Planar wave. Evolution of flagellum (translated and rotated to the horizontal axis) for |$t=14$|s to |$15$|s, spatial units shown are in microns. No-coupling (No Ca, top row), asymmetric coupling (Ca asym, bottom row), bending and twist moduli as in Table 1 (left), moduli reduced by a factor of |$5$| (centre) and moduli reduced by a factor of |$10$| (right). The black circle at the origin denotes the first point on the flagellum.