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Aerodynamics of Rotating-Wing Aircraft With Blade-Pitch Control

Description: "In the present report, with the aid of the usual computation methods, a rotor is investigated the pitch of whose blades is capable of being controlled in such a manner that it varies linearly with the flapping angle. To test the effect of this linkage on the aircraft performance, the theory is applied to an illustrative example" (p. 1).
Date: February 1940
Creator: Pflüger, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Double-shell tank ultrasonic inspection plan. Revision 1

Description: The waste tank systems managed by the Tank Waste Remediation System Division of Westinghouse Hanford Company includes 28 large underground double-shell tanks (DST) used for storing hazardous radioactive waste. The ultrasonic (UT) inspection of these tanks is part of their required integrity assessment (WAC 1993) as described in the tank systems integrity assessment program plan (IAPP) (Pfluger 1994a) submitted to the Ecology Department of the State of Washington. Because these tanks hold radioa… more
Date: September 30, 1994
Creator: Pfluger, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Double-shell tank integrity assessments ultrasonic test equipment performance test

Description: A double-shell tank (DST) inspection (DSTI) system was performance tested over three months until August 1995 at Pittsburgh, Pennsylvania, completing a contract initiated in February 1993 to design, fabricate, and test an ultrasonic inspection system intended to provide ultrasonic test (UT) and visual data to determine the integrity of 28 DSTs at Hanford. The DSTs are approximately one-million-gallon underground radioactive-waste storage tanks. The test was performed in accordance with a proced… more
Date: September 26, 1996
Creator: Pfluger, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The resistance coefficient of commercial round wire grids

Description: From Summary: "The resistance coefficients of commercial types of round wire grids were examined for the purpose of obtaining the necessary data on supercharger test stands for throttling the inducted air to a pressure corresponding to a desired air density. The measurements of the coefficients ranged up to Reynolds numbers of 1000. In the arrangement of two grids in tandem, which was necessary in order to obtain high resistance coefficients with the solidity, that is, mesh density of grid, was… more
Date: January 1942
Creator: Eckert, B. & Pflüger, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Influence of the Diameter Ratio on the Characteristics Diagram of the Axial Compressor

Description: With the further development of axial blowers into highly loaded flow machines, the influence of the diameter ratio upon air output and efficiency gains in significance. Clarification of this matter is important for single-stage axial compressors, and is of still greater importance for multistage ones, and particularly for aircraft power plants. Tests with a single-stage axial blower gave a decrease in the attainable maximum pressure coefficient and optimum efficiency as the diameter ratio incr… more
Date: April 1948
Creator: Eckert, B.; Pflüger, F. & Weinig, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance testing of a system for remote ultrasonic examination of the Hanford double-shell waste storage tanks

Description: A mobile robotic inspection system is being developed for remote ultrasonic examination of the double wall waste storage tanks at Hanford. Performance testing of the system includes demonstrating robot mobility within the tank annulus, evaluating the accuracy of the vision based navigation process, and verifying ultrasonic and video system performance. This paper briefly describes the system and presents a summary of the plan for performance testing of the ultrasonic testing system. Performance… more
Date: February 1, 1995
Creator: Pfluger, D. C.; Somers, T. & Berger, A. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An Automated Procedure for Covariation-Based Detection of RNA Structure

Description: This paper summarizes our investigations into the computational detection of secondary and tertiary structure of ribosomal RNA. We have developed a new automated procedure that not only identifies potential bondings of secondary and tertiary structure, but also provides the covariation evidence that supports the proposed bondings, and any counter-evidence that can be detected in the known sequences. A small number of previously unknown bondings have been detected in individual RNA molecules (16… more
Date: December 1989
Creator: Winker, S.; Overbeek, R.; Woese, Carl R.; Olsen, G. J. & Pfluger, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An automated procedure for covariation-based detection of RNA structure

Description: This paper summarizes our investigations into the computational detection of secondary and tertiary structure of ribosomal RNA. We have developed a new automated procedure that not only identifies potential bondings of secondary and tertiary structure, but also provides the covariation evidence that supports the proposed bondings, and any counter-evidence that can be detected in the known sequences. A small number of previously unknown bondings have been detected in individual RNA molecules (16… more
Date: December 1, 1989
Creator: Winker, S.; Overbeek, R.; Woese, C. R.; Olsen, G. J. & Pfluger, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The vacuum chambers for the VUV SASE FEL at the TESLA test facility (TFF FEL) at DESY.

Description: A vacuum chamber for the VW SASE FEL undulatory at the TESLA Test Facility (TTF) was designed, a prototype was built and tested, and seven complete chambers were manufactured. The chambers use the aluminum extrusion technology developed for the insertion device vacuum chambers of the Advanced Photon Source. Each chamber is 4.5 m long with a beam aperture of 9.5 mm and an external thickness of 11.5 mm. Three of the chambers include ports for integral beam position monitors (10 horizontal and ver… more
Date: April 20, 1999
Creator: Den Hartog, P. K.; Erdmann, M.; Hahn, U.; Pfluger, J.; Ruter, M.; Trakhtenberg, E. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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