Results 121 to 130 of about 891,158 (301)

CIVIL ACADEMIC EDUCATION OF HELICOPTER ENGINEERING IN POLAND

open access: yesAviation, 2004
Requirements of industry, research centres, and users necessitate the teaching of helicopter engineering at various levels and specialities, both in the civil and military sectors in Poland. Civil academic education of helicopter engineering has been offered for many years at the Faculty of Power and Aeronautical Engineering (FPAE) of Warsaw University
openaire   +4 more sources

An exploratory investigation of the flight dynamics effects of rotor rpm variations and rotor state feedback in hover [PDF]

open access: yes
This paper presents the results of an analytical study conducted to investigate airframe/engine interface dynamics, and the influence of rotor speed variations on the flight dynamics of the helicopter in hover, and to explore the potential benefits of ...
Chen, Robert T. N.
core   +1 more source

Crater Observing Bioinspired Rolling Articulator (COBRA)

open access: yesAdvanced Intelligent Systems, Volume 8, Issue 3, March 2026.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame   +4 more
wiley   +1 more source

Comparative Neuromechanical Wing‐Actuation Architectures of Flapping Flight in Insects, Hummingbirds, and Robots

open access: yesAdvanced Intelligent Systems, Volume 8, Issue 3, March 2026.
Natural fliers achieve remarkable aerial performance through diverse wing neuromechanical systems integrating actuation, sensing, and control. This study synthesizes neuromechanical architectures in insects and hummingbirds, identifying two key functional types‐Dual Neural‐Mechanical Oscillator and Neurally‐modulated Mechanical Oscillator‐ and ...
Suyash Agrawal   +4 more
wiley   +1 more source

The market and the future of gas turbine engines for super heavy transport helicopters

open access: yesАвіаційно-космічна техніка та технологія
The introductory part of the article provides brief information about the main activity of Element JSC – the development and production of electronic control systems for aircraft engines, in particular, the RDC-450M ECU family for turboshaft gas turbine ...
Vadym Nerubaskyi
doaj   +1 more source

A practical approach to helicopter internal noise prediction [PDF]

open access: yes
A practical and well correlated procedure for predicting helicopter internal noise is presented. It accounts for the propagation of noise along multiple paths on an octave by octave basis.
Defelice, J. J., Levine, L. S.
core   +1 more source

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

open access: yesAdvanced Intelligent Systems, Volume 8, Issue 3, March 2026.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee   +9 more
wiley   +1 more source

Physical Characteristics of Fast Roping in British Elite Law Enforcement Officers

open access: yesEuropean Journal of Sport Science, Volume 26, Issue 3, March 2026.
ABSTRACT Elite law enforcement and special forces operators around the world have a unique skill set, including some risky methods of entry into a scene of operation. With fast roping being actively utilized by this population, it is important to gain an understanding of the physical demands of the task.
Joseph Warwick   +4 more
wiley   +1 more source

Calculation Method of Transmission System Time Between Overhaul with Considering Running Time

open access: yesJixie chuandong, 2019
By establishing the mathematical model of helicopter transmission system running time and flight time, engine working time, the time ratio relation between running time and flight time is deduced, that is, conversion coefficient.
Wenbin Pan, Weizhen Liu, Huaipeng Li
doaj  

Helicopter anti-torque system using fuselage strakes [PDF]

open access: yes, 1987
The improvement of the helicopter torque control system is discussed. At low to medium forward speeds helicopter performance is limited by the effectiveness of the means for counteracting main rotor torque and controlling sideslip airloads.
Kelley, Henry L., Wilson, John C.
core   +1 more source

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