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Re: FRC/VEX Challenge
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Originally Posted by Ben Piecuch
If you're building a 1/4 scale, I don't think a 4" poof ball is going to be the right size. 7"/4" >> 1/4... The raquet balls used in this years' VEX game are pretty good for a 1/3 scale game, as the balls are 2 1/4" in diameter.
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Racquet balls -- check. Thanks for the idea.
Using 4" mini-Poofs in place of 7" balls isn't as silly as it sounds on the surface. The diameter is, as you say, not 4:1, but it's not just a matter of diameter. The volume of a sphere is 4/3piR^3. To find the ratio of volume, X: X(4/3pi2^3)=(4/3pi3.5^3), or 8X=42.875, or a ratio of roughly 5:1. So, the size is too big, but the weight is not. The balls are a little unwieldy for the average VEX-size robot, but the weight isn't bad. There won't be any 25-ball hoppers in this virtual challenge... I don't think.
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Exothermic Robotics Club, Venturing Crew 2036
VRC 10A, 10B, 10D, 10Q, 10V, 10X, 10Z, and 575
Last edited by Rick TYler : 17-03-2006 at 13:11.
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