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23 Dec 2003, 16:24 (Ref:819106) | #26 | ||
Racer
Join Date: Aug 2000
Posts: 374
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Best suspension book is Race Car Vehicle Dynamics by Milliken/Milliken.
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"If you can leave black marks from the time you exit a corner till the time you brake for the next turn, then you have enough horsepower." --Mark Donohue Colin McRae 1968-2007 |
6 Jan 2004, 21:02 (Ref:829836) | #27 | |
Racer
Join Date: Jan 2002
Posts: 127
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A better way to explain allofthis would be to quote roll gradients. Roll gradient, measured in deg/G, and is the amount the car rolls(deg) per 'G' of lateral acceleeration. this will take into account the total roll stiffness of the car, inclding; tyre stiffness, spring stiffness, damper stiffness (you'll be amazed at the amount of people who don't consider the damper in their calculations, it takes force to compress it......) roll bars etc
typical values are: F1<1 Sportscars approx 1.5 High performance roadcars would be about 3-4 monoshock equipped cars are probably a lot less than 1 Last edited by Kid Prozac; 6 Jan 2004 at 21:03. |
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10 Mar 2004, 09:43 (Ref:900599) | #28 | ||
Racer
Join Date: Jan 2002
Posts: 127
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Quote:
As well as that, other highly recommended reading is: Fundamentals of Vehicle Dynamics - Thomas Gillespie Tyres Suspension and HAndling - Jon Dixon Tyre and Vehicle Dynamics - Hans Pacejka Another excellent read is: SAE Paper 662536 - A Force Based Roll Center Model For Vehicle Suspensions Which intorduces the concept of force based roll centres, a much more accurate way of calculating a roll centre position than the kinematic method as delat with in most books. Bear in mind though that any calculactions you perform are only as good as the tyre model you have. |
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