Results 101 to 110 of about 10,614 (216)
Design study of TDRS antenna gimbal system for LANDSAT-D [PDF]
The conceptual design studies of a two axis antenna drive assembly for the TDRSS link communications subsystem for LANDSAT D are presented. The recommended antenna drive assembly is a simple and reliable design substantially similar to the antenna and ...
Wu, J.
core +1 more source
Magnetic attachment mechanism [PDF]
A magnetic attachment mechanism adapted for interfacing with the manipulator arm of a remote manipulator system and comprising a pair of permanent magnets of rare earth material are arranged in a stator-rotor relationship.
Harwell, William D., Wu, Mitchell B.
core +1 more source
Vorticity-transport and unstructured RANS investigation of rotor-fuselage interactions [PDF]
, 2009 The prediction capabilities of unstructured primitive-variable and vorticity-transport-based Navier-Stokes solvers have been compared for rotorcraft-fuselage interaction.
Brown, Richard +3 more
core
AerospaceRotor-to-rotor interactions have been found to significantly contribute to acoustic characteristics. The present research presents a novel idea to conduct comparative studies on the aeroacoustics characteristics of conventional, coaxial, and hybrid ...
Aqib Aziz, Yongjie Shi
doaj +1 more source
Forward Flight Rotor Performance at Martian Atmospheric Densities and Sensitivity to Low Reynolds Numbers [PDF]
Much effort has been made to enhance exploration on Mars. In addition to a rover and Mars-orbiting satellites, a Mars Helicopter Technology Demonstrator was proposed by the NASA Jet Propulsion Laboratory (JPL) to augment planetary research for the Mars ...
Perez Perez, Brenda NAtalia
core +1 more source
Journal of Industrial Design and Engineering Graphics, 2011 The objective of this paper is to analyze the role of helicopter rotor, to classify them by type, and to imagine new types of helicopter rotors that can equip future helicopters.
IONESCU Cristian Andrei
doaj
Influence of Lift Offset on Rotorcraft Performance [PDF]
The influence of lift offset on the performance of several rotorcraft configurations is explored. A lift-offset rotor, or advancing blade concept, is a hingeless rotor that can attain good efficiency at high speed, by operating with more lift on the ...
Johnson, Wayne
core +2 more sources
Index to nasa tech briefs, issue number 2 [PDF]
, 1965 Annotated bibliography on technological innovations in NASA space ...
core +1 more source
ActuatorsThis research introduces the first design concept for a ducted coaxial-rotor amphibious spherical robot (BYQ-A1), utilizing the principle of variable mass control.
Dongshuai Huo +3 more
doaj +1 more source
Computational Study of NASA's Quadrotor Urban Air Taxi Concept [PDF]
High-fidelity computational fluid dynamics simulations have been carried out in order to analyze NASA's quadrotor urban air taxi concept for urban air mobility, also know as on-demand mobility applications. High-order accurate schemes, dual-time stepping,
Ventura Diaz, Patricia, Yoon, Seokkwan
core +1 more source