Results 91 to 100 of about 2,713 (191)

Measured noise reductions resulting from modified approach procedures for business jet aircraft [PDF]

Five business jet airplanes were flown to determine the noise reductions that result from the use of modified approach procedures. The airplanes tested were a Gulfstream 2, JetStar, Hawker Siddeley 125-400, Sabreliner-60 and LearJet-24.
Burcham, F. W., Jr., Lasagna, P. L., Parish, O. O., Putnam, T. W.   +3 more
core   +1 more source

Search and dissemination in data processing [PDF]

Manual retrieval methods were used to complete 54 searches of interest for the General Aviation Newsletter. Subjects of search ranged from television transmission to machine tooling, Apollo moon landings, electronic equipment, and aerodynamics ...
Dittmar, V., Dodd, B., Gold, C. H., Moore, A. M.   +3 more
core   +1 more source

J-85 jet engine noise measured in the ONERA S1 wind tunnel and extrapolated to far field [PDF]

Noise from a J-85 turbojet with a conical, convergent nozzle was measured in simulated flight in the ONERA S1 Wind Tunnel. Data are presented for several flight speeds up to 130 m/sec and for radiation angles of 40 to 160 degrees relative to the upstream
Atencio, Adolph, Jr., Julienne, Alain, Soderman, Paul T.   +2 more
core   +1 more source

Index to 1981 NASA Tech Briefs, volume 6, numbers 1-4 [PDF]

, 1986
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage ...

core   +1 more source

A Novel Curve-and-Surface Fitting-Based Extrapolation Method for Sub-Idle Component Characteristics of Aeroengines

Aerospace
The component characteristics of an aeroengine below idle speed are fundamental for start-up process simulations. However, due to experimental limitations, these characteristics must be extrapolated from data above idle speed.
Yibo Cui, Tianhong Zhang, Zhaohui Cen, Younes Al-Younes, Elias Tsoutsanis   +4 more
doaj   +1 more source

Assessment of a regulatory measurement system for the determination of the non-volatile particulate matter emissions from commercial aircraft engines. [PDF]

J Aerosol Sci, 2021
Kinsey JS, Giannelli R, Howard R, Hoffman B, Frazee R, Aldridge M, Leggett C, Stevens K, Kittelson D, Silvis W, Stevens J, Lobo P, Achterberg S, Swanson J, Thomson K, McArthur T, Hagen D, Trueblood M, Wolff L, Liscinsky D, Arey R, Cerully K, Miake-Lye R, Onasch T, Freedman A, Bachalo W, Payne G, Durlicki M.   +27 more
europepmc   +1 more source

Network Structure and Industrial Dynamics. The long-term evolution of the aircraft-engine industry [PDF]

This paper proposes a new approach to explain the long-term evolution of a supplier industry. The network of vertical relations between suppliers and buyers is identified as a determinant of the concentration of the supplier industry and of the dynamics ...
Andrea Bonaccorsi, Paola Giuri
core  

DBO-CNN-BiLSTM: Dung Beetle Optimization Algorithm-Based Thrust Estimation for Micro-Aero Engine

Aerospace
Thrust constitutes a pivotal performance parameter for aircraft engines. Thrust, being an indispensable parameter in control systems, has garnered significant attention, prompting numerous scholars to propose various methods and algorithms for its ...
Baijun Lei, Haozhong Huang, Guixin Chen, Jianguo Liang, Huigui Long   +4 more
doaj   +1 more source

An Experimental Investigation to Use the Biodiesel Resulting from Recycled Sunflower Oil, and Sunflower Oil with Palm Oil as Fuels for Aviation Turbo-Engines. [PDF]

Int J Environ Res Public Health, 2021
Cican G, Deaconu M, Mirea R, Ceatra LC, Cretu M.   +4 more
europepmc   +1 more source

Experimental evaluation of the effect of inlet distortion on compressor blade vibrations [PDF]

Compressor rotor strain gage data from an engine test conducted with an inlet screen distortion were reduced and analyzed. These data are compared to data obtained from the same engine without inlet pressure distortion to determine the net effect of the ...
Lubomski, J. F.
core   +1 more source