(p. 223) Kay’s flying shuttle made it possible for weavers to produce a wider product, which they called “broadloom,” but doing so was demanding. Weaving requires that the weft threads be under constant tension in order to make certain that each one is precisely the same length as its predecessor; slack is the enemy of a properly woven cloth. Using a flying shuttle to carry weft threads through the warp made it possible to weave a far wider bolt of cloth, but the required momentum introduced the possibility of a rebound, and thereby a slack thread. Kay’s invention still needed a skilled artisan to catch the shuttle and so avoid even the slightest bit of bounce when it was thrown across the loom.
Rosen, William. The Most Powerful Idea in the World: A Story of Steam, Industry, and Invention. New York: Random House, 2010.