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Relevant bibliographies by topics / Coaxial reducer

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Academic literature on the topic 'Coaxial reducer'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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Journal articles on the topic "Coaxial reducer"

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Vintilă, Daniela, Laura Diana Grigorie, and Alina Elena Romanescu. "Dynamic Analysis of Planetary Gear Reducer." Applied Mechanics and Materials 880 (March 2018): 87–92. http://dx.doi.org/10.4028/www.scientific.net/amm.880.87.

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This paper presents dynamic analysis of a three stage planetary gear reducer for operate a tower crane. Ordinary and planetary gears have been designed respecting the coaxial, neighboring and mounting conditions. Harmonic analysis has been processed to identify frequency response for displacements, strains and deformations. The aim of the study was to determine critical frequencies to avoid mechanical resonance phenomenon. The obtained results are based on the superposition method for solving the systems of differential equations resulting from the analysis with finite elements.

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Buiga, Ovidiu, and Lucian Tudose. "Optimal mass minimization design of a two-stage coaxial helical speed reducer with Genetic Algorithms." Advances in Engineering Software 68 (February 2014): 25–32. http://dx.doi.org/10.1016/j.advengsoft.2013.11.002.

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Taricyn, Danil, Danil Orlov, and Aleksandr Petuhov. "Test results of a prototype transmission with non-contact gearing based on permanent magnets." Proceedings of Petersburg Transport University 21, no. 3 (2024): 706–17. http://dx.doi.org/10.20295/1815-588x-2024-03-706-717.

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Purpose: the paper studies the properties of a coaxial magnetic transmission with permanent magnets and magnetizing windings. The dependences of the efficiency on the rotation frequency and load power are revealed, as well as the dependence of the maximum torque preceding the engagement failure on the magnetizing current and the rotation frequency. Methods: experimental study on a stand by loading the drive motor through the test transmission on a generator loading on a resistor. The process of studying the stand is also described, including determining the losses in test electric machines by

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TERADA, Hidetsugu, Tomoaki FUKASAWA, and Rinzoh IRIE. "Fundamental Analysis of a Precession Motion Ball Reducer (1st Report)-Motion Principle of a Coaxial Output Type-." Journal of the Japan Society for Precision Engineering 69, no. 5 (2003): 688–92. http://dx.doi.org/10.2493/jjspe.69.688.

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Усік, В. В., та О. В. Косенко. "ДОСЛІДЖЕННЯ ПЕРЕДАТНИХ ВІДНОШЕНЬ ПЛАНЕТАРНИХ ПЕРЕДАЧ ПІДЙОМНО-ТРАНСПОРТНИХ МАШИН". Open Information and Computer Integrated Technologies, № 97 (8 грудня 2023): 158–63. http://dx.doi.org/10.32620/oikit.2023.97.10.

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Lifting and transporting machines (PTM) are one of the important equipment for the mechanization of work in various spheres of the national economy. In addition to the multi-rescue system, the cargo lifting mechanism also includes a winch. Winches with one drum, which have standard parameters - traction force from 3.2 to 125 KN at rope speed from 0.5 to 0.1 m/s, are most often used in PTM. Such winches include a two-stage gear reducer that connects the electric motor with the drum. Such a winch drive scheme is quite large and has considerable weight. One of the areas that will help reduce thes

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Gonza´lez-Palacios, M. A., and J. Angeles. "The Design of a Novel Mechanical Transmission for Speed Reduction." Journal of Mechanical Design 121, no. 4 (1999): 538–43. http://dx.doi.org/10.1115/1.2829495.

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The design of a novel transmission for speed reduction is reported in this paper. The transmission is based on the layout of pure-rolling indexing cam mechanisms, for it is intended to eliminate backlash and friction, which are the main drawbacks of gear transmissions. The design relies on a unified methodology for indexing cam mechanisms, whereby the same procedure is used to design planar, spherical, and spatial mechanisms. Two versions of the speed reducer, that we term Speed-o-Cam, are described here, namely, planar, to couple shafts of parallel axes, and spherical, to couple shafts of int

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Dansran, Bayarsaikhan, Songyuan Xu, Jiwon Heo, Chan-Soo Lee, and Bierng-Chearl Ahn. "Design of a Broadband Transition from a Coaxial Cable to a Reduced-Height Rectangular Waveguide." Applied Sciences 13, no. 20 (2023): 11265. http://dx.doi.org/10.3390/app132011265.

