Results 141 to 150 of about 15,230 (231)

Micro-Doppler radar deception and camouflage of airborne targets. [PDF]

Sci Rep
Kozlov V, Sheleg A, Vovchuk D, Melnitsky R, Glam A, Boag A, Ginzburg P.   +6 more
europepmc   +1 more source

An analytically linearized helicopter model with improved modeling accuracy [PDF]

An analytically linearized model for helicopter flight response including rotor blade dynamics and dynamic inflow, that was recently developed, was studied with the objective of increasing the understanding, the ease of use, and the accuracy of the model.
Curtiss, H. C., Jr., Jensen, Patrick T., Mckillip, Robert M., Jr.   +2 more
core   +1 more source

Vibration Analysis of Aviation Electric Propulsion Test Stand with Active Main Rotor. [PDF]

Sensors (Basel)
Kliza R, Wendeker M, Drozd P, Siadkowska K.   +3 more
europepmc   +1 more source

Experimental and Numerical Analysis of Chlorinated Polyethylene Honeycomb Mechanical Performance as Opposed to an Aluminum Alloy Design. [PDF]

Materials (Basel), 2022
Baciu F, Hadăr A, Voicu AD, Vlăsceanu D, Tudose DI.   +4 more
europepmc   +1 more source

NASA rotor system research aircraft flight-test data report: Helicopter and compound configuration [PDF]

The flight test activities of the Rotor System Research Aircraft (RSRA), NASA 740, from June 30, 1981 to August 5, 1982 are reported. Tests were conducted in both the helicopter and compound configurations.
Carter, R. D. G., Cross, J. L., Erickson, R. E., Ericson, W. F., Hodge, R. W., Kufeld, R. M.   +5 more
core   +1 more source

Research on the aerodynamic characteristics of eVTOL aircraft ducted rotor tip embedded inside the ducted body. [PDF]

Sci Rep
Du S, Zha Y, Li C, Lu Z, Zhao Q.
europepmc   +1 more source

Review and analysis of the DNW/Model 360 rotor acoustic data base [PDF]

A comprehensive model rotor aeroacoustic data base was collected in a large anechoic wind tunnel in 1986. Twenty-six microphones were positioned around the azimuth to collect acoustic data for approximately 150 different test conditions.
Boxwell, D. A., Spencer, R. H., Zinner, R. A.   +2 more
core   +1 more source

Investigation on rub-impact response characteristics of gas generator rotor system under external excitation. [PDF]

Sci Rep
Zhang H, Liu T, Zhao H, Wang Q.
europepmc   +1 more source

Rotor-vortex interaction noise [PDF]

A theoretical and experimental study was conducted to develop a validated first principles analysis for predicting noise generated by helicopter main-rotor shed vortices interacting with the tail rotor.
Amiet, R. K., Schlinker, R. H.
core   +1 more source

Coded Ultrasonic Ranging for the Distance Measurement of Coaxial Rotor Blades. [PDF]

Micromachines (Basel)
Lu Y, Qiu Z, Zhang S, Hu W, Qiu Y, Qiu Z.   +5 more
europepmc   +1 more source