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All Journal E-Dimas: Jurnal Pengabdian kepada Masyarakat Jurnal Teknologi Dirgantara Jurnal Teknologi Kedirgantaraan (JTK) Bubungan Tinggi: Jurnal Pengabdian Masyarakat Jurnal Bakti Bagi Bangsa Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Eduvest - Journal of Universal Studies Jurnal Mahasiswa Dirgantara Jurnal Bakti Dirgantara Indonesian Journal of Aerospace
Budi Aji Warsiyanto
Universitas Dirgantara Marsekal Suryadarma
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Transonic Buffet Effects on Shockwave-Induced Lift Stress Response and Fatigue Life of the SC(2)-0714 Supercritical Budi Aji Warsiyanto; Agustianingsih, Riskha
Jurnal Teknologi Kedirgantaraan Vol 10 No 2 (2025): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jtk.v10i2.367

Abstract

Transonic buffet, triggered by shockwave–boundary layer interaction, produces oscillations that cause unsteady lift fluctuations, structural stresses, and accelerated fatigue damage. Understanding this chain—from shockwave to lift, stress, and fatigue—is critical for the durability of modern aircraft wings, especially those employing supercritical airfoils. This study investigates the SC(2)-0714 supercritical airfoil using CFD in ANSYS Fluent at Mach 0.8 with AoA 2°, 4°, and 6°, combined with structural and fatigue analysis in Abaqus and Fe-Safe. Results show stress levels between 1.26 and 12.6 MPa, well below the yield strength of Al 2024-T3, confirming safe static margins. However, fatigue life declined sharply with AoA, from 177,868 cycles at 2° to 130,282 cycles at 6°. These findings emphasize that while stresses remain within limits, transonic buffet–induced lift fluctuations critically reduce fatigue life, underscoring the urgency of incorporating buffet effects into structural durability assessments and airfoil design.
Analisis Pemeliharaan Scuff Plate Door Pesawat Menggunakan Critical Path Method Fawwaz, Muhammad Abhista; Freddy Franciscus; Warsiyanto, Budi Aji
Jurnal Mahasiswa Dirgantara Vol. 4 No. 2 (2025): Jurnal Mahasiswa Dirgantara
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jmd.v4i2.159

Abstract

Pemeliharaan pesawat yang efisien merupakan faktor penting dalam menjaga keselamatan dan keberlanjutan operasional, termasuk pada komponen minor seperti scuff plate door yang berfungsi sebagai pelindung struktural dari abrasi dan benturan. Meskipun komponen ini tergolong wear part, keterlambatan dalam pemeliharaannya dapat berkontribusi terhadap peningkatan downtime pesawat. Penelitian ini bertujuan menganalisis optimasi waktu pemeliharaan Scuff Plate Door pada pesawat Boeing 737–300 menggunakan Critical Path Method (CPM) sebagai model penjadwalan deterministik. Penelitian menggunakan pendekatan kuantitatif-deskriptif dengan pemodelan jaringan kerja berdasarkan data aktivitas pemeliharaan aktual yang diperoleh melalui observasi lapangan dan wawancara teknisi berpengalaman di fasilitas perawatan. Sebanyak 15 aktivitas pemeliharaan dimodelkan dalam jaringan CPM untuk menentukan Earliest Start (ES), Earliest Finish (EF), Latest Start (LS), Latest Finish (LF), serta float. Hasil analisis menunjukkan bahwa jalur kritis terdiri dari 10 aktivitas utama dengan total durasi 75 jam, lebih rendah dibandingkan durasi aktual sebesar 86 jam. Implementasi CPM berpotensi menurunkan Turn Around Time (TAT) dari 11,47 hari kerja menjadi 10 hari kerja.Temuan ini menunjukkan bahwa penerapan CPM pada pemeliharaan komponen minor dapat meningkatkan efisiensi waktu dan mendukung optimalisasi perencanaan sumber daya tanpa mengubah prosedur teknis perawatan yang berlaku.   Efficient aircraft maintenance plays a critical role in ensuring operational safety and minimizing aircraft downtime, including for minor components such as the scuff plate door, which functions as a structural protective element against abrasion and impact. Although classified as a wear component, delays in its maintenance may contribute to extended aircraft ground time and reduced operational availability. This study aims to analyze maintenance time optimization of the Boeing 737–300 Scuff Plate Door using the Critical Path Method (CPM) as a deterministic scheduling model. A quantitative-descriptive approach was employed through network modeling of maintenance activities based on actual operational data obtained from field observations and structured interviews with experienced maintenance technicians. Fifteen maintenance activities were structured into a CPM network to determine the Earliest Start (ES), Earliest Finish (EF), Latest Start (LS), Latest Finish (LF), and total float for each task. The analysis identified ten critical activities forming the critical path with a total duration of 75 hours, compared to the recorded actual duration of 86 hours. The implementation of CPM demonstrates potential to reduce the Turn Around Time (TAT) from 11.47 working days to 10 working days. The findings indicate that applying CPM to minor structural component maintenance can improve scheduling efficiency and resource planning without altering established technical maintenance procedures, thereby supporting more reliable aircraft operational performance.
Analisis Analisis Insiden Drone PIXYZ RTK X-245 Skymagic pada Acara Drone Light Show Bundaran HI Tahun Baru 2025 Alrasyid, Mochammad Rafihan; Martina, Ayu; Warsiyanto, Budi Aji
Jurnal Mahasiswa Dirgantara Vol. 4 No. 2 (2025): Jurnal Mahasiswa Dirgantara
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jmd.v4i2.190