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For miniaturization, rectangular waveguides with a reduced height are often required, along with a coaxial transition for signal launching. We present a simulation-based design of a broadband transition from a coaxial cable to a rectangular waveguide with the height(b)-to-width(a) ratio b/a ranging from 0.125 to 0.375. The proposed transition consists of a coaxial probe with a cylindrical head or a disk and two symmetrically placed tuning posts. To extend the operating frequency range, three sections of the rectangular waveguide are employed with properly chosen dimensions. Design examples are

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Novikova, Galina V., Alexander A. Tikhonov, Mariana V. Prosviryakova, Vladimir F. Storchevoy, Olga V. Mikhaylova, and Alexander V. Storchevoy. "Justification of the Microwave Unit Parameters for Removing Fat from the Bones." Engineering Technologies and Systems 34, no. 2 (2024): 318–35. http://dx.doi.org/10.15507/2658-4123.034.202402.318-335.

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Introduction. The existing methods of removing fat from the bones of meat-producing animals are low-efficient and require high operating costs. To solve this problem, a unit with an ultra-high-frequency energy supply to the resonator is proposed. In this unit the crushed raw materials are subjected to thermomechanical action. Aim of the Study. The aim of the study is to increase the efficiency of removing fat from the bones of meat-producing animals while preserving the product feed value in a continuousflow process microwave unit with a coaxial resonator without a shielding housing by providi

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Usenko, Vjacheslav, Kateryna Balalaieva та Mykhailo Mitrakhovych. "Оцінка тяги закапотованого співвісного гвинтовентилятора". Aerospace technic and technology, № 4 (11 серпня 2022): 52–56. http://dx.doi.org/10.32620/aktt.2022.4.06.

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One of the basic requirements for existing and future aircraft engines is high specific power, low specific fuel consumption, and low noise level. The current work evaluates the thrust of a ducted coaxial propfan. A coaxial propfan was chosen as the object under study. The peripheral diameter of the first and second rows of the propfan reaches 4.5 m. The number of blades of the first row of the propfan is 8, the second – 6. The duct had a length of 3.214 m and a maximum profile thickness of 0.23 m. For this study, a model of a coaxial propeller fan was made for a numerical experiment. The mode

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Mya, Yin Yin. "Improvement of Pulse Shape by Reducing Ripple Using Coaxial Cable." Journal of Engineering Technology and Applied Physics 5, no. 2 (2023): 45–51. http://dx.doi.org/10.33093/jetap.2023.5.2.4.

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Even though pulse shape in rectangular form is desirable for most applications, pulse generated from coaxial cable has ripple and is not in desired rectangular shape. This study is to improve the pulse shape generated from coaxial cable to be rectangular shape. Coaxial cables with difference dielectric materials are studied for generation 100 ns pulse. The study has been carried out by state space representation method and MATLAB simulation for pulse forming network of Type-B which has same characteristics of coaxial cable. Ripple can be reduced to 2% to 3% increasing the inductance values nex

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Dissertations / Theses on the topic "Coaxial reducer"

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Курочкін, Валерій Борисович, Валерий Борисович Курочкин, Valerii Borysovych Kurochkin, О. А. Барыкин та В. К. Сидоренко. "Уменьшение недогруженности первой ступени цилиндрических двухступенчатых соосных редукторов". Thesis, Издательство СумГУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/8374.

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Books on the topic "Coaxial reducer"

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Nikjooy, Mohammad. K-epsilon turbulence model assessment with reduced numerical diffusion for coaxial jets. AIAA, 1988.

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Book chapters on the topic "Coaxial reducer"

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Armbruster, Wolfgang, Justin S. Hardi, and Michael Oschwald. "Experimental Investigation of Injection-Coupled High-Frequency Combustion Instabilities." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_16.

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Abstract Self-excited high-frequency combustion instabilities were investigated in a 42-injector cryogenic rocket combustor under representative conditions. In previous research it was found that the instabilities are connected to acoustic resonance of the shear-coaxial injectors. In order to gain a better understanding of the flame dynamics during instabilities, an optical access window was realised in the research combustor. This allowed 2D visualisation of supercritical flame response to acoustics under conditions similar to those found in European launcher engines. Through the window, high

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Bogdanov, Faik, Irina Chochia, Lily Svanidze, and Roman Jobava. "Waveguide Port Approach in EM Simulation of Microwave Antennas." In Microwave Technologies [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102996.

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This chapter generalizes a recently proposed MoM-based approach to waveguide port excitation (WPE) problems on arbitrary conducting and composite geometries. This approach combines the canonical aperture coupling approach with the EFIE-PMCHWT formulation for composite structures. Each WPE problem in this approach is divided into equivalent sub-problems for internal and external regions, which are solved using the MoM. Internal WPE problems are solved using waveguide modal expansion in the port plane, while external problems are solved using the equivalence principle to reduce these problems to

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Yeola (Pate), Meenakshi, and Sushanth R. Nayak. "Ergonomics in Laparoscopy." In Handbook of Laparoscopy Instruments. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815179903123010004.

