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Deflection due to Magnus Force

Last modified by
on
Jul 24, 2020, 6:28:07 PM
Created by
on
Aug 15, 2015, 1:16:07 AM
`d = ( "K_2" * "L" ^2 * omega ) / 2 * "m" * "v" `
`"Mass Parameter"`
`"Travel Distance"`
`"Spin Rate"`
`"Mass"`
`"Velocity"`
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34f3b069-42eb-11e5-a3bb-bc764e2038f2

This equation computes the displacement of an object in flight due to the Magnus force on a spinning object (such as a football, baseball, or soccer ball).

The effect of the Magnus force is commonly observed when a spinning ball (or cylinder) curves away from its flight trajectory. It is important in its use with sports balls to effect a curve over the course of the ball's flight and it must be considered in the trajectory of a spinning missile.1 

Examples

For a typical curve ball thrown by a professional baseball player, we might use the following as inputs:

  • (mass) = 0.145 kg
  • L (distance from pitcher to plate) = 18 m
  • `omega` (spin rate) = 2000 rpm
  • K (mass parameter) = 5.5 x 10-4 kg

and for this baseball curve example the deflection distance will be approximately d = 0.57 m2

See also

  1. ^ https://en.wikipedia.org/wiki/Magnus_effect
  2. ^ On the Flight of the American Football (physics.fullerton.edu/heidi/PROJECTS/football.pdf)

This equation, Deflection due to Magnus Force, is used in 2 pages
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