Up until then, to create wind for a film shoot, productions used an aero engine on a dolly. This was so noisy that it was impossible to shoot sound at the same time.
Andrew designed quiet machines. Small ones to create the wind to move Superman’s cloak, and large ones, about 15ft. diameter, to create the background wind. The fans were run by electric and so comparatively quiet.
Christopher Reed, who played Superman, was up for anything, and so the precarious life on the wire with a fan in front of his face was no problem to him.
This was 1977, before Health & Safety was invented and anything goes....check out those `Loons` on Andrew.