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Life Zone Investigations in Wyoming

Description: Characterizes five transcontinental life zones in Wyoming; defines their extent and limits; lists mammal, breeding bird, reptile, amphibian, and plant species; and provides notes on distribution and abundance of trees observed during the survey.
Date: October 3, 1917
Creator: Cary, Merritt
Item Type: Refine your search to only Report
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The Pressure Distribution Over the Wings and Tail Surfaces of a PW-9 Pursuit Airplane in Flight

Description: This report presents the results of an investigation to determine (1) the magnitude and distribution of aerodynamic loads over the wings and tail surfaces of a pursuit-type airplane in the maneuvers likely to impose critical loads on the various subassemblies of the airplane structure, (2) To study the phenomenon of center of pressure movement and normal force coefficient variation in accelerated flight, and (3) to measure the normal accelerations at the center of gravity, wing-tip, and tail, i… more
Date: February 3, 1930
Creator: Rhode, Richard V.
Item Type: Refine your search to only Report
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Investigation of the Diaphragm-Type Pressure Cell

Description: "This report relates to various improvements in the process of manufacture of the NACA standard pressure cell. Like most pressure recording devices employing thin diaphragms, they would in general show considerable change in calibration with temperature and also some change of calibration with time or aging effect. The required diaphragm thickness and the desirable rate of mechanical magnification have been determined on the basis of several hundred tests" (p. 507).
Date: February 3, 1931
Creator: Theodorsen, Theodore
Item Type: Refine your search to only Report
open access

Air conditions close to the ground and the effect on airplane landings

Description: This report presents the results of an investigation undertaken to determine the feasibility of making glide landings in gusty air. Wind velocities were measured at several stations between the ground and a height of 51 feet, and flight tests were made to determine the actual influence of gusts on an airplane gliding close to the ground.
Date: April 3, 1934
Creator: Thompson, F. L.; Peck, W. C. & Beard, A. P.
Item Type: Refine your search to only Report
open access

The Measurement of the Field of View From Airplane Cockpits

Description: "A method has been devised for the angular measurement and graphic portrayal of the view obtained from the pilot's cockpit of an airplane. The assumption upon which the method is based and a description of the instrument, designated a "visiometer", used in the measurement are given. Account is taken of the fact that the pilot has two eyes and two separate sources of vision. The view is represented on charts using an equal-area polar projection, a description and proof of which are given" (p. 16… more
Date: October 3, 1934
Creator: Gough, Melvin N.
Item Type: Refine your search to only Report
open access

Ground Effect on Downwash Angles and Wake Location

Description: "A theoretical study was made of the reduction in downwash and the upward displacement of the wake in the presence of the ground, and some verification of theory was obtained by means of air-flow measurements made with a ground-board and image-wing combination. Methods are given for estimating the effects and numerous examples are included to illustrate the nature of these effects and to show their order of magnitude" (p. 1).
Date: October 3, 1941
Creator: Katzoff, S. & Sweberg, Harold H.
Item Type: Refine your search to only Report

Newsmap. Monday, August 3, 1942 : week of July 24 to July 31

Description: Text describes action on various war fronts: New Guinea -- China -- Philippines -- Siberia --Mediterranean -- Western Europe -- Russia. Large world map is keyed to text and illustrates time zones around the world. Includes inset maps: Action in New Guinea -- Drive to the Caucasas -- Vital distances in Europe, Africa, and Western Asia. Photographs: Combat photo taken through a submarine's periscope of a sinking Japanese destroyer -- U.S. aid to Russia -- Tommy goes over [method of crossi… more
Date: August 3, 1942
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, May 3, 1943 : week of April 23 to April 30, 190th week of the war, 72nd week of U.S. participation

Description: Front: Text describes action on various war fronts: Tunisia, Command, Air offensive, Russia, Southwest Pacific, Aleutians. Large world map shows the United Nations, Axis and Axis occupied areas, countries with Axis relations broken, and neutral countries. Inset maps show military activities across the globe during the week; Battle of Tunisia. Photographs: American infantrymen advance towards Gabes; Army's M-12 155mm gun; Bristol Beaufighters enroute to Wau. Back:Don't [help the enemy by ma… more
Date: May 3, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster
open access

Experimentation on the Extraction of Uranium from Western Ores by Leaching with Sodium Carbonate and Sodium Bicarbonate

Description: Purpose: "The purpose of the following experiments was to obtain data on the selective extraction of uranium over vanadiur from samples of vanadium ores by leaching with sodium carbonate or sodium bicarbonate solutions, with the object of establishing the time, temperature, and concentration conditions necessary for satisfactory extractions."
Date: December 3, 1943
Creator: Saunders, E. R. & Carosella, M. C.
Item Type: Refine your search to only Report

Newsmap. Monday, January 3, 1944 : week of December 22 to December 29, 1943, 225th week of the war, 107th week of U.S. participation

Description: Front: Text describes action on various war fronts: New Britain, Air offensive, USSR, Italy, Scharnhorst, Command. Maps: Central Italy showing rivers and roads, Distance from London to the coast of France near Boulogne, Coastline of northern Scandinavia. Photographs: American 155mm gun fires on German positions at Mignano; American soldiers temporarily reside in holes on Venafro Ridge; Equipment retreating Germans used to tear up railroad tracks; Allied troops clear the torn up tracks to… more
Date: January 3, 1944
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. For the Armed Forces. 238th week of the war, 120th week of U.S. participation

