R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 05-05-2004, 01:12 PM   #16
Tech Champion
 
Join Date: Jan 2004
Location: Rockville, MD
Posts: 5,058
Trader Rating: 4 (100%+)
Default

This is the handling guide I downloaded for TC descriptions ofwhat each thing does.

http://home.tiscali.be/be067749/58/
__________________
Steve Walter
Sweep Racing USA/ Speed Passion USA/ Karens Famous Cookies (Transporter)
SRW141 is offline   Reply With Quote
Old 05-05-2004, 01:24 PM   #17
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

lower roll centre e.g higher longer camber links or lower wishbone blocks gives more body roll more grip less stabillity.

higher roll centre gives opposite.

same as softer springs give more traction less stabillity and more body roll.

also a car with a high c of g or ride height will give increase of grip but rolls moe thus losing stabillity.

on low grip tracks try higher ride height,lower roll center,softer springs etc.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-05-2004, 01:41 PM   #18
Tech Rookie
 
Join Date: Sep 2003
Location: Europe
Posts: 4
Default

One of the basic rules is that a lower CG will generate more cornering grip. Transfering more grip to the outside wheel will not give more cornering grip. A higher CG will give more traction when accelerating in a stright line like in dragracing.
AtheenaProjects is offline   Reply With Quote
Old 05-06-2004, 02:33 AM   #19
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

Quote:
Originally posted by AtheenaProjects
One of the basic rules is that a lower CG will generate more cornering grip. Transfering more grip to the outside wheel will not give more cornering grip. A higher CG will give more traction when accelerating in a stright line like in dragracing.
sorry,i dont think i expained very well.
when i say increase ride height i mean like 2mm at the most.
this will transfer more weight to the outside tyre but not enough for it to sleep side ways.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 02:43 AM   #20
Tech Initiate
 
Join Date: May 2004
Posts: 47
Default

Thanks everyone for the feedback

If the camber links are parallel to the suspension arm, I think this will result in a low roll center, right?

So if I angle the camber links to point down, roll center will be higher. Am I right or I got everything wrong
EUracer is offline   Reply With Quote
Old 05-06-2004, 02:47 AM   #21
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

Quote:
Originally posted by EUracer
Thanks everyone for the feedback

If the camber links are parallel to the suspension arm, I think this will result in a low roll center, right?

So if I angle the camber links to point down, roll center will be higher. Am I right or I got everything wrong
that is correct the more they point up the higher the roll centre the more they point down the lower the roll center.
if they are parelel with the wishbones its a low roll center as well.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 02:52 AM   #22
Tech Initiate
 
Join Date: May 2004
Posts: 47
Default

Thanks trf racer for your help.

Just one question. When you say pointing up (for high roll center), looking at the car from the driver's seat, say left back wheel, which part of the camber link has to point up?
EUracer is offline   Reply With Quote
Old 05-06-2004, 02:55 AM   #23
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

Quote:
Originally posted by AtheenaProjects
One of the basic rules is that a lower CG will generate more cornering grip. Transfering more grip to the outside wheel will not give more cornering grip. A higher CG will give more traction when accelerating in a stright line like in dragracing.

there is nothing basic when you talk about center of gravity,roll center,or ride height.
its just got to be a just write.not to much grip but enough and the same with stability.
i think you are confused about grip and stabillity.
stabillity is when cornering how flat the car is.
you can have a flat car going into and through a corner but it may have no grip.vice versa you may have a car the grip rolls but it has no stabillity.
so you got to have a balance bt stabillity and grip.
on ashphelt you normally go towards producing more gip ie softer springs lower roll center etc but on carpet youd want more stabillity then grip so youd stiffen springs and go for a higher roll center.
also remember car width makes a difference.
a wider car would have more stabillity but may lose grip.
a less wider car will have the opposite,more grip but less stabillity.
hope this clears things up better.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 02:57 AM   #24
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

Quote:
Originally posted by EUracer
Thanks trf racer for your help.

Just one question. When you say pointing up (for high roll center), looking at the car from the driver's seat, say left back wheel, which part of the camber link has to point up?
sorry,i meant that if you ant a high roll center the outer part of the link should be higher compared to the inner part of the link.from were ever you look.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 03:00 AM   #25
Tech Initiate
 
Join Date: May 2004
Posts: 47
Default

EUracer is offline   Reply With Quote
Old 05-06-2004, 03:04 AM   #26
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

Quote:
Originally posted by EUracer
that would give a higher roll center then compared to if the top link was parralel to the wishbone.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 03:06 AM   #27
Tech Initiate
 
Join Date: May 2004
Posts: 47
Default

So for example as in the photo above, if I make the upper link parallel to the bottom link, thus lowering the outer link roll center will decrease
EUracer is offline   Reply With Quote
Old 05-06-2004, 03:07 AM   #28
Tech Initiate
 
Join Date: May 2004
Posts: 47
Default

At last, I think I understood
EUracer is offline   Reply With Quote
Old 05-06-2004, 03:11 AM   #29
Tech Master
 
Join Date: May 2003
Location: UK
Posts: 1,244
Default

yes that is correct.you could also lower the inner pivet of the wishbone to get the same effect.
__________________
Tamiya
Much More Racing
LRP electronic
Futaba
Speedtechrc
trf racer is offline   Reply With Quote
Old 05-06-2004, 10:37 AM   #30
Tech Rookie
 
Join Date: Sep 2003
Location: Europe
Posts: 4
Default

trf racer

According to an article in Race tech magazine overall load transfer depends only on CG heigth and the width of the car's track. Dampers, springs and geometry only controls how the load transfer varies from front to rear and also how it varies as the car passes through the entry, apex and exit of the corner.
It also states that load transfer is bad for grip.
AtheenaProjects is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pavement Characteristics chicagokenji Electric On-Road 4 07-01-2007 10:03 PM
Sedan Body Shell Characteristics Thread chachi Nitro On-Road 73 07-15-2005 11:39 PM
Battery discharge characteristics...... Mabuchi540 Electric On-Road 6 11-16-2004 05:22 AM
Bodies have same characteristics as electric? edseb Nitro On-Road 5 04-12-2004 10:47 AM
Bodies & their characteristics jscamry Nitro On-Road 1 04-09-2003 03:20 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -7. It is currently 06:42 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net