Surface evolver file:
twister.fe
Data from SE:
For each set of simulated data on each of figures 4 to 6, there is a separate file, with file name containing by the figure number, the value of $T$ and the value of $B$. Each line is a critical value of the PB length $\ell$ and/or the twist angle $\theta$. This is the last line of data from a sequence of increasing $\ell$ or $\theta$, just before the instability occurs. Each file has five columns, giving (i) the value of $T$, (ii) the value of $B$, (iii) the PB length $\ell$, (iv) the twist angle $\theta$, (v) the total surface area of the vanes.