JR servos Q40/Q500  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> Pylon Universe - RC Pylon Racing >> QM-40 Racing >> JR servos Q40/Q500
Page: [1]

Login
Message << Older Topic   Newer Topic >>
JR servos Q40/Q500 - 4/10/2007 7:47:34 PM   
ptxman


 

Posts: 351
Joined: 7/31/2002
From: Calgary, AB, CANADA
Status: offline 		I was wondering if you 'JR racing dudes in the know' can comment:

Ive purchased some JR 3421's for elev/ail on my forthcoming Q40's. But I dont have enough for my airframes because they have been in very short supply & backorder status among most distributers here in Kanuckland. They used to stock 3421-SA's & 3421 (no further description).

- from the JR/Horizon website I take SA's to mean a plastic based gear train & the plain 3421 to mean metal gear, same torque & transit time specs. Is that correct?
- any comments on which is better for Q40/500, does metal wear faster & develop backlash faster under vibration etc?
- usually I interpret depleted supply to mean something new is coming in to replace it, any news in that regard?
- what would be next best JR in a pinch?

Thx, Peter
       Post #: 1

RE: JR servos Q40/Q500 - 4/10/2007 7:55:02 PM   
daven



Posts: 6911
Joined: 12/7/2001
From: Andover, MN, USA
Status: online 		Yes that is correct. The SA (sport application) is nylon geared, and the standard 3421 is metal geared. The often heard comment is that the metal geared servos develop slop quicker, but I have not noticed it with the digital versions. The SA version is a bit lighter and plenty strong enough from what I've seen.

In Q500, I think the 3421 is over kill and would stick with the standard 3121 mini coreless servo. I do like the 3421 for Q40 on Elevator and Aileron, but also use the Futaba 9650 which is a bit cheaper and does just as good a job.

I wouldn't classify myself as a JR guy, I just try to use the best stuff that any of the major guys make. Those servos are tough to beat in these classes.

_____________________________

Dave Norman

klasskote.com
supertrc.com

(in reply to ptxman)
       Post #: 2

Page:   [1]
All Forums >> RC Airplanes >> Pylon Universe - RC Pylon Racing >> QM-40 Racing >> JR servos Q40/Q500
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.457RCU1