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Journal articles on the topic 'Airplanes'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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1

Kuzmin, Yu V. "Passenger airplane manufacturing in the 20th century. Quantitative analysis." Civil Aviation High Technologies 26, no. 3 (June 23, 2023): 8–24. http://dx.doi.org/10.26467/2079-0619-2023-26-3-8-24.

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The statistics on the production and development of passenger airplanes in the world is presented in this article for the first time. The methods for obtaining the results are described, uncertainties of the results are estimated. It is specified what exactly is considered to be a passenger airplane. It is shown that only 60,000 passenger airplanes were built during the entire 20th century. This is less than 3% of the total production of airplanes of all classes. Their total capacity amounts less than 5 million people, or less than a thousandth of the world’s population by the end of the last

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2

Rogalski, Tomasz, and Boguslaw Dołęga. "ALGORITHMS IMPROVING FLYING QUALITIES OF GENERAL AVIATION AIRCRAFT." Aviation 10, no. 2 (June 30, 2006): 17–21. http://dx.doi.org/10.3846/16487788.2006.9635930.

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The dynamic growth of general aviation as a mean of transport over medium distances means that people having no extraordinary qualifications or extraordinary physical or mental abilities more often pilot such types of airplanes. This phenomenon creates the necessity of giving planes flying qualities that allow them to be safely piloted by ordinary people. One way of solving this problem is equipping airplanes with fly‐by‐wire control systems that modify their handling qualities. Then the computer included into such control systems modifies the actions taken by the pilot, making the airplane bo

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Morad, Alaa M. "Multidisciplinary conceptual investigation for integrating stores, not in the original configuration of a subsonic airplane." Journal of Physics: Conference Series 2616, no. 1 (November 1, 2023): 012005. http://dx.doi.org/10.1088/1742-6596/2616/1/012005.

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Abstract Subsonic airplanes are widely used around the world in applications such as pilot training, transportation, sports activities, insect fighting, and field monitoring. This research deals with airplanes that already own the capability of carrying suspended loads. Increasing the airplane’s capabilities and configurations by integrating different suspended loads like smaller or larger external fuel tanks or insecticide tanks that are not in the original configuration of the airplane is a great advantage. This modification can be done without dramatic changes to the airplane and with minim

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Shi, Fan, Fang Qiu, Xiao Li, Yunwei Tang, Ruofei Zhong, and Cankun Yang. "A Method to Detect and Track Moving Airplanes from a Satellite Video." Remote Sensing 12, no. 15 (July 25, 2020): 2390. http://dx.doi.org/10.3390/rs12152390.

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In recent years, satellites capable of capturing videos have been developed and launched to provide high definition satellite videos that enable applications far beyond the capabilities of remotely sensed imagery. Moving object detection and moving object tracking are among the most essential and challenging tasks, but existing studies have mainly focused on vehicles. To accurately detect and then track more complex moving objects, specifically airplanes, we need to address the challenges posed by the new data. First, slow-moving airplanes may cause foreground aperture problem during detection

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Endara Julio, Álvarez, Susan Sardinas Castellón, Parra Nigañes Patricia, Arancibia Marianela, and Nuñes Prado Natalia. "Case report: Thrombosis in children." Hematology & Transfusion International Journal 8, no. 5 (October 30, 2020): 105–6. http://dx.doi.org/10.15406/htij.2020.08.00235.

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Objective: We examined the effects of passenger air transport by regular airplanes for air transportation on blood for transfusion. Materials and methods: Irradiated red blood cell (RBC) solutions were transported by regular passenger airplanes which and were static in the cabin during the flight. Blood samples were evaluated visually and biochemically before and after transport. Hemolysis of the transported samples was compared to that of the non-transported ones. The vibration in the airplanes was also measured using a vibration data logger. Results: There was no significant hemolysis of RBC

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Yakushiji, Koki, Takanori Yokochi, Hiroshi Fujita, and Fumiatsu Yakushiji. "Effects of passenger airplane transport on blood." Hematology & Transfusion International Journal 8, no. 5 (October 30, 2020): 108–9. http://dx.doi.org/10.15406/htij.2020.08.00236.

