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NACA Research Memorandums
439
Atomic Energy Commission Reports
388
NACA Technical Notes
327
GJBX
239
United States Department of Energy Grand Junction Office Reports
189
NACA Technical Memorandums
143
United States Geological Survey Reports
126
Argonne National Laboratory Reports
119
Hanford Works Reports
98
NACA Wartime Reports
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The Vapor Pressure of Arsenic Trioxide
Technical paper issued by the Bureau of Mines over investigations of vapor pressure. The methods and equipment used for the investigations are presented. The results are discussed. This paper includes tables, illustrations, and photographs.
Date:
March 1915
Creator:
Welch, H. V. & Duschak, L. H.
Object Type:
Report
System:
The UNT Digital Library
Standard Test Specimens of Zinc Bronze (Cu 88, Sn 10, Zn 2) - Parts 1 and 2: Part 1. - Preparation of Specifications, Part II. - Microstructure
Technical paper issued by the Bureau of Standards over tests conducted on the preparation of an alloy. The tests conducted, and their results are presented and discussed. This paper includes tables, illustrations, and photographs.
Date:
March 15, 1916
Creator:
Karr, C. P. & Rawdon, Henry S.
Object Type:
Report
System:
The UNT Digital Library
The Ultra-Violet and Visible Transmission of Various Colored Glasses
Technical paper issued by the Bureau of Standards over studies conducted on transmissions of ultra-violet energy through different colored glasses. As stated in the introduction, "in the present paper are given the transmissions for the visible and ultra-violet of a large number of glasses, mostly colored, which are not used primarily for eye protection, but which are useful for various other purposes" (p. 3). This paper includes illustrations, and photographs.
Date:
March 19, 1920
Creator:
Gibson, K. S.; Tyndall, E. P. T. & McNicholas, H. J.
Object Type:
Report
System:
The UNT Digital Library
Abacus Giving the Variation of the Mean Pressure of an Aviation Engine as a Function of its Speed of Rotation
Comparing the results of the calculations for computing the mean pressure of an aviation engine for any number of revolutions, with those of experiment, the writer, by numerous examples, shows the perfect agreement between them. This report will show that, by means of a special abacus, an engineer can instantly plot the characteristics of an engine.
Date:
March 1921
Creator:
Margoulis, W.
Object Type:
Report
System:
The UNT Digital Library
Airplane Crashes: Engine Troubles: A Possible Explanation
The aim was to bring attention to what might be the cause of some aircraft accidents for which there was no satisfactory explanation. The author notes that in testing aircraft accidents at the Bureau of Standards, it happened frequently that the engine performance became erratic when the temperature of the air entering the carburetor was between 0 C and 20 C. Investigation revealed the trouble to have been caused by the formation and collection of snow somewhere between the entrance to the carburetor and the manifold, probably at the throttle.
Date:
March 1921
Creator:
Sparrow, Stanwood W.
Object Type:
Report
System:
The UNT Digital Library
Analytical methods for computing the polar curves of airplanes
This report presents a method of calculating polar curves which is at least as precise as graphical methods, but it more rapid. Knowing the wind tunnel test of a wing and the performances of an airplane of the same profile, it is easy to verify the characteristic coefficients and, at the same time, the methods determining induced resistances.
Date:
March 1921
Creator:
Le Sueur
Object Type:
Report
System:
The UNT Digital Library
The Art of Writing Scientific Reports
As the purpose of the report is to transmit as smoothly and as easily as possible, certain facts and ideas, to the average person likely to read it, it should be written in a full and simple enough manner to be comprehended by the least tutored, and still not be boring to the more learned readers.
Date:
March 1921
Creator:
Norton, F. H.
Object Type:
Report
System:
The UNT Digital Library
Extract From a Report on the Resistance of Spheres of Small Diameter in an Airstream of High Velocity
Much attention is given here to the design of the wind tunnel and the experimental set-up. In comparing their results on the wind resistance of spheres to the results of other researchers, the authors find wide discrepancies. They are unable to explain the cause of the discrepancies, concluding, as they do, that the differing results could not be explained by the action of the wind tunnel walls.
Date:
March 1921
Creator:
Toussaint & Hayer
Object Type:
Report
System:
The UNT Digital Library
The Factors That Determine the Minimum Speed of an Airplane
The author argues that because of a general misunderstanding of the principles of flight at low speed, there are a large number of airplanes that could be made to fly several miles per hour slower than at present by making slight modifications. In order to show how greatly the wing section affects the minimum speed, curves are plotted against various loadings. The disposition of wings on the airplane slightly affects the lift coefficient, and a few such cases are discussed.
Date:
March 1921
Creator:
Norton, F. H.
Object Type:
Report
System:
The UNT Digital Library
The Goebel Rotary Engine
This report presents a table of specifications of the rotary engine and a very brief description of some of the notable features such as the exhaust valves controlled by means of a fixed cam gear.
Date:
March 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Influence of Span and Load Per Square Meter on the Air Forces of the Supporting Surface
"It should be clear that in order to obtain a lift it is necessary that the air which flows past an aerofoil be given a downward acceleration; indeed the lift can be only the reaction produced by the downward acceleration of the flowing air. The motion of the air in the neighborhood of an aerofoil may be followed theoretically with great exactness. In the following, it will be undertaken to make understood, through the simplest possible considerations, the effect of span and loading on the air force on an aerofoil, and while these do not form a strong proof of the correctness of the formulae developed, yet they explain the essential features of the phenomena" (p. 1).
Date:
March 1921
Creator:
Betz, A.
Object Type:
Report
System:
The UNT Digital Library
The Law Relating to Air Currents
In the subdivided wing section profile, the diagram of the current is entirely changed and the harmful formation of eddies is avoided through premature deflection. Pressure equalization does not occur between the upper and under sides. This report presents a discussion of the various laws relating to wing design with the conclusion being that lift increases with more acute angles of attack.
Date:
March 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Petroleum Laws of All America
Report issued by the Bureau of Mines covering petroleum laws of the U.S. and surrounding oil producing countries. As stated in the preface, "this bulletin includes the petroleum laws of (1) United States; (2) the several oil-producing States; (3) Canada; (4) