RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 500 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › JR8411 For Airplane Use Only
02-12-2006 08:12 PM  12 years agoPost 1
gtech

rrNovice

Riverside, CA

My Posts: All  Forum  Topic

These servos are now tagged "For Airplane Use Only", what is the reason for this? At http://www.jrradios.com in the product descriptions is says this too but no explination is given. Does anyone know???

SHUT UP AND FLY!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
02-12-2006 08:22 PM  12 years agoPost 2
DOKEY

rrProfessor

Northamptonshire UK

My Posts: All  Forum  Topic

I imagine it will be down to the fact that the servo can not handle the vibes that the heli will subject it to ?

Ryan.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-12-2006 08:46 PM  12 years agoPost 3
Shortman

rrKey Veteran

Portland, Oregon

My Posts: All  Forum  Topic

There original audience was for giant scale airplane use, it is also metal geared and they do develop slop rather quickly. They made the SA version with nylon gears to reduce slop and for heli use.

Team JR
Team ThunderPower RC
Boca Bearings

PM  EMAIL  GALLERY  Attn:RR  Quote
02-12-2006 09:11 PM  12 years agoPost 4
airdodger

rrElite Veteran

Johnston USA

My Posts: All  Forum  Topic

The 8411sa is not for heli use. The 8311 is the heli servo. I do also think it was a vibration issue with the motor. Chris

Chris

PM  EMAIL  GALLERY  Attn:RR  Quote
02-12-2006 11:49 PM  12 years agoPost 5
Ronbo

rrApprentice

Puyallup, WA

My Posts: All  Forum  Topic

Yes, it was a vibration issue with the electronics. the 8311 has electronics suitable for helis.

Vbr
Ron
Rapor 90, YS91
MA 99SE, YS80
Blade 400 Spartan, Hitec stock frame

PM  EMAIL  GALLERY  Attn:RR  Quote
02-13-2006 12:25 AM  12 years agoPost 6
jb_turner

rrElite Veteran

USA

My Posts: All  Forum  Topic

So I venture to say that the 8411sa would be appropriate for an ION or Logo.

JB "Do a SEARCH" Turner

PM  EMAIL  GALLERY  Attn:RR  Quote
02-13-2006 04:30 AM  12 years agoPost 7
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

I understand that originally Curtis put plastic gears in the 8411 for tighter gear mesh. JR liked it and produced the 8411SA. The issue that developed over time with the 8411SA was in heli use, the servo motor would sometimes burn out or spin the pinion. Apearently, heli use puts more of a load on servos than airplanes.

I sent mine back for (torque) downgrade to 8311.

Wolfgang

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-13-2006 05:07 AM  12 years agoPost 8
gtech

rrNovice

Riverside, CA

My Posts: All  Forum  Topic

So should the 8411's be "Downgraded" to 8311's? I have about 10 of these servos in use right now.

SHUT UP AND FLY!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
02-13-2006 02:53 PM  12 years agoPost 9
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

The 8411 is rated at 155 oz./in. .18 sec. 2.03 oz.
The 8311 is rated at 130 oz./in. .18 sec. 1.87 oz.

Some people have had no problems with the 8411, a few have.
The 8311 is the high end servo option available with the 9303.
The recall is free to heli users . . . You make your own choices.

Wolfgang

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 500 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › JR8411 For Airplane Use Only
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Saturday, June 23 - 7:34 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online