Ball size?

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Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 3/15/2000 2:59 PM MST


In Reply to: Ball size? posted by Greg Mills on 3/15/2000 1:58 PM MST:



It is our considered opinion that the balls (I use the term loosely) were not within spec.

We never really challenged any for their size.

Mostly we just learned to live with them.

I would not count on the balls being any smaller or any rounder at the Nationals than they were at GLR or at KSC.

Joe J.

P.S. I heard some folks at FIRST talking about a BOX that they used to inflate the balls to the right size. I may have missed something, but I don't recall a box being discussed in the regulations. It was my impression that diameter was the gauge rather than the smallest square that could contain the equator of the ball.

P.P.S I very much recommend that FIRST use circumference along the equator as the measure of a good ball. To my mind it is much easier to measure and it is also more repeatable than diameter which is not really well defined on a ball with a non-circular section through its equator. Just my opinion.