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steering geometry |
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Brucey
BHPC Member Joined: 11 September 2019 Status: Offline Points: 14 |
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Posted: 11 September 2019 at 4:37pm |
went a bit OT in the 2019 battle mountain thread. Found the illustration below, but does anyone have comparable data for bicycle tyres? |
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GeoffBird
BHPC Member Joined: 20 September 2005 Status: Offline Points: 2397 |
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I think that is called 'tyre cornering stiffness'. Bicycle tyres aren't designed to take lateral loads so tyre manufacturers are unlikely to have data. I don't know of any tests by HPV enthusiasts.
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Right Time - Right Place - Wrong Speed
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Brucey
BHPC Member Joined: 11 September 2019 Status: Offline Points: 14 |
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it occurs to me that even if you did take the above into account and therefore obtain the highest lateral force, when riding an HPV this still might not be fastest way round the circuit. The reason for this is that you don't have unlimited amounts of power available, so if you increase lateral grip by 1% but it comes at a cost of a similar percentage increase in drag (which it might if you are exploiting a high slip angle), it might end up being a net loss, vs using that energy at some other point around the circuit. Of course if the choice is braking into a turn a bit less, a higher cornering speed is more of a no-brainer, but if you end up pedalling through turns any drag increase isn't such a good idea. cheers
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GeoffBird
BHPC Member Joined: 20 September 2005 Status: Offline Points: 2397 |
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Yes, this is why Chris told me that maintaining Ackermann geometry is important. Rolling resistance is very bad when you have 0.25 bhp!
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Right Time - Right Place - Wrong Speed
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