There is also the British R-class submarine from WW1. It was designed to be faster underwater than on the surface: https://en.wikipedia.org/wiki/British_R-clas

There is also the British R-class submarine from WW1. It was designed to be faster underwater than on the surface: https://en.wikipedia.org/wiki/British_R-class_submarine https://en.wikipedia.org/wiki/British_R-class_submarine That one made series production, ten being made. I wouldn't be surprised if the USS Albacore design team learned something from the British experience with hunter-killer submarines.