A sit-ski design aimed at controlling centre of mass and inertia.
J Sports Sci
; 31(10): 1064-73, 2013.
Article
em En
| MEDLINE
| ID: mdl-23383968
ABSTRACT
This article introduces a sit-ski developed for the Canadian Alpine Ski Team in view of the Vancouver 2010 Paralympic games. The design is predominantly based on controlling the mass distribution of the sit-ski, a critical factor in skiing performance and control. Both the antero-posterior location of the centre of mass and the sit-ski moment of inertia were addressed in our design. Our design provides means to adjust the antero-posterior centre of mass location of a sit-ski to compensate for masses that would tend to move the antero-posterior centre of mass location away from the midline of the binding area along the ski axis. The adjustment range provided is as large as 140 mm, thereby providing sufficient adaptability for most situations. The suspension mechanism selected is a four-bar linkage optimised to limit antero-posterior seat movement, due to suspension compression, to 7 mm maximum. This is about 5% of the maximum antero-posterior centre of mass control capacity (151 mm) of a human participant. Foot rest inclination was included in the design to modify the sit-ski inertia by as much as 11%. Together, these mass adjustment features were shown to drastically help athletes' skiing performance.
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Base de dados:
MEDLINE
Assunto principal:
Postura
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Esqui
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Pessoas com Deficiência
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Equipamentos Esportivos
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Desempenho Atlético
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Movimento
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article