On the Aerodynamic Forces on a Baseball, With Applications

Santos, Gerardo J. Escalera; Aguirre-López, Mario A.; Díaz-Hernández, Orlando; Hueyotl-Zahuantitla, F.; Morales-Castillo, Javier; Almaguer, F-Javier

doi:10.3389/fams.2018.00066

Cited by 5 publications

(3 citation statements)

References 44 publications

(110 reference statements)

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“…The way the ball spins through the air also branches into two symmetrically distinct subtypes due to the direction degrees of the seam, which applies to whatever type of pitch in principle. Ball motion studies show that the effect of the seam orientation becomes pronounced and detectable when the spinning rate is low, as in knuckleballs (Escalera Santos et al, 2019) and seam shifted wakes (Smith & Smith, 2021), and so it may be for the effect of the seam direction.…”

Section: The Symmetry Analysis Of a Baseballmentioning

confidence: 99%

“…Players mainly pay attention to the seam orientation but not to the seam direction when gripping a baseball (Nagami et al, 2015). In the author's survey, scientists also have left out the seam direction from consideration in the studies of aerodynamics (Alaways & Hubbard, 2001; Borg & Morrissey, 2014; Cross, 2012; Escalera Santos et al, 2019; Higuchi & Kiura, 2012; Kensrud et al, 2015; Nathan, 2008; Smith & Smith, 2021; Whiteside et al, 2016a) and pitching mechanics (Fleisig et al, 2009; Glanzer et al, 2021; Jinji et al, 2011; Kawamura et al, 2017; Kinoshita et al, 2017; Kusafuka et al, 2020; Manzi et al, 2021; Nagami et al, 2011; Nagami et al, 2015; Nasu & Kashino, 2021; Whiteside et al, 2016b), to mention a few. Even in a textbook exercise to describe the symmetry of a baseball, the seam direction is omitted (Blinder, 2004).…”

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confidence: 99%

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A new category of “Aha!” driven by touch: A grip sensation into the directional seam on a baseball

Ishida

2023

i-Perception

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We report an “Aha!” experience which differs from conventional Aha's studied over a century in psychological science. The Aha we introduce is driven by touch instead of the visual and verbal modalities widely studied to date. It can occur when gripping a baseball, with a simple input that the red seam on the ball has a direction. Aided by a symmetry analysis and subsequent survey over literature, we show how our mental and physical representation of a baseball can change suddenly by the seam direction and unravel the factors that make the tactile sense into a joyful-and-insightful sensation. Our study sets a new category of Aha driven by touch, opens a new path to investigate the role of touch in our cognition process, reveals the seam direction as a new degree of freedom in baseball aerodynamics and pitching mechanics, and deepens the insights into throwing a baseball from our fingertips.

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Section: The Symmetry Analysis Of a Baseballmentioning

confidence: 99%

mentioning

confidence: 99%

A new category of “Aha!” driven by touch: A grip sensation into the directional seam on a baseball

Ishida

2023

i-Perception

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“…Escalera Santos et al [7] have used experimental data and analysis to investigate the seam force in addition to the Magnus force contributing to the trajectory of a knuckleball. In recent work, Rooney et al [8] investigated the wake behind a baseball, including at spin rates consistent with a knuckleball.…”

Section: Introductionmentioning

confidence: 99%

Discrepancies between reported knuckleball spin rates and dynamics

Hoskins

2024

J. Phys.: Conf. Ser.

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Major League Baseball tracks every pitch of every game and provides the public with access to a significant amount of data for each pitch. This level of data availability is not seen in many other sports and offers substantial opportunities to provide analysis on the sport. Major League Baseball does not provide the raw data but provides refined data. While the algorithms for transforming the raw data are robust, the algorithms are not perfect. This study investigates the specific case of knuckleball pitches and shows that the equations of motion and reported spin rates do not align. This study uses the modified shooting method combined with the Levenberg–Marquardt algorithm to determine the trajectories of the pitches based on the provided data and known equations of motion. This study investigates three scenarios: 1) the reported data are correct; 2) the pitches are correctly identified, but the spin rates are incorrect; and 3) the spin rates are correct, but the pitches are incorrectly identified as knuckleballs. We show that the reported data are inconsistent with the equations of motion and that, based on statistical analysis, the pitch identification is likely incorrect.

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A review of the analysis of wind-influenced projectile motion in the presence of linear and nonlinear drag force

Lubarda

2022

Arch Appl Mech

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On the Aerodynamic Forces on a Baseball, With Applications

Cited by 5 publications

References 44 publications

A new category of “Aha!” driven by touch: A grip sensation into the directional seam on a baseball

A new category of “Aha!” driven by touch: A grip sensation into the directional seam on a baseball

Discrepancies between reported knuckleball spin rates and dynamics

A review of the analysis of wind-influenced projectile motion in the presence of linear and nonlinear drag force

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