Results 221 to 230 of about 64,260 (282)

Fault Diagnosis Method for Pumping Station Units Based on the tSSA-Informer Model. [PDF]

Sensors (Basel)
Tian Q, Yang H, Tian Y, Guo L.
europepmc   +1 more source

Aerodynamics Analysis of Helicopter Rotor in Flight Test Using Strain Gauge Sensors. [PDF]

Sensors (Basel)
Jiao S, Zheng J.
europepmc   +1 more source

Extensive cultivation of human gut phages revealing undescribed <i>Bacteroidaceae</i> phages. [PDF]

Gut Microbes
Liu Z, Yang Y, Mao S, Wang Z, Zhu Q, Yuan Y, Xiang Y.   +6 more
europepmc   +1 more source

Intrinsically disordered cytoplasmic tail in netrin receptor DCC binds the large ribosomal subunit to inhibit translation. [PDF]

J Biol Chem
Paukovich N, Spear EA, MacFadden A, Nowling NN, Henen MA, Vögeli B, Filbin ME.   +6 more
europepmc   +1 more source

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Helicopter Main-Rotor/Tail-Rotor Interaction

Journal of the American Helicopter Society, 2000
Preliminary results from a study to model the interaction aerodynamics and aeroacoustics of the main and tail rotor of a helicopter in subsonic flow are presented. The configurations studied are: 1) two bladed main and tail rotors in hover, and 2) a four-bladed main rotor and two-bladed tail rotor in climbing flight.
Yin, J., Ahmed, S.R.
openaire   +3 more sources

Helicopter tail rotor noise

10th Aeroacoustics Conference, 1986
A study was made of helicopter tail rotor noise, particularly that due to interactions with the main rotor tip vortices, and with the fuselage separation mean wake. The tail rotor blade-main rotor tip vortex interaction is modelled as an airfoil of infinite span cutting through a moving vortex.
S.-T. CHOU, A. GEORGE
openaire   +1 more source

Aerodynamics and aeroacoustics of helicopter main-rotor/tail-rotor interaction

5th AIAA/CEAS Aeroacoustics Conference and Exhibit, 1999
Preliminary results from an ongoing effort to model the interaction aerodynamics and aeroacoustics of main- and tail rotor of a helicopter in subsonic flow are presented. The configurations studied are a) a two-blade main- and tail rotor in hover, and b) a four-blade main- and a two-blade tail rotor in climb flight.
Ahmed, S.R., Yin, J.
openaire   +2 more sources

Effect of tail-rotor torque variation on vibration at helicopter tail-rotor drive-train

2018 IEEE Aerospace Conference, 2018
Condition monitoring and fault diagnostics in rotorcraft have significant effect on improving safety level and reducing operational and maintenance costs. Most of the commercially available diagnostic tools for rotating machinery are based on vibration analysis.
Michael R. Habib, Mohammed A. Hassan, Abdel M. Bayoumi   +2 more
openaire   +1 more source

Rotor Performance of a Full-Scale Heated Tail Rotor

Proceedings of the Vertical Flight Society 71st Annual Forum, 2015
A CFD approach using the NASA OVERFLOW code to predict the impact of ice accretion on a Bell 206 tail rotor is evaluated. The basis for the computational study is a test, conducted at the NASA Glenn Icing Research Wind Tunnel. The test acquired thrust and power measurements before, during, and after various ice accretion and blade heating ...
Jason Wright, Robert Narducci, Roger Aubert   +2 more
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Designing to Survive Tail Rotor Loss

Journal of the American Helicopter Society, 1976
The development and application of a mathematical model for predicting sideslip during flight without a tail rotor are described in this paper. This method of analysis can he used to properly size a fin which will have sufficient static and dynamic stability to provide “fly‐back” capability if the tail rotor is lost, is damaged, or fails.
Terri J. Horst, Robert J. Reschak
openaire   +1 more source