[Staowners] FRONT END ALIGNMENT

[Richard Atkinson]

Mal,

Ignore this if I'm missing something but... whatever the signing  
convention for castor angle is, in reality the castor angle can only  
be one way - the 'projected line' of the stub axle onto the ground  
must fall ahead of the tyre contact patch centre.  Think of a shopping  
trolley - it's the (huge) castor which makes the wheels swivel back in  
line.  This is all castor is for; it provides self-centering to the  
steering. Thus, if you had the castor angle the 'wrong' way round,  
your steering would continually seek to move away from the centre.

Richard Atkinson

On 5 Feb 2008, at 05:25, Mal Clark wrote:

> Hi everyone,is there someone out there that can help me quickley I  
> have had my Alpine at the Front end aligners,and supplied the   
> measurement figures to them according to the Workshop manual, the  
> CASTOR angle measurement state 3 degrees.but doesnt say wether  
> Negative or Positive,my man has been trying to obtain,the 3 degrees  
> positive,and cant get there,he thinks in the early days of our cars  
> maybe everyone knew the measurement was  3degrees Neg, thats maybe  
> why the workshop manual doesn't state which.,can someone tell me the  
> correct CASTOR for the Alpine, HELP,   Mal Clark.
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