From stories I’ve read, I think people generally, and including Feynman, concluded that the sprinkler would not rotate. Because conservation of angular momentum

From stories I’ve read, I think people generally, and including Feynman, concluded that the sprinkler would not rotate. Because conservation of angular momentum. Which is almost true. So what’s fun is that this experiment shows it’s not entirely true, if you have a sensitive enough experiment that takes into account more nuance of the fluid dynamics.