Handedness reversal of helical hydrodynamic resistance
= Handedness reversal of helical hydrodynamic resistance
{title2=$B\mapsto-B,\quad A,D\text{ unchanged}$}
Mirroring the handedness of a <helix> reverses its axial translation-rotation coupling coefficients while preserving its pure translation and rotation resistances. With $\mathbf t=\cos\theta\mathbf e_z-\sin\theta\mathbf e_\varphi$ for a left-handed <helix> and the force-on-body convention, $B=C=\ell a(\xi_\perp-\xi_\parallel)\sin\theta\cos\theta$.