XRAY - Model racing cars

It is currently Sat Nov 17, 2018 07:29:24

All times are UTC + 2 hours




Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Eccentrics adjust roll center?
PostPosted: Mon May 27, 2013 18:34:50 
Offline

Joined: Mon May 27, 2013 18:26:57
Posts: 6
When I use the eccentrics for the uprights and the bearing is in the lower position, do I raise or lower the roll center then?

rcbo


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Wed Sep 11, 2013 12:30:58 
Offline
team driver
User avatar

Joined: Fri Sep 10, 2004 19:27:57
Posts: 977
Location: Sweden
Raise


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Mon Sep 16, 2013 05:26:41 
Offline

Joined: Mon May 27, 2013 18:26:57
Posts: 6
Hi Alex,

Thank you very much for your answer but I'm a bit confused. When there was no reply in long time I e-mailed X- Ray and they actually answered "lower" :?:


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Sat Oct 05, 2013 12:31:00 
Offline

Joined: Sun Sep 20, 2009 15:17:09
Posts: 311
Location: Frankfurt, Germany
rcbo wrote:
Hi Alex,

Thank you very much for your answer but I'm a bit confused. When there was no reply in long time I e-mailed X- Ray and they actually answered "lower" :?:

It's correct that the rollcenter is set lower when the bearings are in the lower position.


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Sat Oct 05, 2013 22:00:50 
Offline
User avatar

Joined: Sat Oct 23, 2004 08:22:54
Posts: 896
Location: Holland
Because there are more ways to change the roll center this would be the most difficult way...

I know drivers who only use the eccentrics to set the ride height to the size tire without affacting the geometric of the suspension or only set the wheelbase.


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Thu Nov 21, 2013 08:45:58 
Offline

Joined: Thu Jun 07, 2012 22:06:59
Posts: 26
Easiest way to think about roll centres is if you have the bearing or eccenter in the "down" position you're putting the weight above it, this you've raised the roll centre.

You put the eccenter of bearing in the upper position and you're putting more weight bellow that line, thus lowering the roll centre.


Top
 Profile  
 
 Post subject: Re: Eccentrics adjust roll center?
PostPosted: Sat Nov 23, 2013 20:04:49 
Offline

Joined: Sun Sep 20, 2009 15:17:09
Posts: 311
Location: Frankfurt, Germany
JamesHealey wrote:
Easiest way to think about roll centres is if you have the bearing or eccenter in the "down" position you're putting the weight above it, this you've raised the roll centre.

You put the eccenter of bearing in the upper position and you're putting more weight bellow that line, thus lowering the roll centre.

Rollcenter is a geometry-only parameter. Weight doesn't effect it. Lower axle seat means lower rollcenter if ridehight and camber remain unchanged.

The virtual extensions of both the suspension arms cross more outside and/or lower (depending on the starting point) when the axle sits closer to the lower suspension arm (lower bearing seat). This has a lower rollcenter and thereby more roll as one result.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC + 2 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group