Go Back  R/C Tech Forums > General Forums > Electric On-Road
Basic setup tips >

Basic setup tips

Basic setup tips

Old 10-11-2010, 08:16 PM
  #1  
Tech Adept
Thread Starter
 
Missle's Avatar
 
Join Date: May 2010
Location: Cinci, OH
Posts: 112
Default Basic setup tips

Just wanted to start a thread to ask some "general" setup tips that could help more than just myself.
Steering: Is there a such thing as "differential" for the steering? For example, if the wheels are turined to the right, the R wheel turns 30 deg while the L only turns 25 deg (or vice-versa). If so, what's the proper term and what purpose does it have?
Thanks
Missle is offline  
Old 10-11-2010, 08:34 PM
  #2  
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,664
Default

Originally Posted by Missle View Post
Just wanted to start a thread to ask some "general" setup tips that could help more than just myself.
Steering: Is there a such thing as "differential" for the steering? For example, if the wheels are turined to the right, the R wheel turns 30 deg while the L only turns 25 deg (or vice-versa). If so, what's the proper term and what purpose does it have?
Thanks
It's called Ackerman. The basic purpose is to allow the front wheels to turn in different radii without slipping. The inner tire turns a tighter radius than the outer tire.

http://en.wikipedia.org/wiki/Ackerma...ering_geometry
CarbonJoe is offline  
Old 10-11-2010, 08:44 PM
  #3  
Tech Adept
Thread Starter
 
Missle's Avatar
 
Join Date: May 2010
Location: Cinci, OH
Posts: 112
Default

Thanks CJ. I thought I had read something about that before, but wasn't sure. So now to the 2nd part of the question; what is best for 1/10 size RC cars? Do we use positive or negative Ackerman (with positive being the inside tire turns more than the outside)?
Missle is offline  
Old 10-11-2010, 09:13 PM
  #4  
Tech Master
iTrader: (25)
 
timmig's Avatar
 
Join Date: Aug 2009
Location: Trabuco Canyon-- in the Pines!!
Posts: 1,769
Trader Rating: 25 (100%+)
Default

Simple--you DON'T want the tires to scrub---so the inside tire has to turn more than the outside.
T
timmig is offline  
Old 10-11-2010, 09:18 PM
  #5  
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,664
Default

How many people change the ackermann based on the average radius of the turns on the tracks they race at? Tighter turns require more ackermann.

How about if they change the toe? Adding toe out changes the circle radius slightly at full lock.
CarbonJoe is offline  
Old 10-11-2010, 09:34 PM
  #6  
Tech Regular
 
Join Date: Jan 2005
Posts: 499
Default

Here are some stuff that's worst a look.
Arn0 is offline  
Old 10-11-2010, 09:41 PM
  #7  
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,664
Default

The Xray Setup book: http://www.teamxray.com/teamxray/sho...p?file_id=6143
CarbonJoe is offline  
Old 10-11-2010, 09:49 PM
  #8  
Tech Elite
 
Foxxrocket's Avatar
 
Join Date: Jul 2008
Location: Sonoma County
Posts: 2,018
Default

Front toe out would make the car turn better on entry, but push on exit.
Foxxrocket is offline  
Old 10-12-2010, 10:04 AM
  #9  
Tech Adept
 
Join Date: Aug 2010
Posts: 217
Default

Originally Posted by CarbonJoe View Post
How many people change the ackermann based on the average radius of the turns on the tracks they race at? Tighter turns require more ackermann.

How about if they change the toe? Adding toe out changes the circle radius slightly at full lock.
You basically use ackerman to balance turn-in and corner exit steering.

If the car turns in too much and snatches and then pushes on corner exit use more akerman.
If the car is pushing on entry to a corner and spins on the way out or a corner use less ackerman.

Best overall setup tip i can give is that every little bit helps so if you can shave a few grams off do it. If your bearings need lobe then do them. Check camber after every meeting and that they haven't been knocked off by that half a degree in a shunt, check your droop setting haven't been knocked out. If you have any slack in the bearings, ball joints, suspension arms replace them.
All simple little things but they all add up. I would say i spend at least 4 hours on my car checking everything is just right and clean after every meet.

Last edited by YZFAndy; 10-12-2010 at 10:23 AM.
YZFAndy is offline  
Old 10-12-2010, 06:56 PM
  #10  
Tech Addict
iTrader: (1)
 
C&B RC's Avatar
 
Join Date: Sep 2007
Posts: 605
Trader Rating: 1 (100%+)
Default

This little PDF has helped me many times.

http://richardchang.com/hobby/rctips_tc_summary.pdf


Also

For a deeper understanding of what's going on with suspension tuning check this out:

http://www.stranahan-rc.com/corneringatthelimit.html
C&B RC is offline  
Old 10-13-2010, 05:22 AM
  #11  
Tech Regular
iTrader: (1)
 
Join Date: Jan 2010
Posts: 291
Trader Rating: 1 (100%+)
Default The X-ray book is gold!

Read it, learn it, memorize it or take it with you to the track. 99% of the questions you have are answered right there.

Here's a good tip for tuning how your car gets into a corner and gets out of a corner. Droop. Read about it in the book
woodys3b is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.