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3,503 Matching Results
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Manual of Fire-Loss Prevention
Principles of fire-resistance classifications of building types and materials, general methods for controlling the spread of fire, and general fire-prevention measures.
Date:
November 5, 1934
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Focke helicopter
This report presents some of the problems concerning tests of helicopters, such as forced landings, controllability and stability, general safety, piloting maneuvers, performance, servicing, and the production of lift of a propeller. Test flights are described including a 67.67 mph flight by Hanna Reitsch.
Date:
April 1938
Creator:
Focke, H.
Object Type:
Report
System:
The UNT Digital Library
Automatic Stabilization
This report concerns the study of automatic stabilizers and extends it to include the control of the three-control system of the airplane instead of just altitude control. Some of the topics discussed include lateral disturbed motion, static stability, the mathematical theory of lateral motion, and large angles of incidence. Various mechanisms and stabilizers are also discussed.
Date:
August 1936
Creator:
Haus
Object Type:
Report
System:
The UNT Digital Library
The sonic altimeter for aircraft
Discussed here are results already achieved with sonic altimeters in light of the theoretical possibilities of such instruments. From the information gained in this investigation, a procedure is outlined to determine whether or not a further development program is justified by the value of the sonic altimeter as an aircraft instrument. The information available in the literature is reviewed and condensed into a summary of sonic altimeter developments. Various methods of receiving the echo and timing the interval between the signal and the echo are considered. A theoretical discussion is given of sonic altimeter errors due to uncertainties in timing, variations in sound velocity, aircraft speed, location of the sending and receiving units, and inclinations of the flight path with respect to the ground surface. Plots are included which summarize the results in each case. An analysis is given of the effect of an inclined flight path on the frequency of the echo. A brief study of the acoustical phases of the sonic altimeter problem is carried through. The results of this analysis are used to predict approximately the maximum operating altitudes of a reasonably designed sonic altimeter under very good and very bad conditions. A final comparison is made …
Date:
August 1937
Creator:
Draper, C. S.
Object Type:
Report
System:
The UNT Digital Library
Carbon-monoxide indicators for aircraft
Several improvements that have been made on commercially available carbon-monoxide indicators to make them more suitable for aircraft use are described. These improvements include an automatic flow regulator, which permits the use of a simplified instrument on aircraft where a source of suction is available, and a more reliable alarm attachment. A field method for testing instruments on standard samples of carbon monoxide is described. Performance data and instructions in operation and maintenance are given.
Date:
July 1936
Creator:
Womack, S. H. J. & Peterson, J. B.
Object Type:
Report
System:
The UNT Digital Library
Garage Building, Albany, Texas: Plans and Diagrams
Architectural plan for a school garage and manual training building in the Albany Independent School District. It includes detailed foundation and floor plans, door schedule, projected steel sash schedule, cross section thru foundation at A-A, and other diagrams.
Date:
1937
Creator:
David S. Castle Co.
Object Type:
Technical Drawing
System:
The Portal to Texas History
Gyroscopic Instruments for Instrument Flying
The gyroscopic instruments commonly used in instrument flying in the United States are the turn indicator, the directional gyro, the gyromagnetic compass, the gyroscopic horizon, and the automatic pilot. These instruments are described. Performance data and the method of testing in the laboratory are given for the turn indicator, the directional gyro, and the gyroscopic horizon. Apparatus for driving the instruments is discussed.
Date:
September 1938
Creator:
Brombacher, W. G. & Trent, W. C.
Object Type:
Report
System:
The UNT Digital Library
Present Status of Aircraft Instruments
This report gives a brief description of the present state of development and of the performance characteristics of instruments included in the following group: speed instruments, altitude instruments, navigation instruments, power-plant instruments, oxygen instruments, instruments for aerial photography, fog-flying instruments, general problems, summary of instrument and research problems. The items considered under performance include sensitivity, scale errors, effects of temperature and pressure, effects of acceleration and vibration, time lag, damping, leaks, elastic defects, and friction.
Date:
October 9, 1930
Creator:
Subcommittee on Instruments
Object Type:
Report
System:
The UNT Digital Library
Garage Building, Albany, Texas: Roof and Elevation Plan
Roof and elevation plan for a school garage and manual training building in the Albany Independent School District. It includes a roof plan as well as the north and street elevation.