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Objective: We examined the effects of passenger air transport by regular airplanes for air transportation on blood for transfusion. Materials and methods: Irradiated red blood cell (RBC) solutions were transported by regular passenger airplanes which and were static in the cabin during the flight. Blood samples were evaluated visually and biochemically before and after transport. Hemolysis of the transported samples was compared to that of the non-transported ones. The vibration in the airplanes was also measured using a vibration data logger. Results: There was no significant hemolysis of RBC

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Xiao, Boming. "Analysis on the relation between the vertex angle of a tube airplane and its flying time." Theoretical and Natural Science 5, no. 1 (May 25, 2023): 514–18. http://dx.doi.org/10.54254/2753-8818/5/20230310.

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The tube is a type of airplane that is shaped as a hollow cylinder. In common sense, it seems impossible that an airplane has no wings, however, the tube airplane can fly even longer in the sky comparing with normal airplanes. In this paper, the practical experiment related to Bernoullis theorem and Magnus Force will be introduced. In order to understand those equations more deeply with logic, a paper airplane model called the tube is going to be studied. The author makes the models with different shapes and angles so as to figure out the relationship between the angle of the index and the fly

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8

Kakinuma, Taro, and Masaki Hisada. "A Numerical Study on the Response of a Very Large Floating Airport to Airplane Movement." Eng 4, no. 2 (April 21, 2023): 1236–64. http://dx.doi.org/10.3390/eng4020073.

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Numerical simulations were generated to investigate the response of a floating airport to airplane movement using the nonlinear shallow water equations of velocity potential for water waves interacting with a floating thin plate. First, in the 1D calculations, the airplanes were B747 and B737. At touch-and-go, when the airplane speed is closer to the water wave speed, even B737 produced large waves based on the resonance. The impacts due to both the touchdown and leaving of the airplanes generated other forward and backward waves. At landing, when the airplane speed approached the water wave s

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Sieradzki, Adam, Adam Dziubiński, and Cezary Galiński. "Performance Comparison of the Optimized Inverted Joined Wing Airplane Concept and Classical Configuration Airplanes." Archive of Mechanical Engineering 63, no. 3 (September 1, 2016): 455–70. http://dx.doi.org/10.1515/meceng-2016-0026.

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Abstract The joined wing concept is an unconventional airplane configuration, known since the mid-twenties of the last century. It has several possible advantages, like reduction of the induced drag and weight due to the closed wing concept. The inverted joined wing variant is its rarely considered version, with the front wing being situated above the aft wing. The following paper presents a performance prediction of the recently optimized configuration of this airplane. Flight characteristics obtained numerically were compared with the performance of two classical configuration airplanes of s

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10

A. B. "Paper Airplanes." Departures in Critical Qualitative Research 7, no. 4 (2018): 146–47. http://dx.doi.org/10.1525/dcqr.2018.7.4.146.

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This short poetic response explores my experience performing the play Heavier than Air as a queer teacher; folding my body into these characters, feeling the tensions in the stories, and their resonances with my own. The form of the poem mirrors the process of folding the paper airplanes referenced and used as props throughout the play. As I performed the poem, I folded a paper airplane, and let it take flight on the last line.

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11

Wei, Yajun, Xiaotong Chen, Wanrong Luo, Qingsong Zou, and Xiaopan Zhang. "Innovative flight control explanation and demonstration: bridging theory and practice in secondary education." Physics Education 59, no. 3 (April 10, 2024): 035017. http://dx.doi.org/10.1088/1361-6552/ad3594.

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Abstract How do airplanes turn, pitch, and roll? This fundamental question about airplane control captivates many pupils. Offering a comprehensible explanation to secondary school students is challenging due to the complex nature of fluid dynamics and mechanics. In this paper, we provide an accessible explanation of flight control principles, supported by carefully designed illustrations. Furthermore, we address the gap in educational resources by introducing a novel indoor demonstration apparatus. This design employs universal joints and remote-controlled model airplanes to visually demonstra

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12

Magdy, Ahmed, M. Zakaria, O. Farouk, and Ashraf M. Kamal. "Development and verification of AeroMech tool for rapid estimation of airplane aerodynamic characteristics during early design stages." Journal of Physics: Conference Series 2616, no. 1 (November 1, 2023): 012009. http://dx.doi.org/10.1088/1742-6596/2616/1/012009.

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Abstract The aerodynamic characteristics of airplanes (i.e., coefficients and derivatives) are essential for the airplane design and optimization process. Generally, accurate calculations of these characteristics are complex and time-consuming. However, the level of accuracy can be adjusted depending on the design phase, problem complexity, and available time for analysis. Thus, diverse tools ranging from simple analytical methods to complex numerical simulations are used to calculate these characteristics during different design steps. This paper presents an efficient tool to expedite the cal

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13

Kuzmin, Yuri V. "The role of the USA aviation industry in the development of general aviation." Tambov University Review. Series: Humanities, no. 4 (2022): 1108–20. http://dx.doi.org/10.20310/1810-0201-2022-27-4-1108-1120.

