Data-driven analysis and new findings on the loss of tail rotor effectiveness in helicopter accidents. [PDF]
Sci Rep, 2022 Saleh JH +5 more
europepmc +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. +2 more
core +1 more source
Outdoor test stand performance of a convertible engine with variable inlet guide vanes for advanced rotorcraft propulsion [PDF]
A variable inlet guide van (VIGV) type convertible engine that could be used to power future high-speed rotorcraft was tested on an outdoor stand. The engine ran stably and smoothly in the turbofan, turboshaft, and dual (combined fan and shaft) power ...
Mcardle, Jack G.
core +1 more source
Comparison of predicted engine core noise with proposed FAA helicopter noise certification requirements [PDF]
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representative helicopter engines are compared with measured total helicopter noise levels and proposed FAA helicopter noise certification requirements.
Groesbeck, D. E., Vonglahn, U.
core +1 more source
Conceptual design and optimization of a sustainable and environmentally friendly archetypal helicopter within the selection criteria and limitations. [PDF]
Heliyon, 2023 Gunaltili E +6 more
europepmc +1 more source
Feasibility of water injection into the turbine coolant to permit gas turbine contingency power for helicopter application [PDF]
A system which would allow a substantially increased output from a turboshaft engine for brief periods in emergency situations with little or no loss of turbine stress rupture life is proposed and studied analytically.
Vanfossen, G. J.
core +1 more source
Helicopter turboshaft modeling via mixtures of experts
Machine Learning with ApplicationsA reliable and robust engine model is critical for helicopter design, operation, and maintenance, given the centrality of this sub-system. Several sources of uncertainty can limit the reliability and fidelity of first-principles models, necessitating ...
Aurelio Raffa Ugolini +4 more
doaj +1 more source
Helicopter Inside Cabin Acoustic Evaluation: A Case Study-IAR PUMA 330. [PDF]
Int J Environ Res Public Health, 2021 Deaconu M +3 more
europepmc +1 more source
The convertible engine: A dual-mode propulsion system [PDF]
A variable inlet guide vane (VIGV) convertible engine that could be used to power future high-speed rotorcraft was tested on an outdoor stand. The engine ran stably and smoothly in the turbofan, turboshaft, and dual (combined fan and shaft) power modes ...
Mcardle, Jack G.
core +1 more source
Sand Discharge Simulation and Flow Path Optimization of a Particle Separator. [PDF]
Entropy (Basel), 2023 Du Z, Ma Y, Xu Q, Wu F.
europepmc +1 more source