Abstract

Volleyball is a sport that starts with a serve, so effective service is essential to win the game. The trajectory of the ball is complicatedly affected by the fluid force, which depends on the speed, spin speed, and panel shape. To understand the aerodynamic characteristics of the ball and to propose an ideal serve method, we measured the fluid force and flight trajectory. The fluid force applied to the ball was measured at a wind speed of 4–30 m/s in the wind tunnel. The fluid force on the ball was strongly dependent on the ball type and orientation of the panel. In the flight trajectory measurement, the trajectory of the ball was measured using a high-speed camera under controlled speed and spin speed using a shotting machine. The effect of the panel orientation shown by the fluid force measurement was consistent with the results of the trajectory analysis, clarifying the importance of the panel orientation in serving.

Highlights

  • Volleyball is a team sport in which a net separates two teams of six players

  • We perform the following two measurements for non-spinning floater serves to analyze how the flight behavior of volleyball is affected by the ball types and panel orientation

  • It became clear that the control of the speed and spin speed and the panel orientation when the ball flies greatly influence the variation of the flight trajectory and the landing point in the volleyball serve

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Summary

Introduction

Volleyball is a team sport in which a net separates two teams of six players. Each team tries to score points by grounding a ball on the other team’s court under organized rules. We perform the following two measurements for non-spinning floater serves to analyze how the flight behavior of volleyball is affected by the ball types and panel orientation. These balls differ greatly in the shape of the Proceedings 2020, 49, 146; doi:10.3390/proceedings2020049146 www.mdpi.com/journal/proceedings. In the same speed range as the serve released by humans, the changes in the path and landing point of the non-spinning ball are measured using a high-speed camera while changing the panel orientation and the type of balls

Wind Tunnel Experiment
Shotting Machine Experiment
Fluid Force Measurement
Shotting Experiment
Conclusions
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