Date:
1937
Creator:
David S. Castle Co.
Object Type:
Technical Drawing
System:
The Portal to Texas History
Aircraft Woods: Their Properties, Selection, and Characteristics
From Summary: "This report presents, further, information on the properties of various other native species of wood compared with spruce, and discusses the characteristics of a considerable number of them from the standpoint of their possible application in aircraft manufacture to supplement the woods that are now most commonly used."
Date:
January 1, 1930
Creator:
Markwardt, L. J.
Object Type:
Report
System:
The UNT Digital Library
Mechanical Equipment Used in the Drilling and Production of Oil and Gas Wells in the Oklahoma City Field
Report issued by the Bureau of Mines discussing the mechanical equipment used in oil and gas wells of the Oklahoma City field. As stated in the introduction, "this paper presents the results of a study devoted chiefly to new equipment that has been developed to meet the requirements of drilling and producing operations in the Oklahoma City field and that has been accepted by drilling contractors and operators" (p. 1). This report includes tables, illustrations, and photographs.
Date:
1934
Creator:
Wade, Gustav, 1885-
Object Type:
Report
System:
The UNT Digital Library
Garage Building, Albany, Texas: Floor Plans, Elevations, and Diagrams
Floor/elevation plan for a school garage and manual training building in the Albany Independent School District. It includes detailed floor plans of the first and second floors, front and west elevations, typical wall section A, and full size casting and base.
Date:
1937
Creator:
David S. Castle Co.
Object Type:
Technical Drawing
System:
The Portal to Texas History
Hydrogen as an auxiliary fuel in compression-ignition engines
From Summary: "An investigation was made to determine whether a sufficient amount of hydrogen could be efficiently burned in a compression-ignition engine to compensate for the increase of lift of an airship due to the consumption of the fuel oil. The performance of a single-cylinder four-stroke-cycle compression-ignition engine operating on fuel oil alone was compared with its performance when various quantities of hydrogen were inducted with the inlet air. Engine-performance data, indicator cards, and exhaust-gas samples were obtained for each change in engine-operating conditions."
Date:
April 15, 1935
Creator:
Gerrish, Harold C. & Foster, Hampton H.
Object Type:
Report
System:
The UNT Digital Library
Span-load distribution as a factor in stability in roll
"This report gives the results of pressure-distribution tests made to study the effects on lateral stability of changing the span-load distribution on a rectangular monoplane wing model of fairly thick section. Three methods of changing the distribution were employed: variation in profile along the span to a thin symmetrical section at the tip, twist from +5 degrees to -15 degrees at the tip, and sweepback from +20 degrees to -20 degrees. The tests were conducted in a 5-foot closed-throat atmospheric wind tunnel" (p. 567).
Date:
March 4, 1931
Creator:
Knight, Montgomery & Noyes, Richard W.
Object Type:
Report
System:
The UNT Digital Library
Attaining a Steady Air Stream in Wind Tunnels
"Many experimental arrangements of varying kind involve the problems of assuring a large, steady air stream both as to volume and to time. For this reason a separate discussion of the methods by which this is achieved should prove of particular interest. Motors and blades receive special attention and a review of existent wind tunnels is also provided" (p. 1).
Date:
October 1933
Creator:
Prandtl, L.
Object Type:
Report
System:
The UNT Digital Library
Longitudinal Stability in Relation to the Use of an Automatic Pilot
"The effect of restraint in pitching introduced by an automatic pilot upon the longitudinal stability of an airplane has been studied. Customary simplifying assumptions have been made in setting down the equations of motion, and the results of computations based on the simplified equations are presented to show the effect of an automatic pilot installed in an airplane of known dimensions and characteristics. The equations developed have been applied by making calculations for a Clark biplane and a Fairchild 22 monoplane" (p. 1).
Date:
September 1938
Creator:
Klemin, Alexander; Pepper, Perry A. & Wittner, Howard A.
Object Type:
Report
System:
The UNT Digital Library
Strength of Welded Joints in Tubular Members for Aircraft
"The object of this investigation is to make available to the aircraft industry authoritative information on the strength, weight, and cost of a number of types of welded joints. This information will, also, assist the aeronautics branch in its work of licensing planes by providing data from which the strength of a given joint may be estimated. As very little material on the strength of aircraft welds has been published, it is believed that such tests made by a disinterested governmental laboratory should be of considerable value to the aircraft industry" (p. 323).
