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Maximum Football axis_1 or axis _2 - NCAA

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Jul 24, 2020, 6:28:07 PM
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Aug 7, 2015, 1:23:31 PM
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This constant represents the NCAA's maximum short axis length corresponding to the circumference of a football and is defined by relationship between diameter and circumference to to be no greater than approximately 3.382 inches.1

Remember: "Circumference" = pi * "Diameter" = pi * 2 * b = pi * 2 * c =>

b_"max" = c_"max" ="Circumference"_"max"/(2*pi)

/attachments/7f9dbd27-3d07-11e5-a3bb-bc764e2038f2/Official Footbal axes 1 or 2.png

Since we can approximate the football with an ellipsoid, the circumference through the plane of the "axis"_1' and "axis"_2' is related to b or c as:  C = pi * (2 * b)

/attachments/7f9dbd27-3d07-11e5-a3bb-bc764e2038f2/Ellipsoid.png

See also

  1. ^ 2015 NCAA Football Rules and Interpretations

This equation, Maximum Football axis_1 or axis _2 - NCAA, references 3 pages
This equation, Maximum Football axis_1 or axis _2 - NCAA, is used in 3 pages
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