Results 111 to 120 of about 25,565 (312)
Flow visualization and flow field measurements of a 1/12 scale tilt rotor aircraft in hover [PDF]
The results are given of flow visualization studies and inflow velocity field measurements performed on a 1/12 scale model of the XV-15 tilt rotor aircraft in the hover mode.
Coffen, Charles D. +3 more
core +1 more source
Advanced Science, EarlyView.Inspired by nature's competitive maneuvers, this study introduces a combustion‐driven soft actuator that powers a multi‐modal “Jump‐and‐Fly Catbot” (JFC). With millisecond response, high‐force output (over 70 times its weight) and precise control (error within 5%), the robot can jump, fly, hover, and escape from challenging environments, achieving ...
Hongkuan Ma +4 more
wiley +1 more source
Study on aerodynamic characteristics of tilting wing unmanned aerial vehicle in transition state
Hangkong gongcheng jinzhanIn response to the problem of the continuous tilting transition process of the configuration of unmanned aerial vehicle with complex and unsteady aerodynamic characteristics, the real blade is replaced with a virtual propeller disk model, the rotor flow ...
MA Kai +4 more
doaj +1 more source
Flight researh at NASA Ames Research Center: A test pilot's perspective [PDF]
In 1976 NASA elected to assign responsibility for each of the various flight regimes to individual research centers. The NASA Ames Research Center at Moffett Field, California was designated lead center for vertical and short takeoff and landing, V/STOL ...
Hall, G. Warren
core +1 more source
Electrostatically controlled micromechanical gyroscope [PDF]
, 1994 An integrated electrostatically-controlled micromechanical gyroscope with a rotor encompassed within a rotor cavity and electrostatically spun within the cavity.
Hawkey, Timothy +2 more
core +1 more source
Towards Efficient Full Pose Omnidirectionality with Overactuated MAVs
, 2018 Omnidirectional MAVs are a growing field, with demonstrated advantages for aerial interaction and uninhibited observation. While systems with complete pose omnidirectionality and high hover efficiency have been developed independently, a robust system ...
CW Wampler +4 more
core +1 more source
Advanced Science, EarlyView.Chromosome segregation in Streptococcus pneumoniae depends on RocS, a bitopic protein whose membrane‐anchoring mechanisms were unclear. Using NMR and AFM, this study reveals that the widely conserved RocS anchor binds to membranes via a conserved kink‐helix motif which inserts into lipid nanodomains.
Ana Álvarez‐Mena +11 more
wiley +1 more source
The XV-15 tilt rotor research aircraft [PDF]
The design characteristics of the XV-15 Tilt rotor research aircraft are presented. Particular attention is given to the following: control system; conversion system; and propulsion system.
Dugan, D. C. +2 more
core +1 more source
Advanced Energy Materials, EarlyView.The densification process of Li6PS5Cl powders with varying particles size distributions reveals differences in smaller and larger distributions. Higher strain is revealed for the smaller particle size distribution from X‐ray diffraction. Discrete element method simulations uncover that the reason for the higher strain is not the particle size itself ...
Vasiliki Faka +14 more
wiley +1 more source
Aerodynamic characteristics of a powered tilt-proprotor wind tunnel model [PDF]
An investigation was conducted in the Langley V/STOL tunnel to determine the performance, stability and control, and rotor-wake interaction effects of a powered tilt-proprotor aircraft model with gimbal-hub rotors.
Freeman, C. E. +2 more
core +1 more source