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Vortex
Published by Institut Teknologi Dirgantara Adisutjipto
ISSN : 27216152     EISSN : 30217601     DOI : https://doi.org/10.28989/vortex
Core Subject : Science, Engineering,
Aerospace Engineering Earth & Planetary Sciences Energy Materials Science & Nanotechnology Mechanical Engineering
Vortex merupakan jurnal ilmiah dalam diang dirgantara dengan cakupan Perancangan Pesawat Terbang, Perawatan Pesawat Terbang, Operasi Penerbangan, Mesin Pesawat Terbang dan Elektronika Penerbangan
Arjuna Subject : Ilmu Material (semua kategori) - Logam dan Paduan Logam
Articles 86 Documents
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SIMULASI NUMERIK KARAKTERISTIK AERODINAMIKA PADA AIRFOIL NACA 4415 DENGAN MEMPERTIMBANGKAN GROUND EFFECT Hayuningtyas, Rr Saskia Rianasari; Nugroho, Farhan Fathori; Jalaali, Bahrul
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1339

Abstract

Ground effect phenomenon is found when the lift-device such as wing, is placed near the ground. This phenomenon influences the aerodynamics characteristic whereby its appearance is important to be investigated. This work aims to study the influence of ground effect towards aerodynamics characteristion on the NACA4415 airfoil by varying the airfoil’s angle of attack (AoA) as well as the height of ground proximity. Numerical approach conducted on Fluent was carried out while steady assumption, moving wall boundary, and Spalart-Allmaras turbulence model were utilized. The outcomes were aerodynamics characteristic represented by lift and drag coefficients. The results showed that maximum  was 1.736 on AoA 15o while maximum  was 0.0108 on AoA 18o respectively. It also found that ground proximity also was affecting the values of  and . On the height of 0.05 chord, maximum characteristic of lift was obtained while maximum drag was on the 0.8 chord at AoA 18o. It caused by airflow underneath the airfoil was faster due to the ground effect revaling the nozzle-effect, therefore the pressure was higher as according to the Bernoulli’s formulation. On the other hand, drag was related to the vortex generation in which AoA more influental than that of height. This work is hopefully beneficial as initial reference on the Wing-in-Ground (WIG) craft design, in particular on the airfoil selection. 
ANALISIS PERBANDINGAN KEPUASAN PENUMPANG PADA MASKAPAI PENERBANGAN YANG BEROPERASI DI BANDARA SO’A Dhaka, Nikolaus Meo; Nurdin, Riani; Poerwanto, Eko
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1422

Abstract

Bandara Udara So’a Bajawa merupakan salah satu bandara udara domestik di pulau Flores kabupaten Ngada, NTT. Terdapat 3 maskapai komersil yang beroperasi di bandara So’a dan tergolong dalam kategori low cost carrier (LCC) yaitu PT. Lion Air, PT. Citilink, dan PT. TransNusa Aviation Mandiri. Bandara Udara So’a bajawa merupakan salah satu bandara udara domestik di pulau Flores kabupaten Ngada, NTT. Terdapat 3 maskapai komersil yang beroperasi di bandara So’a dan tergolong dalam kategori low cost carrier (LCC) yaitu PT. Lion Air, PT. Citilink, dan PT. TransNusa Aviation Mandiri. Kualitas layanan yang optimal dan presepsi harga diharapkan mampu memenuhi harapan penumpang yang menggunakan 3 maskapai yang beroperasi di bandara so’a, untuk itu guna mengetahui kepuasan penumpang penelitian kuantitatif, Data yang digunakan dalam penelitian ini merupakan data primer yang diperoleh melalui pembagian kuesioner kepada penumpang pengguna ketiga maskapai yang beroperasi di bandara So’a. Teknik analisis data yang diterapkan dalam penelitian ini adalah analisis regresi linier berganda menggunakan SPSS versi 16.0 sebagai alat bantu pengolahan data. Hasil penelitian menunjukkan bahwa Lion Air lebih memuaskan dibandingkan dengan Cititlink dan TransNusa.
SISTEM PAKAR DIAGNOSA HAMA DAN PENYAKIT TANAMAN JAMUR TIRAM PUTIH MENGGUNAKAN METODE CERTAINTY FACTOR DENGAN PENELUSURAN FORWARD CHAINING Wulandari, Via Febri; Riyadi, Ahmad; Hastono, Tri
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1467

