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Old 01-07-2015, 07:40 PM   #141
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Dude try and get laid instead of writing a dissertation on motohouston. Forget the part where I read it all.
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Old 01-07-2015, 08:00 PM   #142
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Your source is a "reasonable assumption".

"Have you ever heard someone say, you go fast in the fast corners and slow in the slow corners..... because that is where you make up the most time."

This is very incorrect.

That statement refers to not going fast in the slow corners because when you do, it increases your lap time. Going fast in a slow corner either causes the bike to push (understeer) or oversteer. In either case, it results in the rider having to reduce speed to correct the path of the bike through the turn.

Where do you come up with your theories?
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Old 01-07-2015, 08:04 PM   #143
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This is where I've gotten my information...

BF512D73 90B9 464B 9831 5E65F0711E1F zpsnxu8z8i5
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Old 01-07-2015, 08:47 PM   #144
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Old 01-07-2015, 09:03 PM   #145
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Old 01-07-2015, 09:12 PM   #146
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He's right about lean angle. Arctan of lateral g's equals lean angle on a motorcycle.
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Old 01-07-2015, 09:20 PM   #147
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Old 01-07-2015, 09:30 PM   #148
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Equals is broadly accepted as a good approximation in virtually every motorcycle chassis tuning and data acquisition book. The angle is measure from the contact patch to the center of mass of the combined rider and bike.

http://www.datamc.org/2014/01/26/cor...nd-lean-angle/

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Old 01-07-2015, 09:35 PM   #149
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Old 01-07-2015, 09:47 PM   #150
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All kinds of interesting information here
http://www.stevemunden.com/leanangle.html

As I stated earlier:

"The actual lean angle must be measured from the center of mass to the center of the contact area, which will be to the inside of the tire."

Other interesting tidbits:

"BMW's S1000RR sportbike has a traction-control mechanism which measures lean angle and restricts power when the angle exceeds a predetermined limit. Rain mode allows 38 degrees of lean, corresponding to a coefficient of friction of .78; sport mode allows 45 degrees, μ = 1; race mode allows 48 degrees, μ = 1.1; and slick mode gives 53 degrees, μ = 1.3"

And

"Sometimes the motorcycle tire makers will give a maximum lean angle for a particular tire. For instance, in May 2009 Michelin claims a maximum lean angle of 50.6 degrees on dry pavement and 41.9 degrees on wet pavement "as measured at the Michelin test track" for their Pilot Power sportbike tires. One might guess that the Michelin test track's pavement has less sand and better maintenance than standard street pavement, but that's purely a guess. In any case, that gives a coefficient of friction of 1.2 on dry pavement and .90 on wet pavement. "
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Old 01-07-2015, 10:28 PM   #151
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Originally Posted by Sudo View Post
Equal is quite off. Its just an estimation that assumes static center mass, zero external resistance and infinite traction.

The post was too long. Didnt read. Not even sure what point is he trying to make anymore.
How does it assume any of that? If you're centor of mass changes your lean angle changes and lateral g's will change. It also doesn't assume infinite traction, not sure how you get that. Sure it can be used to calculate passed what is possible but that doesn't mean it isn't valid when the grip is available. I guess a cross wind will affect it though.
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Old 01-07-2015, 11:31 PM   #152
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Old 01-08-2015, 10:08 AM   #153
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Well this escalated quickly...
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Old 01-09-2015, 07:36 PM   #154
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And it will end just a quickly..

Though I will say I like the book collection. Especially that one on the nights sky, almost a bit ironic to see that one.

But the last point was just a simple exercise to relate to speed and radius of a turn with lateral g' or lean angle which ever way you want to think about it.

Again apperently it was perhaps a bit too much to give you guys any real information that could actually useful to someone.

And the website link talking about estimating friction, he is not taking into account the total weight acting on the tire, which would be the vector product of the lateral force and weight.
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Old 01-09-2015, 08:47 PM   #155
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Adele Dazeems new hit, "let it die"
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Old 01-09-2015, 10:44 PM   #156
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Accurate information is always appreciated.
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Old 01-10-2015, 12:57 AM   #157
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We have been beating a very dead horse for a few pages now.
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Old 01-10-2015, 04:47 PM   #158
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Then just put down the sticks.

This started with simple enough questions. I have given my answers, showed how I got them, how someone else could do the same, and given examples of how it could be applied.

With the exemption of a few, no attempt has been made to add value to the conversation or to do the same.

Most contributions are to beat down what has been said when someone else does. So I can understand why you may be tired.
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Old 01-10-2015, 08:16 PM   #159
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I learned something, just didn't quite agree with some of your statements. Once we got on the same page it's all good.
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