Swedish Aircraft Carrier - The Nimitz-class aircraft carrier USS Ronald Reagan can carry as many as 90 aircraft on its surface and has multiple radar systems, anti-torpedo countermeasures and even electronic warfare. But during the 2005 war games, a small diesel-powered submarine built for the Swedish Navy "skimmed" it and sank it,
Interestingly, the U.S. Navy retired diesel submarines in the 1990s in favor of nuclear submarines. Although they cost only a few hundred million dollars to manufacture, diesel submarines need air to burn their fuel and often need to surface to replenish their air supply. Even with a snorkel, it's easier to detect a diesel sub because it surfaces every few days. Nuclear-powered submarines, on the other hand, can stay underwater for longer periods of time, surfacing just to resupply the crew. So it makes sense to switch to nuclear powered submarines to keep the element of surprise.
Swedish Aircraft Carrier
However, even after the U.S. switched to nuclear-powered submarines, Sweden continued to develop its diesel-powered submarines. The Gotlands are equipped with quiet Stirling engines that don't need air to power them, allowing them to stay underwater for weeks if needed, or switch to diesel for longer trips.
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Naval forces can also conduct silent, stealthy operations by recharging the submarine's batteries. While nuclear-powered submarines have batteries, they require coolant to keep the reactors cool, which could reveal their location. But with the help of Stirling engines, the Swedish sub was able to conduct quieter operations, which could prove fatal to an aircraft carrier not once or twice, but for two years, Business Insider reported.
Other structural modifications to the submarine, such as anti-sonar coatings on the hull, radar absorbers on the turrets, slow-rotating propellers, acoustic damping buffers on the internal machinery, and 27 electromagnets to prevent detection by magnetic anomaly detectors also contributed to the success. . .
With sharp turn capabilities and computer-controlled steering that allows only one operator to control depth and heading, the submarine is more maneuverable than other submarines, making it difficult to detect after being hit. After the exercise, the U.S. Navy requested a submarine deployment with the U.S. military to improve anti-submarine warfare capabilities, which was extended to two years.
There's going to be a lot of crazy costumes at this big Halloween party, but how about some cocktails to spice up the fun? She met it in the form of Sweden's only diesel-powered submarine. Bold subs are able to penetrate ships' passive sonar defenses during war games
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And his entire convoy scored a few rare torpedo hits, (virtually) sunk the cruiser and left unscathed.
How? As Real Engineering explains, it's all down to vintage engines. Instead of using diesel to power an internal combustion engine (which is noisy, exploding, etc.),
This subclass uses a highly optimized Sterling motor, not unlike the tabletop toys you might find, but significantly more technologically advanced. These extremely quiet motors are used to charge the batteries, which in turn drive the motors directly. The result is a submarine that is quieter than any other diesel engine, even its nuclear-powered counterpart, which requires a constant flow of coolant to give away its position.
While the actual failure was clearly disturbing, the Navy leased a Gotland-class submarine from the Swedes to see what to do about its unexpected stealth. And, of course, it's unlikely we'll have a real war with Sweden anytime soon.
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But the story shows that making progress in engineering doesn't always mean creating new solutions. Sometimes you can make a leap by looking back carefully and wisely.
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This World War II wreck is polluting the ocean, and it's time to damn it! The aircraft carrier USS Ford was finally deployed 36 years ago, a nuclear submarine sank in Bermuda waters today Japan is building the largest warship in Asia, luckily this did not take place in a real battle but was simulated as part of a war game, These include anti-submarine escorts for many combat units. for HSMS
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That outcome was repeated over two years of war games, in which enemy destroyers and nuclear attack submarines succumbed to stealthy Swedish subs. Maritime analyst Norman Polmar says
They "circled" the US carrier task force. Another source said US anti-submarine experts were "demoralized" by the experience.
An elaborate anti-submarine defense system involving multiple ships and aircraft using a large number of sensors? More importantly, what is the ratio
Could the submarine, which cost about $100 million to build — roughly the price of an F-35 fighter jet today — be able to pull it off? Finally, the US Navy decommissioned its last diesel submarine in 1990.
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In the past, diesel submarines needed to run noisy, gas-guzzling engines, which meant they could only stay submerged for a few days before surfacing. Naturally, the sub is the most vulnerable and the easiest to track when it surfaces, even with a snorkel. Submarines powered by nuclear reactors, on the other hand, do not require large reserves of air to operate and are much quieter.
However, Sweden's 200-foot-long Gotland-class submarine, launched in 1996, was the first to use an air-independent propulsion (AIP) system, in this case a Stirling engine. The Stirling engine charges the submarine's 75-kilowatt battery
With Stirling, a Gotland-class submarine can stay underwater for up to two weeks and maintain an average speed of 6 miles per hour -- or 23 miles per hour on battery power. Conventional diesel engines are used for ground operations or when snorkels are used. Powered by Sterling
The Gotland class has many other characteristics that allow it to evade detection. Twenty-seven electromagnets are installed, designed to counteract its magnetic signature to the Magnetic Anomaly Detector. Her hull benefits from an anti-sonar coating, while the turrets are made of radar-absorbing material. The machine inside is coated with rubber sound-deadening mufflers to minimize sonar detectability. This
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Its six control surfaces on the rudder and X-sails provide excellent maneuverability, enabling it to operate close to the seabed and make sharp turns.
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And its crew conduct anti-submarine exercises for two full years. The results convinced the U.S. Navy that its undersea sensors were no match for AIP stealth craft.
This is just the first of many AIP-powered submarine designs – some with double the underwater durability. Sweden is far from the only country deploying them.
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China has two types of diesel submarines with Stirling engines. Fifteen of the original Type 039A class were built in four different variants, with over 20 more planned or already under construction. Beijing also has a 032 Qing-class ship that can stay underwater for 30 days. It is believed to be the largest operational diesel submarine in the world, with seven vertical launch system cells capable of launching cruise and ballistic missiles.
It is an evolution of its widely produced Kilo-class submarines. However, sea trials found that the batteries provided only half of the expected output, and the type was not approved for production. However, in 2013, the Russian Navy announced that it would produce two heavily redesigned MSS, the so-called
Other producers of AIP diesel submarines are Spain, France, Japan and Germany. These countries then sold them to navies around the world, including India, Israel, Pakistan and South Korea. Submarines using the AIP system have evolved into larger, more heavily armed and more expensive types, including Germany's Dolphin-class submarines and France's Catfish-class submarines.
The U.S. Navy has no intention of building diesel subs again, preferring to stick with multibillion-dollar nuclear subs. It's easy to see the Pentagon once again opting for more expensive weapons systems over cheaper alternatives. It is not
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Diesel submarines are ideal for patrolling near friendly shores. But outside of Asia and Europe, American submarines must sail
Miles to get there, then stay put for a few months. A diesel submarine might be able to cover that distance -- but then it would need frequent refueling at sea for long-duration deployments.
? It was shipped back to Sweden in a mobile dry dock, rather than making the journey under its own power.
While a new AIP-equipped diesel sub can go weeks without surfacing, it's still not as good as
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