An experimental study of new rule javelins

This paper presents a comparative study of three new rule javelins (800 g) used in elite competitions. Wind tunnel experiments were conducted on three commercially manufactured javelins (Hart Sports, Nordic Master 60 and Nordic Airglider) to investigate their aerodynamic characteristics. The aerodynamic drag, lift and pitching moment were measured over a range of wind speeds (25 to 33 m/s) for a range of angles of attack from 0 to 35 degree relative to the wind direction. The results suggest that the optimal release angles for each of the javelins are different due to their physical design. The angles of attack for highest lift-to-drag ratio for Hart Sports, Nordic Master 60 and Nordic Airglider javelins were found at 15°, 25° and 30° respectively. The findings of this study also indicate that Airglider javelin has better pitching moment stability than other two javelins.
© Copyright 2013 Procedia Engineering. Elsevier. All rights reserved.

Subjects: javelin throw experiment investigation method aerodynamics sports equipment angel
Notations: technical and natural sciences strength and speed sports sports facilities and sports equipment
DOI: 10.1016/j.proeng.2013.07.076
Published in: Procedia Engineering
Published: 2013
Volume: 60
Pages: 485-490
Document types: article
Language: English
Level: advanced