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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics : effect of compressor interstage air bleed

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics : effect of compressor interstage air bleed

Date: July 3, 1953
Creator: Rebeske, John J , Jr & Dugan, James F , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics I : effect of air bleed at compressor outlet

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics I : effect of air bleed at compressor outlet

Date: March 10, 1953
Creator: Rebeske, John J , Jr & Rohlik, Harold E
Description: An analytical investigation was made to determine from component performance characteristics the effect of air bleed at the compressor outlet on the acceleration characteristics of a typical high-pressure-ratio single-spool turbojet engine. Consideration of several operating lines on the compressor performance map with two turbine-inlet temperatures showed that for a minimum acceleration time the turbine-inlet temperature should be the maximum allowable, and the operating line on the compressor map should be as close to the surge region as possible throughout the speed range. Operation along such a line would require a continuously varying bleed area. A relatively simple two-step area bleed gives only a small increase in acceleration time over a corresponding variable-area bleed. For the modes of operation considered, over 84 percent of the total acceleration time was required to accelerate through the low-speed range ; therefore, better low-speed compressor performance (higher pressure ratios and efficiencies) would give a significant reduction in acceleration time.
Contributing Partner: UNT Libraries Government Documents Department
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics III : effect of turbine stator adjustment

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics III : effect of turbine stator adjustment

Date: August 2, 1954
Creator: Rohlik, Harold E & Rebeske, John J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

Date: May 12, 1958
Creator: Gerus, Theodore F; Powers, Albert G & Heppler, Herbert J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

Date: May 12, 1958
Creator: Gerus, T. F.; Heppler, H. J. & Powers, A. G.
Description: Accelerating-limiting controls for turbojet engines.
Contributing Partner: UNT Libraries Government Documents Department
Acceleration, stress, and deflection measurements on the XB-15 bomber in gusty air

Acceleration, stress, and deflection measurements on the XB-15 bomber in gusty air

Date: June 1939
Creator: Pearson, Henry A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations and bottom pressures measured on a B-24D airplane in a ditching test

Accelerations and bottom pressures measured on a B-24D airplane in a ditching test

Date: November 1944
Creator: Steiner, Margaret F.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations and passenger harness loads measured in full-scale light-airplane crashes

Accelerations and passenger harness loads measured in full-scale light-airplane crashes

Date: August 1953
Creator: Eiband, A Martin; Simpkinson, Scott H & Black, Dugald O
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in fighter-airplane crashes

Accelerations in fighter-airplane crashes

Date: November 4, 1957
Creator: Acker, Loren W; Black, Duglad O & Moser, Jacob C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in flight

Accelerations in flight

Date: 1925
Creator: Doolittle, J H
Description: This work on accelerometry was done at McCook Field for the purpose of continuing the work done by other investigators and obtaining the accelerations which occur when a high-speed pursuit airplane is subjected to the more common maneuvers. The accelerations obtained in suddenly pulling out of a dive with well-balanced elevators are shown to be within 3 or 4 per cent of the theoretically possible accelerations. The maximum acceleration which a pilot can withstand depends upon the length of time the acceleration is continued. It is shown that he experiences no difficulty under the instantaneous accelerations as high as 7.8 G., but when under accelerations in excess of 4.5 G., continued for several seconds, he quickly loses his faculties.
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in flight

Accelerations in flight

Date: 1921
Creator: Norton, F H & Allen, E T
Description: This report deals with the accelerations obtained in flight on various airplanes at Langley Field for the purpose of obtaining the magnitude of the load factors in flight and to procure information on the behavior of an airplane in various maneuvers. The instrument used in these tests was a recording accelerometer of a new type designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists of a flat steel spring supported rigidly at one end so that the free end may be deflected by its own weight from its neutral position by any acceleration acting at right angles to the plane of the spring. This deflection is measured by a very light tilting mirror caused to rotate by the deflection of the spring, which reflected the beam of light onto a moving film. The motion of the spring is damped by a thin aluminum vane which rotates with the spring between the poles of an electric magnet. Records were taken on landings and takeoffs, in loops, spins, spirals, and rolls.
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in Landing with a Tricycle-Type Landing Gear

Accelerations in Landing with a Tricycle-Type Landing Gear

Date: February 1937
Creator: Jones, Robert T.
Description: In connection with the application of stable tricycle-type landing gears to transport airplanes, the question arises as to whether certain passengers may not experience relatively great accelerations in an emergency landing. Since the main landing wheels are behind the center of gravity in this type of gear, a hard-braked landing will cause immediate nosing down of the airplane and, when this motion is stopped due to the front wheel striking the ground, there will be some tendency for the rearmost passengers to be thrown out of their seats, The provided rough calculations are designed to show the magnitudes of the various reactions experienced in a severe landing under these circumstances.
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in transport-airplane crashes

