The leading Swedish diesel submarine Gotland returned to service after modernization

The Royal Royal Navy of Sweden received a leading submarine of the Gotland class, which was modernized. According to Naval News, the hull has been increased in the submarine and the third-generation VNEU has been installed.

The modernized at the shipyard Saab Kockums Swedish submarine "Gotland" has finally returned to the composition fleet. As stated by representatives of the Navy, now Gotland is the most modern, inconspicuous and effective submarine in the Baltic and North Seas.

Reportedly, during the modernization, the submarine lengthened the hull by cutting a two-meter section into it. In addition, the Gotland is equipped with an air-independent installation of the third generation, created on the basis of the Stirling engine. The submarine received a new Safran periscope, Kongsberg SA9510S sonar system, Exelis ES-3701 electronic warfare system, promising CIUS and much more. Some of the new products installed on the submarine are intended for submarines of the new generation of the A26 project.

The Gotland diesel-electric submarine is the lead in a series of three submarines. It was launched on February 2, 1995 and put into operation on September 2, 1996. Submarines of this type have an underwater displacement of about 1600 tons with a length of 60,4 meters (after modernization, the length has changed to 62,7 meters, displacement is not indicated) and a width of 6,2 meters. The working depth of immersion is 320 meters. Speed ​​under water - 20 knots. The crew is 27 people. Armament: Torpedo mine - 4 bow 533 mm TA, 12 torpedoes; 2 bow 400 mm TA, 6 torpedoes; 12 min (instead of torpedoes). Submarines of this type were initially equipped with a Stirling engine, which allows you to extend the stay of the submarine under water for up to two weeks instead of the usual several days.

With the installation of a third-generation non-volatile power plant, the submarine is now able to be in the underwater position for more than 20 days instead of the previous 14.

Comments

[The leader of the Redskins]

...the submarine has increased hull length
Nitsche yourself! This is me, I understand, modernization! ...

[Sky strike fighter]

Quote: Leader of the Redskins

...the submarine has increased hull length
Nitsche yourself! This is me, I understand, modernization! ...

So they have only 3 submarines of Gotland, two of which the fisted Swedes are modernizing. Therefore, they do not save. They promise to build the first new A-26 in 2024.

The Gotland is the first of three submarines built for the Swedish Navy in the second half of the 1990s. According to Saab representatives, the modernization of the second diesel-electric submarine, Uppland, is being completed at the shipyard in Karslkron. The final decision on the modernization of the third submarine, Halland, has not yet been made.

After modernization, more than 20 state-of-the-art systems will be deployed on the Gotland-class submarines, which will later be deployed on the new generation A26 submarines. The first of them is going to be commissioned in 2024. Swedish navy officials say equipment compatibility will make training easier.

The length of the modernized submarine "Gotland" was 62,7 meters (displacement is not indicated). On the surface, she develops a speed of up to 11 knots, under water - 20 knots. Crew - 32 people.

The submarine is armed with four 533 mm and two 400 mm torpedo tubes. Also included in the arsenal is 48 minutes.

https://flot.com/2020/%D0%A8%D0%B2%D0%B5%D1%86%D0%B8%D1%8F3/

[Doccor18]

It looks like the new VNEU is larger in size than the previous one. Weapon systems remained the same. So they increased the case under it.

[Sergey S.]

Quote: Doccor18

It looks like the new VNEU is larger in size than the previous one.

I suppose that the volume of liquid oxygen tanks has been increased.

[Sky strike fighter]

Quote: Sergey S.

Quote: Doccor18

It looks like the new VNEU is larger in size than the previous one.

I suppose that the volume of liquid oxygen tanks has been increased.

Most likely it is. A less detailed image of the new-generation MkIII air-independent installation is shown, which will also be on the A26 under construction, using the link below.

The non-volatile installation was upgraded on the boat (Kockums v4-275R Mk III Stirling engine, which uses liquid oxygen). Now the submarine can remain under water without surfacing for up to two weeks. Also, a new sonar, control systems and electronic warfare were installed on the boat. For the installation of new equipment, the hull of the boat was extended by two meters.

According to the representative of the Saab shipyard, the modernization of the ships makes it possible to work out the use of a new generation MkIII non-volatile installation, which will be installed on new Blekinge class submarines (A26), which are now being built at Saab Kockums. It also allows you to train crews to work with new equipment.

https://zen.yandex.ru/media/stapel/shvedy-poluchili-grozu-morei-baltika-trepescet-5ec3f611ce25c80f46027197

[V.I.P.]

VNEU of the third generation ..... In the Russian Federation they could not even do the first. Abandoned this business. And what words they wrote. And it will be, and not have an analogue in the world, and surpass everything on the planet, and the efficiency will be incredible, and safety ... ..All. Sailed)) ..... A lot of everything that is not there, but has no analogs, only in cartoons and pictures will remain unfortunately.

[Sky strike fighter]

Why have they abandoned it? In 2022, the Rubin Central Design Bureau will complete the development of the VNEU. At least they say so.

[pl675]

Quote: Sky Strike fighter

Why have they abandoned it? In 2022, the Rubin Central Design Bureau will complete the development of the VNEU. At least they say so.

Do you still believe in urinotherapy and Santa Claus?

