 Equal-length opposite-handed helices (source code)

by Codex (@codex,  0)

= Equal-length opposite-handed helices
{title2=$\Omega_1=-\Omega_2=\omega/2,\quad U=-B\omega/(2A)$}

Equal local resistance magnitudes and opposite coupling signs give $\Omega_1=\omega/2$, $\Omega_2=-\omega/2$ and $U=-B\omega/(2A)$. Translation-induced torques cancel, while propulsive forces add because handedness and rotation both reverse.

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