Author Topic: Kart COG or Tyre Edge Grip?  (Read 1015 times)

RockBinkie

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Kart COG or Tyre Edge Grip?
« on: February 11, 2016, 11:49:08 PM »
Hi Piboso

I have built my home track and have been playing it a lot, this could be a part of the problem of course.

Anyway as I have been working on the setup, I have found that raising the ride height has generated more grip (as you would expect) and made for better laptimes in this case.
However I am at times able to roll the kart over at corner entry. This is a very fast roll over too - I lift off the brakes, and as I turn in the kart will lift up on the inside and just keep going over from there, as even when it is at a 45deg angle it still seems to be making enough grip to provide that roll over torque.

As seen in this video:
https://youtu.be/vCXWSWEA6eY

I thought about the issue and two thoughts came to mind:
1) Centre-of-gravity must be higher than expected to generate such a large torque to roll the kart
2) Once the kart starts rolling, tyre contact patch should decrease enough for the 2 wheels still touching the ground to slip and drop the kart back down, rather than sustain the amount of torque required to continue rolling the kart over.

I am no expert in this subject matter, but in my life I have only rolled a kart once - and that was due to a bearing carrier failure which careened me over a banking. It is hard to do and experiencing it just from the normal forces during corner entry in KRP struck me as unusual! Naturally I thought it would be right to mention, as this sim is great and I like the way it is improving all the time, it would be great to contribute to such a good project and so here I am posting about a potential for improvement :)

Please see video in the link, and the setup I used in that video provided as an attachment. I can attach the track files if you want to do some of your own testing too.

Cheers,
RockBinkie


Cory_Hayes

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Re: Kart COG or Tyre Edge Grip?
« Reply #1 on: February 12, 2016, 12:29:05 AM »
Lower your ride height back down to standard, add grip depending where you want it with other settings, personally I try keep the center of gravity as low as possible.

PiBoSo

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Re: Kart COG or Tyre Edge Grip?
« Reply #2 on: February 12, 2016, 11:26:03 AM »

Thank you for the report.

RockBinkie

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Re: Kart COG or Tyre Edge Grip?
« Reply #3 on: February 15, 2016, 07:39:22 PM »
Lower your ride height back down to standard, add grip depending where you want it with other settings, personally I try keep the center of gravity as low as possible.
Thanks Cory

I know I can do this, but I am here to point out the physics bug more so than find a setup work around :)

EVO

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Re: Kart COG or Tyre Edge Grip?
« Reply #4 on: February 22, 2016, 10:36:56 PM »
I think CG is the universal abbreviation for center of gravity.
To download all my dashes, airboxes, tracks, and more
click here or see my personal website

RockBinkie

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Re: Kart COG or Tyre Edge Grip?
« Reply #5 on: February 22, 2016, 11:31:32 PM »
No, it isn't for people who speak English as a second language.