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Unread 14-02-2008, 11:17
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Re: Drivetrain Reference Tables - 2008

The coefficient of friction is important if you have the wheels slipping on the floor...usually that is not a problem if you limit your acceleration, and the floor is not extremely slippery.

Any piece of short nap carpet should be fine for testing. The carpet on our high school hallways is very similar to the carpet on the competition fields.
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Re: Drivetrain Reference Tables - 2008

The CoF that IFI provides are
Wedgetop: 1.2 and 0.00905 pounds / Sq Inch
Roughtop: 1.3 and 0.01025 pounds / Sq Inch

AndyMark (http://www.andymark.biz)provides detail for his product on it's individual pages
The kit wheels provided by them are
Tangental skidding resistance: 0.65
Resistance from a sideways push: 0.9

As far as laying out auton goes... I am assuming that you are running open loop, so you may want to check out JVN's earlier tools http://www.chiefdelphi.com/media/papers/1676
Specifically the gearbox modeling sheet. The Position versus Time plot should get you pretty close for straight line driving.

Since you don't have carpet to test on are you sure you can turn???

-----------------
I wish I had a dollar for every time I recommended that spreadsheet... Great piece of work John.
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