SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Charts are presented for checking the stability of plane systems of rods, the use of the charts being illustrated by examples. It is also indicated how best to combine the individual members to form stable structures.
The present report contains a set of charts developed for computing the fixity effect on a compression member in a truss through its adjacent members, the amount of fixity being considered variable with the particular total truss load. The use of the charts is illustrated on two- and three-bay systems, as well as on a triangular truss.
During Space Shuttle operations, Mission Control personnel monitor numerous mission-critical systems such as electrical power; guidance, navigation, and control; and propulsion by means of paper strip chart recorders. For example, electrical power controllers monitor strip chart recorder pen traces to identify onboard electrical equipment activations and deactivations. Recent developments in pattern recognition technologies coupled with new capabilities that distribute real-time Shuttle telemetry data to engineering workstations make it possible to develop computer applications that perform some of the low-level monitoring now performed by controllers. The number of opportunities for such applications suggests a need to build a pattern recognition tool kit to reduce software development effort through software reuse. We are building pattern recognition applications while keeping such a tool kit in mind. We demonstrated the initial prototype application, which identifies electrical equipment activations, during three recent Shuttle flights. This prototype was developed to test the viability of the basic system architecture, to evaluate the performance of several pattern recognition techniques including those based on cross-correlation, neural networks, and statistical methods, to understand the interplay between an advanced automation application and human controllers to enhance utility, and to identify capabilities needed in a more general-purpose tool kit.
A compilation of charts of the induced velocities near a lifting rotor is presented. The charts cover uniform as well as various non-uniform distributions of disk loading and should be applicable to many aerodynamic interference problems involving rotors.
Charts for equilibrium flow properties of air in hypervelocity nozzles
Lunar charting program - progress report April 1964 - June 1964
Charts of isentropic exponent as function of enthalpy and speed for air, nitrogen, carbon dioxide, and mixtures of nitrogen and carbon dioxide in equilibrium
Automatic flow chart design using computer program written in Fortran
Charts of additive drag coefficient and mass flow ratio for inlets utilizing right circular cones at zero angle of attack
Automatic picture transmission system on Nimbus and earth synchronous satellites for transmission of weather charts
Local and average skin friction and heat transfer on flat plates in air - charts
Contains derivations, based on a simplified theory, of approximate relations for low-speed stability derivatives of swept wings. Method accounts for the effects and, in most cases, taper ratio. Charts, based on the derived relations, are presented for the stability derivatives of untapered swept wings. Calculated values of the derivatives are compared with experimental results.
Elastic design charts for thin plates with spanwise and chordwise variations in temperature
Synoptic charts of magnetic disturbance in arctic region
Charts for equilibrium flow properties of carbon dioxide in hypervelocity nozzles
Charts for solution of radial distribution flow equations used in axial flow compressor design
Charts for equilibrium thermodynamic properties of nitrogen-oxygen mixtures under extreme pressure and temperature ranges
Equilibrium and frozen flow property charts for carbon dioxide