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Sukahar
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Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Social Sciences Transportation Other

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UJI STRUKTUR BAHAN KAMPAS REM TROMOL PADA KENDARAAN TRUK MITSUBISHI 120 PS MERK MITSUBISHI DAN MERK INDOPARTS Harjanto, Budi; Wijanarko, Heri; Sukahar
JURNAL MEKANIKASISTA Vol. 12 No. 1 (2024): NOPEMBER 2024
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v12i1.240

Abstract

The Mitsubishi 120 PS truck is one of the service vehicles at the Military Academy. This truck is frequently used to transport cadets, particularly to training areas. Given the challenging terrain cadets must navigate, including both uphill and downhill roads, an optimal and consistent braking system is required. This study aims to analyze the wear rate of the drum brake pads used in the Mitsubishi 120 PS truck. The research focuses on determining the hardness, wear rate, and carbon content of the drum brake pads of the Mitsubishi brand compared to the Indoparts brand through hardness, wear, and material composition tests. The test results showed that the hardness of Mitsubishi brake pads is 78.06 kg/mm², which is higher than Indoparts at 58.25 kg/mm². The wear rate for Mitsubishi pads is 5.79x10⁻⁴ mm³/kg.m, which is lower than Indoparts at 1.1599x10⁻³ mm³/kg.m. The carbon content in Mitsubishi pads is 35.48%, higher than Indoparts at 33.18%. This indicates that the harder the brake pad, the lower its wear rate. Therefore, Mitsubishi drum brake pads are more durable and recommended due to their higher resistance to wear.  
PENGARUH CELAH ELEKTRODE BUSI TERHADAP KINERJA MESIN HONDA GL 100 Harjanto, Budi; Wijanarko, Heri; Sukahar
JURNAL MEKANIKASISTA Vol. 12 No. 2 (2025): MEI 2025
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v12i2.306

Abstract

This study aims to analyze the effect of spark plug electrode gap variations on the performance of the Honda GL 100 105 cc engine at the PAL Akmil workshop. Combustion in a gasoline engine occurs in the combustion chamber due to the spark plug’s electrical discharge, which is influenced by the voltage difference between the central electrode and the ground electrode, as well as the electrode gap. A gap that is too small can hinder flame kernel development, leading to suboptimal combustion and reduced engine performance. The experiment was conducted using an NGK DE8A spark plug with electrode gap variations of 0.6 mm, 0.7 mm, and 0.8 mm, and engine speed variations ranging from 3000 to 9000 rpm, increasing by 1000 rpm, using a dynamometer. The results showed that the highest torque was obtained at a 0.8 mm gap at 6000 rpm, measuring 7.19 Nm, while the lowest torque was recorded at a 0.6 mm gap at 9000 rpm, measuring 4.63 Nm. The highest power output was achieved at a 0.6 mm gap at 8000 rpm, reaching 6.81 HP, while the lowest power was observed at a 0.6 mm gap at 3000 rpm, at 2.75 HP. The highest brake mean effective pressure (BMEP) was recorded at a 0.8 mm gap at 6000 rpm, measuring 1.15 kPa, whereas the lowest BMEP was observed at a 0.6 mm gap at 9000 rpm, at 0.74 kPa. The study concludes that spark plug electrode gap variations significantly affect engine performance, with the optimal gap for torque and BMEP found to be 0.8 mm.  
PERANCANGAN ULANG SISTEM SUSPENSI SHOCKBREAKER PADA KENDARAAN BIMANTARA NENGGALA Sukahar; Hafid, Achmad; Suparja
JURNAL MEKANIKASISTA Vol. 12 No. 2 (2025): MEI 2025
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v12i2.309

Abstract

This study focuses on redesigning the shock absorber suspension system of the Bimantara Nenggala vehicle, which is used as a service vehicle at the Military Academy, to enhance durability on rough road surfaces. The modification was carried out by increasing the diameter of the steel spring wire from 14 mm to 16 mm. The results indicate that this change increased the solid length of the spring from 56 mm to 96 mm, the number of coils from 2.5 to 4.5, and the spring deflection from 39.38 mm to 41.48 mm. This redesign demonstrates that using a 16 mm wire diameter provides better performance compared to the 14 mm wire, with improved durability, deflection, and coil count for optimal suspension efficiency.  
Co-Authors Akhmad Misbakhul Khoir Aryananta Lufti Awal Ramadhani Budi Harjanto Budi Harjanto Dwi Reni Nisvul Lailyningsih Edy Budi Santoso Hafid, Achmad Heri Wijanarko Lumintang, D.Ricky Muad Mu’ad Nisaul Ullum Sugihandoko Suparja SUTIKNO Yusuf Darmawan