Results 31 to 40 of about 92,623 (181)
A rational approach to comparing the performance of coaxial and conventional rotors [PDF]
, 2009 The merit, in terms of its efficiency and performance, of the twin, contrarotating coaxial rotor configuration over the more conventional single rotor system has long been a point of contention.
Brown, R.E., Kim, Hyo Wan
core +4 more sources
Сельскохозяйственные машины и технологии, 2021 It was noted that when forming the configurations of an unmanned aerial system for pesticide and fertilizer application, it is necessary to take into account the interdependence of unmanned and ground-based aerial systems.
L. A. Marchenko +3 more
doaj +1 more source
Advanced 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
Geometric Sensitivity and Performance–Flow Field Coupling in Coaxial and Staggered Rotor Systems
International Journal of Aerospace Engineering, Volume 2026, Issue 1, 2026.Multirotor aerodynamic interference exerts a remarkable influence on the aerodynamic characteristics of distributed rotorcraft. It triggers complex flow structures and performance changes, whereas the inherent relationship between flow field characteristics and performance evolution has not yet been clarified.
He Zhu +6 more
wiley +1 more source
Near Surface Geophysics, Volume 23, Issue 4, Page 310-323, August 2025.Abstract Extensive pumping, storm floods or sea‐level rise can lead to regional and local‐scale processes of saltwater intrusion into coastal aquifers. Particularly when exacerbated by the impacts of climate change, these processes can threaten freshwater resources and thus drinking water supplies and need to be prevented by investigation and ...
Mathias Ronczka +5 more
wiley +1 more source
Determination of loads in the ultralight helicopter blades
Aviation, 2023 The article describes research that was carried out on coaxial a single-seat ultralight helicopter Rotorschmiede VA-115 which is manufactured by German firm RS Helikopter GmbH.
Vitaly Dudnik
doaj +1 more source
Multimodal Locomotion: Next Generation Aerial–Terrestrial Mobile Robotics
Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.Aerial–terrestrial robots can achieve efficient energy consumption and robust environmental interaction by adding morphological features, adapting forms for locomotion transitions, and integrating multiple platforms. This next generation of mobile robots advances real‐world robotic deployment for operations with complex tasks and tackle environments ...
Jane Pauline Ramirez, Salua Hamaza
wiley +1 more source
Spring and Power in Hovering Ornithopters
Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau +4 more
wiley +1 more source
Performance and Vibration Analyses of Lift-Offset Helicopters
International Journal of Aerospace Engineering, 2017 A validation study on the performance and vibration analyses of the XH-59A compound helicopter is conducted to establish techniques for the comprehensive analysis of lift-offset compound helicopters.
Jeong-In Go, Do-Hyung Kim, Jae-Sang Park
doaj +1 more source
Научный вестник МГТУ ГА, 2018 The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin +2 more
doaj +1 more source