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The history of a relatively little-studied sub-sector of aircraft manufacturing is described: the development and production of general purpose airplanes. Data on 2690 aircraft models and their production are collected by the author. It is shown that the USA share in the production in the 20th century exceeds 80 %, although in 1930–1945 European countries were the leaders. Assumptions are made about the reasons for the change of leaders. The definition of “general purpose airplane” is given with references to the regulatory documents of the USA, European Union and Russia. It is shown that the

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Kuzmin, Yury Viktorovich. "Development of designs of four-seat airplanes in the XX century." Историческая информатика, no. 3 (March 2022): 56–80. http://dx.doi.org/10.7256/2585-7797.2022.3.38633.

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The work is devoted to the analysis of a specific sub-branch of airplane construction and, at the same time, to the search of general laws of technology development. For the first time, a global picture of the development of designs of four-seat airplanes in the XX century is given, priority designs are identified. It is shown that the development of four-seat airplanes goes through two stages: the search (until the end of the 1940s), when popular airplane schemes periodically replaced each other, the airplane characteristics varied greatly, and the second stage of mature technology. In the se

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Coutinho, E., and J. Pereira-Monteiro. "‘Bad Trips’: Airplane Headache not Just in Airplanes?" Cephalalgia 28, no. 9 (September 2008): 986–87. http://dx.doi.org/10.1111/j.1468-2982.2008.01632.x.

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A type of headache associated with altitude variations in airplane travellers is increasingly reported and has recently become a subject of debate for experts. We present a patient with headache related to altitude variations in two different settings: airplane and mountain descent, suggesting that different kinds of triggers for pressure variation can cause the same type of pain.

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Baar, Thomas, and Horst Schulte. "Safety Analysis of Longitudinal Motion Controllers during Climb Flight." Modeling and Analysis of Information Systems 26, no. 4 (December 27, 2019): 488–501. http://dx.doi.org/10.18255/1818-1015-2019-4-488-501.

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During the climb flight of big passenger airplanes, the airplane’s vertical movement, i.e. its pitch angle, results from the elevator deflection angle chosen by the pilot. If the pitch angle becomes too large, the airplane is in danger of an airflow disruption at the wings, which can cause the airplane to crash. In some airplanes, the pilot is assisted by a software whose task is to prevent airflow disruptions. When the pitch angle becomes greater than a certain threshold, the software overrides the pilot’s decisions with respect to the elevator deflection angle and enforces presumably safe va

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Mieloszyk, Jacek, and Cezary Galinski. "Assessment of the Concept of a Propeller Working in a Slot in the Middle of Wing of a Micro Air Vehicle." Archive of Mechanical Engineering 60, no. 2 (June 1, 2013): 269–82. http://dx.doi.org/10.2478/meceng-2013-0017.

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Two configurations of micro-airplanes are compared in this paper. The first, very innovative one, has a propeller working in a slot in the middle of the wing. The second airplane has more classical configuration with a pusher propeller. Advantages and disadvantages of both configurations are evaluated, which makes it possible to assess what are the best possible mission types for each micro-airplane.

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18

Cohen-Nir, D., and R. Marchi. "Preliminary Analysis of Taxiway Deviation Data and Estimates of Airplane Wingtip Collision Probability." Transportation Research Record: Journal of the Transportation Research Board 1850, no. 1 (January 2003): 49–60. http://dx.doi.org/10.3141/1850-06.

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The introduction of new large airplanes (NLAs), initially the Airbus A380, into existing older airports poses a wide range of dimensional clearance issues, primarily related to wingspan and tail height. Many existing airports cannot meet FAA’s Airplane Design Group VI (ADG VI) design standards appropriate to NLA. FAA is conducting ongoing data collection of measured deviations from taxiway centerlines experienced by Boeing-747 airplanes under various weather and visibility conditions, to allow the estimation of the collision risk while taxiing. A preliminary analysis was conducted on the risk

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Hernando, JL, and R. Martínez-Val. "Carrier deck launching of adapted land-based airplanes." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 234, no. 10 (November 22, 2019): 1661–74. http://dx.doi.org/10.1177/0954410019890233.

