By Seares F. H.
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Additional resources for A Notation for use in the Discussion of Star Colors(en)(2s)
If the bike was leaning over at 45° then for a normal size tyre the horizontal radius to the cone axis would be approximately 450 mm, an impossibly tight turn. However, we’ve seen before that Conservation of Momentum will want to make the bike go straight which tends to work against this desire to turn about the effective cone centre, these conflicting effects will form a balance where the actual corner radius described is considerably greater than the cone radius. , that would mean that the lateral acceleration required at 100 km/h would be 175 g, or in other words the tyre coefficient of friction would have to be 175.
With no tyre the wheel would then be subject to an average vertical acceleration of approximately 1000 G. (the peak value would be higher than this). This means than if the wheel and brake assembly had a mass of 25 kg. then the average point load on the rim would be 245 kN. (about 25 tons). What wheel could stand that? If the wheel was shod with a normal tyre, then this would have at ground level, an initial spring rate, to a sharp edge, of approx. , but rising as the tyre wraps around the step.
025 metre high step. Note that the time scales vary from graph to graph, to highlight the most significant features. To keep the graphs as uncluttered as possible it is assumed that both wheels hit the step at the same time. Three cases are considered: • With typical vertical tyre stiffness and typical suspension springing and damping. • With identical tyre properties but with a suspension spring rate of 100 X that of the previous. • With tyre stiffness 100 X the above and with normal suspension springing.