Results 71 to 80 of about 7,860,213 (302)

Experimental Investigations on the Possibility to Apply the Corrugated Sheet Metal Used in the Past with Junkers Aircraft to Reduce Noise for Future European Aircraft. Other Noise Reduction Experiments for Future European Aircraft [PDF]

INCAS Bulletin, 2018
This paper shows that corrugated skin used in the past with Junkers aircraft to increase the fuselage and wing rigidity can lead to noise reduction for future European aircraft. If the pressure side of wing which is placed above the engine is corrugated,
Constantin SANDU, Marius DEACONU, Valentin SILIVESTRU, Cristian-Teodor OLARIU, Constantin-Radu SANDU   +4 more
doaj   +1 more source

Acoustic Measurements of a Large Civil Transport Main Landing Gear Model [PDF]

22nd AIAA/CEAS Aeroacoustics Conference, 2016
Microphone phased array acoustic measurements of a 26 percent-scale, Boeing 777-200 main landing gear model with and without noise reduction fairings installed were obtained in the anechoic configuration of the Virginia Tech Stability Tunnel. Data were acquired at Mach numbers of 0.12, 0.15, and 0.17 with the latter speed used as the nominal test ...
Patricio A. Ravetta, Mehdi R. Khorrami, Ricardo Burdisso   +2 more
openaire   +1 more source

Perceptions of Governance (Il)Legitimacy Mediate Climate Change Adaptation in the Lake Victoria Basin, Uganda

Environmental Policy and Governance, EarlyView.
ABSTRACT Governance is a well‐known dimension of adaptive capacity across various frameworks, however specific links between perceptions of governance (il)legitimacy and adaptive capacity remain relatively unexplored. In this study, we investigate connections between climate change adaptation and perceptions of governance (il)legitimacy using focus ...
Emma D. Rice, Jonathan G. Low, Molly Atkins, Bwambale Mbilingi, Veronica Mpomwenda, Laban Musinguzi, Vianny Natugonza, Fiona Nunan, Elizabeth A. Nyboer   +8 more
wiley   +1 more source

Dynamics of Oleo-Pneumatic Landing Gear Systems for Carrier-Based Unmanned Aerial Vehicles

Aerospace
This paper presents a comprehensive analysis of the dynamics and design of oleo-pneumatic shock absorbers for the landing gear of carrier-based Unmanned Aerial Vehicles (UAVs). Carrier-based operations impose unique challenges due to high-impact landings,
Ali Dinc, Faruk Yildiz, Junkun Ma, Reg Pecen, Suleiman Obeidat, Ali Mamedov, Murat Otkur   +6 more
doaj   +1 more source

The Feasibility Test of Electric Propulsion Systems: Case Study for a Light and Fixed‐Wing Aircraft

Energy Science &Engineering, EarlyView.
ABSTRACT This study investigates the feasibility and performance of a fully electric propulsion system (EPS) integrated into a light fixed‐wing aircraft. The system consists of a 65 kW‐class electric motor, a high‐efficiency inverter, and dual lithium‐ion battery packs with a total capacity of 27 kWh—collectively engineered to fulfill both power ...
Byeong Gyu Gang
wiley   +1 more source

Established Numerical Techniques for the Structural Analysis of a Regional Aircraft Landing Gear

Advances in Materials Science and Engineering, 2018
Usually during the design of landing gear, simplified Finite Element (FE) models, based on one-dimensional finite elements (stick model), are used to investigate the in-service reaction forces involving each subcomponent.
F. Caputo, A. De Luca, A. Greco, A. Marro, A. Apicella, R. Sepe, E. Armentani   +6 more
doaj   +1 more source

How emerging market firms learn to lead in complex product systems: Evidence from China's civil aircraft industry

Global Strategy Journal, EarlyView.
Abstract Research Summary The rise of emerging market lead firms (LFs) in global value chains (GVCs) challenges the prevailing view that only multinational corporations (MNCs) from advanced economies lead systems integration, design, and innovation activities.
Yuanyuan Wu, Paola Perez‐Aleman
wiley   +1 more source

Analysis of Coordinated Steering Performance in Multi‑wheel Landing Gears

Transactions of Nanjing University of Aeronautics and Astronautics
During aircraft ground steering， the nose landing gear （NLG） tires of large transport aircraft often experience excessive lateral loads， leading to sideslip. This compromises steering safety and accelerates tire wear.
GUI Xiwen, ZHANG Ming, SHI Xiazheng, HU Tianyang, XU Yuhan   +4 more
doaj   +1 more source

Spatiotemporal Pattern Evolution and Driving Mechanisms of World Botanical Gardens Over Five Centuries

Integrative Conservation, EarlyView.
This study presents a comprehensive review of the 500‐year spatiotemporal evolution of global botanical gardens, identifying three major development stages—initial exploration (1543–1699), steady expansion (1700–1899), and rapid proliferation (1900–2020)—with six distinct sub‐stages. We propose a tripartite driving framework grounded in colonial botany
Shidong Li, Guangzhen Shi, Qingwei Li
wiley   +1 more source

The formation of technical appearance of a helicopter-type unmanned aerial vehicle in part of take-off and landing devices that provide take-off and landing on the ship’s helicopter landing pad

Научный вестник МГТУ ГА
Due to the growing requirements to the fleet in terms of increasing the efficiency of solving assigned tasks, taking into account the ever-increasing operational situation, increased use of unmanned aerial vehicles is required, including small and medium-
D. V. Titov, A. E. Parnenkov, A. V. Kiselev   +2 more
doaj   +1 more source