![mechanical engineering - Purpose of spheres and fins on submarine propeller - Engineering Stack Exchange mechanical engineering - Purpose of spheres and fins on submarine propeller - Engineering Stack Exchange](https://i.stack.imgur.com/vDXwO.jpg)
mechanical engineering - Purpose of spheres and fins on submarine propeller - Engineering Stack Exchange
Why do the US submarines have a ring around the propeller when the Soviet submarines leave their propeller exposed? - Quora
![An album of American nuclear submarine propulsors (screws and pumpjets) in roughly chronological order : r/WarshipPorn An album of American nuclear submarine propulsors (screws and pumpjets) in roughly chronological order : r/WarshipPorn](https://external-preview.redd.it/C8IBCGavMMdmDjM6DeiyAcjIi86w1FGUgJQ_7bpKgYQ.jpg?auto=webp&s=b303fd7333077b03a3a4497ebca11b37224639b6)
An album of American nuclear submarine propulsors (screws and pumpjets) in roughly chronological order : r/WarshipPorn
![H I Sutton on Twitter: "Lots of interest in photos of submarine screws ( propellers) following images of Turkish Type-214. These are 'secret' and are often covered. This is valid, as an adversary H I Sutton on Twitter: "Lots of interest in photos of submarine screws ( propellers) following images of Turkish Type-214. These are 'secret' and are often covered. This is valid, as an adversary](https://pbs.twimg.com/media/FjsDAdGXkAE5pkP.jpg)