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The Compressibility Burble and the Effect of Compressibility on Pressures and Forces Acting on an Airfoil

Description: "Simultaneous air-flow photographs and pressure-distribution measurements were made of the NACA 4412 airfoil at high speeds to determine the physical nature of the compressibility burble. The tests were conducted in the NACA 24-inch high-speed wind tunnel. The flow photographs were obtained by the Schlieren method and the pressures were simultaneously measured for 54 stations in the 5-inch-chord airfoil by means of a multiple-tube manometer. Following the general program, a few measurements of total-pressure loss in the wake of the airfoil at high speeds were made to illustrate the magnitude of the losses involved and the extent of the disturbed region; and, finally, in order to relate this work to earlier force-test data, a force test of a 5-inch-chord NACA 4412 airfoil was made" (p. 73).
Date: July 6, 1938
Creator: Stack, John; Lindsey, W. F. & Littell, Robert E.
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, July 6, 1942 : week of June 26 to July 2

Description: Front: Text describes action on various war fronts including Midway, Western Europe, Russia, Egypt, Southwest Pacific, Mediterranean, China, and Jugoslavia. Large world map is keyed to text and illustrates time zones around the world. Includes two inset maps: "Rommel drives east for Suez"; Nazi-Russian battles near Kursk. Photographs: Saboteurs' weapons, Port of embarkation, Allied leaders in the Middle East [Major Gen. Russell L. Maxwell, General Sir Claude Auchinleck], Armoured observation car, U.S. Army troops in shadow of the pyramids; British mechanized unit salvages a disabled tank; Blocking Nazi tanks;"Production hits its stride". Back: Poster features photographs of British weapons.
Date: July 6, 1942
Creator: [United States]. Army Orientation Course.
Partner: UNT Libraries Government Documents Department

THE EFFECT OF RADIATION ON THE CORROSION OF METALS BY WATER. (Problem No. 322 MLC 2213)

Description: Long-time tests have been made on the effect of various types of radiation on the corrosion of 2S aluminum in simulated W water. In no case was any acceleration of corrosion by the radiation observed; the effect of radiation, if any, appeared to be a protective one. Deuteron irradiation did accelerate the corrosion of mild steel at low flow rates in hot water of pH 6 to 7, but no appreciable effect was observed with copper, stainless steel, or tuballoy. The general theory of the effect of radiation on corrosion is discussed, with the conclusion that no acceleration of corrosion by radiation is to be expected in most cases of practical interest. (auth)
Date: July 6, 1944
Creator: Allen, A.O.; Bowman, M.C.; Goldowski, N.; Larson, R.G. & Treiman, L.
Partner: UNT Libraries Government Documents Department

Consequences of high power levels

Description: This memo discusses the effects of advancing to higher power levels of the 105 Piles (D-Pile). It is concluded that there is no technical reason against a cautious advance to higher powers; the units can be run at higher levels than their rating of 250 MW, or the additional reactivity that they will gain with time may be taken entirely in the form of lower peak temperatures and radiation levels. The decision as to what course to follow between these extremes involves such issues as the best use of uranium and the most effective separation of adequate amounts of product of proper quality.
Date: July 6, 1945
Creator: Worthington, H.
Partner: UNT Libraries Government Documents Department

Effect of Mach and Reynolds Numbers on the Maximum Lift Coefficient Obtainable in Gradual and Abrupt Stalls of a Pursuit Airplane Equipped With a Low-Drag Wing

Description: Report discussing flight tests on a low-drag wing pursuit airplane to determine the effects of Mach and Reynolds numbers on the maximum lift coefficient obtainable in gradual and abrupt stalls. The obtainable maximum lift coefficient was found to be greatly affected by the Mach and Reynolds numbers in gradual stall. In abrupt stalls, the maximum lift coefficient was affected by the Mach number, but not the Reynolds number.
Date: July 6, 1945
Creator: Spreiter, John R.; Galster, George M. & Blair, William K.
Partner: UNT Libraries Government Documents Department

Altitude-Test-Chamber Investigation of a Solar Afterburner on the 24C Engine 1 - Operational Characteristics and Altitude Limits

Description: "An altitude-test-chamber investigation was conducted to determine the operational characteristics and altitude blow-out limits of a Solar afterburner in a 24C engine. At rated engine speed and maximum permissible turbine-discharge temperature, the altitude limit as determined by combustion blow-out occurred as a band of unstable operation of about 8000 feet altitude in width with maximum altitude limits from 32,000 feet at a Mach number of 0.3 to about 42,000 feet at a Mach number of 1.0. The maximum fuel-air ratio of the afterburner, as limited by maximum permissible turbine-discharge gas temperatures at rated engine speed, varied between 0.0295 and 0.0380 over a range of flight Mach numbers from 0.25 to 1.0 and at altitudes of 20,000 and 30,000 feet" (p. 1).
Date: July 6, 1948
Creator: Dowman, Harry W. & Reller, John O.
Partner: UNT Libraries Government Documents Department

