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Tension experiments on diaphragm metals

Description: Strips of german silver, steel, copper, duralumin, nickel and brass were tested in tension in an apparatus in which the change in deflection with time was measured by means of an interferometer. This change in deflection with time caused by the application and removal of a load is defined as "drift" and "recovery," respectively. It was measured in the time interval from approximately 5 seconds to 5 hours after loading. The data are given in a series of graphs in which the drift and recovery are… more
Date: August 1927
Creator: Henrickson, H. B.
Partner: UNT Libraries Government Documents Department
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The Installation and Correction of Compasses in Airplanes

Description: "The saving of time that results from flying across country on compass headings is beginning to be widely recognized. At the same time the general use of steel tube fuselages has made a knowledge of compass correction much more necessary than was the case when wooden fuselages were the rule. This paper has been prepared primarily for the benefit of the pilot who has never studied navigation and who does not desire to go into the subject more deeply than to be able to fly compass courses with co… more
Date: August 1927
Creator: Schoeffel, M. F.
Partner: UNT Libraries Government Documents Department
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A load factor formula

Description: The ultimate test of a load factor formula is experience. The chief advantages of a semi rational formula over arbitrary factors are that it fairs in between points of experience and it differentiates according to variables within a type. Structural failure of an airplane apparently safe according to the formula would call for a specific change in the formula. The best class of airplanes with which to check a load factor formula seems to be those which have experienced structural failure. Table… more
Date: August 1927
Creator: Miller, Roy G.
Partner: UNT Libraries Government Documents Department
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Pressure distribution on wing ribs of the VE-7 and TS airplanes in flight

Description: This paper is the first of a series of notes, each of which presents the complete results of pressure distribution tests made by the National Advisory Committee for Aeronautics, on single-wing ribs of the VE-7 and TS airplanes for a particular condition of flight. The level flight results are presented here in the form of curves and show the comparison between the pressure distribution over a representative thin wing, R.A.F.-15, and a moderately thick wing, U.S.A.-27, throughout the range of an… more
Date: October 1927
Creator: Rhode, R. V.
Partner: UNT Libraries Government Documents Department
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Mass distribution and performance of free flight models

Description: This note deals with the mass distribution and performance of free flight models. An airplane model which is to be used in free flight tests must be balanced dynamically as well as statically, e.g., it must not only have a given weight and the proper center of gravity but also a given ellipsoid of inertia. Equations which relate the motions of an airplane and its model are given. Neglecting scale effect, these equations may be used to predict the performance of an airplane, under the action of … more
Date: October 1927
Creator: Scherberg, Max & Rhode, R. V.
Partner: UNT Libraries Government Documents Department
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The Distribution of Loads Between the Wings of a Biplane Having Decalage

Description: "It is known that in a biplane the load is not distributed equally between the wings. The presence of one wing will affect the lift characteristics of the other wings. A designer must know the total load that each wing carries in order that he may design an adequate structure. The purpose here is to determine the distribution of loads between the wings of a biplane at various angles of decalage, when the gap/chord ratio is one, and there is no stagger" (p. 1).
Date: November 1927
Creator: Mock, Richard M.
Partner: UNT Libraries Government Documents Department
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Technical Preparation of the Airplane "Spirit of St. Louis"

Description: Given here is a brief history of the design and construction of the "Spirit of St. Lewis", the airplane that Charles Lindbergh flew solo across the Atlantic. Although the plan was to modify a standard model Ryan M-2, it was quickly determined that modification was less practical than redesign. Given here are the general dimensions, specifications, weight characteristics, and man hours required to build the aircraft.
Date: July 1927
Creator: Hall, Donald A.
Partner: UNT Libraries Government Documents Department
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A warning concerning the take-off with heavy load

Description: "A successful take-off can be made with an airplane so heavily loaded that it cannot climb to a height greater than the span of its wings. The explanation is that the power required to maintain level flight at an altitude of the order of the wing span may be as much as 50 per cent greater than that necessary when the airplane is just clear of the ground. The failure of heavily loaded airplanes to continue climbing at the rate attained immediately after the actual take-off is a grave hazard and … more
Date: July 1927
Creator: Reid, Elliott G. & Carroll, Thomas
Partner: UNT Libraries Government Documents Department
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"A L C L A D": A New Corrosion Resistant Aluminum Product

Description: Described here is a new corrosion resistant aluminum product which is markedly superior to the present strong alloys. Alclad is a heat-treated aluminum, copper, manganese, magnesium alloy that has the corrosion resistance of pure metal at the surface and the strength of the strong alloy underneath. Of particular importance is the thorough character of the union between the alloy and the pure aluminum.
Date: August 1927
Creator: Dix, E. H., Jr.
Partner: UNT Libraries Government Documents Department
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Measurement of the Moments of Inertia of Full Scale Airplanes

