Results 41 to 50 of about 1,125 (144)

A Sequential Shifting Algorithm for Variable Rotor Speed Control [PDF]

, 2007
A proof of concept of a continuously variable rotor speed control methodology for rotorcraft is described. Variable rotor speed is desirable for several reasons including improved maneuverability, agility, and noise reduction.
DeCastro, Jonathan A., Edwards, Jason M., Litt, Jonathan S.   +2 more
core   +1 more source

A Quiet Helicopter for Air Taxi Operations [PDF]

NASA is exploring rotorcraft designs for VTOL air taxi operations, also known as urban air mobility (UAM) or on-demand mobility (ODM) applications. Several concept vehicles have been developed, intended to focus and guide NASA research activities in ...
Johnson, Wayne
core   +1 more source

Baseline Assumptions and Future Research Areas for Urban Air Mobility Vehicles [PDF]

NASA is developing Urban Air Mobility (UAM) concepts to (1) create first-generation reference vehicles that can be used for technology, system, and market studies, and (2) hypothesize second-generation UAM aircraft to determine high-payoff technology ...
Antcliff, Kevin, Kohlman, Lee, Silva, Chris, Whiteside, Siena   +3 more
core   +1 more source

Study of an advanced General Aviation Turbine Engine (GATE) [PDF]

The best technology program for a small, economically viable gas turbine engine applicable to the general aviation helicopter and aircraft market for 1985-1990 was studied.
Curry, C. E., Gill, J. C., Humphrey, J. M., Orelup, M. J., Short, F. R., Staton, D. V., Vaught, J. M., Zolezzi, B. A.   +7 more
core   +1 more source

Advanced General Aviation Turbine Engine (GATE) concepts [PDF]

Concepts are discussed that project turbine engine cost savings through use of geometrically constrained components designed for low rotational speeds and low stress to permit manufacturing economies.
Lays, E. J., Murray, G. L.
core   +1 more source

Rotorcraft flight-propulsion control integration: An eclectic design concept [PDF]

The NASA Ames and Lewis Research Centers, in conjunction with the Army Research and Technology Laboratories, have initiated and partially completed a joint research program focused on improving the performance, maneuverability, and operating ...
Ballin, Mark G., Mihaloew, James R., Ruttledge, D. C. G.   +2 more
core   +1 more source

The Helicopter Turboshaft Engine’s Reconfigured Dynamic Model for Functional Safety Estimation

Electronics
This research substantiates the necessity for developing and implementing structural reconfiguration methods for automatic control systems in the event of a parametric sensor failure to enhance the helicopter turboshaft engine’s overall reliability and safety.
Serhii Vladov, Viacheslav Kovtun, Valerii Sokurenko, Oleksandr Muzychuk, Victoria Vysotska   +4 more
openaire   +1 more source

General Aviation Turbine Engine (GATE) study [PDF]

The feasibility of turbine engines for the smaller general aviation aircraft was investigated and a technology program for developing the necessary technology was identified.
Baerst, C. F., Furst, D. G.
core   +1 more source

Data-driven analysis and new findings on the loss of tail rotor effectiveness in helicopter accidents. [PDF]

Sci Rep, 2022
Saleh JH, Xu Z, Guvir AI, Margousian A, Zhang W, Ma M.   +5 more
europepmc   +1 more source

Neural Network Approximation of Helicopter Turboshaft Engine Parameters for Improved Efficiency

Energies
The work is devoted to the development of a method for neural network approximation of helicopter turboshaft engine parameters, which is the basis for researching engine energy characteristics to improve efficiency, reliability, and flight safety. It is proposed to use a three-layer direct propagation neural network with linear neurons in the output ...
Serhii Vladov, Ruslan Yakovliev, Maryna Bulakh, Victoria Vysotska   +3 more
openaire   +2 more sources