Erratic Behavior of Forkball

• MIZOTA Taketo

  Fukuoka Institute of Technology

• KUBA Hiroyuki

  Graduate School of Engineering, Fukuoka Institute of Technology

• O-HARA Shinichiro

  Graduate School of Engineering, Fukuoka Institute of Technology

• OKAJIMA Atsushi

  Graduate School of Natural Science and Engineering, Kanazawa University

Bibliographic Information

Other Title

• フォークボールの不思議?
• フォークボール ノ フシギ シズム マキュウ フォークボール ノ クウキ リキ
• Aerodynamic Mechanism of Sinking Forkball
• 沈む魔球フォークボールの空気力学

Abstract

Aerodynamic behavior of forkball and fastball are studied in a stand point of fluid dynamic research. The fastball rotates in backspin and aerodynamic lift force acts on it is toward upward by Magnus effects. This lift force is the same magnitude with gravity force for good fastball. As a result, the fastball trajectory is nearly straight toward homebase after detaching pitcher's finger. The other hand, good forkball spins around vertical axis. In this case, less lift force and only the gravity force act on the ball. The flight trajectory of the forkball results in vertically sinking line only by the gravity force and laterally sliding one by side spinning effects in its final stage near the homebase.

Journal

• Wind Engineers, JAWE

  Wind Engineers, JAWE 1997 (70), 27-38, 1997

  Japan Association for Wind Engineering

Keywords

• Baseball aerodynamics
• Aerodynamic force
• Magnus effect
• Ball spin
• Forkball
• Fastball Wake

Details

• CRID: 1390282679618500352
• NII Article ID: 10002171485
• NII Book ID: AN10072785
• DOI: 10.5359/jawe.1997.27
• ISSN: 18838413
• ISSN: 09121935
• NDL BIB ID: 4118219
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4118219
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed