternatives out there?
The Freestyler has traditional linkages, no RDS.
I need servos for both wing and fuse.
Ja9 is offline Find More Posts by Ja9
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 24, 2012, 04:10 PM
F3B
satinet's Avatar
Warwickshire, England
Joined Sep 2006
5,541 Posts
there are a few. Do you have flat servo covers or a bump?

There is the new hitec 7115th. There is a HV version of the sanwa 762.

Life or Lipo?
e.g
http://www.macgregor.co.uk/jrpropo/ds179hv.htm
satinet is offline Find More Posts by satinet
Reply With Quote
Old Sep 24, 2012, 04:13 PM
Ja9
Registered User
Norway, Rogaland, Tjelta
Joined Dec 2004
161 Posts
I`m currently running a Hyperion 1450mAh LiFe and regulator.
I have flat servocovers.
Ja9 is offline Find More Posts by Ja9
Reply With Quote
Old Sep 24, 2012, 04:15 PM
F3B
satinet's Avatar
Warwickshire, England
Joined Sep 2006
5,541 Posts
you want to remove the regulator?

It will need to be thin servo on the ailerons then.
satinet is offline Find More Posts by satinet
Reply With Quote
Old Sep 24, 2012, 04:18 PM
Ja9
Registered User
Norway, Rogaland, Tjelta
Joined Dec 2004
161 Posts
Yes, my intention is to get rid of the regulator.
The servos in the model is old and worn out, they have developed alot of gearslop over a few year F3F use.
Ja9 is offline Find More Posts by Ja9
Reply With Quote
Old Sep 24, 2012, 04:42 PM
F3B
satinet's Avatar
Warwickshire, England
Joined Sep 2006
5,541 Posts
Interesting thread I hope some people have some experience with these servos.

I am interested in the new hitec servo, but you don't always want to be the first.
satinet is offline Find More Posts by satinet
Reply With Quote
Old Sep 24, 2012, 04:54 PM
Registered User
Tuomo's Avatar
Jyvaskyla, Finland
Joined Aug 2003
2,449 Posts
Quote:
Originally Posted by satinet View Post
I am interested in the new hitec servo, but you don't always want to be the first.
I am definately not interrested in Hitec as long they have tested by the F3J/B community for one season. ...Or make it two seasons... But I am very interrested in sensible hig voltage 2x Life setup - that is future!
Tuomo is offline Find More Posts by Tuomo
Reply With Quote
Old Sep 24, 2012, 06:00 PM
kdt
Registered User
kdt's Avatar
Joined Feb 2007
432 Posts
Jr ds398hv

I used the new JR DS398HV servos in my Perfections in South Africa. I found there was a temperature issue with the trim on the first batch of the origional JR DS388 HV servos and they did not center very well. The new ones are awesome! They seem to use different model names throughout the regions of the World. Here is the link to Horizon for North America:

http://www.horizonhobby.com/products...ervo-JRPS398HV

I have MKS servos in my Maxa and have had no issues but they do not make high voltage servos as yet. Very good servos! I run a 4 cell Elite NiMh in the Maxa.

I am a convert to LiFe packs (Hyperion 1450mA).Never liked the idea of a regulator.

RDS frames and splines are available for the JR's for my new Fosa

JR DS398HV Specs
Application: High-performance scale sailplanes electrics and pylon models requiring High Voltage servos
Bearing: Dual
Bushing Or Bearing: Bearing
Gear Type: Metal
Height: 1.14 in (29mm)
Length: 1.18 in (30mm)
Servo Type: Digital
Servo Voltage: 6.0 - 7.4V (High Voltage)
Size Category: Specialty
Speed: 0.13 Sec/60-degrees @ 7.4V
Speed (at 4.8V): .10 - .14 sec
Torque: 575 oz-in (5.4 kg-cm) @ 7.4V
Torque (at 4.8V): 200 + oz-in
Weight: 0.7 oz (19.8 g)
Width: 0.43 in (11mm)

Quote:
Originally Posted by Ja9 View Post
My Freestyler3 needs new servos and I`m thinking og going for a high voltage set up. What are the best alternatives out there?
The Freestyler has traditional linkages, no RDS.
I need servos for both wing and fuse.
kdt is offline Find More Posts by kdt
Reply With Quote
Old Sep 24, 2012, 07:02 PM
Sink Stinks
Silent-AV8R's Avatar
Orange County, CA
Joined Aug 2004
4,535 Posts
With the notable exception of some models of MKS servos just about any servo rated for 5-cell NiMH (6v) will easily handle an unregulated 2S LiFe pack. I run nothing but 2S Hyperion LiFePO4 packs without regulator in everything I fly. My X3.8, Aspire and AVA Pro all have Futaba S3150 servos in them, never a single issue with them (and they are rated at 4.8 volts by Futaba). I have 3 helis and two pattern planes also running the unregulated 2S LiFe packs. No issues.

