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Old 10-09-2019, 02:33 PM   #1
Leatherback 57
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Default 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??
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Old 10-09-2019, 02:55 PM   #2
Roger Green
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Default Re: Castor angle

Yes, the arc tangent of 1.5/12 is 7.13 degrees.
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Old 10-09-2019, 04:55 PM   #3
Leatherback 57
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Great, Thanks. Should be good.
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Old 10-09-2019, 05:48 PM   #4
Chuck Sea/Tac
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Default Re: Castor angle

Just by a angled scaled magnetic protractor from your local lumberyard and stick it to the axle and read the ’s
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Old 10-10-2019, 03:25 PM   #5
Patrick L.
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Default Re: Castor angle

7 of caster is quite a bit. They are originally set for 5 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.
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Old 10-10-2019, 10:13 PM   #6
Railcarmover
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Default Re: Castor angle

Quote:
Originally Posted by Patrick L. View Post
7 of caster is quite a bit. They are originally set for 5 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..
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Old 10-10-2019, 10:33 PM   #7
Pete
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Default Re: Castor angle

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Originally Posted by Railcarmover View Post
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..
You may want to rethink that.
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Old 10-11-2019, 12:41 AM   #8
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Default 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
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Old 10-11-2019, 01:15 AM   #9
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Default Re: Castor angle

It's like a shopping trolley ...
https://www.youtube.com/watch?v=Gh7gWJAvOvs
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Old 10-12-2019, 04:10 PM   #10
duke36
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Default 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.
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