Tag Archives: Roll Centre

Steering Axis Inclination

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Steering Axis Inclination (SAI)┬áis also known as King Pin Inclination (KPI). The ‘Steering Axis’ is the axis around which the wheel assembly swivels as it turns to the right or left. It’s formed by drawing a line through the upper…

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Slip Angle

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Even though the name uses the word “slip”, this characteristic has nothing to do with slipping or skidding. Slip angle is the angular difference between the direction of the tyres’ contact patch with the road and the direction of the…

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Roll Centre

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A line is projected from the ground contact patch, at the contact point of the Steering Axis Inclination, through the wanted Roll Centre and to the Instant Roll Centre located at the desired Swing Arm Radius (fvsa) length distance from…

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Bump Steer

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‘Bump Steer’ is where the car steers without the drivers involvement due to hitting a bump in the road surface. The front wheels toe-in or toe-out, as the suspension compresses to absorb the bump. Bump steer can affect handling much…

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Glossary

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There are loads of terms that are used to describe suspension and car technology: Ackermann Camber Caster Roll Centre Scrub Scrub Radius Slip Steering Axis Inclination (SAI) / Kingpin Inclination (KPI) Toe in / Toe Out So why are they…

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Haynes Roadster Steering Rack

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The Ford Escort MK II steering rack has been finally fitted and the job turned out to be a very easy one.

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Locost Haynes Roadster Anti-Roll Bar

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What size anti-roll bar do I need? Can I just use a front one or do I need a rear one too? Do the stop understeer? What about using stiffer springs or different suspension geometry?

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Anti Dive Geometry

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As a vehicle brakes, the front has a tendency to dive. This can cause the car to become unpredictable and therefore it is important to minimise this effect. Anti-Dive geometry will limit the front end dive giving the driver greater confidence.

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Kit Car Adjustable A Arm Suspension

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Kit Car Adjustable Suspension has always been a compromise, but this design employs polyurethane joints, clevis and rose-joints to achieve complete camber and caster compensation.

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