Benonymous
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| posted on 3/8/09 at 04:04 AM |
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Nice simple explaination of Ackerman angles
This is an RC car web site but I found the diagrams and animations really easy to understand. I especially like the fact that the writer has gone to
the trouble of illustrating how to calculate Ackerman and a toe-in, toe-out version.
http://www.rctek.com/technical/handling/ackerman_steering_principle.html
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907
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| posted on 3/8/09 at 06:54 AM |
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My first recollection of Ackerman was in 1965, when I was 10.
I had an Airfix slot car set for Christmas as it was cheaper than Scalextric. (Times were hard  )
A Vanwall and a shark nose Ferrari.
It said on the box "Full Ackerman Steering" and I had to get my older brother to explain it to me.
Cheers
Paul G
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LBMEFM
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| posted on 3/8/09 at 07:11 AM |
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and.........................................
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britishtrident
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| posted on 3/8/09 at 07:39 AM |
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The bit no website or book will tell you is true Ackerman geometry can't be applied to rack and pinion steering.
Classical Ackerman only works where the steering uses a centre track rod --- ie a lorry style beam axle or a 1950's style suspension with a
steering box and idler arm.
To get an ackerman effect ( toe-out on turns ) on a book style Locost style chassis the steering rack positioning of the donor Ford should be
copied, that is the centre line of the steering rack set a few inches to the rear of an imaginary line joining the centres of the outer track rod
ends.
[Edited on 3/8/09 by britishtrident]
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