Abstract

Jamur tiram merupakan salah satu jamur yang enak dimakan dan mempunyai kandungan gizi yang cukup tinggi. Tidak mengherankan bila jenis jamur ini sekarang banyak dibudidayakan. Adapun jenis jamur tiram yang banyak dibudidayakan antara lain jamur tiram putih, jamur tiram abu-abu, jamur tiram cokelat, dan jamur tiram merah. Dalam bisnis budidaya jamur tiram ternyata tidak lepas dari resiko kerugian yang muncul jika petani kurang pengetahuan mengenai budidaya jamur tiram. Potensi kerugian salah satunya karena hama dan penyakit jamur tiram. Diperlukan kehadiran pakar untuk mengatasi hal tersebut. Penelitian ini berusaha memberikan solusi untuk permasalahan tersebut. Metode yang digunakan pada penelitian adalah metode centainty factor dengan penelusuran forward chaining. Hasil penelitian menunjukkan sistem yang diusulkan sudah sesuai harapan dengan tingkat akurasi sistem sebesar 86%.
ANALISIS PERFORMA RUNWAY PADA BANDAR UDARA TANJUNG API AMPANA DENGAN METODE ACN-PCN K Himran, Sarah Safira; Mulyani, Sri; Khanif R, Fajar
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1528

Abstract

Bandar Udara Tanjung Api Ampana merupakan bandara yang cukup tingkat pelayanan terhadap arus penumpang dan barang yang digunakan untuk penerbangan ke berbagai wilayah di kota Ampana – Palu – Makasar. Dengan kebutuhan operasional penerbangan yang padat, kemampuan kapasitas muat pesawat yang diijinkan dan kekuatan runway dalam menerima pembebanan pesawat pada saat takeoff maupun landing. Maka penelitian ini dititik beratkan pada analisa berat operasional pesawat terbang terhadap kemampuan kekuatan runway di Bandar Udara Tanjung Api Ampana dengan menggunakan perhitungan ACN – PCN. Metode yang digunakan adalah metode ACN-PCN serta metode ARFL. Hasil menunjukkan hubungan antara berat take-off pesawat, PCN, serta panjang landasan. Pada analisa maksimum berat operasional yang dibatasi PCN didapatkan nilai maksimum yang diijinkan di Bandara tersebut dengan batasan kekuatan runway sesuai dengan jenis dan tipe pesawatnya. Hasil analisa runway strength didapatkan pada semua jenis dan tipe pesawat sesuai dengan operasional penerbangan di Bandar Udara Tanjung Api Ampana dapat menggunakan nilai maximum takeoff mass yang telah ditetapkan pada Tabel ACN Jeppesen. Dan berdasarkan analisis, panjang runway untuk pesawat ATR 500, CESSNA 208, dan HERCULES C-130 dapat dilayani oleh Bandara Tanjung Api Ampana dengan panjang runway nya. Agar pesawat jenis tersebut dapat take-off dan landing dengan aman.
REKOMENDASI PERAWATAN KOMPONEN AIR CYCLE MACHINE (ACM) PADA PESAWAT B737-900ER Anisafitri, Berni; Rahmawati, Fajar Khanif; Mulyani, Sri
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1532

Abstract

Analysis with the Weibull distribution method shows that the right treatment recommendations for treating air cycle machine (ACM) in the form of category preventive maintenancetime directed (TD), due to category preventive maintenanceTime Directed (TD) is a category of preventive maintenance that can be carried out if the time variable of a component or system is known and directly aims to prevent damage.
IDENTIFIKASI KEGAGALAN PADA KOMPONEN PITOT PROBE BOEING 737-900ER Cristhina, Cristhina; Mulyani, Sri; Priyahapsara, Istyawan
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1533

Abstract

Based on Boeing 737-900ER unscheduled removal data of pitot probe 0851HT-1 January, 2020 to November, 2021 found 14 removal for pitot probe with one of the defect is “pitot light on”. This indicate that there is a problem with the component and can disrupt the pilot and delay the aircraft. Knowing the result of failure identification and the type of failure be the aim of this research. Analysis using Failure Mode and Effect Analysis used to identify failure modes, causes and effects of failure, severity, occurrence, and detection ranking so that the risk priority number obtained. Based on the FMEA Worksheet, there are 8 failure modes that occur on the pitot probe with the highest Risk Priority Number is 126 on mode “IAS AND ALT DISAGREE”.
ANALISIS KESIAPAN PKP-PK BANDAR UDARA INTERNASIONAL BANYUWANGI DALAM MENDUKUNG PENANGGULANGAN KEADAAN DARURAT Hilmy, Muhammad Nur; Gunawan, Gunawan; Adiputra, Bangga Dirgantara
Vortex Vol 4, No 1 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i1.1457