Charts for Determining Preliminary Values of Span-Load, Shear, Bending-Moment, and Accumulated-Torque Distributions of Swept Wings of Various Taper Ratios

Description: Contains charts for use in determining preliminary values of the spanwise-load, shear, bending-moment, and accumulated-torque distributions of swept wings. The charts are based on strip theory and include four aerodynamic-load distributions, two section-moment distributions, and two inertia-load distributions. The taper ratios considered cover the range from 1.0 to 0 and the results are applicable to any angle of sweep.
Date: July 6, 1948
Creator: Wollner, Bertram C.
Partner: UNT Libraries Government Documents Department

Wind-Tunnel Investigation of the Low-Speed Static Stability and Control Characteristics of a Model of Bell MX-776

Description: An investigation has been made in the Langley stability tunnel to determine the low-speed static stability and control characteristics of a model of the Bell MX-776. The results of the investigation indicated that the basic model configuration was longitudinally stable in the angle-of-attack range from about -16 deg. to 16 deg. but that the stability was a minimum near O deg angle of attack. The data indicated an aerodynamic-center position about 0.64 body diameters behind the center of gravity at low angles of attack. Reduction in the size of the front horizontal fins increased the longitudinal stability. With 20 percent of the span of the normal front horizontal fins cut off the aerodynamic center was about 1.04 body diameters behind the center of gravity, and with front horizontal fins having the same area as the front vertical fins, the aerodynamic center was 2.26 body diameters behind the center of gravity (at low angles of attack).
Date: July 6, 1949
Creator: Queijo, M. J. & Michael, W. H., Jr.
Partner: UNT Libraries Government Documents Department

Low-speed lateral stability and aileron-effectiveness characteristics at a Reynolds number of 3.5 x 10(exp 6) of a wing with leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip

Description: Report presenting results of an investigation of the lateral stability and aileron-effectiveness characteristics of a wing with the leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip. Results regarding the static lateral stability characteristics and aileron characteristics are provided.
Date: July 6, 1950
Creator: Lange, Roy H. & McLemore, Huel C.
Partner: UNT Libraries Government Documents Department

[News Script: Lawyer's meeting]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering a news story about delegates registering in Dallas for the state bar association meeting.
Date: July 6, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: News briefs one]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering three news stories. The first story is about a star ballerina, Marie Tallchief, teaching classes in Dallas while she is staying in the city for a role in a production. The second story is about a builder from Fort Worth traveling to Europe on behalf of the Fort Worth Home Builder's Association to research European solutions to problems of housing shortages. The third story is about a Dallas woman who, after a car crashed through her fence, chained up the car and refused to release it until the driver's insurance company paid her.
Date: July 6, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Investigation of 16-inch impulse-type supersonic compressor rotor with turning past axial direction

Description: Report presenting an experimental investigation using a 16-inch impulse-type supersonic-compressor rotor as a separate component, which obtained a maximum total-pressure ratio of 5.42 and an adiabatic efficiency of 0.76 at 101-percent design speed. The rotor could operate over a wide range of back pressures, but it did not obtain the design impulse condition. Results regarding the rotor-component investigation and stage investigation are provided.
Date: July 6, 1953
Creator: Jacklitch, John J., Jr. & Hartmann, Melvin J.
Partner: UNT Libraries Government Documents Department

Investigation of Effects of Grain Size Upon Engine Life of Cast AMS 5385 Gas Turbine Blades

Description: Report presenting an investigation to determine the effects of pouring temperature and grain size on the uniformity of lives and initial failure times of groups of AMS 5385 gas turbine blades and to relate the individual lives of the blades to grain size. This is due to the fact that the uniformity of lift of cast alloy gas-turbine blades is generally unsatisfactory. Results regarding the metallurgical examination are provided.
Date: July 6, 1953
Creator: Hoffman, C. A. & Gyorgak, C. A.
Partner: UNT Libraries Government Documents Department

[News Script: Burnett proposal]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering a news story about a Athletic Relations Committee of the Dallas Chamber of Commerce luncheon to discuss the possibility of acquiring a Major League Baseball team.
Date: July 6, 1954
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: News brief - Odd Fellow]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering a news story about the arrival of James R. French, the sovereign Grand Master of World Odd Fellowship, in Fort Worth to commemorate the 100th anniversary of the Dallas Odd Fellow Lodge.
Date: July 6, 1954
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections