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Masdani, Masdani
Politeknik Manufaktur Negeri Bangka Belitung
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Penggunaan Produk 3D Printing Material EPA PLA Carbon Fibre Sebagai Twin Waterjet Propulsion pada Kendaraan Air Masdani Masdani; Hasdiansah Hasdiansah; Yuliyanyo Yuliyanto; Heru Riva'i; Ridhis Bar’ah Tarmi; Muhamad Noval; Gilang Putra Limarta
Manutech : Jurnal Teknologi Manufaktur Vol. 18 No. 01 (2026): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v18i01.753

Abstract

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.
Implementasi Sistem Informasi Perawatan Preventif berbasis Website Optimalisasi Perawatan Mesin Frais Fehlmann Picomax 20 di Jurusan Rekayasa Mesin Robert Napitupulu; Licia Christianty; Harpois Sitinjak; Masdani Masdani; Irwan Irwan; Better Swengky
Manutech : Jurnal Teknologi Manufaktur Vol. 18 No. 01 (2026): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v18i01.785

Abstract

State Polytechnic Manufacture of Bangka Belitung operates a mechanical workshop that serves as a practical training facility for mechanical engineering students. The high utilization rate of machines necessitates a well-structured preventive maintenance system to sustain optimal performance. However, the existing maintenance process is still conducted manually, leading to inefficiencies, schedule delays, and errors in maintenance records. This study aims to design and develop a web-based preventive maintenance system using the Laravel framework and the Agile (Scrum) development method. The system features include machine data recording, maintenance scheduling, automated notifications, digital reporting, and integration with Google Calendar to facilitate timely maintenance reminders. Black-box testing results confirmed that all system features functioned as intended and met user requirements. Based on a questionnaire survey of 50 respondents, 86% indicated that the system is highly important for improving maintenance efficiency, and 82% rated the notification feature are effective in optimizing maintenance schedule reliability. Implementation results demonstrated an improvement in maintenance regularity from 65% to 95%, a reduction in machine downtime by approximately 45% compared to the initial condition, and an increase in Overall Equipment Effectiveness (OEE) from 57.4% to 81.7%. These findings show that the developed system effectively enhances the operational efficiency of the mechanical workshop, extends machine lifespan, and supports a documented, measurable, and sustainable maintenance management process.
Co-Authors Abdullah hamid ACHMAD AFRIADI Ari Togar Maulana Ariansyah , Ariansyah Ariyanto Ariyanto Armannia, Vanessa Oksya Arriyani, Yang Fitri Aswin , Fajar Aswin, Fajar Better Swengky Bindara, Bindara Dafi Bazilah Daramawan, Tirta Dedhe Jumriladin Putra Susila Diah Mayleni Dwi Yulian, Naufal Ego Fernando Ego fernando Erick wiratama Erwansyah, Erwansyah Fajar Abdallah Fajar Aswin Febrian Alfarisyi Feriadi, Indra Gilang Putra Limarta Harpois Sitinjak Harwadi, Harwadi Hasdiansah, Hasdiansah Herianto . Heru Riva'i Husman Husman Idiar Ilham Ary Wahyudie Irwan Irwan J Hartati Khadadad Azizi Costacurta Khodad Azizi Costacurta Licia Christianty Muhamad Fikri Muhamad Muhamad Muhamad Noval Muhamad Riva'i Muhammad Haritsah Amrullah Muhammad Iqbal Nugraha Muhammad Rizki Muhammad Subhan Muhammad Subhan Nanda Pranandita Niko Julianto Oktriadi, Yudi Otniel Yulianto Pranata, Yogi Pratama, Adrian Deka Pristiansyah, Pristiansyah Rafly, Rafly Ramli Ramli Randa Randa Ridhis Bar’ah Tarmi Ridho Syahputra, Muhamad Ridhoni, Fauzan Riswanda Riswanda Robert Napitupulu Rollastin, Boy Sastra Setiawan Sastra Setiawan sayyid osama Sitinjak, Harpois S Sugianto Sugianto Sugiyarto Sugiyarto Sukanto , Sukanto Suzen, Zaldy Sirwansyah W Afridani Yuli Dharta Yuliyanto Yuliyanto Yuliyanto Yuliyanyo Yuliyanto Zaldy Kurniawan