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VTOL Harrier aircraft has been the basic combat airplane for many Navies, but it will soon be retired from service. Three main alternatives appear: to incorporate another, already existing or under development airplane; to design a completely new aircraft; or to modify an existing land-based airplane to achieve carrier suitability. The present paper is part of a study to assess the feasibility of the third option. In former papers, the authors have addressed, firstly, the compatibility criteria of land-based airplanes with aircraft carriers and, secondly, the details of the approach guidance a

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Al-Mahadin, Aziz, and Serdar Dalkilic. "DEVELOPED CRITERIA TO IMPROVE PILOT REPORTING OF AIRPLANE VORTEX ENCOUNTERS." Aviation 23, no. 4 (February 27, 2020): 133–42. http://dx.doi.org/10.3846/aviation.2019.12038.

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Leading airplane vortices can be hazardous to following airplanes. The regulated minimum separations between following and leading airplanes are sometimes overjudged, hence causing reduction in the capacity of airports. In other instances, they are underjudged and subsequently causing airplane incidences. A vital contribution to the establishment and adjustment of vortex-related minimum airplane separations rely on the identification of vortex encounters through pilot reporting with a manual analysis of flight data from FDRs (flight data recorders). This current process relies on judgment of b

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21

Altamirano, Isabel. "TRAIL Spotlight." DttP: Documents to the People 47, no. 3 (September 12, 2019): 5. http://dx.doi.org/10.5860/dttp.v47i3.7120.

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The first thing that you feel when an airplane lands is the effect of the brakes to slow it down. But, as the report “The Use of Wheel Brakes on Airplanes” points out, the use of brakes had to be proven to be safe before becoming part of standard operating procedures.

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Song, Jae-Hoon, and Han-Lim Choi. "Efficient airplane arrival scheduling using a set partitioning-based branch-and-price method." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 16 (July 19, 2017): 2939–51. http://dx.doi.org/10.1177/0954410017718566.

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This article presents an exact algorithm that is combined with a heuristic method to find the optimal solution for an airplane landing problem. For a given set of airplanes and runways, the objective is to minimize the accumulated deviations from the target landing time of the airplanes. A cost associated with landing either earlier or later than the target landing time is incurred for each airplane within its predetermined time window. In order to manage this type of large-scale optimization problem, a set partitioning formulation that results in a mixed integer linear program is proposed. On

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DeCelles, Katherine A., and Michael I. Norton. "Physical and situational inequality on airplanes predicts air rage." Proceedings of the National Academy of Sciences 113, no. 20 (May 2, 2016): 5588–91. http://dx.doi.org/10.1073/pnas.1521727113.

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We posit that the modern airplane is a social microcosm of class-based society, and that the increasing incidence of “air rage” can be understood through the lens of inequality. Research on inequality typically examines the effects of relatively fixed, macrostructural forms of inequality, such as socioeconomic status; we examine how temporary exposure to both physical and situational inequality, induced by the design of environments, can foster antisocial behavior. We use a complete set of all onboard air rage incidents over several years from a large, international airline to test our predict

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Li, Songlin, Junwen Shao, and Yuze Sun. "Study on vortex generator on automobile and airplane." Theoretical and Natural Science 26, no. 1 (December 20, 2023): 139–44. http://dx.doi.org/10.54254/2753-8818/26/20241049.

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A vortex generator is a compact device that can be installed on automobiles and airplanes to enhance aerodynamic efficiency. The use of vortex generators on automobiles and airplanes is briefly described in this study. It begins by outlining the working theories and categorizations of vortex generators, which reactivate the boundary layer to postpone airflow separation. Second, this study examines the use of vortex generators on automobiles and trucks, positioned at the back of these vehicles to reduce air drag and improve fuel efficiency. Studies show that vortex generators can increase vehic

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Olejnik, Aleksander, Łukasz Kiszkowiak, and Adam Dziubiński. "Aerodynamic analysis of General Aviation airplanes using computational fluid dynamics methods." Mechanik 90, no. 8-9 (September 11, 2017): 802–4. http://dx.doi.org/10.17814/mechanik.2017.8-9.118.

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The problems of an aircraft aerodynamic analysis based on the example of Very Light Aeroplanes and Very Light Jet category airplanes have been presented. A numerical calculations using finite volume method implemented in specialized software were performed. A method of preparing a numerical model of an airplane and the aerodynamic analysis methodology have been presented. An influence of an airplane propulsion on aerodynamic characteristics have been analyzed. A results have been shown in the graphs form of aerodynamic force and moment components as function of angle of attack.

