Zona Mesin: Program Studi Teknik Mesin Universitas Batam

ANALISA PENGARUH PENAMBAHAN WING ASPECT RATIO TERHADAP PERFORMANCE PESAWAT TERBANG TANPA AWAK MALE DENGAN SIMULASI CFD ANSYS

Sony Liston — 2025-05-05

The demand and development in the aerospace sector for unmanned aerial vehicles (UAVs) is continually increasing. In the last few years of development on Medium Altitude Long Endurance (MALE) UAVs, which aim to perform Intelligence Surveillance Reconnaissance (ISR) missions or reconnaissance and surveillance missions in border areas from a distance. The author conducted research on the variation of wing planform for Medium Altitude Long Endurance (MALE) UAVs to determine the aerodynamic characteristics of different wing planform variations, aiming to increase the endurance and range of the MALE UAVs. To obtain the aerodynamic characteristics of the Medium Altitude Long Endurance (MALE) UAV, the author used Computational Fluid Dynamics (CFD) software ANSYS Fluent and methods for calculating range and endurance, assuming flight conditions at 16,000 feet. The conclusions of this research show that the proposed wing planform with an aspect ratio of 30 is the configuration with the highest increase, with a constant altitude endurance increase of 0.66 hours or 2.9%, a constant speed endurance increase of 0.65 hours or 2.9%, and a range increase of 152.45 km or 2.9%.

PENGARUH PENAMBAHAN KAPASITOR PADA SISTEM PENGAPIAN MOTOR TERHADAP PENINGKATAN PERFORMA

Muhammad Andita Firdaus — 2025-05-05

Penelitian ini bertujuan untuk menganalisis pengaruh penambahan kapasitor pada sistem pengapian motor terhadap peningkatan performa mesin. Sistem pengapian merupakan komponen vital dalam mesin motor yang berfungsi untuk mengatur pembakaran bahan bakar. Penambahan kapasitor diharapkan dapat meningkatkan efisiensi pembakaran dan kinerja mesin secara keseluruhan.

Metode penelitian yang digunakan adalah eksperimen dengan membandingkan performa mesin sebelum dan sesudah penambahan kapasitor. Parameter yang diukur meliputi Torsi dan Daya . Hasil penelitian menunjukkan bahwa penambahan kapasitor pada sistem pengapian motor dapat meningkatkan nilai prestasi mesin dibandingkan dengan pengapian standar . Hal ini dapat dilihat dari nilai power dan torsi mengalami peningkatan signifikan pada pengapian yang ditambahkan 2 kapasitor untuk daya dan 8 kapasitor untuk torsi. Selain itu, terdapat peningkatan signifikan pada tenaga mesin yang dihasilkan.

Kesimpulan dari penelitian ini adalah bahwa penambahan kapasitor pada sistem pengapian motor memberikan dampak positif terhadap peningkatan performa mesin. Temuan ini diharapkan dapat menjadi referensi bagi pengembangan teknologi pengapian motor yang lebih efisien dan ramah lingkungan

Kata Kunci : Kapasitor, Pengapian, Performa, Sepeda Motor

STRATEGI PEMELIHARAAN UNTUK MENINGKATKAN LIFE TIME PADA PONTON AMPHIBIOUS EXCAVATOR

Delpra Yandi — 2025-05-05

The pontoon on an amphibious excavator is a crucial component that enables the heavy equipment to operate in wetlands, swamps, and shallow waters. However, due to direct exposure to water, mud, and hard materials like rocks and wood, the pontoon experiences accelerated degradation caused by corrosion, impact, and friction. This study aims to develop a maintenance strategy to extend the pontoon’s lifespan. The methodology includes field observations, visual inspections, and interviews with mechanics and maintenance staff. The findings indicate that major damages include leakage due to corrosion, bent track link assembly rails, and worn-out wearing strips. To address these issues, the proposed maintenance strategies include painting the pontoon with corrosion-resistant coatings, replacing rails before severe damage occurs, and periodically replacing wearing strips. Implementing these strategies is expected to extend the pontoon’s lifespan, enhance workplace safety, and reduce maintenance and replacement costs in the future.

