rec.autos.simulators

Car Physics: Suspension setups

Ruud van Ga

Car Physics: Suspension setups

by Ruud van Ga » Tue, 15 Jan 2002 22:05:46

On Fri, 11 Jan 2002 18:00:12 -0000, "Jonny Hodgson"



>> On Fri, 11 Jan 2002 14:40:51 -0000, "Jonny Hodgson"

>> >You can probably assume linearity for road/race cars; if you're
>> >going off-road, you might want to consider at least a quadratic
>> >approximation or even something more accurate.

>> Good to know, thanks for that piece of info.

>Do bear in mind that unless I cite actual evidence / experience,
>I'm only talking in approximate terms so don't take everything
>I type as gospel ;-)

:)
You'd say the camber change is really a sine; probably the wheel makes
a circular motion when going through the suspension. But for small
sine values, sin(x)~x.

Ruud van Gaal
Free car sim  : http://www.racesimcentral.net/
Pencil art    : http://www.racesimcentral.net/

Jonny Hodgso

Car Physics: Suspension setups

by Jonny Hodgso » Wed, 16 Jan 2002 04:09:05


Ha!  You wouldn't disclose who you were working for last time I
asked... thank you very much!  <eg>

Is this for internal/development use, or is said company planning
on releasing this as commercial software then?
</pushing luck>

Jonny

Jonny Hodgso

Car Physics: Suspension setups

by Jonny Hodgso » Wed, 16 Jan 2002 04:10:27


> >> On Fri, 11 Jan 2002 14:40:51 -0000, "Jonny Hodgson"

> >> >You can probably assume linearity for road/race cars; if you're
> >> >going off-road, you might want to consider at least a quadratic
> >> >approximation or even something more accurate.
> :)
> You'd say the camber change is really a sine; probably the wheel makes
> a circular motion when going through the suspension. But for small
> sine values, sin(x)~x.

Hmmm... you might be able to sell me a Fourier series, although
I doubt a single sine comes anywhere near once you get to large
angles.

Point taken and agreed in practice, however ;-)

Jonny

J. Todd Wass

Car Physics: Suspension setups

by J. Todd Wass » Wed, 16 Jan 2002 09:49:17

 LOL!!  Damn!  You got me (I remember that thread :-))...  We're hopefully
going to wrap up things in a couple months here.  It'll be a free download
(advertising for you know who) and I'll let you all know if y'all care too.
Warning....  "It's no GPL"!

Todd Wasson
---
Performance Simulations
Drag Racing and Top Speed Prediction
Software
http://PerformanceSimulations.Com

My little car sim screenshots:
http://performancesimulations.com/scnshot4.htm

Jonny Hodgso

Car Physics: Suspension setups

by Jonny Hodgso » Thu, 17 Jan 2002 04:09:11


Having seen their 1/10th offering running in the wet with a Can-Am
wedge bodyshell, trailing twin vortices in the spray as second gear
slams in... hell yeah, I'm interested!

Jonny

J. Todd Wass

Car Physics: Suspension setups

by J. Todd Wass » Thu, 17 Jan 2002 12:06:04

  Haha!  Well, we don't have any wet weather stuff in.  Lots of extra work and
I'm only in charge of the driving model itself so...  It's a bit buggy right
now sometimes, these little cars are a real b**ch to model and keep stable.
Although we've got a suspension setup system that I haven't seen before yet..
You can do most of your own suspension geometry :0)  

Todd Wasson
---
Performance Simulations
Drag Racing and Top Speed Prediction
Software
http://PerformanceSimulations.Com

My little car sim screenshots:
http://performancesimulations.com/scnshot4.htm


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