Date:
February 6, 1930
Creator:
Whittemore, H. L. & Brueggeman, W. C.
Object Type:
Report
System:
The UNT Digital Library
Modern Manufacturing Equipment of the Ernst Heinkel Airplane Works
This report contains a description of new methods of fabrication, new equipment, and special tools, with a view to supplying data for design from economical points of view, as well as to stimulate the interest of other factories in improved shop methods. Some of the topics include the method and tools for changing the sectional shape of light-alloy and steel tubes, skin riveting, automatic strip insertion for drawing-sheet sections, silent beating tools, beam strap milling machines, drilling and countersinking tools for mounting standard parts, and tools for creasing thin sheets.
Date:
November 1938
Creator:
Thormann, A. & Jockisch, H.
Object Type:
Report
System:
The UNT Digital Library
Analysis and Model Tests of Autogiro Jump Take-Off
From Introduction: "The possibilities of the jump take-off have been established by some full-scale experiments. It is the purpose of this paper to study the factors that govern the jump take-off in its simplest form and to present the results of model tests in which the effect of differences in the rotor parameters was determined."
Date:
October 1936
Creator:
Wheatley, John B. & Bioletti, Carlton
Object Type:
Report
System:
The UNT Digital Library
Alternating-current equipment for the measurement of fluctuations of air speed in turbulent flow
From Summary: "Recent electrical and mechanical improvements have been made in the equipment developed at the National Bureau of Standards for measurement of fluctuations of air speed in turbulent flow. Data useful in the design of similar equipment are presented. The design of rectified alternating-current power supplies for such apparatus is treated briefly, and the effect of the power supplies on the performance of the equipment is discussed."
Date:
March 1937
Creator:
Mock, W. C., Jr.
Object Type:
Report
System:
The UNT Digital Library
Pressure distribution over a rectangular airfoil with a partial-span split flap
This report presents the results of pressure-distribution tests of a Clark y wing model with a partial-span split flap made to determine the distribution of air loads over both the wing and the flap. The model was used in conjunction with a reflection plane in the NACA 7 by 10 foot wind tunnel. The 20-percent-chord split flap extended over the inboard 60 percent of the semispan. The tests were made at various flap deflections up to 45 degrees and covered a range of angles of attack from zero lift to approximately maximum lift for each deflection.
Date:
April 28, 1937
Creator:
Wenzinger, Carl J. & Harris, Thomas A.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Water Vapor on Flame Velocity in Equivalent Carbon Monoxide and Oxygen Mixtures
This report presents the results of an investigation to study the effect of water vapor upon the spatial speed of flame in equivalent mixtures of carbon monoxide and oxygen at various total pressures from 100 to 780 mm.hg. These results show that, within this pressure range, an increase in flame speed is produced by increasing the mole fraction of water vapor at least as far as saturation at 25 degrees c., and that the rate of this increase is greater the higher the pressure. It is evident that water vapor plays an important part in the explosive oxidation of carbon monoxide; the need for further experimental evidence as to the nature of its action is indicated.
Date:
January 10, 1935
Creator:
Fiock, Ernest F. & King, H. Kendall
Object Type:
Report
System:
The UNT Digital Library
Results of Extended Tests of the Focke-Wulf F 19a "Ente," a Tail-First Airplane
These investigations consisted chiefly of measurements of the take-off distance under various starting conditions and with the c.g. in different positions; of the climbing speed as a function of the impact pressure and location of the c.g.; of the longitudinal stability and fore-and-aft controllability and of the determination of the elevator forces and characteristics of the elevator control.
Date:
September 1933
Creator:
Hübner, Walter
Object Type:
Report
System:
The UNT Digital Library
Development of the Rules Governing the Strength of Airplanes Part 1: German Loading Conditions Up to 1926
Load factors and loading conditions are presented for German aircraft. Loading conditions under various stress factors are presented along with a breakdown of individual aircraft components such as landing gear, wings, etc.
Date:
July 1933
Creator:
Küssner, H. G. & Thalau, Karl
Object Type:
Report
System:
The UNT Digital Library