Castor angle

Does anyone have a formula for castor measurements . Les Andrews book says at 11in difference of 1in is . 09 or 5.1deg.
Mine is at 12in and a difference if 1.5 in or 0.125
I'm thinking around 7degrees??
 
Just by a angled scaled magnetic protractor from your local lumberyard and stick it to the axle and read the °’s
 
7º of caster is quite a bit. They are originally set for 5º which is still quite a bit.
The car will still probably track well at speed, but, the steering wheel probably will not want to return very well on its own during a slow turn.
 
7º of caster is quite a bit. They are originally set for 5º which is still quite a bit.
The car will still probably track well at speed, but, the steering wheel probably will not want to return very well on its own during a slow turn.

its an old hotrodder trick,the more caster or king pin inclination the less steering effort you have,add enough it will feel like power steering,till it dives into a turn..
 
Hmm. The action of caster lifts the sprung weight up as the wheels turn if I am not mistaken. I often am!!
This should give heavier steering and more self-centreing action,
SAJ in NZ
 
5 deg.measured per post 4 at the axle ends next to the king pins. The axle in the middle may be different due to age, etc.
 
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