The initial Scottish Fold was a white barn cat named Susie, who was uncovered in a farm near Coupar Angus in Perthshire, Scotland, in 1961. Susie's ears had an abnormal fold in their middle, earning her resemble an owl. When Susie experienced kittens, two of these have been born with folded

The S-IVB also ongoing to thrust at a lower stage by venting gaseous hydrogen, to help keep propellants settled inside their tanks and stop gaseous cavities from forming in propellant feed traces. This venting also preserved Risk-free pressures as liquid hydrogen boiled off while in the gas tank