I have several friends flying JR that are using 2S LiFe unregulated with the DS390HV in the fuse and the DS398HV in the wings. Seems to be a solid setup.
Silent-AV8R is offline Find More Posts by Silent-AV8R
Last edited by Silent-AV8R; Sep 24, 2012 at 10:09 PM. Reason: tie-poh
Reply With Quote
Old Sep 24, 2012, 07:43 PM
kdt
Registered User
kdt's Avatar
Joined Feb 2007
432 Posts
LiFe / Lipo

The JR DS 398/390 HV's can handle a Lipo if you want. I ran the old 388's on
a Lipo in my Supras. The LiFe is less volatile. Everyone that I have talked to that use them love them. I'm told you should "always" balance charge the 2S Hyperion LiFePO4 packs to get the longest life out of them.

The New JR servos are also much quieter than the old ones.


Quote:
Originally Posted by Silent-AV8R View Post
With the notable exception of some models of MKS servos just about any servo rated for 5-cell NiMH (6v) will easily handle an unregulated 2S LiFe pack. I run nothing but 2S Hyperion LiFePO4 packs without regulator in everything I fly. My X3.8, Aspire and AVA Pro all have Futaba S3150 servos in them, never a single issue with them (and they are rated at 4.8 volts by Futaba). I have 3 helis and two pattern planes also running the unregulated 2S LiFe packs. No issues.

I have several friends flying JR that are using 2S LiFe unregulated with the DS390HV in the fue and the DS398HV in the wings. Seems to be a solid setup.
kdt is offline Find More Posts by kdt
Last edited by kdt; Sep 25, 2012 at 12:52 AM.
Reply With Quote
Old Sep 25, 2012, 02:44 AM
Registered User
Tampere, Finland
Joined Oct 2009
172 Posts
There is also a high voltage version of the Futaba 3150, just don't let the s-bus confuse you. It can of course be used as is, s-bus or without s-bus:

http://www.robbe.de/servo-s3172sv.html

Tommy
Tommy Wee is offline Find More Posts by Tommy Wee
Reply With Quote
Old Sep 25, 2012, 02:48 AM
Ja9
Registered User
Norway, Rogaland, Tjelta
Joined Dec 2004
161 Posts
does anybody know the difference between JR DS 378 HV and JR DS 398 HV?
Looks to me like they are the same servo.`
I`m thinking og going with one of these for the wing and maybe a JR z3650 for v-tail
Ja9 is offline Find More Posts by Ja9
Reply With Quote
Old Sep 25, 2012, 02:50 AM
F3B
satinet's Avatar
Warwickshire, England
Joined Sep 2006
5,541 Posts
I hope the new jr graupner hv servo is good. To be honest the graupner ds3288 had absolutely terrible centering.
satinet is offline Find More Posts by satinet
Reply With Quote
Old Sep 25, 2012, 03:31 AM
kdt
Registered User
kdt's Avatar
Joined Feb 2007
432 Posts
Jr ds 378 hv

Quote:
Originally Posted by Ja9 View Post
does anybody know the difference between JR DS 378 HV and JR DS 398 HV?
Looks to me like they are the same servo.`
I`m thinking og going with one of these for the wing and maybe a JR z3650 for v-tail
The 378 is the old servo (same case as new 390) . The new model DS390HV has new internals and is improved. The 378 and 390 has the lugs on the case to go in the fuse. May be different name in Europe.
kdt is offline Find More Posts by kdt
Reply With Quote
Old Sep 25, 2012, 03:33 AM
isoaritfirst
isoaritfirst's Avatar
Not a Brummie/but close
Joined Sep 2005
1,403 Posts
See the FS4 build thread - I used Sanwa HV. ALso used them in my AlliaJ.
Running off Hyperion LiFe 2100 packs.

Also in the FS4 thread see how I made the 2100 pack smaller. I have also installed the same pack in my FS3 - currently that has 3150 in wings and Graupners in the fus. The fus servos are protected with MKS individual in line regulators. The 3150 wing servos (FS3) are on longer wires and plugs which may drop V v slightly and seem to be a robust servo so taking a chance here.
The MKS regulators also work as a fuse on each line so it is worth considering installing them on every surface, they may just save your model if one servo fails.
My Needle DSL has them throughout.
Of course you are adding another component but with individual ones at least one failure may not be terminal.
isoaritfirst is offline Find More Posts by isoaritfirst
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold FS3 RDS Disser+PLANE QUIVER 68"er PRICE DROP Terminator Aircraft - Sailplanes (FS/W) 5 Aug 28, 2012 10:15 PM
For Sale FS3 - RDS - Orange/Blue - $2600 RTF Brand New jgs99v Aircraft - Sailplanes (FS/W) 12 Jun 29, 2012 01:04 AM
Wanted FS3 Incidences Pins mrfski Aircraft - Sailplanes (FS/W) 6 Aug 05, 2011 12:06 PM
New Product JR HighVoltage servos Happy|Harry Electric Heli Talk 6 Oct 28, 2008 01:16 AM
Discussion www.highvoltage-rc.com - WARNING!!!! CHEATERS!!! RickHustle Vendor Talk 3 Jun 09, 2008 04:07 PM