Accelerations in transport-airplane crashes

Date: February 1958
Creator: Preston, G Merritt & Pesman, Gerard J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations measured at center of gravity and along span of the wing of a B-24D airplane in landing impacts

Accelerations measured at center of gravity and along span of the wing of a B-24D airplane in landing impacts

Date: August 1944
Creator: Westfall, John R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerometer design

Accelerometer design

Date: 1921?~
Creator: Norton, F H & Warner, Edward P
Description: In connection with the development of an accelerometer for measuring the loads on airplanes in free flight a study of the theory of such instruments has been made, and the results of this study are summarized in this report. A portion of the analysis deals particularly with the sources of error and with the limitations placed on the location of the instrument in the airplane. The discussion of the dynamics of the accelerometer includes a study of its theoretical motions and of the way in which they are affected by the natural period of vibration and by the damping, together with a report of some experiments on the effect of forced vibrations on the record.
Contributing Partner: UNT Libraries Government Documents Department
Accepted Limit Values of Air Pollutants

Accepted Limit Values of Air Pollutants

Date: May 1954
Creator: Barkley, J. F.
Description: Report issued by the U.S. Bureau of Mines discussing, as stated in the introduction, the "accepted maximum permissible concentrations of air pollutants from the standpoints of health, damage to vegetation, damage to property, and requirements of industrial processes" (p. 1). This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Accident Experience and Cost of Accidents in Washington Coal Mines

Accident Experience and Cost of Accidents in Washington Coal Mines

Date: November 1931
Creator: Ash, S. H.
Description: Report containing tables detailing cost of mining accidents in Washington state in comparison with other states.
Contributing Partner: UNT Libraries Government Documents Department
Accident Experience: Iron-Ore Mines, Lake Superior District, 1940-43

Accident Experience: Iron-Ore Mines, Lake Superior District, 1940-43

Date: May 1945
Creator: Cash, Frank E. & Larsen, Reuben D.
Description: Report issued by the U.S. Bureau of Mines discussing the iron-ore mining accident experience in the Lake Superior District. Frequency and severity rates of accidents between 1940 and 1943 are presented. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Accident-Severity Rates For Certain Metal Mines

Accident-Severity Rates For Certain Metal Mines

Date: September 1926
Creator: Adams, William Waugh
Description: Report issued by the U.S. Bureau of Mines on the severity of accidents in the metal-mine industry. 34 metal-mines documented the number and severity of all accidents over the course if one calendar year. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Accidental Radiation Excursion at the Y-12 Plant, June 16, 1958: Final Report

Accidental Radiation Excursion at the Y-12 Plant, June 16, 1958: Final Report

Date: September 12, 1958
Creator: Patton, F. S.; Bailey, J. C.; Callihan, A. D.; Googin, J. M.; Jasny, G. R.; McAlduff, H. J. et al.
Description: This report describes the circumstances leading to the accident, attempts to reconstruct the nuclear reactivity conditions, and reviews the dosimetric means and results which were used to help determine the exposure of affected employees.
Contributing Partner: UNT Libraries Government Documents Department
Accidents from explosives at metal and nonmetallic mines

Accidents from explosives at metal and nonmetallic mines

Date: 1957
Creator: Cash, Frank E.
Description: Circular produced by the U.S. Bureau of Mines to promote safety through a series of reports on accident prevention in mines. According the the scope statement, "This is the fourth section of the revised series of circulars that cover various phases of accident prevention in metal and nonmetallic mines; it give information on accidents and injuries from storing, handling, and using explosive in metal and nonmetallic mines and discusses the precautions by which they can be prevented" (p. 2).
Contributing Partner: UNT Libraries Government Documents Department
An Account of the Taxonomy of North American Wolves From Morphological and Genetic Analyses

An Account of the Taxonomy of North American Wolves From Morphological and Genetic Analyses

Date: October 2012
Creator: Chambers, Steven M.; Fain, Steven R.; Fazio, Bud & Amaral, Michael
Description: Taxonomy, genetics, morphometrics of North American wolves.
Contributing Partner: UNT Libraries Government Documents Department
Accounting System and Office-Management Procedure for Medium-Size Metal Mines

Accounting System and Office-Management Procedure for Medium-Size Metal Mines

Date: 1934
Creator: Keller, Albert E.
Description: Report discussing an accounting system and management of office procedures design for medium-size metal mines, offered by the United States Bureau of Mines, to be more efficient in the mining industry.
Contributing Partner: UNT Libraries Government Documents Department
Accuracy of airspeed measurements and flight calibration procedures

Accuracy of airspeed measurements and flight calibration procedures

Date: 1948
Creator: Huston, Wilber B
Description: The sources of error that may enter into the measurement of airspeed by pitot-static methods are reviewed in detail together with methods of flight calibration of airspeed installations. Special attention is given to the problem of accurate measurements of airspeed under conditions of high speed and maneuverability required of military airplanes. (author).
Contributing Partner: UNT Libraries Government Documents Department