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Frangky Silitonga
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Kampus Akademi Militer/ AKMIL Jalan Gatot Subroto Jurangombo Selatan Magelang Selatan, Seneng Satu, Banyurojo, Kec. Mertoyudan, Kabupaten Magelang, Jawa Tengah 56172
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Jurnal Mekanikasista
Published by PPM Sdirjianbang Akademi Militer
ISSN : 23547308     EISSN : 29635365     DOI : -
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Mekanikasista jurnal yang mempublikasikan dan mewadahi hasil penelitian bidang teknik mesin yang berkaitan dengan perkembangan teknologi miiter yang berfokus pada teknik mesin secara umum. Jurnal ini mempublikasi hasil penelitian yang dilakukan civitas Akmil ataupun berkolaborasi dengan institusi di luar Akmil. Penulis dalam jurnal ini terdiri dari Dosen, Praktisi dan Taruna. Semua hasil penelitian yang akan dipublikasi harus melewati proses review oleh reviwer sebagaimana telah di juntuk, tugas dan janggung jawabnya oleh Penangung Jurnal Mekanikasista. Terbit dua Kali dalam setahun pada setiap bulan Nopember dan Mei
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 6 Documents
 1 
Search results for , issue "Vol. 12 No. 2 (2025): MEI 2025" : 6 Documents clear
PERENCANAAN PENGGANTI DUDUKAN VALVE PADA SEPEDA MOTOR HONDA CB 100 CC Oktosatrio, Suhendro; Sugihandoko; TjandraKusuma , Taufan
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.v12i2.305

Abstract

The Military Academy has high vehicle mobility, particularly motorcycles that are intensively used as a means of transportation within the academy environment. High usage leads to wear and tear on engine components, especially the valve seat, which can affect fuel efficiency and engine power. This study aims to analyze the replacement material for the valve seat on a Honda CB 100 CC motorcycle through material composition testing, hardness testing, and microstructure analysis. The research results indicate that the original valve seat is made of an alloy steel containing chromium and a small amount of nickel, with characteristics similar to the XW-5 material produced by Krakatau Steel. The microstructure analysis reveals a dominance of ferrite and pearlite, which can lead to material brittleness at high temperatures. Therefore, selecting a material that is more heat- and wear-resistant is crucial in designing a replacement valve seat. This study is expected to provide a solution for maintaining and improving the efficiency of motorcycles at the Military Academy while addressing the issue of spare part shortages.  
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.  
PENGARUH PENGGANTIAN KOIL SEPEDA MOTOR GL 100 DENGAN KOIL MOBIL LAND ROVER TERHADAP KONSUMSI BAHAN BAKAR Aryananta Lufti; Santoso, Edy Budi; Nurtjahyono
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.v12i2.307

Abstract

The ignition coil in a motorcycle functions to increase the electrical voltage from a 12-volt battery to thousands of volts, which is then delivered to the spark plug to generate a spark for the combustion process. This study analyzes the effect of replacing a motorcycle ignition coil with a car ignition coil on fuel consumption. The experiment was conducted using several variables, including engine speed, fuel consumption time, and power output. The results indicate that an engine using a car ignition coil produces greater power than one using a motorcycle coil, while also being more fuel-efficient. This is due to the stronger and more efficient ignition provided by the car coil, which enhances combustion efficiency and reduces fuel wastage
PERENCANAAN ULANG RODA GIGI PINION PADA GARDAN BELAKANG KENDARAAN JEEP BJ-212 Wijanarko, Heri; Sugihandoko; Aryananta Lufti
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.v12i2.308

Abstract

Gears function to transmit high power and precise rotation through interlocking teeth. Gears are superior to other transmission systems as they are more compact, capable of transmitting large power with high efficiency, and have a minimal risk of slipping. Additionally, gears can withstand higher loads and allow for speed variations as needed. One commonly used type is the bevel gear, where the pitch surface forms a cone with its apex at the intersection of the shaft axes. Straight bevel gears are the easiest to manufacture and frequently used, although they produce significant noise due to their low contact ratio. Other types of bevel gears include spiral bevel gears, helical bevel gears, and hypoid gears, each with unique characteristics and advantages in transmission systems.  
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.  
ANALISIS PERBANDINGAN UJI KEAUSAN ANTARA KAMPAS KOPLING KUALITAS 1 DENGAN KUALITAS 2 PADA KENDARAAN SUZUKI KATANA Aryananta Lufti; Harjanto, Budi; Silitonga, Frangky
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.v12i2.310

Abstract

To support high mobility and varied terrain, vehicles must have optimal engine performance, especially in the clutch system, which is prone to slipping due to clutch lining wear, increasing the risk of accidents. This study analyzes the wear level of Suzuki Katana clutch linings by comparing KW 1 and KW 2 through hardness, wear, and carbon content tests. The results indicate that KW 1 has a hardness of 251.34 kg/mm², higher than KW 2, which is only 67.82 kg/mm². The wear value of KW 1 is 0.003×10⁻⁴ mm³/kg.m, lower than KW 2 at 0.0086×10⁻³ mm³/kg.m. The carbon content in KW 1 reaches 44.0739%, higher than KW 2 at 32.3462%. These findings show that the higher the hardness of the clutch lining, the lower its wear rate, making KW 1 a better choice as it is more durable and resistant to wear.

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