RANCANG BANGUN MICRO AIR VEHICLE KONFIGURASI TAILLESS

Nowadays, Micro Air Vehicle (MAV) is mostly developed for surveillance purpose, either for military or civilian. In this article, a design and building of a MAV will be presented. A tailless configuration was chosen. The design and build process started with a study of several design parameters of existing MAVs. Then, it is followed by initial sizing, detail design and production of the MAV. In general, the designed MAV could meet the design requirements and objectives stated. Some preliminary tests had shown that the basic flying characteristics was sufficiently good, although further development still has to be done. The design and build process was also able to evaluate the implementation of some aircraft design formula and method being implemented to design MAV

Conceptual Design of a 10-Seater Electric Aircraft

With the increase in population, an increase of transportation needs is inevitable, especially in air travel. There is an underlying problem in this matter that is carbon pollutions. Air travel contributes around 2% of the global emissions. This paper contains the conceptual design of 10-seater electric aircraft that can serve as a cleaner alternative for air travel. The paper will discuss about our objectives and the results of configurations, backed with calculations of proof in all aspects that is needed. In conclusions, this paper presents a conceptual design of 10-seater electric aircraft that have range more than 450 km. The aircraft being designed has a mid-wing three surface configuration with a MTOW of 7250 kg

Analisis Fase Transisi Tail Sitter VTOL UAV VT-1

Tail Sitter merupakan salah satu konfigurasi VTOL yang sederhana bila dilihat dari mekanisme VTOL-nya. UAV dengan konfigurasi ini masih dalam pengembangan, sehingga konfigurasi ini menarik untuk digunakan dalam perancangan awal UAV. Konfigurasi Tail Sitter menawarkan kemampuan untuk takeoff dan landing secara vertikal dan kemampuan untuk terbang horisontal secara efisien seperti halnya konfigurasi konvensional. Proses perancangan diawali dengan meninjau hal-hal yang mempengaruhi pesawat dengan konfigurasi ini untuk selanjutnya dirancang dengan menggunakan metode yang umum dilakukan untuk merancang pesawat konvensional dan pesawat model. Proses transisi dari terbang vertikal dan horisontal juga ditinjau. Proses transisi dianalisis dengan menggunakan metode kesetimbangan gaya. Melalu analysis tersebut didapatkan hasil berupa kebutyhan dan ketersediaan days propulsiHlm. 288-29

RANCANG BANGUN MODEL WAHANA HOVERWING XHW-1

ABSTRACTHoverwing craft is a combination of hovercraft and WiSE-craft. Hoverwing craft operation has transition phase from air cushion lift to aerodynammic lift, and vice versa. A Hovering model, named XHW-1, was designed and built to understand further the design problem related to this kind of vehicle and to observe the transition phase. To simplify construction, manufacture and testing, but without reducing the uniqueness of the vehicle, the model was designed to be operated on a flat surface. The design considered hovercraft related aspect and aircraft aspect as well. The configuration chosen was monohull. The model weight 755 gr, has 1.2 m wing span, and 20 x 30 cm air cushion. Preliminary test showed that air cushion could function properly and that model could reach 3 m/s forward speed.ABSTRAKWahana Hoverwing merupakan perpaduan antara wahana hovercraft dengan wahana WISE-craft. Pada wahana Hoverwing terjadi fase transisi atau fase peralihan dari fase hover menggunakan gaya angkat bantalan udara ke fase terbang airborne murni menggunakan gaya angkat aerodinamik yang dihasilkan oleh sayap, dan sebaliknya. Sebuah model hoverwing XHW-1 dirancang bangun untuk dapat mengetahui lebih jauh mengenai permasalahan perancangan wahana hoverwing dan untuk dapat mengamati fenomena fase transisi ini. Untuk memudahkan konstruksi, pembuatan dan pengujiannya, namun tanpa menghilangkan kekhususan dari wahana ini, maka model dirancang untuk diterbangkan di atas permukaan lantai datar. Model dirancang dengan memperhatikan pertimbangan perancangan hovercraft dan pesawat terbang. Konfigurasi yang dipilih adalah konfigurasi monohull. Model memiliki berat 755 gr dengan panjang span sayap 1,2 m dan ukuran bantalan udara 20 x 30 cm. Pengujian model menunjukkan bahwa bantalan udara dapat bekerja dengan baik dan model dapat melaju dengan kecepatan sekitar 3 m/s.Hal. 147-158:ilus.; 30 c

Glider Uncentered Drag Polar Estimation Based on Flight Manual Data

Abstract: Gliders or sail planes are designed to fly as efficient as possible. Three parameters, namely: CL min, CD min, and e are the factors that determine the aerodynamic efficiency of a glider.This paper presents a method to estimate the value of the determining parameters by reconstructing the drag polar curve from a given hodograph. The drag polar curve is assumed to have an uncentered polar form, and the parameters are obtained using the genetic algorithm optimization tool from MATLAB. Five gliders are succesfully identified, and the results are in a good agreement with several references.The results can further be used as a reference in defining requirements and objectives (DR0s) of glider.Hal. 118-125: ilus.

UJI AERODINAMIK MODEL KAPAL BERSAYAP WING IN SURFACE EFFECT SEBAGAI INPUT KAJIAN GERAK PLANNING MENJELANG TAKE-OFF

Hal. 1-11:ilus.; 30 c

Water level control of small-scale recirculating aquaculture system with protein skimmer using fuzzy logic controller

<p>The recirculating aquaculture system (RAS) is a land-based aquaculture facility, either open-air or indoors, that minimizes water consumption by filtering, adapting, and reusing water. Solid organic matter from fish waste and food waste directly becomes waste that needs to be eliminated because it is a source of increasing total ammonia nitrogen (TAN), total suspended solids (TSS), total dissolved solids (TDS), and also has an impact on reducing dissolved oxygen (DO). RAS requires a water level control system so the fish tank does not experience water shortages or floods, disrupting the aquatic aquaculture ecosystem. In this study, small-scale RAS is modeled using a 3-coupled tanks system approach with a tank configuration that follows the most straightforward RAS water recirculation process (fish tank, mechanic filter, biofilter). Clean water from the reservoir flows into the fish tank through a protein skimmer. This study applies the fuzzy logic controller (FLC) to control the water level in the protein skimmer and biofilter tanks by controlling the position of several valves where the placement positions of the valves have been determined according to system requirements. The study results show that the tuned single-input FLC has the best average output response characteristics with ts=50, h1ss=49.98, ess=0.02 in protein skimmer and ts=4700, h1ss=39.75, ess=0.25 in the tank system.</p&gt