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Fu, Muyi. "Research on the aerodynamic causes of airplane wings." Theoretical and Natural Science 36, no. 1 (May 28, 2024): 77–84. http://dx.doi.org/10.54254/2753-8818/36/20240519.

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As the fastest means of transportation in the globe for people, airplanes are receiving more and more attention in the fields of science and engineering. Experts around the world try to figure out methods of increasing safety for airplanes, while it may elicit an ongoing debate on how to explain wing aerodynamics. This essay delves into the intricate world of wing aerodynamics, first presenting an analysis of forces acting on the airplane which could help provide basic knowledge and serve as background information. Three main theories, Bernoullis equation, Newtons third law, and the Coanda eff

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Hasibuzzaman, MD, and Md Kamrul Hasan. "ANALYSIS OF FLIGHT CHARACTERISTICS OF PAPER AIRPLANES." International Journal of Engineering Applied Sciences and Technology 7, no. 9 (January 1, 2023): 161–66. http://dx.doi.org/10.33564/ijeast.2023.v07i09.024.

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The trajectory of a paper airplane is dependent on its lift and drag performance and aerodynamic stability. Historically, darts were the perfect choice for distance competitions because of their excellent stability, but John Collins has changed this tradition with his incredible design, Susanne, by making a new distance record in 2012. In this paper, differences between this world record design and other typical paper airplanes are represented using typical models of a dart and glider since the wingspan of Susanne fits in between them. Solid models of these three airplanes are created with Sol

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Elova, Dilnoza, and Olimjon Ahmadov. "Bukhara from the history of the events of the organization of the air fleet of modern new technology and the introduction of aircraft." E3S Web of Conferences 515 (2024): 04007. http://dx.doi.org/10.1051/e3sconf/202451504007.

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In 1920-1924, the activities carried out in Bukhara regarding the establishment of the air fleet and the establishment of airplane traffic were covered through the analysis of primary sources and literature. The discovery of airplanes as a means of transport and the beginning of their use is related to the history of countries in Europe such as France and Germany. In 1924, a total of 1,000 passengers, 200 kg of mail, and 5 tons of cargo were transported by air in our country. The history of the establishment of the air fleet and the arrival of the first airplanes in Turkestan dates back to the

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Wang, Jinfeng, and Edwin E. Herricks. "Risk Assessment of Bird–Aircraft Strikes at Commercial Airports." Transportation Research Record: Journal of the Transportation Research Board 2266, no. 1 (January 2012): 78–84. http://dx.doi.org/10.3141/2266-09.

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Bird strikes are a continuing problem in aviation. Despite the number and severity of reported bird strikes, quantification of the effect of contributory factors has been limited because of the absence of data, especially data on bird activity around airfields. The purpose of this study is to provide initial insight into this important problem by combining a number of databases and information resources available at the Seattle–Tacoma International Airport in Washington, including airplane operations, bird strike reports, and the avian radar data on bird movements. Logistic regression and mult

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Sousa, Marcelo Santiago, Pedro Paglione, Roberto Gil Annes Silva, Flavio Luiz Cardoso-Ribeiro, and Sebastião Simões Cunha. "Mathematical model of one flexible transport category aircraft." Aircraft Engineering and Aerospace Technology 89, no. 3 (May 2, 2017): 384–96. http://dx.doi.org/10.1108/aeat-12-2013-0230.

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Purpose The purpose of this paper is to present a mathematical model of one very flexible transport category airplane whose structural dynamics was modeled with the strain-based formulation. This model can be used for the analysis of couplings between the flight dynamics and structural dynamics. Design/methodology/approach The model was developed with the use of Hamiltonian mechanics and strain-based formulation. Nonlinear flight dynamics, nonlinear structural dynamics and inertial couplings are considered. Findings The mathematical model allows the analysis of effects of high structural defor

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Kraus, Jakub, and Ladislav Capoušek. "Transformation of Helicopter PinS Procedures for Airplanes." MAD - Magazine of Aviation Development 1, no. 5 (September 15, 2013): 3. http://dx.doi.org/10.14311/mad.2013.05.01.

