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A simplified method for evaluating jet-propulsion-system components in terms of airplane performance

Description: Report presenting a method to provide a simple means of comparing engine components on the basis of either range or the margin of thrust over drag. The equations include the variation in thrust coefficient and specific impulse and the change in engine weight and drag. Four general cases are considered: fixed-size airplanes with constant gross weight, fixed-size airplanes with variable gross weight, variable-size airplanes with constant payload weight, and variable-size airplanes with constant ratio of payload to gross weight.
Date: December 6, 1956
Creator: Weber, Richard J. & Luidens, Roger W.
Partner: UNT Libraries Government Documents Department

Dual-band Microwave Device Design

Description: This thesis presents a brief introduction to microwave components and technology. It also presents two novel dual-band designs, their analysis, topology, simulation and fabrication. In chapter 2, a novel dual-band bandpass filter using asymmetric stub-loaded stepped-impedance resonators (SLSIRs) operating at 1 and 2.6 GHz is shown. This type of design applies suitable arrangements to improve the filter’s performance. Then, in chapter 3, a novel dual-band balun (transforms unbalanced input signals to balanced output signals or vice versa) operating at 1.1 and 2 GHz with flexible frequency ratios is presented, which has more advantages in microwave applications. Then, conclusion and future works are discussed in chapter 4.
Date: May 2014
Creator: Li Shen, Andres E.
Partner: UNT Libraries

Palacio de los Condes de Casa Bayona

Description: The view is of the facade of the two-story palace. Also seen is the balcony running the width of the building. Spaced decorative finials on the rooftop are shown. The windows are topped with gentle curves and the sashes are painted blue. This palace is the south flank of the plaza of the Cathedral of Havana.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: 1750~
Location Info:
Partner: UNT College of Visual Arts + Design

The stress distribution in shell bodies and wings as an equilibrium problem

Description: This report treats the stress distribution in shell-shaped airplane components (fuselage, wings) as an equilibrium problem; it includes both cylindrical and non-cylindrical shells. In particular, it treats the stress distribution at the point of stress application and at cut-out points.
Date: February 1937
Creator: Wagner, H.
Partner: UNT Libraries Government Documents Department

The Effect of the Sperry Messenger Fuselage on the Air Flow at the Propeller Plane

Description: "In order to study the effect of the fuselage, landing gear, and engine on the air flow through the propeller, a survey was made in the plane of the Sperry Messenger propeller with the propeller removed. The tests were made in the 20-foot air stream of the propeller research tunnel of the National Advisory Committee for Aeronautics at Langley Field, Virginia. The variation of the velocity with distance from the center in the propeller plane was found to be appreciable and well worth consideration in the design of propellers" (p. 1).
Date: January 1928
Creator: Weick, Fred E.
Partner: UNT Libraries Government Documents Department

Preparation of system design descriptions

Description: A standard is presented which prescribes the purpose, scope, organization, and content of system design descriptions (SSD's), in order to promulgate a unified approach to their preparation and use by a project as the principal means to establish, describe, and control the individual system designs from conception and throughout the lifetime of the system. SDD's are comprehensive technical documents that specifically and completely define the design, including operation, maintenance, and reliability requirements, of individual systems which comprise a nuclear power plant or test facility. SDD's are prepared and maintained current by the responsible system designer and are the principal means of system design definition and control common to the designer and the other participating organizations responsible for the project. (auth)
Date: December 1, 1975
Partner: UNT Libraries Government Documents Department