Results 241 to 250 of about 22,232 (271)

Cracking in a Tail Rotor Blade in a Helicopter

2005
Abstract The tail rotor blade of a helicopter developed a visible crack during service. The cracked region was removed from the blade and the fracture surface was examined in a SEM, revealing shallow pitting on the inside surface of the skin and a corresponding reduction in thickness. Based on these findings, investigators concluded that
openaire   +1 more source

Method for the Extraction of Helicopter Main and Tail Rotor Noise

Journal of Aircraft, 2018
In this paper a method for the extraction of main and tail rotor noise from an acoustic pressure time history of a helicopter is described.
openaire   +2 more sources

Aeroacoustic investigation of a ducted tail rotor

AIAA AVIATION 2023 Forum, 2023
Prateek Jaiswal, Jose Rendon, Yann Pasco, Marlène Sanjosé, Stephane Moreau   +4 more
openaire   +1 more source

Solid Lubricants for Helicopter Tail Rotor Gearboxes

1970
Abstract : Solid lubricants as retainers in rolling bearings and as idlers for load gearswere evaluated in a Bell UH-1 helicopter tail rotor drive gearbox under normallubricated conditions and also under emergency conditions of dry operation.Solid lubricants provided satisfactory gearbox operation using conventionalfluid lubrication in all tests at ...
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Numerical investigation and optimization for interior duct shape of ducted tail rotor

Aerospace Science and Technology, 2021
Chenkai Cao, Guoqing Zhao, Qijun Zhao
exaly  

Tail Rotor Performance in Presence of Main Rotor, Ground, and Winds

Journal of the American Helicopter Society, 1974
Wayne Wiesner, Gary Kohler
openaire   +1 more source

Description of a Dynamical Framework to Analyse the Helicopter Tail Rotor

Dynamics, 2021
Salvador Castillo-Rivera, M Tomas-Rodriguez   +1 more
exaly  

Landing Trajectory and Control Optimization for Helicopter in Tail Rotor Pitch Lockup

Lecture Notes in Computer Science, 2023
Xufei Yan, Renliang Chen, Anhuan Xie
exaly  

Composite Bearingless Tail Rotor for UTTAS

Journal of the American Helicopter Society, 1977
Ronald R. Fenaughty, William L. Noehren
openaire   +1 more source

Optimization of Duct Shape for Improving Aerodynamic Performance of Ducted Tail Rotor

International Journal of Aeronautical and Space Sciences, 2022
Bo Wang, Guoqing Zhao, Qijun Zhao
exaly