Abstract

PKP-PK is a unit that must be owned by every airport. This unit is tasked with carrying out aviation accident rescue and fire fighting in the area or around the airport. Seeing the importance of this unit, it is necessary to conduct research on emergency service facilities, find out the reaction time, analyze PKP-PK categories, analyze fire risk management, and the development of this unit. This research was conducted at the PKP-PK unit located at Bayuwangi International Airport. The research method used is descriptive quantitative where data is obtained from the results of questionnaires given to PKP-PK personnel. These data are then compared with Regulation Nomor KP 14 Tahun 2015 which is used to assess the readiness of the PKP-PK. Whereas for risk mapping using the FAA Risk Matrix table. The results show that there is still a shortage of operational facilities while the reaction time and PKP-PK categories are in accordance with regulations. Risk mapping obtains 4 events that have a potential hazard.
ANALISIS BENDING PADA KOMPOSIT SERAT ALAM DAUN AGEL DENGAN RESIN EPOXY Sahuburua, Stevward Norenssio; Hartini, Dwi; Adiputra, Bangga Dirgantara
Vortex Vol 4, No 2 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i2.1696

Abstract

The use of composite materials, especially those developed by natural fibers in various equipment, has begun to develop a lot, the use of natural agel leaf fibers as composite materials can reduce the use of synthetic materials and increase the utilization of agel leaf natural fibers which are still a lot of wasted. This study aims to determine the stages or processes of agel leaf natural fiber composite using 2 methods of hand lay up, vacuum bag and to determine the value of the bending strength of agel leaf natural fiber material between variations of the epoxy matrix in the direction of the fibers 0^°  and 〖90〗^°.Based on the data from the test results, it can be concluded that the average value of maximum bending strength in agel leaf natural fiber composites using the vacuum bag manufacturing method with a volume fraction of 60% and fiber direction 0^°  and 〖90〗^° has an average maximum bending strength value that is the highest, namely 11.006 MPa and 11.057 MPa and the composite of agel leaf natural fiber using the hand lay up method (non vacuum bag) with a volume fraction of 50%, 60%, 70% and fiber direction 0^° has the lowest average maximum bending strength values of 3.413 MPa, 5.404 MPa, 4.625 MPa.
GROB G 120 TP-A AIRCRAFT BETA SYSTEM ANALYSIS USING FTA (FAULT TREE ANALYSIS) METHOD Rahmawati, Fajar Khanif; Priyahapsara, Istyawan; Funny, Rindu Alriavindra; Wati, Denisa Trisma
Vortex Vol 4, No 2 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i2.1652

Abstract

Grob G 120 TP - A beta system aircraft is a system that regulates the size of the angle on the propeller. 42 failures occurred in the beta system from August 2016 to May 2021, resulting in the beta system having to be replaced even before reaching its 2500 flight hour age limit. Using the FTA (Fault Tree Analysis) method, which begins with defining the failure and determining the boundary conditions of the beta system, describing the fault tree model, identifying the minimum cut set from the fault tree, performing a qualitative analysis of the faults tree, and doing a quantitative analysis of the fault tree, it can be seen that the failure that often occurs in the beta system of the Grob G 120 TP-A aircraft is the occurrence of high oil temperature over 84 ℃, the qualitative analysis found 12 causes of failure on the beta system, and based on quantitative analysis obtained probability the occurrence of beta system failure is 0.76363.
KAJIAN POTENSI PEMBANGKIT LISTRIK TENAGA SURYA DI BANDARA SULTAN ISKANDAR MUDA BANDA ACEH priyahapsara, istyawan; Pasha, Muhammad Anka
Vortex Vol 4, No 2 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i2.1698

Abstract

Sources of electrical energy in Indonesia still use a lot of conversion results from fossil energy such as coal, gas and oil. This fossil energy source is getting less and less and the price keeps going up and contributes a lot of carbon gas emissions that are released into the air, renewable energy, such as solar energy, wind, hydropower, and biomass are alternative energy sources that are environmentally friendly. which needs to be further developed in the future.The author's analysis will take into account the effect of implementing solar panels on several obstacles to the failure of the electricity supply from PLN at Sultan Iskandar Muda International Airport. The purpose of implementing solar panels is to overcome the failure of PLN electricity supply, save electricity costs and reduce carbon gas emissions to the environment in a step to support the concept of an airport with green energy or Eco- Airport, in the calculation method using component analysis, the effect of temperature and also from an economic perspective on the initial investment of the project

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