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<span style="line-height: 115%; font-family: 'Times New Roman','serif'; font-size: 9pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: Calibri; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-GB">This article deals with the possibility to use existing helicopter Point in Space procedures with minor changes for airplanes. The basis is to find parts of PinS procedures that need to be changed, suggest these changes, and then determine whether the revised procedures could be usable and could bring the benefits for airplane operations</span&

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Bautista-Medina, José Antonio, Rogelio Lozano, and Antonio Osorio-Cordero. "Position Periodic Control of Two Rotating Airplanes." Drones 6, no. 8 (August 19, 2022): 214. http://dx.doi.org/10.3390/drones6080214.

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The increasing development in aerial vehicles shows a wide range of configurations for different requirements. Many of them combine conventional configurations’ features to take advantage of their qualities, such as performing a cruise flight as an airplane and hovering like a helicopter. Thereby, this study analyzes the modeling and control of a pair of fixed-wing airplanes joined together to form a larger rotor that incorporates valuable features in missions with aerial vehicles. The model uses the Lagrange approach to obtain the motion equations in the flight plane, and two control strategi

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Li, Li. "Information Estimation of Civil Airplane in Interference Localization Background." Applied Mechanics and Materials 513-517 (February 2014): 3389–92. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.3389.

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The ground-air communication of civil aviation is interfered by radios, which has seriously endangered the normal flight of civil airplanes. This paper proposes an airplane information estimation algorithm based on the study of the problem of interference localization. Firstly, a novel signal model to accurately estimate parameters of the airplane is proposed. A method of Doppler estimation based on peak searching is proposed, and the 2D-MUSIC algorithm is applied to estimate the azimuth angle and elevation angle. Furthermore, the velocity and location of the airplane are estimated by employin

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Budde, Don, Jochen Hinkelbein, and Douglas D. Boyd. "Analysis of Air Taxi Accidents (20042018) and Associated Human Factors by Aircraft Performance Class." Aerospace Medicine and Human Performance 92, no. 5 (May 1, 2021): 294–302. http://dx.doi.org/10.3357/amhp.5799.2021.

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INTRODUCTION: Air taxis conduct nonscheduled transport and employ aircraft in various performance categories hereafter referred to as low, medium, and high performance, respectively. No study has yet addressed fixed-wing air taxi safety by performance category. Herein, we compared accident rates/occupant injury across air taxi airplane fleets grouped by performance category and identified human factors contributing to fatal accidents for airplanes in that category with the highest mishap rate.METHODS: Accidents (20042018) in the United States were identified from the National Transportation Sa

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Hamid, Ali. "Unsteady nonlinear panel method with mixed boundary conditions." FME Transactions 49, no. 1 (2021): 135–46. http://dx.doi.org/10.5937/fme2101135a.

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A new panel method had been developed to account for unsteady nonlinear subsonic flow. Two boundary conditions were used to solve the potential flow about complex configurations of airplanes. Dirichlet boundary condition and Neumann formulation are frequently applied to the configurations that have thick and thin surfaces respectively. Mixed boundary conditions were used in the present work to simulate the connection between thick fuselage and thin wing surfaces. The matrix of linear equations was solved every time step in a marching technique with Kelvin's theorem for the unsteady wake modeli

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Fakhreddine, Omar, Yousef Gharbia, Javad Farrokhi Derakhshandeh, and A. M. Amer. "Challenges and Solutions of Hydrogen Fuel Cells in Transportation Systems: A Review and Prospects." World Electric Vehicle Journal 14, no. 6 (June 13, 2023): 156. http://dx.doi.org/10.3390/wevj14060156.

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Conventional transportation systems are facing many challenges related to reducing fuel consumption, noise, and pollutants to satisfy rising environmental and economic criteria. These requirements have prompted many researchers and manufacturers in the transportation sector to look for cleaner, more efficient, and more sustainable alternatives. Powertrains based on fuel cell systems could partially or completely replace their conventional counterparts used in all modes of transport, starting from small ones, such as scooters, to large mechanisms such as commercial airplanes. Since hydrogen fue

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Kabakchiev, Hristo, Vera Behar, Ivan Garvanov, Dorina Kabakchieva, Avgust Kabakchiev, and Hermann Rohling. "FSR Systems for Detection of Air Objects Using Cosmic Radio Emissions." Sensors 21, no. 2 (January 11, 2021): 465. http://dx.doi.org/10.3390/s21020465.

