Results 21 to 30 of about 98,557 (299)
Study on the impact of Gurney flap parameters on rotor performance improvement
Hangkong gongcheng jinzhanAt present, most of the research on installing Gurney flaps is focused on two-dimensional airfoils. The three-dimensional blade model is established to investigate the influence of different Gurney flap parameters on rotor aerodynamic performance ...
LIU Shaoteng +3 more
doaj +1 more source
Disturbance observer based sliding mode control for unmanned helicopter hovering operations in presence of external disturbances [PDF]
INCAS Bulletin, 2018 Numerous control techniques are developed for miniature unmanned helicopters to do hover operation with each method having its own advantages and limitations.
Ihsan ULLAH, Hai-Long PEI
doaj +1 more source
Aerodynamic Performance of a Coaxial Hex-Rotor MAV in Hover
Aerospace, 2021 Micro aerial vehicles (MAVs) usually suffer from several challenges, not least of which are unsatisfactory hover efficiency and limited fly time. This paper discusses the aerodynamic characteristics of a novel Hex-rotor MAV with a coaxial rotor capable ...
Yao Lei, Jiading Wang, Wenjie Yang
doaj +1 more source
A comparison of coaxial and conventional rotor performance [PDF]
, 2009 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, Brown, Kim, Landgrebe, Newman
core +1 more source
AerospaceIn the vertical take-off and landing (VTOL) state of tiltrotor aircraft, the inlet entrance encounters the incoming airflow at a 90° attack angle, resulting in highly complex internal flow characteristics that are extremely susceptible to gusts ...
Haicheng Zhu +6 more
doaj +1 more source
Carrying Bricks: Guiding Pre-Tenure Program Coordinators from Survival to Superstars
Journal of Higher Education Policy and Leadership Studies, 2022 The purpose of this article is to discuss a) the dual role of the assistant professor/ program coordinator, b) specific strategies for developing pre-tenure survival skills and c) leveraging the pseudo administrative duties of a program coordinator to ...
Jim K. Rost, Ashlee Hover
doaj +1 more source
A Rapid Prediction Model of Three-Dimensional Ice Accretion on Rotorcraft in Hover Flight
AerospaceHelicopters often operate at altitudes where cloud activity is prevalent, making them susceptible to icing hazards. Accurate and rapid prediction of ice accretion on rotors is crucial for expanding helicopter flight capabilities and enhancing flight ...
Weibin Li +5 more
doaj +1 more source
Aerodynamic Performance of Quadrotor UAV with Non-Planar Rotors
Applied Sciences, 2019 The mobility of a quadrotor UAV is significantly affected by its aerodynamics, especially when the closely spaced rotors are applied in the multi-rotor system.
Yao Lei, Jinli Wang
doaj +1 more source
Numerical Simulations on the PSP Rotor Using HMB3 [PDF]
, 2018 This work presents CFD analyses of the isolated Pressure Sensitive Paint (PSP) model rotor blade in hover and forward flight using the structured multi-block CFD solver of Glasgow University.
Barakos, G.N., Jimenez-Garcia, A.
core +1 more source
AAA+ protein unfoldases—the Moirai of the proteome
FEBS Letters, EarlyView.AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley +1 more source