How did Britain obtain enough silk to make so many parachutes that were presumably discarded during landing?
In the 1930s, raw silk was used to manufacture parachutes. This was not difficult at all, as almost all silk came from Japan, which was the main supplier. However, with the outbreak of World War II, that supply quickly ceased. Meanwhile, Britain was trying to build a powerful ground force and needed materials to make parachutes.
Thus, the government made a difficult decision. Silk products such as socks and dresses were excluded from civilian use and all were given to the military. However, even this was apparently not enough.
Various materials were tested at the factory. Cotton was used first, but it was found to be difficult to handle and quickly absorbed water. There was even a possibility that it would rot. Next, rayon, so-called "fake silk," was tested. It looked promising, but it lacked strength. Also, there was a possibility that it would tear during high-speed parachute jumps.
It had no effect whatsoever.
Then nylon appeared. This was a new material developed by DuPont in their laboratory. It was lightweight, strong, waterproof, and had the characteristics of not tearing even when stretched.
However, no one was completely convinced. It was never actually used in combat jumps.
On June 6, 1942, Adeline Gray tested the performance of a nylon parachute by jumping from an airplane. The results were perfect.
That single jump dramatically changed the situation. This led to nylon becoming the primary material for war parachutes.
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