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The paper analyses the possibility of Forward Scatter Radar (FSR) systems to detect airplanes using cosmic emission from pulsars and planets (pulsar, Sun, Moon). A suboptimal multichannel algorithm for joint detection and evaluation of the parameters of the forward scattering signal created by an airplane (duration and velocity) is proposed, with preliminary compensation of the powerful direct signal emitted by cosmic sources (pulsar, Sun and Moon). The expressions for calculation of the Signal-to-Noise Ratio (SNR) at the input of the detector and the compensator are obtained. The detection ch

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Kabakchiev, Hristo, Vera Behar, Ivan Garvanov, Dorina Kabakchieva, Avgust Kabakchiev, and Hermann Rohling. "FSR Systems for Detection of Air Objects Using Cosmic Radio Emissions." Sensors 21, no. 2 (January 11, 2021): 465. http://dx.doi.org/10.3390/s21020465.

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The paper analyses the possibility of Forward Scatter Radar (FSR) systems to detect airplanes using cosmic emission from pulsars and planets (pulsar, Sun, Moon). A suboptimal multichannel algorithm for joint detection and evaluation of the parameters of the forward scattering signal created by an airplane (duration and velocity) is proposed, with preliminary compensation of the powerful direct signal emitted by cosmic sources (pulsar, Sun and Moon). The expressions for calculation of the Signal-to-Noise Ratio (SNR) at the input of the detector and the compensator are obtained. The detection ch

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Rostami, M., and SA Bagherzadeh. "Development and validation of an enhanced semi-empirical method for estimation of aerodynamic characteristics of light, propeller-driven airplanes." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 4 (December 26, 2016): 638–48. http://dx.doi.org/10.1177/0954410016683415.

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This study is intended to introduce an enhanced semi-empirical method for estimation of longitudinal and lateral-directional stability and control derivatives in the preliminary design phase of light airplanes. Specialised for light, single or twin propeller-driven airplanes, available state-of-the-art analytical procedures and design data compendia are combined and modified in a unique compatible method, and automated in NAMAYEH software. In the present study, modified procedures and the software structure are presented. Afterwards, the proposed method is applied to a four-place, low wing, si

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Lin, L., Y. X. Ren, M. Y. Huang, X. D. Zhi, and D. Z. Wang. "Failure Modes of a Reticulated Dome in a Small Airplane Crash." Advances in Civil Engineering 2019 (August 8, 2019): 1–10. http://dx.doi.org/10.1155/2019/5025637.

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Since the 9/11 incident, many engineering research works have been conducted on the impact resistance of large-span space structures. In the present study, a small airplane, Bombardier Challenger 850, was chosen as the test subject. An airplane crash on a single-layered Kiewitt-8 reticulated dome with span 60 m considering roof sheathing effect was simulated using ANSYS/LS-DYNA software. The principles of establishing the numerical model of small airplanes were determined. In addition, the impact styles of small airplane and impact positions on the dome were investigated. The failure modes of

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Lü, Zhi, Zhan Gao, and Yi Lü. "A Flight Simulator that Grouping Aircrafts Simultaneously Take off and Land in Open Grid Computing Environment." Applied Mechanics and Materials 182-183 (June 2012): 1292–97. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.1292.

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The performance of airplane in commercial airline environment is determined by, and therefore an indicator of performance measure of, the thermodynamic properties of airplane. The aim of this study was to establish the use of simulators to determine aircraft accident for a flight of airplanes and evaluate the potential of new airspace structure and airport’s runway. This indicates that there is a possibility of obtaining airplane performance from analysis and verification simulating airplane. As compared with AIRBUS Full Flight Simulator, a multiple aircrafts flight simulator that grouping air

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Du, Cuicui, Deren Kong, and Chundong Xu. "Development of a Fault Detection Instrument for Fiber Bragg Grating Sensing System on Airplane." Micromachines 13, no. 6 (May 31, 2022): 882. http://dx.doi.org/10.3390/mi13060882.

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This study develops a fault detection device for the fiber Bragg grating (FBG) sensing system and a fault detection method to realize the rapid detection of the FBG sensing system on airplanes. According to the distribution of FBG sensors on airplanes, the FBG sensing system is built based on wavelength division multiplexing (WDM) and space division multiplexing (SDM) technologies. Furthermore, the hardware and software of the fault detection device and the relevant FBG demodulator are studied in detail. Additionally, in view of the similar features of the healthy FBG sensor in the same measur

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bin Abu Bakar, Mohd Ridh, Bambang Basuno, and Sulaiman Hasan. "Aerodynamics Analysis on Unsymmetrical Fuselage Models." Applied Mechanics and Materials 315 (April 2013): 273–77. http://dx.doi.org/10.4028/www.scientific.net/amm.315.273.