Abstract

Insiden jatuhnya 22 unit drone PiXYZ RTK X-245 pada uji coba Drone Light Show di kawasan Bundaran Hotel Indonesia menjelang Tahun Baru 2025 menyoroti tantangan keselamatan operasi drone massal di wilayah urban padat. Lingkungan perkotaan dengan efek urban canyon dan kepadatan spektrum frekuensi meningkatkan risiko gangguan simultan pada sistem navigasi Real Time Kinematic (RTK) dan komunikasi Command and Control (C2), yang dapat memicu kegagalan sistem berantai. Penelitian ini bertujuan menganalisis akar penyebab insiden dari aspek teknis, manusia, prosedural, dan lingkungan, serta mengevaluasi keandalan sistem failsafe dan kesesuaian mitigasi risiko terhadap karakteristik operasi urban. Metode penelitian menggunakan pendekatan kualitatif deskriptif dengan Root Cause Analysis (RCA) berbasis diagram fishbone, didukung oleh laporan insiden operator, observasi regulator, dokumen mitigasi risiko, analisis teknis sistem, serta data meteorologi. Hasil analisis menunjukkan bahwa hilangnya RTK dan C2 secara bersamaan dipengaruhi oleh efek multipath GNSS dan interferensi frekuensi pita 2,4 GHz. Selain itu, sistem failsafe belum dilengkapi navigasi alternatif, logika pemulihan bertahap, maupun mekanisme override manual yang memadai. Dokumen mitigasi risiko juga belum mencantumkan analisis spektrum dan simulasi kehilangan sinyal massal yang kontekstual. Penelitian ini menyimpulkan bahwa desain failsafe dan mitigasi risiko yang ada belum memadai untuk operasi drone massal di wilayah urban, sehingga diperlukan pendekatan mitigasi adaptif yang selaras dengan regulasi nasional.   The crash of 22 PiXYZ RTK X-245 drones during a Drone Light Show rehearsal at Bundaran Hotel Indonesia prior to the 2025 New Year highlights critical safety challenges in large-scale drone operations within dense urban environments. Urban canyon effects and high radio-frequency congestion increase the risk of simultaneous degradation of Real Time Kinematic (RTK) navigation and Command and Control (C2) communication, potentially triggering cascading system failures. This study aims to analyze the root causes of the incident from technical, human, procedural, and environmental perspectives and to evaluate the reliability of the implemented failsafe system and the adequacy of risk mitigation measures for urban operations. A qualitative descriptive approach was applied using Root Cause Analysis (RCA) with a fishbone diagram, supported by operator incident reports, regulator observations, technical documentation, risk mitigation records, and meteorological data. The results indicate that concurrent RTK and C2 signal loss was primarily driven by GNSS multipath effects and severe interference in the 2.4 GHz frequency band. Furthermore, the failsafe system lacked alternative navigation capabilities, progressive recovery logic, and effective manual override mechanisms. Existing risk mitigation documents also failed to include spectrum analysis and mass signal-loss simulations tailored to urban conditions. This study concludes that current failsafe designs and mitigation strategies remain insufficient for safe large-scale drone operations in urban areas, emphasizing the need for adaptive, context-specific mitigation aligned with national regulations.
Co-Authors A B Utama A Nurrohmad* Ajie Erlangga Antariksa Algazali, Febri Alrasyid, Mochammad Rafihan amat chaeroni Aswan Tajuddin Ayu Martina Ayu Martina, Ayu Candra Pranoto Endah Yuniarti, Endah Eros Ray Fairuza, Syarifah Fawwaz, Muhammad Abhista fitriansyah, Rizky Freddy, Franciscus Maulana, Ichsan muftiarifin Muhamad Jayadi Muhammad Hadi Widanto Musthofa, Ilham nugraha, sultan Nurrohmad, Abian Putera, Rizky Akmal R Fitriansyah Rafika Arum Sari Riskha Agustianingsih Rizki, Alfan S A Sitompul Sahril Afandi S Sari, Rafika Arum Simon Sindhu Hendradjaja Sitompul, Sahril Afandi Sultan Nugraha A Tambunan, Pangihutan Utama, Agus Bayu