Description: Front: Text describes action on various war fronts: Eastern front, Burma, Western Europe, Italy, Southwest Pacific, Kuriles. Maps show Eastern Front; S. W. Pacific - Northern Bismarcks. Includes 9 photographs, 3 showing aerial incendiaries. Back: Southeastern Europe. Map.
Date: April 3, 1944
Creator: [United States.] Army Service Forces. Army Information Branch.
Item Type: Refine your search to only Poster
open access

Contributions to the Water Problem

Description: Technical report describing the investigation of the short-lived activities produced in oxygen compounds by irradiation with pile neutrons. The most prominent of these activities in cooling water is a beta and gamma emitting activity of about 8 second half-life. Because of its production by epicadmium neutrons it was believed to be the 8 second N16 produced in the pile by n,p on O16. The identification has been accomplished and it is established that the 8 second activity is N16. Part 2 of the… more
Date: July 3, 1944
Creator: Novey, Theodore B.
Item Type: Refine your search to only Report

Newsmap. For the Armed Forces. 251st week of the war, 133rd week of U.S. participation

Description: Front: Text describes action on various war fronts: France, Eastern front, Italy, Air war, Southeast Asia, China, Saipan, Pacific, Southwest Pacific. Maps: Finland, North Burma, France, Eastern front. Back: Text and color illustrations explain the importance of teamwork, preparation, and support in combined or amphibious operations.
Date: July 3, 1944
Creator: [United States.] Army Service Forces. Army Information Branch.
Item Type: Refine your search to only Poster
open access

The Distribution of Thermal Neutrons in a Slug with Thick End Caps

Description: The distribution of thermal neutrons in a W slug having a one centimeter aluminum end cap has been calculated on the basis of simple diffusion theory. It is found that the average neutron density, and therefore the power output, at the end of the slug is about 34% higher than the density far from the end cap. This result agrees well with the recent Argonne pile experiments (CP-1729).
Date: August 3, 1944
Creator: Wilkins, J. Ernest, Jr., 1923-2011
Item Type: Refine your search to only Report
open access

Temperature and Heat Flow in a Graphite Electrode

Description: In making various experimental heat studies a power producing metal slug is simulated by a slug with a graphite rod electrode of 3/8" diameter inserted lengthwise through it. There is a helium filled annular space between the graphite and the inner surface of the slug cylinder. Radiant heat passes from the electrode to the metal; with proper adjustment of the electrode current the slug in the steady state will therefor "produce" the same amount of energy from its exterior surface as it would un… more
Date: August 3, 1944
Creator: Schlegel, R.
Item Type: Refine your search to only Report
open access

Transference and Adsorption on Glass of Carrier Free Zirconium

Description: .Technical report describing the transference experiments. The carrying of zirconium and columbium by ferric hydroxide has a very marked dependence on pH. In the experiments it was noticed that the concentration of Zr activity in various solutions changed with time This indicated that the Zr was being adsorbed on the glass. The carrier free trace is adsorbed on glass. This effect must be considered in experiments with Zr tracer in glass apparatus.
Date: January 3, 1945
Creator: Dodgen, H. W. & Rollefson, G. F.
Item Type: Refine your search to only Report
open access

Knock-Limited Blending Characteristics of Benzene, Toluene, Mixed Xylenes, and Cumene in an Air-Cooled Cylinder

Description: "An investigation was conducted to determine the knock-limited blending characteristics of leaded fuels containing selected aromatic fuel components (benzene, toluene, mixed xylenes, and cumene). Each of the aromatics was blended with an alkylate blending agent and with a virgin base stock. The blending characteristics of the resulting fuels were determined in a full-scale aircraft-engine cylinder" (p. 1).
Date: February 3, 1945
Creator: Hensley, Reece V. & Breitwieser, Roland
Item Type: Refine your search to only Report
open access

Healing of Fast-Neutron-Induced Changes in Graphite. III. Further Experiments on Effect of Heating During Exposure

Description: Abstract. It has been established that heating samples of graphite during exposure in a pile decreases substantially the observed changes in the elastic modulus and electrical resistance caused by the irradiation. The functional relationship between the percentage changes observed and the temperature of exposure resembles the relationship between the final percentage changes and the temperature of heat treatment after exposure (cf. report CC-1668). Anomalous results reported previously for hi… more
Date: March 3, 1945
Creator: Neubert, T. J.; Novick, A.; Schenek, R. T.; Shapiro, E. & Van Dyken, A. R.
Item Type: Refine your search to only Report
open access

The Effect of Mach Number on the Aerodynamic Characteristics of a Single-Engine Pursuit Airplane as Determined From Tests of a 1/3-Scale Model

Description: Report discussing the effects of Mach number on the aerodynamic characteristics of an Allison powered single-engine pursuit airplane. Information about the lift, drag, pitching-moment characteristics, stability, tail effectiveness, and elevator effectiveness with Mach number is provided.
Date: May 3, 1945
Creator: Robinson, Robert C. & Jessen, Henry
Item Type: Refine your search to only Report
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