Results 181 to 190 of about 1,220,175 (393)

Comparison of predicted engine core noise with current and proposed aircraft noise certification requirements [PDF]

, 1981
U. Von Glahn, D. Groesbeck
openalex   +1 more source

Kevlar/Basalt and Kevlar/Glass Intra‐Ply Reinforced Hybrid Composites: Influence of Basket Weave Fabric Structure on Thermal Properties, Flammability, and Impact Performance

Macromolecular Materials and Engineering, EarlyView.
This research explores the effect of basket weave fabric structure and fiber combinations in hybrid composites, focusing on impact resistance, thermal stability, and flammability. The findings demonstrate that Kevlar‐glass laminates offer superior thermal stability and impact strength compared to Kevlar‐basalt laminates.
Mahdi Hosseini, Milan Gaff, Petr Konvalinka, Haitao Li, Hynek Maňák, Jensin Joshua, Ahmad Hosseini, Krishna Teja, S. Yogeswari, Pritam Ghosh, M. Chandrasekar   +10 more
wiley   +1 more source

Control technology for future aircraft propulsion systems [PDF]

The need for a more sophisticated engine control system is discussed. The improvements in better thrust-to-weight ratios demand the manipulation of more control inputs. New technological solutions to the engine control problem are practiced.
Lehtinen, B., Merrill, W. C., Soeder, J. F., Szuch, J. R., Zeller, J. R.   +4 more
core   +1 more source

Dual cycle aircraft turbine engine [PDF]

, 1977
A method and apparatus are presented for improving operating efficiency over broad ranges of flight conditions and for reducing jet engine noise output in takeoff and landing by controlling the airflow entering and exiting the engines.
Nichols, M. R.
core   +1 more source

New technique for the direct measurement of core noise from aircraft engines [PDF]

, 1981
E. A. Krejsa
openalex   +1 more source

Practical Applications of Secondary/Extractive Electrospray Ionization (SESI): A Versatile Tool for Real‐Time Chemical Analysis

Mass Spectrometry Reviews, EarlyView.
ABSTRACT In the 1980s, researchers discovered the remarkable ability of electrospray plumes to effectively ionize gas‐phase molecules via secondary ionization. Around 20 years later—coinciding with the ambient mass spectrometry revolution—secondary electrospray ionization (SESI) and extractive electrospray ionization (EESI) coupled to mass spectrometry
Xin Luo, Huiling Wang, Xiaolan Hu, Sasho Gligorovski, Xue Li, Pablo Sinues   +5 more
wiley   +1 more source

Contribution of non‐orthogonal multiple access signalling to practical multibeam satellite deployments

International Journal of Satellite Communications and Networking, EarlyView., 2023
The potential gains of NOMA were evaluated in a satellite system with heterogeneous receivers, after considering the use of specific DVB‐S2X MODCODs, along with the impact of non‐linearities. It was concluded that a judicious power allocation in NOMA, jointly optimized with the IBO of the PAs, can yield significant sum‐rate gains.
Tomás Ramírez, Carlos Mosquera
wiley   +1 more source

Propulsion system study for Small Transport Aircraft Technology (STAT) [PDF]

Propulsion system technologies applicable to the generation of commuter airline aircraft expected to enter service in the 1990's are identified and evaluated in terms of their impact on aircraft operating economics and fuel consumption.
Hirschkron, R., Smith, C. E., Warren, R. E.   +2 more
core   +1 more source

Fire detection in aircraft engine nacelles :

, 1953
C S McCamy, William F Roeser
openalex   +1 more source

Full-Authority Digital Electronic Controls for Civil Aircraft Engines [PDF]

, 1981
R. E. Kendell
openalex   +1 more source