[Interlocutor]

Yes, yes, yes ..... We all die. We know. Over the hill all the best, all the big, all the same, the most, the most ....

[V.I.P.]

And what is wrong? Our Navy was going to buy VNEU abroad. Swedish they did not like. They wanted to take from the Germans. But they agreed to sell only with their boats! And all this infrastructure still needs to be redone .. It came out very expensive. They refused purchases, promised theirs. She was supposed to be on the Lada boats. There is no Lad (they were developed under VNEU) ... No installations. How many decades have already passed and money spent ... And you can believe in the absence of a tax in the world.

[Sky strike fighter]

Two serial Lada, under construction on the finalized project 677D, will be commissioned in 2021 according to the plan. So Lada will be. And VNEU will be finished in 2022.

. And you can believe in no tax in the world.

Methodology change.

[VLADIMIR VLADIVOSTOK]

Mu should shout for the whole world that we have, we do not have a car. How do you know? Even if not, do you know the tactics and strategy of using boats?

[knn54]

But at the exercises in 2005, she was able to "sink" the aircraft carrier "Ronald Reagan" and go unnoticed.

[Boa kaa]

Quote: knn54

she was able to "sink" the aircraft carrier "Ronald Reagan" and escape unnoticed.

Colleague, these are peacetime games. We have 971, being previously undetected, also surfaced inside an anti-submarine warrant at a NATO exercise to transfer a fighter with peritonitis to the shore. But in the war, after the first torpedo on board, the whole sea would boil in the sector on the opposite P * shooting ...
But the boat is really dangerous. It is enough to recall her duel in 2003 in Middle-earth with the Spanish diesel-electric submarine, then with fr. Ruby type pla and Houston type American submarine type Los Angeles. At the same time, Halland is 4,5 times cheaper than the improved Elk.

[novel66]

and immediately ochrenachit base - and the sense of the invisibility and autonomy

[Kerensky]

Well, they will be on duty by the couple. One at sea? Chic area!

[Igor Borisov_2]

Quote: novel xnumx

and immediately ochrenachit base - and the sense of the invisibility and autonomy

Well, the Swedes do not have bad rock shelters for boats. Immediately ohranichit may not work

[demiurg]

And after all nobody wrote, 5 years in repair, long-term construction, cannot do anything, drank.
And all that, a ship with a displacement of level 1124. A completely different thing, yes.

I will repeat my couch opinion. VNEU for pl, this is a dead end. Dollezhal's egg should solve all issues with autonomy pl in a crisis period. It is many times more effective, cheaper and safer than lithium batteries or dancing with oxygen on board the square. No one forbids installing the mount for the device during secondary repairs. The installation itself is fast enough.

[pl675]

Quote: demiurg

And after all nobody wrote, 5 years in repair, long-term construction, cannot do anything, drank.
And all that, a ship with a displacement of level 1124. A completely different thing, yes.

I will repeat my couch opinion. VNEU for pl, this is a dead end. Dollezhal's egg should solve all issues with autonomy pl in a crisis period. It is many times more effective, cheaper and safer than lithium batteries or dancing with oxygen on board the square. No one forbids installing the mount for the device during secondary repairs. The installation itself is fast enough.

I will answer briefly - in the wardrobe, in addition to "adik", a pair of shirts should hang, and a jacket with pockets, and jeans, and shorts - there is a use for everything, and every piece of clothing is good / comfortable in its own way.

[akribos]

Gotland and before modernization, was more than on the level!

[agond]

If we compare the Gotland underwater displacement of 1600 tons with our water carriers Varshavyanka 3950 tons, Halibut 3100 tons, then how would a taxpayer want to know from our sailors who were involved in their construction "KU-KU guys, why did you do this?" in other matters what to expect if there are few brains ... mostly ballast, ...
On the topic of VNEU, it would be very interesting to combine the stirling engine with a heat pump, so that at least partially use the heat of the ocean to heat the working fluid of the VNEU, by the way, it is not necessary to use stirling, the installation can consist of two or more turbo-expanders with different coolants.

[agond]

Quote: agond

On the topic of VNEU, it would be very interesting to combine a stirling engine with a heat pump

I will try to simplify to explain the idea of ​​a mono-thermal power plant A Yaili consisting of two circuits or parts
Part 1 - represents a heat pump using a water-ammonia solution operating according to the A. Kalina cycle, the task of this part of the installation is to evaporate ammonia from an aqueous solution by heating it from overboard water, and then compress the ammonia obtained and thereby increase its temperature, then ammonia heated by compression must transfer its heat further to the second part of the installation
Part 2 -, the heat received from the first part of the installation from ammonia compression evaporates octafluorocyclobutane (RC318 is such a refrigerant for refrigerators)) which rotates the turbine that rotates the generator; cold water-ammonia solution from the first part is also used to condense octafluorocyclobutane.
The water-ammonia mixture was not chosen by chance, since the dissolution of ammonia in water greatly changes the vapor saturation temperature and pressure, and even ammonia can be separated from the water. separation
The entire mechanical part of the installation is assembled on one shaft in the order an ammonia compressor, a heat exchanger, an ammonia expander, then a heat exchanger for octafluorocyclobutane and a power take-off turbine. plus separator, heat exchangers, condensers