James Alexander Michie: The fearsome submarines of Sweden | The National Interest
Author: James Alexander Michie
Submarines have been seen in two discreet ways over time, traditional diesel-electric that are needed to emerge every day to recharge their noisy air-breathing engines and nuclear-powered submarines could be very quiet under the sea to relatively high speeds for several months thanks to its nuclear reactors.
There are disadvantages in those of nuclear propulsion that cost much more than those diesel, which for some countries is not really worth it if its objective is only to protect and defend its coastal waters, for some countries the most important thing is an affordable price, as well as Sweden, which is located in a crowded neighborhood in front of the Russian naval bases in the Baltic Sea.
Although Sweden is not part of NATO, Moscow has declared that it could take measures to “eliminate the threat” if Stockholm joins or supports the alliance.
Sweden began to develop during the 1960s a modernized version of the Stirling engine that was first developed in 1818 which started driving cars of the 1970s. Then the Stirling engine in 1988 began to power a submarine Nacken A14 of the Navy Swedish Because it burns the fuel by using liquid oxygen stored in cryogenic tanks instead of an air-breathing engine, it allows low-speed sailing for weeks in a silent way without having to surface.
On the other hand, Sweden converted its diesel-electric submarines of the late 1980s between 2003 and 2005 to use the Stirling AIP engines, which consisted of cutting the submarines in two and extending them from forty-eight to sixty meters. Likewise, Sweden intends to withdraw its ships between 2019 and 2022.
Take a read: https://nationalinterest.org/blog/buzz/why-russia-fears-sweden%E2%80%99s-deadly-submarines-25896?page=0%2C1
Source: Sebastien Roblin | The National Interest
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