Results 21 to 30 of about 827,445 (334)

Coupled flight dynamics and CFD - demonstration for helicopters in shipborne environment [PDF]

, 2017
The development of high-performance computing and computational fluid dynamics methods have evolved to the point where it is possible to simulate complete helicopter configurations with good accuracy.
Barakos, G.N., Crozon, C., Steijl, R.
core   +1 more source

Sex- and size-dependent variation in wing morphology of the cuckoo wasp Trichrysis cyanea (Hymenoptera: Chrysididae)

European Journal of Entomology, 2022
Intraspecific variation and sexual dimorphism in wing shape and size is common in winged insects. The exact patterns, however, differ among taxa and are related to the selection pressure acting on specific traits.
David FRÖHLICH, Lukas ZANGL, Günther RASPOTNIG, Stephan KOBLMÜLLER   +3 more
doaj   +1 more source

Sexual differences in the morphology and movement of a butterfly: Good shape does not make good dispersers

European Journal of Entomology, 2019
Movements are involved in several routine processes and may scale up to important ecological processes such as dispersal. However, movement is affected by a wealth of factors including flight capacity and behavioural traits. Both frequently differ in the
Elisabeth REIM, Fee WIDDERICH, Klaus FISCHER   +2 more
doaj   +1 more source

Studies on the Relationship between Occupational Stress and Mental Health, Performance, and Job Satisfaction of Chinese Civil Aviation Pilots

Aerospace, 2023
This research work delves into the potential impact of occupational stress on the mental health, performance, and job satisfaction of civil aviation pilots.
Yanzeng Zhao, Yanlong Wang, Wei Guo, Lin Cheng, Jialu Tong, Ruipeng Ji, Yizhi Zhou, Ziyu Liu, Lijing Wang   +8 more
doaj   +1 more source

Thermal and Oxygen Flight Sensitivity in Ageing Drosophila melanogaster Flies: Links to Rapamycin-Induced Cell Size Changes

Biology, 2021
Ectotherms can become physiologically challenged when performing oxygen-demanding activities (e.g., flight) across differing environmental conditions, specifically temperature and oxygen levels.
Ewa Szlachcic, Marcin Czarnoleski
doaj   +1 more source

A Wind Tunnel Experimental Study on the Flexible Flapping Wing With an Attached Airfoil to the Root

IEEE Access, 2019
With the purpose to improve the performance of the flexible membrane flapping wing, a kind of flapping wing with an attached airfoil to the root is designed and tested in a wind tunnel.
Peng Nian, Bifeng Song, Jianlin Xuan, Wenqing Yang, Yuanbo Dong   +4 more
doaj   +1 more source

Long Range Air Traffic Flow Management with Flight-Specific Flight Performance

Future Transportation, 2022
The increasing need for dynamic in-flight adjustments of a trajectory allows the airport, air traffic control and the airline a high degree of flexibility in terms of in-flight execution. This concept enables numerous optimisation options to jointly meet
Judith Rosenow, Ehsan Asadi, Daniel Lubig, Michael Schultz, Hartmut Fricke   +4 more
doaj   +1 more source

Take-off mechanics in hummingbirds (Trochilidae) [PDF]

, 2004
Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L., Powers, Donald R., Tobalske, Bret W.   +2 more
core   +2 more sources

Tri-Copter UAV With Individually Tilted Main Wings for Flight Maneuvers

IEEE Access, 2020
A tri-copter unmanned aerial vehicle (UAV) with individually tilted main wings for various flight maneuvers is presented. In contrast to conventional tilt wing UAVs, thrust vectoring and control of the directions of main wing surfaces are attained by ...
Kyung-Jae Nam, Joosang Joung, Dongsoo Har   +2 more
doaj   +1 more source

Process Development for Integrated and Distributed Rotorcraft Design

Aerospace, 2019
The German Aerospace Center is currently developing a new design environment for rotorcraft, which combines sizing, simulation and evaluation tasks into one toolbox.
Peter Weiand, Michel Buchwald, Dominik Schwinn   +2 more
doaj   +1 more source