Collection
Texas Attorney General Opinions
646
Technical Report Archive and Image Library
600
National Advisory Committee for Aeronautics Collection
425
Office of Scientific & Technical Information Technical Reports
146
TRAIL Microcard Collection
122
World War Two Collection
98
World War Two Newsmaps
53
USGS Topographic Map Collection
49
World War Poster Collection
29
Government Documents A to Z Digitization Project
28
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Serial/Series Title
NACA Wartime Reports
335
NACA Advanced Restricted Reports
144
Atomic Energy Commission Reports
131
NACA Memorandum Reports
117
NACA Advanced Confidential Reports
55
Newsmap
53
NACA Technical Notes
36
NACA Technical Reports
32
CC (Series) (Chicago, Illinois)
30
Metallurgical Laboratory Reports
29
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1,585 Matching Results
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The Knock-Limited Performance of S Reference Fuel Plus 2 Milliliters of Triethylthallium Per Gallon
Report discusses the results of testing of thallium as an antiknock agent in an internal-combustion engine. From Introduction: "On a weight basis, the thallium vapors were found to have several times the antiknock value of tetraethyl lead, which was added to the fuel. The amount of thallium vapor necessary to raise the antiknock properties of a gasoline up to exact equivalence with a benzol-gasoline mixture was determined in these engine tests."
Date:
November 1945
Creator:
Meyer, Carl L.
Object Type:
Report
System:
The UNT Digital Library
Correlation of exhaust-valve temperatures with engine operating conditions and valve design
Report presenting a theory regarding engine-cooling variables from a previous report, which was used as a basis for the development of a semi-empirical equation to correlate exhaust-valve temperature with engine conditions. Results regarding the determination of constants, influences of operating variables on mean effective gas temperatures, thermal-resistance factor, and accuracy of correlating equation are provided.
Date:
October 1945
Creator:
Zipkin, M. A. & Sanders, J. C.
Object Type:
Report
System:
The UNT Digital Library
Fuel-Evaporation Loss as Determined by the Change in the Specific Gravity of the Fuel in an Aircraft Fuel Tank
Report discusses the results of an investigation to determine the feasibility of using the change in the specific gravity of fuels in aircraft fuel tanks to measure fuel-vaporization loss. Six fuels were tested via fuel-distillation tests and simulated-flight tests. An equation based on the specific gravity of the fuel is also described.
Date:
May 1945
Creator:
Stone, Charles S. & Kramer, Walter E.
Object Type:
Report
System:
The UNT Digital Library
Ultraviolet spectrochemical analysis for aromatics in aircraft fuels
Report presenting tests to verify and extend ultraviolet spectroscopic techniques for applications to the analysis of aviation fuels for their aromatic constituents. Results regarding photographic absorption spectra, spectrophotometric absorption spectra, and spectrophotometric analyses are provided.
Date:
March 1945
Creator:
Cleaves, Alden P.
Object Type:
Report
System:
The UNT Digital Library
Visual Studies of Cylinder Lubrication [Part] 1: The Lubrication of the Piston Skirt
Report describes the lubrication characteristics of an aircraft-type piston as visually studied in a V-type engine with a glass cylinder. Information about the movement of the piston, the piston rings, and the oil-control rings and their effect on lubrication is included.
Date:
September 1945
Creator:
Shaw, Milton C. & Nussdorfer, Theodore
Object Type:
Report
System:
The UNT Digital Library
Critical combinations of shear and transverse direct stress for an infinitely long flat plate with edges elastically restrained against rotation
Report presenting an exact solution and a closely concurring approximate energy solution for the buckling of an infinitely long flat plate under combined shear and transverse direct stress with edges elastically restrained against rotation. An appreciable fraction of the critical stress in pure shear may be applied to the plate without any reduction in the transverse compressive stress necessary to produce buckling.
Date:
January 1945
Creator:
Batdorf, S. B. & Houbolt, John C.