Description: "This paper contains a description of the method of measuring the moments of inertia of full scale airplanes as practiced by the National Advisory Committee for Aeronautics at the Langley Memorial Aeronautical Laboratory. The method, while not at all new, is published for the information and guidance of others who may desire to make similar measurements. The paper includes as an appendix the computations for the moments of inertia of 0-2 airplane" (p. 1).
Date: September 1927
Creator: Green, M. W.
Partner: UNT Libraries Government Documents Department
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Precision of Wing Sections and Consequent Aerodynamic Effects

Description: Note presenting an investigation to determine the precision of wing sections of wood fabric construction used on a number of airplanes. All of the wing sections were found to deviate more or less from their respective prototypes. The aerodynamic effects resulting from consideration of thickness variation are then estimated from existing empirical information.
Date: January 1927
Creator: Rizzo, Frank
Partner: UNT Libraries Government Documents Department
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The Characteristics of the N.A.C.A 97, Clark Y, and N.A.C.A. M6 Airfoils with Particular Reference to the Angle of Attack

Description: Report examining the aerodynamic characteristics of three airfoil sections as determined in the variable density wind tunnel. Particular attention is given to the relation of the characteristics to the angle of attack and their use in airplane design.
Date: December 1927
Creator: Higgins, George J.
Partner: UNT Libraries Government Documents Department
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Tests of the N.P.L. airship models in the variable density wind tunnel

Description: Report presenting testing in the variable density wind tunnel on two airship models known as the NPL Standardization Models, long and short. The resistance or shape coefficients were determined for each model through a range of Reynolds numbers. Further work is found to be necessary in the standardization of wind tunnels.
Date: September 1927
Creator: Higgins, George J.
Partner: UNT Libraries Government Documents Department
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Fifty-Nine Coal-Mine Fires: How They Were Fought and What They Teach

Description: Introduction: "This bulletin abstracts and reviews essential details of reports on 59 fires in different coal mines in the United States, describes the circumstances of origin and the methods of controlling or extinguishing the fires, and points out the lessons taught."
Date: 1927
Creator: Rice, George S.; Paul, J. W. & von Bernewitz, M. W.
Partner: UNT Libraries Government Documents Department
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Quarry Accidents in the United States During the Calendar Year 1925

Description: Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date: 1927
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department
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Gases from Blasting in Tunnels and Metal-Mine Drifts

Description: From Introduction: "This paper gives the results of sampling the gases from blasting drift rounds at five mines-the United Verde Extension, Calumet & Arizona, Old Dominion, Mountain Copper, and the United Verde-and of tunnel rounds at the Big Creek water tunnel and Moffat railroad tunnel. The paper also describes the rounds blasted and the methods of sampling and analyzing the gases. In all, 99 rounds were fired and 376 samples were taken."
Date: 1927
Creator: Gardner, E. D.; Howell, S. P. & Jones, G. W.
Partner: UNT Libraries Government Documents Department
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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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Metal-Mine Accidents in the United States During the Calendar Year 1925

Description: Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date: 1927
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in the United States, 1926

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1927
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department
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Coal-Dust Explosion Tests in the Experimental Mine, 1919 to 1924, Inclusive

Description: From Introduction and Summary: "This bulletin describes the third series of coal-dust explosion tests by the Bureau of Mines in its experimental mine and covers a period from 1919 to the end of 1924, inclusive. A few related tests made in 1925 are also included."
Date: 1927
Creator: Rice, George S.; Paul, J. W. & Greenwald, H. P.
Partner: UNT Libraries Government Documents Department
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Quarry Problems in the Lime Industry

Description: From Introduction: "The purpose of this bulletin is not to describe individual quarries but to describe general methods of operation and give typical illustrations. The methods employed are discussed critically in an effort to elucidate the best working principles and to assist manufactures of lime in correcting errors and establishing their industry on the most economical and efficient basis."
Date: 1927
Creator: Bowles, Oliver & Myers, W. M.
Partner: UNT Libraries Government Documents Department
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Production of Sponge Iron

Description: From Review of Sponge-Iron Processes: "This review of the development if the sponge-iron process to its present state gives only the important types of furnaces or processes tried."
Date: 1927
Creator: Williams, C. E.; Barrett, E. P. & Larsen, B. M.
Partner: UNT Libraries Government Documents Department
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Problems in the Firing of Refractories

Description: From Introduction: "In large measure the work was an outgrowth of that done by the bureau in the investigation of burning problems for Four Heavy Clay Products Associations."
Date: 1927
Creator: Bole, G. A.; Blizard, John; Rice, W. E.; Ogden, E. P. & Sherman, R. A.
Partner: UNT Libraries Government Documents Department
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