Frictional Discrepancies

[Al Skierkiewicz]

Roughing wheel surface by driving on abrasive surfaces is already under discussion in inspection circles. Read R06 very carefully and watch the Q&A and Team Updates for anything that pertains to wheels. Conjecture in these fori is a personal opinion, the GDC is the official, last and final word.

[IKE]

Originally Posted by Al Skierkiewicz

Roughing wheel surface by driving on abrasive surfaces is already under discussion in inspection circles. Read R06 very carefully and watch the Q&A and Team Updates for anything that pertains to wheels. Conjecture in these fori is a personal opinion, the GDC is the official, last and final word.

If you get word on Policing procedure, that would be great. I know we are planning on buying extra wheels. Having practised drivers I feel will be really impoartant, and doing a full floor will cost around $2K. We have a large open smooth tile floor (like most HS cafeterias), but I am worried about picking up a little grit while pracitising.

[Peter Matteson]

Originally Posted by Al Skierkiewicz

Roughing wheel surface by driving on abrasive surfaces is already under discussion in inspection circles. Read R06 very carefully and watch the Q&A and Team Updates for anything that pertains to wheels. Conjecture in these fori is a personal opinion, the GDC is the official, last and final word.

I'm interested in how this comes out because I believe many teams will practice on carpet, tile or concrete floors because they can't afford a full field. This will leave many teams with interesting wear on their wheels when they get to their first regional.

Al, I don't envy the job of yourself or the other head inspectors this year.

[comphappy]

Originally Posted by Ozeaden

Just run the wheels on asphalt and run it down a bit. Its not against the rules at all.

This is what I am talking about, that is not the same as practicing on the cafeteria floor. If asphalt is all you have then so be it, but dont use it intentionally as an advantage i.e. "run it down a bit". As it says in the manual, think about the spirit of the rules.

[Andy Baker]

Originally Posted by Tristan Lall

There's an order of magnitude between the two sets of published figures (for the inline case, assuming that's how AndyMark tested them). This makes design difficult.

Any guesses as to which is accurate?

Originally Posted by StevenB

I think it's pretty clear that the AndyMark numbers are wrong.

OOOOPS! Sorry all. Our numbers that WERE posted on our website were wrong. I was hurrying through adding these websites, and I just erroneously missed a "0" in my number. 0.05 is correct for static friction. This was tested between the Rover Wheel and the playing field surface (not carpet).

Thanks for pointing this out, Tristan.

Andy Baker

<edit> ... by the way... if anyone catches something silly like this from me again, feel free to drop me a PM or email at "andyb AT andymark.biz". These days, I am fairly busy and don't always get to check this site.