<![CDATA[Waterjet propulsion is a propulsion system used on various water transportation, such as speedboats and amphibious vehicles. This technology works by drawing water through an inlet at the bottom of the vessel and then expelling it at high speed through a nozzle to generate thrust. Water vehicles that use Waterjet Propulsion such as Jet Skis, use waterjets for faster and more agile maneuvering movements, fast patrol boats used by the military and police for fast operations in shallow and narrow waters, fast ferries use this technology for fuel efficiency and high speed, amphibious assault ships used by the military to land troops and heavy vehicles on the beach, fast cruise ships use waterjets because they have minimal vibration and are smoother compared to conventional propellers. The advantages of waterjet propulsion compared to conventional propellers are its ability to operate in shallow waters, better maneuverability, high speeds with better efficiency. Based on these advantages, this research aims to design an innovative twin waterjet propulsion system. Where the waterjet propulsion is equipped with an inlet section that functions to increase thrust. The main components, which include the outlet, inlet, and impeller, are made using 3D printing technology with Ethylene Propylene Acrylate Polylactic Acid Carbon Fiber (EPA PLA CF) material. Tests were conducted to investigate the performance of waterjet propulsion on a laboratory scale using an electric motor at three rotational speeds: 2,500 rpm, 3,500 rpm, and 5,000 rpm. The test results showed a linear increase in thrust, with values ??of 3 N at 2,500 rpm, 6 N at 3,500 rpm, and 9 N at 5,000 rpm.]]>
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