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Ergonomics studies aptly fitting a worker to his job or how the environment is more conducive to a laparoscopic surgeon. In 1949, the phrase was fully defined and benefited and protected many aspects of human activity [1]. In the context of laparoscopy, the importance of ergonomics cannot be overstated. Suturing time can be reduced by using proper ergonomics, according to studies [2]. Ergonomically designed items have been found to alleviate pressure-related chronic discomfort in surgeons [3]. This article discusses fundamental principles and procedures such as triangulation, ideal coaxial ali

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Zhang, Qing, Jianhui Jin, Shipin Yang, and Lijuan Li. "An Analytical-Based Optimization Method for Lift-off Effects in Transmitter-Receiver Eddy Current Probes." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2025. https://doi.org/10.3233/saem250004.

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The lift-off effect is a main challenge for the eddy current testing (ECT)-based rail detections. The non-coaxial transmitter-receiver (TR) probes are considered as promising structures, however, the research focused on the transmitter-receiver coil distance optimization is limited. In this study, this coil distance is optimized for the Tx-Rx probe with varying lift-offs in rail inspections. Firstly, the solution for the analytical model of the Tx-Rx probe is given. Based on the model, lo–D integration is introduced, and an optimization method is given. Analytical simulations under different c

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Annas, George J. "She’s Going to Die: The Tragedy of Angela Carder." In Standard Of Care. Oxford University PressNew York, NY, 1993. http://dx.doi.org/10.1093/oso/9780195072471.003.0004.

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Abstract In his short story, “The Use of Force,” William Carlos Williams relates how a doctor (probably Williams himself) used extreme physical force to pry open the mouth of a recalcitrant child who, he suspected, had diphtheria that could only be diagnosed by viewing her throat. The little girl resists his coaxing, and when, with her fathers help, the doctor finally manages to jam the wooden tongue depressor between her teeth, the child opens her mouth just enough to crunch down on the blade to “reduce it to splinters.” The doctor becomes furious with the child, whose mouth is now bleeding a

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Lakkis, Jonathan, and Cees Bil. "Conceptual Design Study of a High-Altitude Mountain Rescue Rotorcraft." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210129.

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While there is a market for trekkers venturing into isolated environments, there will also be a market for specialized vehicles to rescue trekkers waylaid by unfortunate circumstance. This paper presents a conceptual design study of a helicopter specifically for rescue operations in extremely high altitude and mountainous terrain. Mt. Everest suffers from overcrowding and a high fluctuation of inexperienced climbers who pose a risk to themselves and other climbers around them. Rescue by fellow climbers when incapacitated is risky and difficult. There is a need for a rescue helicopter capable o

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Han, Chang Dae. "Wire-Coating Extrusion." In Rheology and Processing of Polymeric Materials: Volume 2: Polymer Processing. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195187830.003.0010.

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The process of coating a wire with a polymeric material is basically an extrusion operation in which either the molten polymer is extruded continuously over an axially moving wire or the wire is pulled through the extruded molten polymer. As schematically shown in Figure 5.1, the typical wire-coating unit consists of a pay-off device, a wire preheater, an extruder equipped with a cross-head die, a cooling trough, and a take-off device. Various control and measuring instruments are utilized in the commercial line (Griff 1962). The two basic wire-coating dies are pressure-type dies and tubing-ty

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Conference papers on the topic "Coaxial reducer"

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Huong, Tran Thi Thu, An Tri Bao, Trong-Hieu Le, and Vu Van Yem. "Novel Size-Reduced Coaxial Cavity Filters For 5G Networks." In 2024 IEEE 12th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2024. https://doi.org/10.1109/apcap62011.2024.10881500.

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Aggarwal, Diksha, Rahul Ramanujam, Abhishek A., and Debopam Das. "Performance Measurement of a Novel Dissimilar Coaxial Rotor System." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0074-2018-12715.

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This paper presents the preliminary results from the experimental study of the aerodynamic characterization of a novel dissimilar coaxial rotor concept with reduced rotor-rotor interaction. The performance of dissimilar coaxial rotor concept is compared with existing rotor configurations such as conventional single main-rotor tail-rotor and regular coaxial rotor. The performance measurement is carried out using a small scale coaxial hover test stand facility setup for this purpose. The hover performance of different rotor concepts namely conventional, regular coaxial and dissimilar coaxial rot

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Hong, Seong, Do-Hyung Kim, Dong Kim, and Sung Jung. "Multicyclic Control for Vibration Reduction of Lift-Offset Coaxial Rotorcraft." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1284.

