The Iwatobi Festival has begun! Haruka and friends are fired up for the Club-versus-Club Relay Race, hoping to attract new members by putting in an impressive performance. Meanwhile, Rei begins training but is worried by the fact that he can still only swim the butterfly stroke…
and a roughly V-shaped kickboard, 
the optimal arm angle
V ولوح سباحة بشكل حرف  
،زاوية الذراع المثلى
Der optimale Armwinkel zur Annahme 
des V-förmigen Trittbretts
El ángulo óptimo del brazo 
para recibir el flotador en "V"
El ángulo óptimo del brazo 
para recibir el flotador en "V"
l’angle formé par le bras
pour recevoir la planche
e contando la forma a V della tavoletta ruvida,
O ângulo adequado do braço para 
receber uma prancha com forma de "V"
доска примерно V-образная,
оптимальный угол