Here comes Arkhangelsk, a submarine that will boost the Northern Fleet’s hypersonic missiles capabilities

The Barents Observer ^ | Nov 29 2023 | Thomas Nilsen

[Chode]

LOL!!! if she knew, she'd a put on a show for you... 8^)

[MeanWestTexan]

If it’s like any of the other Russian boats you could find it with a geigher counter in an airplane.

[DesertRhino]

That photo must be fake. I don’t see any females.

[Spktyr]

Yeah, they use an open screw instead of a pumpjet. Which kind of makes sense as this thing is not a boomer or attack sub. It’s the equivalent of our SSGNs, mostly it’s a missile truck to haul around (usually) non-nuclear cruise missiles, so a higher cruise speed might be something they designed for to get missiles in range of a ‘brushfire war’ target.

Russia does have ducted-prop pumpjet technology and they’re not alone in using open screws on modern non-boomer subs.

[Spktyr]

That hasn’t been the case for their boats in a while, except for the few Alfas left in service.

[Spktyr]

Yeah, that’s the Russians’ latest SSGN (NOT SSBN) equivalent.

[Spktyr]

Here's one of their SSBN equivalents, a now-retired Typhoon-class, with part of one pumpjet and a tiny bit of the other out of the water visible in this pic - so they do have the tech. The Borei-class successor is single pumpjet.

[Spktyr]

Good enough that this quote is in the Wiki article on the class:

“According to Admiral Foggo, the commander of the US Naval Forces Europe, the Yasen class submarines are “very quiet, which is the most important thing in submarine warfare”. It’s claimed that Severodvinsk is far quieter than previous Russian SSNs, capable of 20 knots while running quiet, which is equal to the Seawolf class and inferior only to the Virginia class (25 knots). Other sources claim that Severodvinsk is capable of even 28 knots in silent mode.”

Assign that whatever value you wish.

The prop design is probably some variant on the many-bladed, skew blade, narrow/short chord that’s popular these days.

A history of Russian props: https://imgur.com/a/t6UjU

[Navy Patriot]

Thanks, Spktyr!

[Chode]

thank you...

[Navy Patriot]

Thanks again, Spktyr!

[Chode]

yes, that’s why i was surprised

you say an open screw is faster?

[Navy Patriot]

What one can see of Arkhangelsk, she looks to be fast, maneuverable and she has tabs!

Maybe eight blades?

Not sure about acceleration, but that's not usually a critical factor.

Still, I'd take a ride!

[MeganC]

“Top secret propeller design”

Most likely is it’s another variable pitch prop that throws blades.

[Long Jon No Silver]

If they need crew, there’s plenty of RatPutin ass kissers on FR

[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!

[Vaduz]

One ping

[Chode]

thank you

[Chode]

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

[Navy Patriot]

Thanks again, Texas!