Technology and benefits of aircraft counter rotation propellers [PDF]
Results are reported of a NASA sponsored analytical investigation into the merits of advanced counter rotation propellers for Mach 0.80 commercial transport application.
Bradley, E. +4 more
core +1 more source
Design, manufacture and spin test of high contact ratio helicopter transmission utilizing Self-Aligning Bearingless Planetary (SABP) [PDF]
A 450 hp high ratio Self-Aligning Bearingless Planetary (SABP) for a helicopter application was designed, manufactured, and spin tested under NASA contract NAS3-24539.
Folenta, Dezi, Lebo, William
core +1 more source
Concepts for Multi-Speed Rotorcraft Drive System - Status of Design and Testing at NASA GRC [PDF]
In several studies and on-going developments for advanced rotorcraft, the need for variable/multi-speed capable rotors has been raised. Speed changes of up to 50 percent have been proposed for future rotorcraft to improve vehicle performance.
Handschuh, Robert F. +2 more
core +1 more source
Research on gearbox temperature field image fault diagnosis method based on transfer learning and deep belief network. [PDF]
Sci Rep, 2023 Lu X, Li P.
europepmc +1 more source
Advanced Rotorcraft Transmission (ART) program-Boeing helicopters status report [PDF]
The Advanced Rotorcraft Transmission (ART) program is structured to incorporate key emerging material and component technologies into an advanced rotorcraft transmission with the intention of making significant improvements in the state of the art (SOA).
Lenski, Joseph W., Jr., Valco, Mark J.
core +1 more source
Digital Twin of a Gear Root Crack Prognosis. [PDF]
Sensors (Basel), 2023 Matania O, Bechhoefer E, Bortman J.
europepmc +1 more source
Mariner Mars 1969 SCAN control subsystem design and analysis [PDF]
Design and analysis of self correcting automatic navigation system for Mariner Mars ...
Horiuchi, H. H., Kerner, T.
core +1 more source
Nonlinear Dynamic Response Analysis of a Three-Stage Gear Train Based on Lightweight Calculation for Edge Equipment. [PDF]
Comput Intell Neurosci, 2022 Ren D, Yao Y, Wang H, Qu H, Wang G.
europepmc +1 more source
Transmission ratio-efficiency coupled modeling and high-efficiency zone design for multi-row planetary gear transmission of hybrid electric vehicles. [PDF]
Sci RepZhang Q, Ren C, Niu H.
europepmc +1 more source
Hybrid propulsion systems for motor vehicles with predominantly intermittent modes of operation [PDF]
A small delivery vehicle was equipped with a flywheel-hybrid drive and compared in test stand and driving tests with a conventional drive vehicle.
Bartsch, H., Helling, J., Schreck, H.
core +1 more source