Layout of the P-750B midget littoral-zone submarine with anaerobic powerplant based on closed-cycle gas turbine engine
Malachite Marine Design Bureau
P-750B sub is supposed to have a closed-cycle air-independent powerplant with gas turbine engine.
The Malachite’s director Vladimir Dorofeyev and head designer Igor Karavayev told Mil.Press Today about this project at the Army-2019 forum. Dorofeyev said such a submarine could be created within 5 or 6 years. Answering the question about the battery-free submerged speed of this kind of a sub, he said 10-12 knots.
In his interview to Mil.Press Today, Karavayev told about the powerplant. While on surface, the sub uses atmosphere air. Under water, oxidizer goes from the Dewar’s vessel where the liquid oxygen is stored. The gas mixture generated by the turbine is purified and frozen, emitting nothing outside. Thus, the submerged speed without batteries (only powered by the anaerobic plant) exceeds 10 knots.Currently, designers of Malachite bureau build the second stage of the submarine’s testing bed.
The key advantage of an air-independent powerplant is improvement of a submarine’s acoustic discretion. Subs become capable of staying underwater without the battery-charge surfacing for up to 2-3 weeks. Since 2010, Malachite bureau has been proactively designing the closed-cycle gas turbine anaerobic powerplant.
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