Object Type:
Report
System:
The UNT Digital Library
The development and application of high-critical-speed nose inlets
From Summary: "An analysis of the nose-inlet shapes developed in previous investigations to represent the optimum from the standpoint of critical speed has shown that marked similarity exists between the nondimensional profiles of inlets which have widely different proportions and critical speeds. With the nondimensional similarity of such profiles established, the large differences in the critical speeds of these nose inlets must be a function of their proportions. An investigation was undertaken in the Langley 8-foot high-speed tunnel to establish the effects of nose-inlet proportions on critical Mach number and to develop a rational method for the design of high-critical-speed nose inlets to meet desired requirements."
Date:
July 1945
Creator:
Baals, Donald D.; Smith, Norman F. & Wright, John B.
Object Type:
Report
System:
The UNT Digital Library
An Experimental Investigation of Rectangular Exhaust-Gas Ejectors Applicable for Engine Cooling
Report presenting an experimental investigation of rectangular exhaust-gas ejector pump to provide data that would serve as a guide to the design of ejector applications for aircraft engines with marginal cooling. With a decrease in the quantity of air pumped and an increase in the length of an ejector, the ejector pressure rise increases to optimum values. Results regarding straight ejectors, diffuser ejectors, curved ejectors, ejector aspect ratio, divided ejectors, multistage ejectors, and nozzle-exit effects are provided.
Date:
May 1945
Creator:
Manganiello, Eugene J. & Bogatsky, Donald
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of the Effects of Spoilers on the Characteristics of a Low-Drag Airfoil Equipped With a 0.25-Chord Slotted Flap
Report discussing the effects of circular-arc spoilers on the section characteristics of an NACA 66,2-216 airfoil with a 0.25-chord slotted flap. Spoilers were tested on the upper surface of the airfoil, on the lower surface, and on both simultaneously. Only the simultaneous placement of spoilers was found to provide satisfactory results as a lateral control device.
Date:
July 23, 1945
Creator:
Holtzclaw, Ralph W.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 5: Effect of Thermal System on Airplane Cruise Performance
Report presenting flight tests conducted to evaluate the effect of a thermal ice prevention system on the aerodynamic performance of a C-46 cargo airplane. The installation of the thermal ice-prevention system was found to reduce the indicated airspeed by about 6 miles per hour. Results regarding the overall performance change resulting from the installation of the thermal system, reduction of power attributed to heat-exchanger exhaust-gas back pressure, reduction of power attributed to the internal and external drag of the thermal system, and the additional airplane gross weight attributed to the thermal system are provided.
Date:
May 1945
Creator:
Selna, James
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 3: Description of Thermal Ice-Prevention Equipment for Wings, Empennage, and Windshield
Report presenting an investigation of a thermal ice-prevention system for a Curtiss-Wright C-46 airplane, including the equipment for the wings, empennage, and windshield. The report is the third in a series and focuses on the revisions to the components for thermal ice prevention, the temperature- and pressure-measurement equipment installed in the airplane to determine the performance of the system, and the results of static-load structural tests of a specimen of the wing outer-panel leading edge.
Date:
February 1945
Creator:
Jones, Alun R. & Spies, Ray J., Jr.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 4: Results of Flight Tests in Dry-Air and Natural-Icing Conditions
Report presenting an investigation of a thermal ice-prevention system for a C-46 cargo airplane, which involved flight tests in dry-air and natural-icing conditions at two different laboratories. The purpose of the investigation was to determine the effectiveness of the C-46 airplane ice-prevention system and to continue the develop of thermal ice-prevention equipment. Results regarding the wing outer panel, wing tips, wing center panel, horizontal stabilizers, vertical fin, windshields, ice-removal tests, unprotected surfaces, and heat exchangers are provided.
Date:
February 1945
Creator:
Selna, James; Neel, Carr B., Jr. & Zeiller, E. Lewis
Object Type:
Report
System:
The UNT Digital Library
The Use of Geared Spring Tabs for Elevator Control
Report discussing the use of two types of geared spring tabs for elevator control: ordinary (or ungeared) spring tabs and geared spring tabs. Their use in airplanes of various sizes and in comparison to conventional control systems is described.
Date:
February 1945
Creator:
Phillips, William H.
