[Staowners] FRONT END ALIGNMENT

[Mal Clark]

Richard.thanks for reply,you description,seems to be correct,that would mean the top of the king pin,has to lay back from the upright,meaning a positive degree. thanks again,Mal Clark.
  ----- Original Message ----- 
  From: Richard Atkinson 
  To: Mal Clark 
  Cc: Staowners at sunbeamtalbot.info 
  Sent: Tuesday, February 05, 2008 8:52 PM
  Subject: Re: [Staowners] FRONT END ALIGNMENT


  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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