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Technical Paper
Thomas F. Urbanosky
Typical advantages, applications, and mathematics of flueric operational amplifiers are briefly discussed. In that cascaded proportional amplifiers (gain blocks) are the backbone of operational amplifier circuits, their performance is shown. Practical considerations of gain blocks are pointed out, such as signal-to-noise ratio, frequency response, saturation characteristics, repeatability, hysteresis, and so on. Gain block development breakthroughs achieved during the past two years make operational amplifiers highly practical for fluidic control system design. Examples of operational amplifier test performance are shown; the performance is in excellent agreement with the theory.
Technical Paper
W. R. Morgan, H. C. True, H. B. Starkey
The XV-5A lift fan airplane is an Army (TRECOM) sponsored V/STOL research program and is designed to demonstrate the performance of a V/STOL gas coupled, lift fan system and its compatibility with a high subsonic speed aircraft. This paper summarizes the aircraft and propulsion system design and manufacture. Performance characteristics and design features along with the status of the program are also presented.
Technical Paper
Paul Brock
There has been extensive work done to develop and to apply a number of War Gaming Simulation Techniques. Many informative and provocative documents have been published on the subject. In prior work at the RAND Corporation and at the Army Combat Development Experimentation Center, the author has studied and used varied war gaming techniques. From this advantageous view of the subject an attempt is made to codify war gaming techniques, as they seem to form an homogeneous subject area. This structuring allows for potentially more ways of utilizing an expanding existing methodology. Indications of richer and stronger techniques are developed in the report. It is hoped that the results discussed here can assist the staffs of those organizations who have the responsibility for generating war game simulations for analysis purposes.
Technical Paper
Chiong S. Tan, Byron Pritchard, Ron Plybon, Chuck Califf, Ray Holm, Sasikumar Muthusamy, Viilas Bokade, TS Niranjan, Balasubramaniam Mahadevan
This paper describes a physics-based icing tool for aircraft engines, which have small components compared to the wing geometry of an aircraft. The tool consists of an icing code, viscous CFD software and mesh generator to build ice shapes incrementally to form the final shape. This multi-layered process was developed to predict ice shapes in components with high-pressure gradient flows as found inside engine flow passages. Good agreement was found between experimental and predicted ice shapes for engine inlet guide vanes and different wing geometries.
Technical Paper
R. C. Williamson, C. M. Stanforth
The measurement of jet engine combustion temperature is accomplished principally by the use of either thermocouples or gas analysis. Although more tedious, gas analysis is required to measure the highest temperature levels such as in afterburners, while thermocouples are normally adequate to measure the exit temperatures from main combustors. The measurement techniques are presented and determination of the true temperature is described, along with the errors which are involved in each case. Advantages and limitations of the two methods are discussed, and criteria are presented to aid in the selection of the best method for a particular application.
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