Qualitative Analysis of Surface Modification on Wiffleball Aerodynamics

Author

Cole LanniFollow

College

College of Engineering and Polymer Science

Date of Last Revision

2025-04-29 12:39:31

Major

Chemical Engineering

Honors Course

CHE 497-001

Number of Credits

3

Degree Name

Bachelor of Science

Date of Expected Graduation

Spring 2025

Abstract

This project investigated how surface modifications to a Wiffleball affect its aerodynamic behavior, particularly its vertical and horizontal movement when thrown. The study tested the hypothesis that altering surface texture through cutting or sanding would influence airflow and pressure differentials, thereby changing the ball's movement. Six ball conditions: including unmodified, sanded, and various cut patterns were tested using a pitching machine in a controlled indoor environment. Each variation was pitched ten times, and movement was analyzed through measurements of contact points on posterboards and performing statistical testing, specifically ANOVA with Post Hoc analysis. Results indicated that surface modifications significantly increased vertical movement, with the 6x6 grid pattern side-cut ball showing the greatest drop. Horizontal movement differences were less defined, but the modifications caused many of the balls, especially the 2x2 flat cut grid pattern, to have a more consistent movement profile. These findings validate anecdotal techniques used in competitive Wiffleball and demonstrate the significant aerodynamic effects of surface alterations. This study combined science with real-world sport strategies, offering a unique perspective of fluid mechanics. Future research into the topic could allow for exploration of additional variables such as exact angle and spacing of the cuts to further optimize performance-based modifications.

Research Sponsor

Bi-min Zhang Newby

First Reader

Nic Leipzig

Second Reader

Chris Sarnowski

Honors Faculty Advisor

Bi-min Zhang Newby

Proprietary and/or Confidential Information

No

Recommended Citation

Lanni, Cole, "Qualitative Analysis of Surface Modification on Wiffleball Aerodynamics" (2025). Williams Honors College, Honors Research Projects. 1992.
https://ideaexchange.uakron.edu/honors_research_projects/1992