Results 41 to 50 of about 15,230 (231)

Helicopter low-speed yaw control [PDF]

, 1993
A system for improving yaw control at low speeds consists of one strake placed on the upper portion of the fuselage facing the retreating rotor blade and another strake placed on the lower portion of the fuselage facing the advancing rotor blade.
Crowell, Cynthia A., Kelley, Henry L., Wilson, John C.   +2 more
core   +1 more source

Mental Workload Measurement in Helicopter Maintenance: Comparing Virtual Reality Simulation and Real‐World Conditions

Human Factors and Ergonomics in Manufacturing &Service Industries, Volume 36, Issue 2, March 2026.
ABSTRACT Designing tomorrow's maintenance systems with a human‐centered approach is crucial to ensure optimal safety and performance. A key prerequisite for achieving this goal is to anticipate operators' cognitive behavior early in the design cycle. This study aims to determine whether the combination of mental workload measurement tools, including ...
Lorrys Berthon, Fabien Bernard, Sylvain Fleury, Raphaël Paquin, Simon Richir   +4 more
wiley   +1 more source

Development of an aeroelastic stability boundary for a rotor in autorotation [PDF]

, 2008
<p>For the present study, a mathematical model AMRA was created to simulate the aeroelastic behaviour of a rotor during autorotation. Our model: Aeroelastic Model of a Rotor in Autorotation (AMRA) captures transverse bending and teeter ...
Gillies, E.A., Thomson, D.G., Trchalík, J.   +2 more
core  

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

Advanced Materials Technologies, Volume 11, Issue 3, 5 February 2026.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk, Senentxu Lanceros‐Mendez, Abílio Pereira Silva   +2 more
wiley   +1 more source

Design and Aerodynamic Authority Analysis of ContinuousTrailing-edge Flap for Helicopter Blade

Hangkong gongcheng jinzhan, 2018
Continuous trailing-edge flap has many advantages over conventional discrete flap in helicopter rotor vibration reduction applications, such as light weight, compact structure and stable airflow. Macro fiber composite is chosen as the actuating material.
Li Yun, Dong Linghua, Zhou Jinlong, Yang Weidong   +3 more
doaj   +1 more source

A Review on Vibration Analysis of Helicopter Rotor Blade

International Journal for Research in Applied Science and Engineering Technology, 2022
Abstract: Vibration has always been a major disturbance for helicopter. Vibrations, thus, a threat to components of helicopter. The vibration created by a helicopter draws a great contribution to the reduction in life of the components. Reducing the vibration that creates from helicopter rotor blades, tail rotors is a one step closer to this crisis ...
Bilji C Mathew, Prasun Banerjee, Muhammad Fawaz, Samprit Roy, Aritra Laha, Manasa Bhatt   +5 more
openaire   +1 more source

Advances in Delamination Analysis and Damage Prediction: A Comprehensive Review on Polymer Composite Materials

Engineering Reports, Volume 8, Issue 2, February 2026.
This comprehensive study advances delamination analysis in composites through innovative computational methods, experimental validation techniques, and predictive algorithms, collectively enhancing damage progression prediction and structural health monitoring for improved integrity in high‐performance applications.
Dhivya Elumalai, Ananda Babu Arumugam, Yitbarek Gashaw Tadesse, Mesfin Kebede Kassa, Mohit Gupta   +4 more
wiley   +1 more source

Investigating the Level of Fidelity of an Actuator Line Model in Predicting Loads and Deflections of Rotating Blades under Uniform Free-Stream Flow

Applied Sciences, 2021
In this paper, the accuracy of an in-house Actuator Line (AL) model is tested on aeroelastic simulations of a Wind Turbine (WT) rotor and a helicopter Main Rotor (MR) under uniform free-stream flow.
Nikos Spyropoulos, George Papadakis, John M. Prospathopoulos, Vasilis A. Riziotis   +3 more
doaj   +1 more source

Hingeless helicopter rotor with improved stability [PDF]

, 1976
Improved stability was provided in a hingeless helicopter rotor by inclining the principal elastic flexural axes and coupling pitching of the rotor blade with the lead-lag bending of the blade.
Bousman, W. G., Hodges, D. H., Ormiston, R. A., Peters, D. A.   +3 more
core   +1 more source

Influence of blade aerodynamic model on prediction of helicopter rotor aeroacoustic signatures [PDF]

, 2011
Brown’s vorticity transport model has been used to investigate how the local blade aerodynamic model influences the quality of the prediction of the high-frequency airloads associated with blade–vortex interactions, and thus the accuracy with which the ...
Boyd D. D., Farassat F., Kelly M. E., Kelly M. E., Kelly M. E., Lim J. W., Lim J. W., Mary E. Kelly, Pengel K., Richard E. Brown, Schneider O., Toro E. F., van der Wall B. G., Whitehouse G., Yu Y. H.   +14 more
core   +1 more source