Stirling Engine Submarine - Gotland-class submarines of the Swedish Navy are modern diesel-electric submarines, designed and built by the Kockums shipyard in Sweden. This submarine is the first submarine in the world to have a Stirling gine air-indepedt propulsion (AIP) system, which increases its underwater endurance from days to weeks.
In 2008, the Gotland-class submarine is one of the Swedish Navy's modern submarines in service, mainly designed for submarine missions such as antiship/antisubmarine warfare, intelligence collection (communication intelligce (COMINT), electronic signal intelligce (ELINT).
Stirling Engine Submarine
On the surface, the submarine is powered by two sets of MTU engines. While on the water, the Kockums-designed AIP Stirling gine system is used to drive a 75-kilowatt (101 shp) gerator for propulsion or battery charging. The Stirling gine is great for submarines because the gine is virtually submersible and can use the surrounding seawater as a heat sink to be efficient. Submerged power is the depdt of liquid oxygen stored in the vessel and described as "week". The course is characterized by low acoustic signature, shock resistance, and competitive edge.
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Kockums touts great maneuverability for this class due to the hull design and the well placed rudder X. X rudder gives four control points, including two mounted on the boat, which can be turned very well and can work close to the shore. Ship automation and computerized steering allows a single operator to control the submarine in depth and course, which also allows for a small crew to complete, resulting in better service standards and operating costs.
The class has many stealth features, which help it stay undetected. All boat engines have been isolated and placed on rubber dampers to reduce vibration and noise; hydrodynamic hull design reduces noise, infrared signature, and active sonar response. The magnetic signature is shielded by 27 indepdt electromagnets, low frequency electric field (ELF). Multiple layers of shell reduce sonar response, and the mast is coated with radar-absorbing material. Combined with the near-silt operation of the Stirling gerator and slow-turning fan to prevt cavitation, the ship is very difficult to detect in the water, especially in what environment, the limited sea of the Baltic.
HSwMS Halland has participated in several exercises in the Mediterranean since September 16, 2000. Allegedly, it has not been seen when closing many fridly enemies, feeling the pleasure of the participating countries. In November of the same year, he participated in NATO's "blue water" exercise in the Atlantic. There, he was declared victorious in a mock "duel" with a Spanish naval unit, and also in a similar match against a Frch SSN, a nuclear submarine. He also "destroyed" the American SSN, USS Houston.
HSwMS Gotland transits San Diego Harbor with the Nimitz-class aircraft carrier USS Ronald Reagan behind closed doors during the "Sea and Air Parade" held as part of San Diego Fleet Week 2005.
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In 2004, the Swedish government received a request from the United States to lease HSwMS Gotland - Swedish flag, command and manned, for a period of one year to be used in anti-submarine warfare. The Swedish government granted this request in October 2004, with the two armies signing a memorandum of understanding on 21 March 2005.
In 2005, the HSwMS Gotland successfully captured several images of the USS Ronald Reagan during a war in the Pacific Ocean, indicating that it was in a position to attack a cargo ship.
The exercise was conducted to test the effectiveness of the US fleet against diesel-electric submarines, which some noted were insufficient.
In 2001, in the JTFEX 01-2 game in the Caribbean Sea, Germany U24 from the convtional 206 diesel-electric class "released" the terprise operator by firing a flare and taking pictures from his periscope.
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In March 2013, Kockums received its first order for the renovation of two Gotland-class submarines. The renovation is expected to be completed in 2017. With the upgrade, the submarine will be operational until 2025.
On April 2, 2014, the Swedish defense minister, emphasizing the importance of submarines for Swedish security, announced the Governmt's intention to upgrade two Gotland-class submarines, as well as purchase two new "stealth" submarines of another type.
The negotiations ended on 30 June 2015 with the signing of an agreement between the Swedish Defse Material Administration (FMV) and Saab Kockums. In addition to the construction of two new Type 26 A SSKs, the contract provides for the mid-life upgrade of HSwMS Gotland and its sister ship HSwMS Uppland, at a cost of SEK 2.1 billion. Gotland is expected to return to FMV in late 2018 and Uppland in late 2019, followed by platform and battle system upgrades. Gotland returned to active duty in June 2018 after receiving upgrades to more than 20 systems. The same technology will also be included in the new submarine A26. Given the Platform 14 years ago by Hudson Miracle, Hero Pilot has been used to promote aviation safety.
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When Sweden loaned one of its AIP (Air Independent Power) submarines to the US Navy, the ship made waves. HMS
Operated out of San Diego for over 2 years in the early 2000s, reputedly 'sunk' the carrier USS Ronald Reagan (CVN-76) in one setting. It is not fast, but quiet, which is very useful in underwater warfare. Now the submarine has been upgraded with a more stealthy propulsion system.
Central to Gotland's success in training with the US Navy is AIP support. It is indeed one of the main reasons why the Navy wants to exercise against this particular ship. AIP means it can stay in the water longer than other non-nuclear ships.
Today's AIP is a newer generation than when the US Navy encountered it. Gotland was updated by Saab in 2018 and the second class, HMS
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The modification adds 6.5 ft to the overall length. The additional space accommodates what the Swedish Navy describes as a "new system to increase energy efficiency" (see press release in Swedish). This may indicate an AC that is part of the new AIP that also fits the new A-26.
AIP stands for Air Independent Power (also often described as Air Independent Propulsion). It provides electrical power to the submarine's hull while underwater, eliminating the need to use batteries, while non-nuclear submarines must rely on underwater batteries. When this runs out, every few days, the submarine has to put a snorkel above the water to get air so that the diesel engine can be recharged. Snorkeling is relatively crowded and makes submarines easy to spot.
AIP submarines keep their batteries for when they need it fast, but can be boarded in AIP. It is a popular myth that using AIP to charge the battery, which will not be useful.
Sweden was the first country to build a submarine with the modern AIP concept. The first ship to use the system was the HMS
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Which was revised in 1987-88. Swedish ships use closed-cycle Stirling generators as AIP sources. There are other types of AIP such as fuel cells used in German submarines.
Submarines are also for new battle management systems and new sensors for intelligence gathering. Swedish truth
Light torpedoes will be added to the arsenal soon. There is also a new diver's locker room for Special Forces operations.
Sweden's AIP submarines will continue to be weak carriers. They are constantly updated and often used, in line with development. What remains to be seen is whether the new generation Swedish Stirling AIP will find its way onto other countries' ships. How did Gotland manage to escape Reagan's anti-submarine defenses that included many ships and planes using many sensors? And more importantly, how can a cheap submarine costing around $100 million – roughly the cost of today's F-35 stealth fighter jet – be afforded?
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Fortunately, this did not happen in actual combat, but was attempted as part of a battle against soldiers with various anti-sea defenses.
The result was repeated over and over during the two years of the war, with anti-aircraft gunners and anti-aircraft gunners attacking Swedish naval vessels. Naval analyst Norman Polmar said
"running rings" around the American carrier task force. Another source claimed US anti-submarine experts were "demoralized" by the experience.
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A submarine costing about $100 million — about the cost of today's F-35 stealth fighter — could afford it? After all, the US Navy retired its last diesel submarine in 1990.
Diesel submarines were previously limited because they had to operate on a noisy wind-powered system, meaning they could only stay underwater for a few days before needing to surface. Of course, the simplest submarine,
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