Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/56887
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Mechanics of flight in ski jumping: aerodynamic stability in pitch
Author: Marques-Bruna, P.
Grimshaw, P.
Citation: Sports Technology, 2009; 2(1-2):24-31
Publisher: Taylor & Francis
Issue Date: 2009
ISSN: 1934-6182
2151-2221
Statement of
Responsibility: 
Pascual Marques-Bruna and Paul Grimshaw
Abstract: This study examines aerodynamic stability in pitch in ski jumping. Static stability implies automatic return to trimmed flight after a sudden disturbance and dynamic stability involves gradual damping of oscillatory motion. Both have implications for flight control and safety. A 3‐D inertia model of a ski jumper and the Planica K185 jumping hill profile were constructed using computer‐aided design. Inertia, jump performance, and aerodynamic efficiency and stability parameters were computed for variations in V‐style posture using mathematical modeling. Pitching moment at a 01 angle of attack was positive, and the condition dM/dα <0 at equilibrium was satisfied, indicating that the athlete is inherently stable. Enhanced flight posture consists of a ski‐opening angle of 301 and a forward‐leaning angle of 101. This is a high‐lift configuration with a large static margin that triggers a steep dM/dα slope and high oscillatory frequency upon deviations from trimmed attitude. Mechanisms of stability in pitch are proposed, founded upon theoretical aerodynamics.
Keywords: aerodynamics
computer-aided design
modeling
ski jumping
stability
Rights: Rights managed by Taylor & Francis
DOI: 10.1080/19346182.2009.9648495
Appears in Collections:Aurora harvest 5
Mechanical Engineering publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.