Aerodynamically Efficient Rotor Design for Hovering Agricultural Unmanned Helicopter
Journal of Applied Fluid Mechanics, 2017 Unmanned aerial vehicles, especially agricultural unmanned helicopters (AUH), are nowadays extensively used in precision agriculture. AUHs have recently become responsible for spraying fertilizers and pesticides for crop yields.
B. A. Haider +3 more
doaj
Chemistry – A European Journal, EarlyView.Solid‐state NMR spectroscopy reveals insights into interactions between formic acid and molecularly‐modified silica surfaces. Our findings contribute to a mechanistic understanding of the stabilization of formic acid by ionic liquid structures, with significant implications for the formic acid production from CO2 hydrogenation and adaptive catalysis ...
Yufei Wu +4 more
wiley +1 more source
A comparison of theory and experiment for coupled rotor body stability of a bearingless rotor model in hover and forward flight [PDF]
Seven cases were selected for correlation from a 1/5.86 Froude-scale experiment that examined several rotor designs which were being considered for full-scale flight testing as part of the Bearingless Main Rotor (BMR) program. The model rotor hub used in
Mirick, Paul H.
core +1 more source
Cytoskeleton, EarlyView.ABSTRACT Microtubules play essential roles in numerous cellular processes. All microtubules are built from the protein tubulin, yet individual microtubules can differ spatially and temporally due to their tubulin isotype composition and post‐translational modifications (PTMs).
Ezekiel C. Thomas +5 more
wiley +1 more source
Vibration Analysis of Aviation Electric Propulsion Test Stand with Active Main Rotor. [PDF]
Sensors (Basel)Kliza R +3 more
europepmc +1 more source
Molten Zinc Coordination Polymer Glass as a Host for Stable and Processable Optical Dye Composites
EcoEnergy, EarlyView.Zinc‐based coordination polymer glass is employed to suppress aggregation‐caused quenching (ACQ) and enhance molecular stability, enabling improved luminescence performance in the solid state. The emission color of the hybrid composites can be tuned by varying the incorporated guest molecules, while the glass matrix effectively prevents aggregation and
Jaeho Lee +10 more
wiley +1 more source
A parrot optimizer for solving multiobjective design sensor placement in helicopter main rotor blade. [PDF]
Sci RepAldawsari H.
europepmc +1 more source
NASA rotor system research aircraft flight-test data report: Helicopter and compound configuration [PDF]
The flight test activities of the Rotor System Research Aircraft (RSRA), NASA 740, from June 30, 1981 to August 5, 1982 are reported. Tests were conducted in both the helicopter and compound configurations.
Carter, R. D. G. +5 more
core +1 more source
Toward Safer and Sustainable Lithium Metal Batteries: Fluorine‐Free Solid Polymer Electrolytes
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.An analysis to assess the impact of fluorine in polymer electrolyte‐based lithium metal batteries has been conducted. It has been demonstrated that fluorine‐free LiTIM salt delivers a electrochemical performance similar to that of its fluorinated analogue salts, given the complete lithium dissociation in coordination with PEO and the restricted anion ...
David Fraile‐Insagurbe +10 more
wiley +1 more source
Rotor response for transient unbalance changes in a nonlinear simulation [PDF]
Transient unbalance shifts were determined not to excite a rotor instability in the high pressure turbomachinery of the Space Shuttle Main Engine using the current rotor dynamic models.
Beatty, R. F. +2 more
core +1 more source