[Land-speed] Polar Moment

joseph lance jolylance at earthlink.net
Thu Jan 17 18:23:15 MST 2008


If I remember correctly, some American auto manufacturers (in the 1950s or 
thereabouts) went to zero or negative caster to reduce low speed steering 
effort (before power steering) with those nose heavy front ends. Then, when 
they went to power steering they kept the negative caster specs---that's why 
GM cars of that era handled so poorly.

Lance

----- Original Message ----- 
From: <NT788 at comcast.net>
To: "don thigpen" <piggy at accessatc.net>; "land-speed at autox.team" 
<land-speed at autox.team.net>; "Elon" <saltfever at comcast.net>
Sent: Thursday, January 17, 2008 1:53 PM
Subject: Re: [Land-speed] Polar Moment


> O deg in 7070,5050,8080,3deg 988 788 all go straight Jack
>
> -------------- Original message -------------- 
> From: "don thigpen" <piggy at accessatc.net>
>
> oh , i understand bump steer entirely and it is a matter of where you put 
> the steering elements of the front end more than anything , along with the 
> range of travel of the spindle . but ........  camber also has a lot to do 
> with it .  THE WHOLE THING HAS TO BE  WORK TOGETHER
>
> i can assure you that if you put zero or negative caster in a steering 
> spindle then you aint gonna keep it on any road ( unless that road is as 
> wide as the U S  ) ........... try it and report back to us , no fear 
> about crashing as you wont be able to get up to any kind of speed with 
> negative caster
>
> don t
> evo power & machine
> www.accessatc.net/~piggy
> www.snartracing.com


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