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The large commercial passengers airplanes are mostly designed to have symmetrical body with respect to the longitudinal axis. However for small passengers airplanes or for the airplane designed as UAV plat form is normally having an unsymmetrical fuselage. The aerodynamics characteristics fuselage may give a strong influence to the overall aerodynamics characteristics of the airplane. The present work investigates the aerodynamics characteristics of the unsymmetrical fuselage with respect to the longitudinal axis. The fuselage assumed to have circular cross section and the coordinate of the fu

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Askue, Vaughan. "Airfoils for airplanes." Air Medical Journal 23, no. 1 (January 2004): 10–11. http://dx.doi.org/10.1016/j.amj.2003.11.001.

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Houchin, Ron. "Painting Paper Airplanes." Appalachian Heritage 46, no. 4 (2018): 109–10. http://dx.doi.org/10.1353/aph.2018.0072.

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Liu, J., J. Zhang, and F. Zhao. "Feature for Distinguishing Propeller-Driven Airplanes from Turbine-Driven Airplanes." IEEE Transactions on Aerospace and Electronic Systems 46, no. 1 (January 2010): 222–29. http://dx.doi.org/10.1109/taes.2010.5417158.

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Zhuravlev, P. V., and V. N. Zhuravlev. "Models of early stages of design of trunk-route passenger airplanes with taking families into account." Civil Aviation High Technologies 25, no. 5 (November 2, 2022): 59–69. http://dx.doi.org/10.26467/2079-0619-2022-25-5-59-69.

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There is a tight connection between the Pre-Design (development of requirements for the designed airplane) and Conceptual Design stages while creating a new aircraft. Taking this connection into account would result in the design of more optimal aircraft that would have the appropriate advantage during operation. Previously when the ability to take such interconnections into the account was lacking the designers were forced to allocate certain reserves in the project based on previous design experience. The advancement of design, modeling and manufacturing methods allowed transitioning from al

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Radmanesh, Hamid, Seyed Saeid Heidari Yazdi, G. B. Gharehpetian, and S. H. Fathi. "Modelling and Simulation of Fuel Cell Dynamics for Electrical Energy Usage of Hercules Airplanes." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/593121.

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Dynamics of proton exchange membrane fuel cells (PEMFC) with hydrogen storage system for generating part of Hercules airplanes electrical energy is presented. Feasibility of using fuel cell (FC) for this airplane is evaluated by means of simulations. Temperature change and dual layer capacity effect are considered in all simulations. Using a three-level 3-phase inverter, FC’s output voltage is connected to the essential bus of the airplane. Moreover, it is possible to connect FC’s output voltage to airplane DC bus alternatively. PID controller is presented to control flow of hydrogen and oxyge

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Lindblom, Gordon P. "MEASUREMENT AND PREDICTION OF DEPOSITIONAL ACCURACY IN DISPERSANT SPRAYING FROM LARGE AIRPLANES." International Oil Spill Conference Proceedings 1987, no. 1 (April 1, 1987): 325–28. http://dx.doi.org/10.7901/2169-3358-1987-1-325.

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ABSTRACT Aerial application of dispersants has progressed to include very large airplanes, such as the Hercules C-130, for which a portable spray unit has been developed. This unit, which can be rapidly placed in the cargo aircraft (without any mechanical alterations) was flight tested with spraying of a dispersant concentrate in 1982. The tests measured actual deposition of chemical under various conditions. The most definitive data were collected using a “deposition track,” positioned on the ground across the flight path of the airplane. The dyed dispersant was recovered from this track and

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Wei, Kaixiang. "Turbofan and turbojet engines: Working process and future development." Theoretical and Natural Science 12, no. 1 (November 17, 2023): 114–19. http://dx.doi.org/10.54254/2753-8818/12/20230447.

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This article is based on the fundamental thermodynamics theory to analyze the difference between the turbojet and turbofan engines. The result of this article is that the turbofan engine is suitable for commercial use since it consumes less fuel and has a higher bypass ratio than the turbojet engine. But low bypass ratio engines can serve the military since they have a smaller volume and higher speed, suitable for air combat. The turbojet engine can travel at a supersonic speed since it has extremely high jet flow from the nozzle and much higher fuel consumption, so it is for military use. Thi

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