Results 271 to 280 of about 231,082 (310)

Model 540 Main Rotor Blade Fatigue Test

1976
Abstract : The occurrence of catastrophic helicopter accidents due to Bell Model 540-11-250-1 main rotor blade structural failure triggered an Army-wide inspection to determine the condition of the existing 540 blade, and full-scale testing to verify the 1100-hour fatigue life of the Model 540 main rotor blade was conducted at the Eustis Directorate ...
Nicholas J. Calapodas, Arthur J. Gustafson   +1 more
openaire   +1 more source

The Main Rotor

2022
Kay Bruce, Occhiato John
openaire   +1 more source

Design Study of Expendable Main Rotor Blades

1972
Abstract : A design study is performed to determine the feasibility and cost advantages of expendable main rotor blades designed for the UH-1H helicopter. Technical feasibility, manufacturing cost, reliability, maintainability, and life-cycle costs were determined.
Carroll R. Akeley, Paul F. Maloney, Michael C. Frengley   +2 more
openaire   +1 more source

The Bearingless Main Rotor

Journal of the American Helicopter Society, 1980
Peter G. C. Dixon, Harold E. Bishop
openaire   +1 more source

Autogyro Main Rotor Blade Strength Tests

2023 IEEE 10th International Workshop on Metrology for AeroSpace (MetroAeroSpace), 2023
Zbigniew Czyż, Piotr Podolak, Krzysztof Skiba, Patryk Jakubczak, Paweł Karpiński, Patryk Różylo, Magda Droździel-Jurkiewicz   +6 more
openaire   +1 more source

Effect of rotor blade tip shape on helicopter main-rotor performance

2021
EFFECT OF ROTOR BLADE TIP SHAPE ON HELICOTER MAIN-ROTOR PERFORMANCE SUMMARY A helicopter is an aircraft that uses rotating wings to provide lift, propulsion, and control. The rotary wings can produce aerodynamics forces, which are generated by the relative motion of a wing surface with respect to the air, even when the velocity of the vehicle itself is
openaire   +1 more source

The Effect of Helicopter Main Rotor Blade Damage on the Rotor Disk (Whole Rotor) Motion

2000
Abstract : When a helicopter main rotor blade is ballistically damaged, an imbalance is created in the rotor, causing the rotor disk to execute unwanted motions, which are detrimental to performance. The normally smooth-flying helicopter develops new vibrations that can be physiologically annoying or debilitating to the pilot, can exceed structural ...
openaire   +1 more source

Cancer epigenetics in clinical practice

Ca-A Cancer Journal for Clinicians, 2023
Veronica Davalos, Manel Esteller
exaly  

Parametric structure optimization of a main rotor blade as an application for FSI analysis in main rotor optimization process

Aircraft Engineering and Aerospace Technology
Purpose Modern warfare and modern battlefield are very demanding. The recent conflicts showed that the usage of the helicopters is very limited and only the best constructions are able to provide support for the operations. The purpose of this research is to show the possibilities of new design tool for main rotor aerostructural optimization.
Jakub Kocjan, Robert Rogólski
openaire   +1 more source

Helicopter Main Rotor Transmission Output Shaft Failure

2019
Abstract A helicopter had just taken off when there was a loud bang and the engine started to overspeed. After landing and inspection, the transmission was disassembled. It was discovered that the assembly containing the output shaft to the main rotor had failed.
openaire   +1 more source