[texas booster]

Why doesn’t Russia’s newest SSN have a pumpjet? Pumpjets are usually less efficient than conventional open propellers at high speeds, create more drag, and weigh the stern of the submarine down. The Severodvinsk uses a similar power plant to the Akulas, so it is safe to assume the screw is generally similar.

*****

Some Oscar IIs had slightly different screws. The boss cap has a vortex attenuator with many more slanted blades, very similar to the vortex attenuators on some American Los Angeles class SSNs (see my American Submarine Propeller album). The blades also have more rounded tips.

Thanks Spktyr, these guys photo albums on Imgur are an excellent time waster!

[Chode]

thank you

[Chode]

i remember when Toshiba sold the six axis cnc machines to the russ... bad juju

[Navy Patriot]

Thanks again, Texas!