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Aeronautical Journal, ISSN 0001-9240, 04/2017, Volume 121, Issue 1238, pp. 433 - 448
Variable tail rotor speed is investigated as a method for reducing tail rotor power, and improving helicopter performance. A helicopter model able to predict... 
Main rotor | Tail rotor | Variable speed | Power | main rotor | variable speed | power | ENGINEERING, AEROSPACE | Flight tests | Torque | Helicopter tail rotors | Flight conditions | Aircraft accidents & safety | Rotors | Rotor speed | Velocity | Yaw | Military helicopters | Weight reduction | Tail rotors | Flow control | Helicopter performance | Thrust
Journal Article
Chinese Journal of Aeronautics, ISSN 1000-9361, 11/2018, Volume 31, Issue 11, pp. 2104 - 2110
Gurney Flaps (GFs) are used for improving the performance of variable speed tail rotors. A validated analytical helicopter model able to predict the main and... 
Tail rotor | Flap height | Tail rotor thrust | High speed flight | Performance | Gurney flap | Variable speed | AERODYNAMIC PERFORMANCE | ENGINEERING, AEROSPACE | FLIGHT | ENHANCEMENT | IMPROVEMENT | BLADE TWIST | HELICOPTER
Journal Article
Journal of Aircraft, ISSN 0021-8669, 11/2018, Volume 55, Issue 6, pp. 2491 - 2509
Journal Article
Aircraft Engineering and Aerospace Technology: An International Journal, ISSN 1748-8842, 03/2016, Volume 88, Issue 2, pp. 215 - 231
Journal Article
Journal of Sound and Vibration, ISSN 0022-460X, 08/2019, Volume 453, pp. 328 - 354
The present work is aimed at illustrating a hybrid analytical/numerical methodology that could be used at the early-design stage to predict the tonal noise of... 
Analytical modeling | Diffraction | Aeroacoustics | Helicopter tail rotor | ACOUSTICS | DESIGN | MECHANICS | REDUCTION | AXIAL-FLOW FANS | ENGINEERING, MECHANICAL | PREDICTION
Journal Article
Key Engineering Materials, ISSN 1013-9826, 09/2018, Volume 778, pp. 28 - 32
Presented results report the findings of a case study carried out to determine the possible factors that lead to the twisting of tail rotor shaft. The... 
Rotor shaft | Mechanical behavior | ANSYS simulation | Strain rate | Military helicopters | Twisting | Tail rotors
Journal Article
Journal of Aircraft, ISSN 0021-8669, 07/2019, Volume 56, Issue 4, pp. 1677 - 1688
This paper presents a numerical study on the rotor noise shielding effects by the helicopter fuselage. The method used to assess acoustic shielding is based on... 
GENERATION | ENGINEERING, AEROSPACE | Error analysis | Wind tunnels | Computational fluid dynamics | Noise | Helicopters | Rotors | Exact solutions | Panel method (fluid dynamics) | Shielding | Forward flight | Military helicopters | Acoustic noise | Airframes | Tail rotors | Multipoles | Fuselages | Wind tunnel models | Transformations | Nonlinear programming | Boundary element method
Journal Article
Journal of Aircraft, ISSN 0021-8669, 03/2018, Volume 55, Issue 2, pp. 805 - 816
In this paper a method for the extraction of main and tail rotor noise from an acoustic pressure time history of a helicopter is described. The method is based... 
ENGINEERING, AEROSPACE | Military helicopters | Flight tests | Wind tunnel testing | Helicopter tail rotors | Broadband | Wind tunnels | Acoustic noise | Noise | Tail rotors | Fourier series
Journal Article
International Journal of Pattern Recognition and Artificial Intelligence, ISSN 0218-0014, 07/2019, Volume 33, Issue 8, p. 1959022
The nonlinear aerodynamics and new kinds of operation associated with helicopter electric tail rotors (ETRs) make accurate speed tracking control under complex... 
Artificial Intelligence | helicopter electrification | active disturbance rejection control (ADRC) | adaptive RBF observer | Electric tail rotor | SYSTEM | DISTURBANCE REJECTION | MOTOR | ACTUATOR | OBSERVER | COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE | Helicopters | Aerodynamics
Journal Article
Journal of Intelligent Material Systems and Structures, ISSN 1045-389X, 10/2014, Volume 25, Issue 15, pp. 1950 - 1958
This article presents an in situ structural health monitoring imaging system for the localization of impacts on a composite complex structure such as a tail... 
Structural health monitoring | morphing | embedded intelligence | active composites | piezoelectric | SYSTEM | WAVE | FIELDS | MATERIALS SCIENCE, MULTIDISCIPLINARY | TIME-REVERSAL | IDENTIFICATION | PROPAGATION | Databases | Filtration | Filtering | Blades | Tail rotors | Inverse | Localization | Position (location)
Journal Article
Journal of Aircraft, ISSN 0021-8669, 03/2014, Volume 51, Issue 2, pp. 464 - 472
A new method of characterizing the external noise radiation of rotorcraft is presented, making use of ground-based acoustic measurements. The method employs... 
DE-DOPPLERIZATION | ENGINEERING, AEROSPACE | Measurement | Aeronautical research | Acoustics research | Acoustic properties | Noise | Rotors | Acoustics | Helicopters | Noise control | Aerospace engineering | Acoustic measurement | Acoustic noise | Tail rotors | Arrays | Microphones
Journal Article
Mechatronics, ISSN 0957-4158, 12/2018, Volume 56, pp. 1 - 15
Tail-sitter vertical take-off and landing (VTOL) vehicle is a promising airframe among all the unmanned aerial vehicles (UAV), although challenges regarding... 
Tail-sitter | Unmanned aerial vehicle | Hardware-in-the-loop | Vertical take-off and land | AUTOMATION & CONTROL SYSTEMS | COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE | ENGINEERING, MECHANICAL | ENGINEERING, ELECTRICAL & ELECTRONIC | Drone aircraft | Computer programming | Control systems | Remote control
Journal Article
Journal of the American Helicopter Society, ISSN 0002-8711, 10/2013, Volume 58, Issue 4, pp. 042005 - 1-042005-10
This paper describes the systematic design and development of a hover-capable cyclocopter/cyclogyro, which is a 100-year-old vertical takeoff and landing... 
HOVER PERFORMANCE | SCALE CYCLOIDAL ROTOR | ENGINEERING, AEROSPACE | Design engineering | Attitude control | Horizontal | Helicopters | Rotors | Tail rotors | Aircraft | Thrust
Journal Article
Chinese Journal of Aeronautics, ISSN 1000-9361, 09/2018, Volume 31, Issue 9, pp. 1894 - 1901
With the development of electric helicopters’ motor technology and the widespread use of electric drive rotors, more aircraft use electric rotors to provide... 
Helicopter | More Electric Aircraft (MEA) | Tail rotor | Propulsion optimization | Electric tail rotor | ENGINEERING, AEROSPACE
Journal Article
Journal of Aerospace Engineering, ISSN 0893-1321, 09/2017, Volume 30, Issue 5, p. 4017032
Journal Article
Mathematical Problems in Engineering, ISSN 1024-123X, 01/2017, Volume 2017, pp. 1 - 13
Journal Article
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