Results 21 to 30 of about 5,063 (265)
Low-noise flapping wings with tensed membrane [PDF]
, 2020 Micro air vehicles with flapping wings have the potential to be both more efficient and maneuverable than similar-sized fixed- or rotary-wing aircraft.
Nguyen, Quoc Viet +3 more
core +1 more source
Nitrogen-Substitution in the Flapping Wings of Cyclooctatetraene-Fused Molecules
, 2021 New synthetic protocols to the nitrogen-embedded flapping molecules have been developed. Gram-scale synthesis of a key precursor, tetraamine of dibenzo[a,e]cyclooctatetraene has been established for designing flapping quinoxaline and flapping ...
Kensuke, Suga +2 more
core +1 more source
The aerodynamic effects of wing–wing interaction in flapping insect wings
Journal of Experimental Biology, 2005 SUMMARYWe employed a dynamically scaled mechanical model of the small fruit fly Drosophila melanogaster (Reynolds number 100–200) to investigate force enhancement due to contralateral wing interactions during stroke reversal (the `clap-and-fling'). The results suggest that lift enhancement during clap-and-fling requires an angular separation between ...
Lehmann, Fritz-Olaf +2 more
openaire +3 more sources
Research and Test of X-wing Flapping-wing Mechanism Based on the Crank Slider Mechanism
Jixie chuandong, 2023 A X-wing flapping-wing mechanism with wings flapping symmetrically is designed. The crank slider mechanism is adopted to convert the circular motion of the crank into the linear reciprocating motion of the straight shaft, and the straight shaft drives ...
Huang Xiansheng, Cai Yu, Li Qi, Liu Bin
doaj
Dynamic Analysis and Optimization of a Bionic Flapping-Wing Aircraft
Engineering Transactions, 2016 This research has been conducted for the purpose of developing bionic flapping-wing aircraft. In this paper, wings are regarded as flexible, and the response issues of wings under certain excitation functions are investigated.
Xiaoyi JIN +4 more
doaj +1 more source
A Bio-Inspired Flapping Wing Rotor of Variant Frequency Driven by Ultrasonic Motor
Applied Sciences, 2020 By combining the flapping and rotary motion, a bio-inspired flapping wing rotor (FWR) is a unique kinematics of motion. It can produce a significantly greater aerodynamic lift and efficiency than mimicking the insect wings in a vertical take-off and ...
Si Chen +4 more
doaj +1 more source
Parametric Study on Aerodynamic Performance of a Flapping Wing Rotor MAV Capable of Sustained Flight
Aerospace, 2022 By combining the flapping and rotary motion, a flapping wing rotor (FWR) shows unique kinematics of motion. It can produce a significantly higher aerodynamic efficiency and lift coefficient than insect-like flapping wings.
Ziyu Wang +5 more
doaj +1 more source
Kinematic Optimization of a Flexible Wing Undergoing Flapping and Pitching
Shock and Vibration, 2021 In recent years, there has been widespread interest in the design of microair vehicles (MAVs) for flapping flight with high-aspect ratio wings due to their high efficiency and energy savings.
Yue Wu +3 more
doaj +1 more source
AIP Advances, 2023 An innovative morphing scheme, i.e., dynamical chordwise retracting and stretching, has been proposed for flapping wings. Its aerodynamic effects have been investigated based on a plunging two-dimensional flat wing.
Kang Liu +4 more
doaj +1 more source
Structural Analysis of a Dragonfly Wing
, 2010 Dragonfly wings are highly corrugated, which increases the stiffness and strength of the wing significantly, and results in a lightweight structure with good aerodynamic performance.
Jongerius, S.R. +3 more
core +1 more source