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This study explores the best vibration reduction using a multicyclic controller through an individual blade control (IBC) actuation scheme for a lift-offset coaxial helicopter in high-speed flight. The rotorcraft dynamics model consists of coaxial, three-bladed counter-rotating rotors and a finite element fuselage stick model constructed based on the measured data of the XH-59A helicopter. The two-way coupled rotor-body vibration analysis results exhibit excellent correlations with the test data for rotor hub loads and airframe vibrations. The best actuation scenarios are sought for the minimu

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Singh, Puneet, and Peretz Friedmann. "A Computational Fluid Dynamics Based Viscous Vortex Particle Method for Coaxial Rotor Interaction Calculations." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12002.

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The coaxial rotor in hover and forward flight experiences complex unsteady aerodynamic interaction effects. Standard methods used for isolated rotor analysis are not adequate for obtaining the unsteady loads and wake. More accurate and computationally efficient approaches are required. The viscous vortex particle approach based on the Lagrangian formulation of the incompressible Navier-Stokes equations is a grid free method suitable for capturing the vortex wake interaction over long distances. The rational function approximation of unsteady airfoil loads from a CFD database is used to reduce

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Yao, Yuan, and Daniel Schrage. "Design and Prototyping of a New Coaxial VTOL UAV Concept." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12194.

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This paper introduces a new VTOL small UAV concept. This concept features a coaxial rotor design with novel control mechanism. A prototype is constructed to demonstrate the viability and operational principle of the control mechanism. An optimization is conducted on the baseline to reduce hover power and then compared to two existing quadrotors.

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Liu, Yuhui, Lanqing Yang, Qiang-Ming Cai, et al. "Using Coaxial Ground Full-touch Structure to Reduce Far-end Crosstalk in PCIe5 High-speed Connectors." In 2024 Photonics & Electromagnetics Research Symposium (PIERS). IEEE, 2024. http://dx.doi.org/10.1109/piers62282.2024.10618027.

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Moore, Zachary, Lokesh Silwal, Aditya Vijayaraj, and Vrishank Raghav. "Quantification of the Aerodynamic Interference for Counter-Rotating Coaxial Rotors In-Ground Effect." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-0004.

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The performance of a coaxial rotor hovering in-ground effect (IGE) is compared against the out-of-ground effect (OGE) condition to quantify the rotor-ground interaction and against an isolated rotor IGE at equivalent blade loading to quantify the rotor-rotor interaction. It is observed that the performance of the coaxial rotor improves when it hovers IGE. However, the rotor-rotor and rotor-ground interactions compete, which affects the performance of the coaxial rotor. This paper aims to quantitatively measure the aerodynamic interactions of the CCR in IGE by developing a theoretical framework

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Folkers, Joie L. "Dual Wall Piping System for Containment and Superior Impact Resistance." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98448.

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Abstract A novel means of producing secondarily contained fiberglass reinforced plastic (FRP) piping has emerged which will greatly improve the performance and installation characteristics of the product. This method of manufacture and the product, called coaxial piping, will be reviewed and explained. The enhanced features and benefits will be discussed, including simplified installation and reduced cost. A fundamental improvement in the impact resistance of the product has occurred due to the nature of the construction of the product, which will also be presented.

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Hong, Seong Hyun, Young Kim, Min Cho, and Sung Jung. "Active Vibration Reduction of Coaxial Rotor System using Multicyclic Controller with Fluid-Structure Coupling Approach." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-222.

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This study investigates the active vibration reduction of a coaxial rotor system in high-speed forward flight using an individual blade control (IBC) scheme with multicyclic control strategy. A high-fidelity simulation framework is developed based on a loosely coupled analysis between a compressible three-dimensional computational fluid dynamics (CFD) solver and a comprehensive aeromechanics (CA) analysis program. The rotorcraft analysis model adopts an isolated rotor model and is validated against flight test data, resulting in reasonable agreements in predicting the rotor hub vibratory loads

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Giovanetti, Eli, and Kenneth Hall. "Optimal Design of Compound Helicopters Using Higher Harmonic Control." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9553.

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We investigate the optimal design of a compound helicopter comprised of counter-rotating coaxial rotors, a propeller, and optionally a fixed wing. We determine the blade geometry, azimuthal blade pitch inputs, optimal shaft angle (rotor angle of attack), and division of propulsive and lifting forces among the components that minimize the total power for a given flight condition. The optimal design problem is cast as a variational statement that minimizes the sum of induced and viscous power losses for a prescribed lift, propulsive force, and vehicle trim condition. The rotor, propeller, and wi

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