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A Brake Thought expiriment

 
Old 10-15-2017, 08:19 PM
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Default A Brake Thought Experiment

I wonder.... What if the brake rotor turned the opposite direction of the wheel it was stopping? Forgret about the how and weather or not practical or impractical, What would the physical effect be on the car? What about it Miataturbo intellect collective?

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Old 10-15-2017, 08:44 PM
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"experiment" ****, it won't edit.
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Old 10-15-2017, 11:19 PM
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Originally Posted by fivehundredton View Post
"experiment" ****, it won't edit.
I think that's the least of your worries.
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Old 10-16-2017, 12:56 AM
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There's a motorcycle wheel prototype (afaik) that did this. It stops the gyroscopic effect of tilting a spinning wheel (I think). Don't think it would apply to cars much
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Old 10-16-2017, 12:57 AM
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Old 10-16-2017, 07:03 AM
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Yep. I saw that. I was thinking more in terms of grip. If you did this on the front, you would still have weight transfer to front, but would torque press rear end down?

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Old 10-16-2017, 07:05 AM
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Originally Posted by ridethecliche View Post
I think that's the least of your worries.
You don't know the half of it, Slick.
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Old 10-16-2017, 07:14 AM
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I believe dynamic weight shift and aero have a far bigger influence on gripping/pushing the rear down
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Old 10-18-2017, 06:10 PM
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I agree ^. Just a musing that lost me some cats I bet it would be really screwy cornering.
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Old 10-19-2017, 06:46 AM
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Curly, thanks. I misread that the first time I saw it. They don't counter each other.
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Old 10-19-2017, 10:08 AM
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Gyroscopic forces only act at a right angle to the vectors for angular momentum (sticking straight out from the axle towards the left side of the car, when moving forwards) and to the vector for the torque applied to the wheel. When traveling in a straight line, this is zero (no gyroscopic force). When making a left turn it would tend to push the wheel down, but a right turn would lift the wheel. However, these are central forces and so might change the spring compression a tiny bit, but should not dramatically affect the handling since contact force with the road would be conserved, I believe. I'll think about this some more. Still, a rotating rotor would not have nearly as much rotational inertia as the wheel, so while diminishing these (possibly irrelevant) dynamic effects somewhat, they would have even more limited effects on the car overall.
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Old 10-19-2017, 05:47 PM
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I appreciate your input. Not gyro effect I'm looking at. Here's an example: While watching my son go over jumps on his dirt bike, I noticed that the bike would pitch nose down in the air sharply sometimes. When I asked him how in the hell he was doing that, he said he was hitting the back brake. Torque. When you clamp a disc, whatever your clamping it with, wants to go around too.
(Thanks for throwing some of my cats back over the fence, ya'll)
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