Revista Brasileira de Ciências do Esporte
Print version ISSN 0101-3289
TREMEA, Victor Wigner; GOMES, Lara Elena and LOSS, Jefferson Fagundes. Description of the behavior of the kite's force in relation to its position and the displacement of the control bar. Rev. Bras. Ciênc. Esporte [online]. 2011, vol.33, n.3, pp.715-732. ISSN 0101-3289. http://dx.doi.org/10.1590/S0101-32892011000300013.
Introduction. During kitesurfing, the sailors propel themselves changing the kite´s attack angle in two ways: moving the kite in the wind window and moving the control bar. Objective. To describe the behavior of the kite's forces in relation to its position in the wind window and the distance traveled by the control bar. Methods. Videogrammetry and dynamometry were used. Two tests were performed: moving the control bar and moving the kite in the wind window. Results. The force increased while the bar was moved down. Moving the kite, the power zone was defined as the combination of vertical angles smaller than 60° with horizontal angles smaller than 20°. Conclusion. The force increases when the bar goes down. The vertical angle seems to be more important to the force values.
Keywords : Extreme sports; nautical sports; wind window; attack angle.