A good shuttle, while not absolutely required to make cloth, is one of the most important tools for efficient weaving.
The operating principle is the same for the simplest stick shuttles and the heaviest industrial flying shuttles: the shuttle carries weft (or woof, or filling) thread back and forth through an arrangement of warp threads.
When you consider the back-and-forth motion of a shuttle on a conventional loom, it’s easy to see how the word came to be applied to any sort of relayed transportation device.
From Old English scytel (“dart, arrow”), from Proto-Germanic *skutilaz (compare Old Norse skutill (“harpoon”)), from *skut- (“project”) (see shoot). Name for loom weaving instrument, recorded from 1338, is from a sense of being “shot” across the threads. The back-and-forth imagery inspired the extension to “passenger trains” in 1895, aircraft in 1942, and spacecraft in 1969, as well as older terms such as shuttlecock. (Source: Wiktionary)
So the next time you hop on a shuttle bus, wherever you’re going, you can really think of yourself as part of the… fabric… of modern society.