Analysis of airplane design by similarity considerations.
Airplane design analysis by operational similarity parameters and coefficients, noting aircraft applications range from DC-3 to SST
Werner, R. A.↗
SEARCH · Engineering Papers
Results for “operational analysis”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Nickel-cadmium battery test project - Relationship between operation, life, and failure mechanism. Volume 3 - Analysis of the cells and their components
Nickel cadmium batteries operated in related cycling schemes with resulting dry separators
Halpert, G.↗
High voltage solar array study Final report
Analysis of operating problems of high voltage solar array in earth orbit
Oman, H.↗
A sweep gas facility for fission gas release studies at the NASA Plum Brook Reactor
Helium sweep gas facility design and operation for analysis of reactor fission gas-isotope release rates for space power reactor fuel element design
Kirchgessner, T. A.↗
Space rescue operations. Volume 2: technical discussion
Contingency planning, rescue vehicle requirements, operational considerations, and system analysis for space rescue operations - Vol. 2
Hinton, M. G., Jr.↗
Design, operation and post-test analysis of a high performance cylindrical converter
Long term stability and post test analysis of vapor deposited W emitters in high performance cylindrical thermionic converters
Case, J. M.↗
Modular space station phase B extension: NASA headquarters quarterly review
Progress in the modular space station development program is reported. The space station project office organization and the manner in which the center interfaces with NR are presented along with a sortie and experiment analysis. The operations, subsystems and configurations are reviewed, and future activities are listed.
Cole, E. G.↗
Apollo experience report: Structural loads due to maneuvers of the command and service module/lunar module
Analyses were performed to determine the structural loads caused by maneuvers of the docked Apollo command and service module/lunar module (CSM/LM). Results of CSM/LM docked interface loads analyses and service-propulsion-system engine support structure load analyses are compared with the structural allowable loads of the CSM/LM docked interface and the service-propulsion-system engine thrust mount, respectively, for different phases of spaceflight operations. An analysis also was performed to investigate the loads that resulted from the failure case in which the LM descent propulsion system is started in the full-throttle position.
Rutkowski, M. J.↗
System safety in the operational phase
The operational phase of system safety is investigated. Data cover manufacturing, test operations, materials handling, flight tests, and operational mission analysis.
John Gera, Jr↗
Data processing for astronomy missions.
The functions which must be performed to ensure the effective and efficient use of a space astronomical observatory may be separated into three major categories, including mission planning and analysis, mission operations, and data utilization. Each of these functions can be further subdivided. The most suitable locations for conducting the data processing operations in each case must be determined on the basis of criteria which take into account economical and operational factors. An advanced operational concept for an astronomical observatory is discussed.
Ludwig, G. H.↗
Advanced missions safety. Volume 2: Technical discussion. Part 3: Emergency crew transfer
An evaluation of methods for emergency rescue of space crews using the Earth Orbit Shuttle was conducted. Emergency situations were analyzed for the mission categories of extravehicular activity, space shuttle orbiter, space station, and research applications module (RAM). Five different transfer concept categories were analyzed and each was scored on the basis of its operational effectiveness. A cost analysis of the transfer operations was developed.
Source record↗
Synchronization using pulsed edge tracking in optical PPM communication system
A pulse position modulated (PPM) optical communication system using narrow pulses of light for data transmission requires accurate time synchronization between transmitter and receiver. The presence of signal energy in the form of optical pulses suggests the use of a pulse edge tracking method of maintaining the necessary timing. The edge tracking operation in a binary PPM system is examined, taking into account the quantum nature of the optical transmissions. Consideration is given first to pure synchronization using a periodic pulsed intensity, then extended to the case where position modulation is present and auxiliary bit decisioning is needed to aid the tracking operation. Performance analysis is made in terms of timing error and its associated statistics. Timing error variances are shown as a function of system signal to noise ratio.
Gagliardi, R.↗
Parameter estimation supplement to the Mission Analysis Evaluation and Space Trajectory Operations program (MAESTRO)
This Parameter Estimation Supplement describes the PEST computer program and gives instructions for its use in determination of lunar gravitation field coefficients. PEST was developed for use in the RAE-B lunar orbiting mission as a means of lunar field recovery. The observations processed by PEST are short-arc osculating orbital elements. These observations are the end product of an orbit determination process obtained with another program. PEST's end product it a set of harmonic coefficients to be used in long-term prediction of the lunar orbit. PEST employs some novel techniques in its estimation process, notably a square batch estimator and linear variational equations in the orbital elements (both osculating and mean) for measurement sensitivities. The program's capabilities are described, and operating instructions and input/output examples are given. PEST utilizes MAESTRO routines for its trajectory propagation. PEST's program structure and subroutines which are not common to MAESTRO are described. Some of the theoretical background information for the estimation process, and a derivation of linear variational equations for the Method 7 elements are included.
Bjorkman, W. S.↗
Development of a position sensitive X-ray detector for use in a light weight X-ray diffractometer
The characteristics of a curved position sensitive X-ray detector are discussed. Emphasis is placed on the analysis of operation in a focusing diffraction geometry. Problems encountered in constructing the sensor are described. Construction drawings of the sensor components are provided.
Semmler, R. A.↗
Wind tunnel and flight performance of the YF-12 inlet system
The steady-state internal performance from 1/3-scale and full-scale wind tunnel models of the YF-12 inlet system is compared with results from flight tests. All systems were thoroughly instrumented for static and total pressure measurements. Results obtained included the inlet mass flows, surface pressure distribution, boundary layer profiles, and detailed total pressure measurements at the engine face. Inlet performance is compared at Mach numbers 2.1 and 2.8 and at several Reynolds numbers over a wide range of inlet operating conditions. Analysis generally shows good agreement in the results between the three systems when inlet conditions are closely matched.
Smeltzer, D. B.↗
Measurements of the 0.1-27 MeV cosmic gamma ray spectrum by Apollos 15 and 16
The spectrum of diffuse cosmic gamma rays over the 0.127 MeV range was measured by a 7 x 7 cm omnidirectional NaI counter on Apollo 15 and 16. Location of the spectrometer on a 7.6 m extensible boom, use of precision pulse-height analysis, and operation in several modes permitted data to be obtained from which spacecraft and other background contributions could be separated. Recent measurements verified the Apollo spectrum.
Peterson, L. E.↗
NASTRAN: User's Experiences
Papers given at the colloquium are presented. Topics discussed include NASTRAN status and plans, computer operations, thermal analysis, NASTRAN applications, vibrations, dynamics, and finite element analysis.
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A comprehensive experimental program for investigation of various Omega operational modes with selected data analysis results
The investigations considered are concerned with a better definition of the achievable accuracy and propagation characteristics of Omega and the provision of data which could be used for an analysis to study the potential application of Omega position determination to support other NASA projects. The data collection program is considered along with the experimental equipment employed. Attention is given to the design of the receiving station, aspects of data processing, position measurement errors, differential errors, problems of lane decision, and the definition of the update rate.
Lytle, C. D.↗