Object Type:
Report
System:
The UNT Digital Library
A general representation for axial-flow fans and turbines
From Summary: "A general representation of fan and turbine arrangements on a single classification chart is presented which is made possible by a particular definition of the stage of an axial-flow fan or turbine. Several unconventional fan and turbine arrangements are indicated and the applications of these arrangements are discussed."
Date:
June 1945
Creator:
Perl, W. & Tucker, M.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 6: Dry-Air Performance of Thermal System at Several Twin- and Single-Engine Operating Conditions at Various Altitudes
Report presenting flight tests to establish the dry-air-performance characteristics of a thermal ice-prevention system at various operating conditions and altitudes. Results regarding twin-engine tests and single-engine tests of characteristics such as skin temperatures and location of heating are provided.
Date:
May 1945
Creator:
Selna, James & Kees, Harold L.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 2: The Design, Construction, and Preliminary Tests of the Exhaust-Air Heat Exchanger
Report presenting an investigation of an exhaust-air heat exchanger, which has been designed, constructed, and flight-tested for a C-46 cargo airplane. The primary purpose of the investigation was to provide the C-46 airplane with a satisfactory source of heated air and to continue the development of the heat exchanger as a part of thermal ice-prevention equipment. Results indicated that the required thermal output and desired air-temperature rise have been achieved and that the exchanger is suitable for use in the C-46 airplane.
Date:
February 1945
Creator:
Jackson, Richard
Object Type:
Report
System:
The UNT Digital Library
Calculations of Economy of 18-Cylinder Radial Aircraft Engine With Exhaust-Gas Turbine Geared to the Crankshaft at Cruising Speed
Report presenting calculations based on dynamometer test-stand data on an 18-cylinder radial engine made to determine the improvement in fuel consumption that can be obtained by gearing an exhaust-gas turbine to the engine crankshaft in order to increase the engine shaft work.
Date:
December 1945
Creator:
Hannum, Richard W.
Object Type:
Report
System:
The UNT Digital Library
Care is costly: buy and hold war bonds.
Small color poster of a wounded soldier sitting on the ground. He has bandages on his hand and leg and his camouflage helmet lies on the ground next to him.
Date:
1945
Creator:
Treidler, Adolph, 1886-1981
Object Type:
Poster
System:
The UNT Digital Library
Criminal investigation.
Describes procedures for criminal investigations conducted by military police during wartime. Discusses the purposes and functions of the Security Intelligence Corps (SIC).
Date:
April 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Transportation of the sick and wounded.
This guide is "published for the information and guidance of all concerned" (p. ii) about the proper protocol of transporting sick and wounded war victims. According to the Foreward, "It includes a description of the common methods and means of transporting patients on land, sea, and in the air, and is appropriately illustrated" (p. iii); the descriptions include manual, motor ambulance, rail, water, and air transportation.
Date:
February 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Effect of the Performance of a Turbosupercharged Engine of an Exhaust-Gas-to-Air Heat Exchanger for Thermal Ice Prevention
This report presents the results of a flight investigation to determine the effect on the performance of a turbosupercharged engine of an exhaust-gas-to-air heat exchanger installed between the engine-exhaust collector ring and the turbosupercharger. The background, results, and discussion of the investigation are described.
Date:
August 23, 1945
Creator:
Look, Bonne C.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Aircraft Heaters 18: A Design Manual for Exhaust Gas and Air Heat Exchangers
Report presenting a summary of a series of reports regarding heat exchangers, and in particular, the design of exhaust gas and air heat exchangers. The four parts included are a summary of heat transfer equations, single pass heat exchangers, heater performance in flight, and appendicies with additional aerodynamic information.
Date:
August 1945
Creator:
Boelter, L. M. K.; Martinelli, R. C.; Romie, F. E. & Morrin, E. H.
Object Type:
Report
System:
The UNT Digital Library
Dental X-ray machine (items 6088005, 6088010)
Describes the components and maintenance of two types of dental x-ray machines.
Date:
January 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Suction apparatus : portable, electric.
Contains information on the operation and maintenance of five types of portable electric suction apparatus used to remove blood and other fluids from body cavities during surgery.
Date:
May 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library