WPS (WELDING PROCEDURE SPECIFICATION) UNTUK PEMBUATAN KONSTRUKSI MODULE MENGGUNAKAN MATERIAL S355J2 DENGAN PROSES PENGELASAN FCAW-GS

Aji Sutrisno — 2025-05-05

In the world of projects, be it oil and gas, power plants, petrochemicals or the shipbuilding industry, it is certainly very common and cannot be separated from welding. The basic meaning of welding itself is basically the joining of two materials using a welding arc, where there will be a fusion (fusion) of the two materials to become united and unified. The welding process itself consists of various processes and their uses. Meanwhile, the test implementation also consists of various methods and techniques, be it the results of the weld or the person carrying out the welding. Here the test results have been carried out in the test laboratory using the Charpy impact test method, tensile test. Meanwhile, the body and test site are also ISO and UKAS certified, bodies recognized by national and international oil operators. The background of this final assignment I made is to analyze the use of WPS (Welding Procedure Specification) with Plate S 355J2 material which causes defects in welding that should not have occurred. The purpose of this final assignment I made is also to be able to find and end the cause of welding defects and repair the welding structure itself. The method used by the author is to use several methods that the author has done in previous projects, both in work and with training or training as theoretical knowledge. The results of this final assignment also produce solutions and root causes of the problems faced by the author and practice work in accordance with the procedure. Providing experience in how to practice the implementation of WPS (Welding Procedure Specification) which holds a very important key in the structural construction industry in this offshore module building.

Keywords: Standard Welding Rule for Offshore Structure

ANALISIS PERFORMA MESIN SEPEDA MOTOR DAN EMISI GAS BUANG AKIBAT PEMAKAIAN BAHAN BAKAR DENGAN OKTAN YANG BERBEDA

Ludwijk Abia Theodorus Siboro — 2025-05-05

The development of science and technology over time encourages humans to create innovative works. The increasing and diverse human needs also trigger the development of technology, including technology in the automotive sector. The aim of the research is to find out the performance and exhaust emissions produced by the TCI ignition system and standard spark plugs on motorbikes that use pertalite, Pertamax and Pertamax turbo fuel. The research results are in the form of maximum torque and maximum power at certain rpm for each fuel so that differences in power, torque and ignition are obtained for Pertalite, Pertamax and Pertamax Turbo fuels. Regarding exhaust gas, the results showed that Pertamax fuel had greater O2 levels than those using Pertalite and Pertamax Turbo fuel. The conclusion of this research is that the highest power and highest torque are obtained from Pertamax Turbo, exhaust gas emission levels vary with each fuel depending on engine speed.

Keywords: fuel, power, torque and exhaust gas

ANALISA ANODISASI PADA ALUMINIUM 7075 T651 TERHADAP LAJU KOROSI DI FLOOR BEAM PESAWAT KOMERSIL MENGGUNAKAN METODE WEIGHT LOSS

Ridha Siddiq — 2025-05-05

Pesawat terbang merupakan salah satu alat transportasi yang penting sekarang ini karena sangat cepat dibandingkan dengan transportasi lainnya. Kelaikan pesawat ditentukan dari perawatannya. Salah satu perintah perawatan yaitu inspeksi pada struktur area dibawah lavatory yang menggunakan material aluminium 7075 T651. Struktur dibawah lavatory ini sering terjadi korosi karena kelembabannya. Korosi terjadi akibat adanya reaksi oksidasi dan reduksi antara material dengan lingkungannya. Pencegahan korosi pada struktur pesawat ini dilakukan dengan pengaplikasian inhibitor alodine. Korosi juga dapat dicegah dengan perlakuan anodisasi. Pada penelitian ini dilakukan pengujian laju korosi aluminium 7075 T651 dengan perlakuan proteksi anodisasi dan inhibitor alodine dengan metode weight loss. Perendaman dilakukan dalam periode waktu 2, 4, dan 6 hari di media korosif HCl 0,5 M. Hasil penelitian diperoleh bahwa laju korosi aluminium 7075 T651 dengan perlakuan proteksi anodisasi lebih lambat dibandingkan dengan proteksi inhibitor alodine. Hal ini dikarenakan lapisan pasif oksida yang terbentuk pada proses anodisasi lebih tebal dan keras. Pada perendaman dengan periode waktu 2 hari didapatkan laju korosi aluminium 7075 T651 dengan proteksi anodisasi dan inhibitor alodine masing-masing 28,19909 mm/y dan 33,47375 mm/y, kemudian perendaman periode 4 hari masing-masing 16,01769 mm/y dan 18,44014 mm/y, selanjutnya pada perendaman 6 hari masing-masing 12,37905 dan 13,54707. Dari perhitungan laju korosi ini didapatkan semakin lama waktu perendaman, semakin lambat laju korosi yang terjadi. Hal ini terjadi karena terbentuknya produk korosi berupa endapan yang dapat memperlambat laju korosi yang terjadi.

Kata kunci : Aluminium 7075 T651, laju korosi, anodisasi, weight loss