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Acid Processes for the Extraction of Alumina

Description: Report presenting the Bureau of Mines' investigation into acid processes of extracting alumina. The paper discusses the sulphuric acid processes and other work with hydrochloric and nitric acids so that the comparative advantages can be appreciated.
Date: 1927
Creator: Tilley, George S.; Millar, Russell Ward & Ralston, Oliver Caldwell
Partner: UNT Libraries Government Documents Department
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Aero Dopes and Varnishes

Description: Report discussing before proceeding to discuss the preparation of dope solutions, it will be necessary to consider some of the essential properties which should be possessed of a dope film, deposited in and on the surface of an aero fabric. The first is that it should tighten the material and second it should withstand weathering.
Date: July 1927
Creator: Britton, H. T. S.
Partner: UNT Libraries Government Documents Department
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The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number

Description: This report contains the aerodynamic properties of the wing sections U.S.A. 5, U.S.A. 27, U.S.A. 35 A, U.S.A. 35 B, Clark Y, R.A.F. 15, and Gottingen 387, as determined at various Reynolds numbers up to an approximately full scale value in the variable density wind tunnel of the National Advisory Committee for Aeronautics. It is shown that the characteristics of the wings investigated are affected greatly and in a somewhat erratic manner by variation of the Reynolds number. In general there is a small increase in maximum lift and an appreciable decrease in drag at all lifts.
Date: 1927~
Creator: Munk, Max M. & Miller, Elton W.
Partner: UNT Libraries Government Documents Department
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Air Force Tests of Sperry Messenger Model With Six Sets of Wings

Description: From Summary: "The purpose of this test was to compare six well-known airfoils, the R.A.F 15, U.S.A. 5, U.S.A. 27, U.S.A. 35-B, Clark Y, and Gottingen 387, fitted to the Sperry Messenger model, at full scale Reynolds number as obtained in the variable density wind tunnel of the National Advisory Committee for Aeronautics; and to determine the scale effect on the model equipped with all the details of the actual airplane. The results show a large decrease in minimum drag coefficient upon increasing the Reynolds number from about one-twentieth scale to full scale. A comparison is made between the results of these tests and those obtained from tests made in this tunnel on airfoils alone."
Date: January 20, 1927
Creator: Shoemaker, James M.
Partner: UNT Libraries Government Documents Department
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Airfoil lift with changing angle of attack

Description: From Summary: "Tests have been made in the atmospheric wind tunnel of the National Advisory Committee for Aeronautics to determine the effects of pitching oscillations upon the lift of an airfoil. It has been found that the lift of an airfoil, while pitching, is usually less than that which would exist at the same angle of attack in the stationary condition, although exceptions may occur when the lift is small or if the angle of attack is being rapidly reduced. It is also shown that the behavior of a pitching airfoil may be qualitatively explained on the basis of accepted aerodynamic theory."
Date: September 1927
Creator: Reid, Elliott G.
Partner: UNT Libraries Government Documents Department
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America Goes Over [Part 1]

Description: First of 5 reels documenting the activities of the American Expeditionary Forces in World War I, with footage featuring shots of European soldiers fighting and the entrance of the United States into the war with soldiers being drafted and trained. It also includes cartoons by famous A.E.F. artist Wally.
Date: 1927~
Duration: 16 minutes 06 seconds
Creator: United States. Army. Signal Corps.
Partner: UNT Libraries Special Collections
captions transcript

America Goes Over [Part 2]

Description: Second of 5 reels documenting the activities of the American Expeditionary Forces in World War I with footage of American soldiers on various assignments in Europe, particularly the Meuse-Argonne battle.
Date: 1927~
Duration: 15 minutes 48 seconds
Creator: United States. Army. Signal Corps.
Partner: UNT Libraries Special Collections
captions transcript

America Goes Over [Part 3]

Description: Third of 5 reels documenting the activities of the American Expeditionary Forces in World War I with footage of U.S. soldiers at camps and during battles at various locations in Europe, including the Saint-Mihiel Offensive.
Date: 1927~
Duration: 20 minutes 50 seconds
Creator: United States. Army. Signal Corps.
Partner: UNT Libraries Special Collections
captions transcript

America Goes Over [Part 4]

Description: Fourth of 5 reels documenting the activities of the American Expeditionary Forces in World War I, including footage of U.S. soldiers in France and the start of the Meuse-Argonne Offensive.
Date: 1927~
Duration: 17 minutes 59 seconds
Creator: United States. Army. Signal Corps.
Partner: UNT Libraries Special Collections
captions transcript

America Goes Over [Part 5]

Description: Fifth of 5 reels documenting the activities of the American Expeditionary Forces in World War I including general footage of U.S. soldiers in Europe as well as troops celebrating news of the November 11 cease-fire, and Joffre, Foch, Pershing, French, and other generals shaking hands.
Date: 1927~
Duration: 15 minutes 33 seconds
Creator: United States. Army. Signal Corps.
Partner: UNT Libraries Special Collections
open access

Annual Report for the National Advisory Committee for Aeronautics (12th). Administrative Report Including Technical Reports Nos. 233 to 256

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: 1927
Partner: UNT Libraries Government Documents Department
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Approximation method for determining the static stability of a monoplane glider

Description: The calculations in this paper afford an approximate solution of the static stability. A derivation of the formulas for moment coefficient of a wing, moment coefficient of elevator, and the total moment of the combined wing and elevator and the moment coefficient with reference to the center of gravity are provided.
Date: November 1927
Creator: Lippisch, A.
Partner: UNT Libraries Government Documents Department
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Approximations for Column Effect in Airplane Wing Spars

Description: "The significance attaching to "column effect" in airplane wing spars has been increasingly realized with the passage of time, but exact computations of the corrections to bending moment curves resulting from the existence of end loads are frequently omitted because of the additional labor involved in an analysis by rigorously correct methods. The present report represents an attempt to provide for approximate column effect corrections that can be graphically or otherwise expressed so as to be applied with a minimum of labor. Curves are plotted giving approximate values of the correction factors for single and two bay trusses of varying proportions and with various relationships between axial and lateral loads" (p. 485).
Date: 1927
Creator: Warner, Edward P. & Short, Mac
Partner: UNT Libraries Government Documents Department
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The Avro "Gosport," 504 R: A New Training Airplane

Description: Circular describing the Avro Gosport 504 R, which is a new training airplane that is lighter than other Avro training airplanes but is strong enough to withstand rough handling that may be encountered in training. Details of the fuselage, construction, ailerons, tail, struts, landing gear, fuel tanks, performance, characteristics, and photographs are provided.
Date: July 1927
Partner: UNT Libraries Government Documents Department

Bird in Space

Description: Sculpture of three brown wood geometric shapes at the base with a irregular metallic gold structure on top.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 1927~
Creator: Brancusi, Constantin
Partner: UNT College of Visual Arts + Design
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The Boeing Mail Airplane

Description: The Boeing Mail Airplane is a biplane with cloth covered wings of wood and wire construction, a top speed of 130 MPH, and a fuel capacity of 100 gallons in two tanks.
Date: August 1927
Partner: UNT Libraries Government Documents Department
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