Russian AIP submarine technology

There is another SSK project with AIP: "P-750B" - the world's first non-volatile NPL

No. That is a sea plane... not a submarine.

I think you meant this link:

https://zen.yandex.ru/media/they/p750b--pervaia-v-mire-vozduhonezavisimaia-napl-5e105e48e6e8ef00b12d7c74

yes, it got mixed up, thx! this project may superseed the Kalina.

I doubt it... as far as I can tell it is a different sized version of the Lada design... they were talking about getting a foreign customer to invest in it to get it built...

It is quite an interesting vessel with a crew of just 20... remember to operate 24/7 that means three shifts of crew working 8 hour shifts with 8 hours on and 16 off, so it probably normally operates with an actual crew of about 6 who work for about 8 hours and then are relieved for the next 8 hours by another crew of 6 who work and then are relieved by another 6 crew who after their 8 hours by the first 6 crew again... that would be 18 men with the commander and second in command probably taking 12 hour shifts each so at any one time there would be 7 guys operating the ship and the remaining 13 will be resting or eating or sleeping...

With the modern processing power on board such a sub I would suspect during there free time there is potential for some awesome LAN games...

GarryB wrote:I doubt it... as far as I can tell it is a different sized version of the Lada design... they were talking about getting a foreign customer to invest in it to get it built...

In the link about this submarine that you have shared it states that this submarine does not need to climb to the surface for air intake, as it will be equipped with two innovative gas turbine engines that are not dependent on air from the atmosphere.

Is this a new technology that is being developed?

Isos wrote:It's a small sub for export. Nothing to do with Kalina.

Do you have any more information about this sub? Thanks.

Isos wrote:

http://www.hisutton.com/Russian_P750B_Submarine_Design.html

So max crew is around 20. If Spetnaz are carried it means there will be fewer submariners, right?

Also, 12 torpedo tubes are carried in a frame which is lowered in to the outer hull from above. I'm unable to understand why this new design for the torpedo tubes?

In the link about this submarine that you have shared it states that this submarine does not need to climb to the surface for air intake, as it will be equipped with two innovative gas turbine engines that are not dependent on air from the atmosphere.

Is this a new technology that is being developed?

Not a link I posted but it is supposed to use some form of AIP... I have no idea what form of AIP it uses...

So max crew is around 20. If Spetnaz are carried it means there will be fewer submariners, right?

Probably not... the crew would be needed to operate the sub... they might carry less torpedos and armament perhaps.

Likely they would have subs especially intended to carry and deploy and/or recover special forces... AFAIK there is one Delta III SSBN converted to underwater "research".

They likely will have other smaller vessels too...

GarryB wrote:Not a link I posted but it is supposed to use some form of AIP... I have no idea what form of AIP it uses...

I was referring to the link that you posted in one of your previous tweets. This one

GarryB wrote:No. That is a sea plane... not a submarine.

I think you meant this link:

https://zen.yandex.ru/media/they/p750b--pervaia-v-mire-vozduhonezavisimaia-napl-5e105e48e6e8ef00b12d7c74

That aside, 12 torpedo tubes are to be carried in a frame which will be lowered in to the outer hull from above. So where will they place the AIP? There won't be any room for it.

I was referring to the link that you posted in one of your previous tweets. This one

Sorry, I didn't really read the link in detail... you posted a link but it was directed to a different story on the same website... I noticed your error and posted the correct link to the story you were talking about, but I really didn't read in detail that link...

This sub is designed from the start to have AIP propulsion... it isn't an add on... it is part of standard equipment.

This sub is a reduced size Lada class sub... the Lada was supposed to have an AIP propulsion system included, but that has been delayed.

This Lada class sub called P750 or something has AIP built in to the design, but as far as I know it is for export to countries like India if they want it...

This year, the St. Petersburg Maritime Bureau of Engineering "Malachite" will continue to test an air-independent power plant with a single gas turbine engine. This is stated in the company's annual report for 2019, published by the corporate disclosure center .

According to the developers, the installation allows the use of NAPL in all modes of surface and scuba diving with a smooth transition of the main gas turbine engine from the operating mode from atmospheric air to the closed loop operation mode and vice versa. In a closed cycle, a heavy artificial gas mixture is used.

The ability to supply shipboard electricity consumers and the battery charge will be provided in all modes.
It is noted that in the prototype model of VNEU the serial non-specialized gas-turbine generator unit GTA-18P is used. In 2019, it was finalized at the manufacturer, Chelyabinsk SCB Turbina JSC. Malachite announced the corresponding purchase in the summer of 2018. The cost of the work, according to the documentation of the procedure , amounted to 1.98 million rubles. After that, the tests were continued at the stand.
Technical solutions for the new VNEU are protected by two patents.

https://flotprom.ru/2020/%D0%9E%D1%81%D0%BA11/

VNEU for submarines of the Russian Navy will be created in 2023

MOSCOW, July 24 - RIA Novosti. An air-independent (anaerobic) power plant (VNEU) for submarines of the Russian Navy will be created by the end of 2023, design work is currently underway, said Alexey Rakhmanov , General Director of the United Shipbuilding Corporation ( USC ) .

In October 2019, the Rubin Central Design Bureau (developer of VNEU) and the Ministry of Industry and Trade signed a state contract for the creation of a prototype shipboard VNEU.

"Design work is underway. However, a decision on the practical implementation of this technology in specific projects will be made only based on the results of the contract - not earlier than the end of 2023,

https://ria.ru/20200724/1574831721.html

Russia's new Project 750B - AIP submarine

https://www.navalnews.com/naval-news/2020/08/russias-p-750b-small-attack-submarine-design-by-malakhit-design-bureau-part-1/


This is probably a step in the direction of AIP. Will it sell? We'll have to wait and see.

That being said a bigger deal, in my opinion, is the pump-jet. If Malakhit has developed an in-house pump-jet design, and it's not just a promotional mock-up, Yasen-M SSN can be modified with a pump-jet later for improved shallow-water operations.

FFS... not this "pump-jet-is-better" BS again...

Yasens don't need a pumpjet as they can cruise at a depth where cavitation doesn't occur at the prop edges. Pump jets introduce performance penalties, so why use them if they aren't needed?

Pump jets for shallow water operations. In case that was not clear.

Sujoy wrote:Pump jets for shallow water operations. In case that was not clear.

Sure, I get that, and don't get me wrong, I think SSBNs should be fitted with them as a standard, but no decent SSN should need them, and SSKs will wear too much of a performance penalty IMHO and they lack the abundance of power that SSNs can lay down.

The usual Russians are too stupid to know of pump jets and how to build them. Like the retarded bitching about winglets on the tips of Sukhoi Superject wings.
The morons don't even understand that the Superjet uses custom thin aoerofoil wings. The Russian designers of these craft know exactly what they are doing.
The average forum poster knows Jack shit.

owais.usmani wrote:

Big_Gazza wrote:FFS... not this "pump-jet-is-better" BS again...

Yasens don't need a pumpjet as they can cruise at a depth where cavitation doesn't occur at the prop edges.  Pump jets introduce performance penalties, so why use them if they aren't needed?

Project 885 can almost certainly dive deeper than any of the NATO nuclear subs (Wiki says 600m), however for firing its cruise missiles it would have to come near the water surface.

Sure, but it can ascend from a deep cruising depth at a slow speed and thereby remain silent. It doesn't need pumpjets except if trying to maintain a high speed at shallow depth, and there is zero reason why a 885 should need to do this.

The Russians have extensively tested a single Kilo class sub with a pumpjet. They have used them on some and not on others which suggests they are familiar with their features and advantages and disadvantages and know when they will be useful and when not.

The fact that every single Kilo is not now fitted with a pumpjet suggests a screw is better for its missions.

BTW another factor people seem to be ignoring is teh extensive plastic rubbish in the worlds oceans... an issue with propellers everywhere but I would assume rather more of a problem for a pumpjet...

GarryB wrote:The Russians have extensively tested a single Kilo class sub with a pumpjet. They have used them on some and not on others which suggests they are familiar with their features and advantages and disadvantages and know when they will be useful and when not.

The fact that every single Kilo is not now fitted with a pumpjet suggests a screw is better for its missions.

Certain western reports like this one written by H I Sutton suggests that Russia will jointly develop a submarine with China.

https://www.forbes.com/sites/hisutton/2020/08/27/china-and-russia-in-mysterious-new-submarine-project/#7fcbbf261629

This basically confirms several reports that countries in Asia that purchased submarines from China are no pleased with their performance. I suspect this is why China needs Russian help. If they jointly develop a submarine maybe they can export it as well.

This project will probably be similar to the Lada class.

Sujoy wrote:

GarryB wrote:The Russians have extensively tested a single Kilo class sub with a pumpjet. They have used them on some and not on others which suggests they are familiar with their features and advantages and disadvantages and know when they will be useful and when not.

The fact that every single Kilo is not now fitted with a pumpjet suggests a screw is better for its missions.

Certain western reports like this one written by H I Sutton suggests that Russia will jointly develop a submarine with China.

https://www.forbes.com/sites/hisutton/2020/08/27/china-and-russia-in-mysterious-new-submarine-project/#7fcbbf261629

This basically confirms several reports that countries in Asia that purchased submarines from China are no pleased with their performance. I suspect this is why China needs Russian help. If they jointly develop a submarine maybe they can export it as well.

This project will probably be similar to the Lada class.

The latest small Su-35 sale proves this cooperation is not in the interest of Russia.