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??

Re: Castor angle
 

Yes, the arc tangent of 1.5/12 is 7.13 degrees.

Re: Castor angle
 

Great, Thanks. Should be good.

Re: Castor angle
 

Just by a angled scaled magnetic protractor from your local lumberyard and stick it to the axle and read the °’s

Re: Castor angle
 

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.

Re: Castor angle
 

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..

Re: Castor angle
 

You may want to rethink that.

Re: Castor angle
 

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

Re: Castor angle
 

It's like a shopping trolley ...
https://www.youtube.com/watch?v=Gh7gWJAvOvs

Re: Castor angle
 

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.