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The belt method for measuring pressure distribution

Description: "The measurement of pressure distribution may be accomplished rapidly for any number of locations deemed necessary in model or full-scale investigations by use of the 'belt' method. Reasonable accuracy may be obtained by careful use of this method" (p. 1).
Date: February 1943
Creator: Corson, Blake W., Jr.
Partner: UNT Libraries Government Documents Department

The Call Number, Volume 4, Number 5, February 1943

Description: Newsletter "issued monthly during the regular session by the students in the Department of Library Service, North Texas State Teachers College, Denton, Texas" (p. 1). The periodical contains: editorials; announcements; news items; poetry; and personals concerning students, faculty, staff, and alumni.
Date: February 1943
Creator: North Texas State Teachers College. Library Service Department.
Partner: UNT College of Information

Construction of weather maps, charts and diagrams

Description: "This supplement outlines in detail the methods for plotting of observation data, for entry of analysis, and for preparation of supplementary maps, charts, and diagrams for all Army Air Forces weather stations."
Date: February 2, 1943
Creator: United States. War Department.
Partner: UNT Libraries Government Documents Department

Development of thermal ice-prevention equipment for the B-24D airplane

Description: Report presenting a thermal ice-prevention system for the B-24D airplane. The report includes a description of the design and an outline of the method of design analysis. Results of performance tests of the installation will be presented in a supplementary report.
Date: February 1943
Creator: Jones, Alun R. & Rodert, Lewis A.
Partner: UNT Libraries Government Documents Department

The Effects of Angle of Dead Rise and Angle of Afterbody Keel on the Resistance of a Model of a Flying-Boat Hull

Description: Report presenting a series of models of flying-boat hulls tested to determine the effects of the angle of dead rise and the angle of afterbody keel on resistance and spray characteristics. Three angles of dead rise and three angles of afterbody keel were investigated. The results are expressed in nondimensional coefficients.
Date: February 1943
Creator: Bell, Joe W. & Willis, John M., Jr.
Partner: UNT Libraries Government Documents Department

Flutter tests on SB2U model in 16-foot tunnel

Description: Report presenting testing of the flutter characteristics of the SB2U-2 airplane. The secondary purpose of the test, which ended up being the primary purpose, was to study the behavior of the airplane just below the flutter speed. Results regarding flutter amplitude, frequencies, and energy-absorbing qualities are provided.
Date: February 1943
Creator: Theodorsen, Theodore; Coleman, R. P. & Smith, N. H.
Partner: UNT Libraries Government Documents Department

Generalized performance selection charts for single-engine pursuit airplanes

Description: Report presenting an investigation of the effect of wing loading, power loading, and aspect ratio on the performance of pursuit airplanes. The study is based on data combined from specifications, wind-tunnel, and flight tests of various airplanes and presented in graphs.
Date: February 1943
Creator: Ivey, H. Reese; Stickle, George W. & Brevoort, Maurice J.
Partner: UNT Libraries Government Documents Department

High-speed wind-tunnel tests of a 1/14-scale model of a four-engine cargo airplane

Description: Report presenting tests on a scale model of a four-engine cargo airplane, which was tested in the high-speed wind tunnel. The high-speed characteristics of the airplane, particularly the longitudinal stability and control in dives were investigated. Test results indicated that no important changes in longitudinal stability or controllability occurred until the speed exceeded the predicted maximum level-flight speed by more than 38 percent.
Date: February 1943
Creator: Hamilton, William T.
Partner: UNT Libraries Government Documents Department

A Hot-Wire Circuit With Very Small Time Lag

Description: A circuit for a hot-wire anemometer for the measurement of fluctuating flow is presented in the present report. The principal elements of the circuit are a Wheatstone bridge, one branch of which is the hot wire; and an electronic amplifier and a current regulator for the brief current which in combination maintain the bridge balance constant. Hence the hot wire is kept at practically constant resistance and temperature, and the time lag caused by thermal inertia of the wire is thereby reduced. Through the addition of a nonlinear amplifying stage the reading of the instrument has been rendered proportional to the velocity. A discussion of certain characteristics of the circuit and the results of related calibrating tests are given.
Date: February 1943
Creator: Weske, John R.
Partner: UNT Libraries Government Documents Department

[The Interior of the Shaw Studio, February 1943]

Description: Photograph of in interior of Shaw Studio for photography. There is an individual female behind the counter and three individual customers. Two are female and one is male. There are many portraits inside and on the counter, the females are are wearing dresses, and the male is wearing a jacket with the words "FALCONS" and "NTSTC" on the back.
Date: February 1943
Partner: UNT Libraries Special Collections

Jet-Boundary Corrections to a Yawed Model in a Closed Rectangular Wind Tunnel

Description: Report presenting general formulas for determining the jet-boundary corrections to the angle of attack, the drag coefficient, the downwash, the pitching, rolling, and yawing-moment coefficients of complete powered yawed models, and to the increments of rolling and yawing-moment coefficients due to the ailerons on yawed models.
Date: February 1943
Creator: Swanson, Robert S.
Partner: UNT Libraries Government Documents Department

Methods of Measurement of High Air Velocities by the Hot-Wire Method

Description: Investigations of strengths of hot wires at high velocities were conducted with platinum, nickel, and tungsten at approximately 200 Degrees Celcius hot-wire temperature. The results appear to disqualify platinum for velocities approaching the sonic range; whereas nickel withstands sound velocity, and tungsten may be used for supersonic velocities under standard atmospheric conditions. Hot wires must be supported by rigid prolongs at high velocities to avoid wire breakage. Resting current measurements for constant temperature show agreement with King's relation.
Date: February 1943
Creator: Weske, John R.
Partner: UNT Libraries Government Documents Department

NACA Radio Ground-Speed System for Aircraft

Description: Report presenting a method utilizing the Doppler effect on radio signals for determining the speed and distance traveled of an airplane. The method is called the NACA radio ground-speed system and uses the standard radio transmitter already found in most aircraft. Flight tests were made in which the method was used and the results were consisted with calibrated airspeed indications and stop-watch measurements.
Date: February 1943
Creator: Hastings, Charles E.
Partner: UNT Libraries Government Documents Department

NACA Radio Ground-Speed System for Aircraft, Special Report

Description: "A method that utilizes the Doppler effect on radio signals for determining the speed of an airplane and the distance traveled by the airplane has been developed and found to operate satisfactorily. In this method, called the NACA radio ground-speed system, standard readily available radio equipment is used almost exclusively and extreme frequency stability of the transmitters is not necessary. No complicated equipment need be carried in the airplane, as the standard radio transmitter is usually adequate" (p. 1).
Date: February 1943
Creator: Hastings, Charles E.
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, February 1, 1943 : week of January 22 to January 29

Description: Front: Text describes action on various war fronts: Allied Council, North Africa, Western Europe, Solomons, New Guinea, Wake, Russia, Aleutians. Includes ten photographs. Large world map is keyed to text and illustrates time zones around the world. Inset maps show North Africa and Russia. Back: "Soviet Infantry." Two posters by Glen Mitchell show Soviet infantry in action. Also included are images of Soviet uniform insignia and Soviet weapons.
Date: February 1, 1943
Creator: [United States.] Army Orientation Course.
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, February 8, 1943 : week of January 29 to February 5

Description: Front: Text describes action on various war fronts. Large world map is keyed to text and illustrates time zones around the world. Inset maps: [Rostov area] ; [Tunisia coast]. Includes 8 photographs. Back: The World at War map indicates points where U.S. forces are stationed.
Date: February 8, 1943
Creator: [United States.] Army Orientation Course.
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, February 15, 1943 : week of February 5 to February 12

Description: Front: Text describes action on various war fronts: Command, Solomons, North Africa, New Guinea, Russia. Large world map is keyed to text and illustrates time zones around the world. Inset maps of Guadalcanal; Russian front. Photographs: Heads down [under the barbed wire]; Jap navel gun; Near the end [fighting in Papua]; North Africa; Poles in Iraq; Vital supply: water for the Eighth Army; German mortar. Back: Poster illustrates uniforms and insignia of the German Army.
Date: February 15, 1943
Creator: [United States.] Army Orientation Course.
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, February 22, 1943 : week of February 12 to February 19, 180th week of the war, 62nd week of U.S. participation

Description: Front: Text describes action on various war fronts: Russia, New Guinea, Solomons, China, Pacific and Far East, French fleet, North Africa. Large world map is keyed to text. Includes table: Great Circle Distances in Statute Miles. Inset maps show Tunisia and Russia. Includes 8 photographs. Back: Poster provides recognition cues and front and profile drawings of Allied and Axis light tanks and self-propelled weapons. Includes range scale.
Date: February 22, 1943
Creator: [United States.] Army Orientation Course.
Partner: UNT Libraries Government Documents Department

Piezoelectric Instruments of High Natural Frequency Vibration Characteristics and Protection Against Interference by Mass Forces

Description: "The exploration of the processes accompanying engine combustion demands quick-responding pressure-recording instruments, among which the piezoelectric type has found widespread use because of its especially propitious properties as vibration-recording instruments for high frequencies. Lacking appropriate test methods, the potential errors of piezoelectric recorders in dynamic measurements could only be estimated up to now. In the present report a test method is described by means of which the resonance curves of the piezoelectric pickup can be determined; hence an instrumental appraisal of the vibration characteristics of piezoelectric recorders is obtainable" (p. 1).
Date: February 1943
Creator: Gohlke, Werner
Partner: UNT Libraries Government Documents Department

A portable calibrator for dynamic strain gages

Description: From Summary: "A portable device for calibrating dynamic strain gages is described. The device contains a motor-driven cam, which applies alternating tensile loads to a metal strip 5/8 inch wide and 6 1/4 inches long. The cam is designed to produce a nearly sinusoidal variation of strain with time. Dynamic strain gages with gage lengths up to 5 inches may be calibrated by mounting them on the strip and by changing the frequency and the amplitude of the tensile load. The frequency may be varied from 15 to 30 cycles per second and the strain amplitude from 0 to 10x10-4 in steps of 2x10-4."
Date: February 1943
Creator: McPherson, Albert E.
Partner: UNT Libraries Government Documents Department

Preliminary Investigation of the Effect of Compressibility on the Maximum Lift Coefficient, Special Report

Description: "Preliminary data are presented on the variation of the maximum lift coefficient with Mach number. The data were obtained from tests in the 8-foot high-speed tunnel of three NACA 16-series airfoils of 1-foot chord. Measurements consisted primarily of pressure-distribution measurements in order to illustrate the nature of the phenomena. It was found that the maximum lift coefficient of airfoils is markedly affected by compressibility even at Mach numbers as low as 0.2" (p. 1).
Date: February 1943
Creator: Stack, John; Fedziuk, Henry A. & Cleary, Harold E.
Partner: UNT Libraries Government Documents Department

Pressure Distribution on the Fuselage of a Midwing Airplane Model at High Speeds

Description: Report presenting the pressure distribution on the fuselage of a midwing airplane model measured in the 8-foot high-speed wind tunnel at a range of speeds and lift coefficients. The primary purpose of the investigation was to provide data showing the air pressures on various parts of the fuselage for use in structural design.
Date: February 1943
Creator: Delano, James B.
Partner: UNT Libraries Government Documents Department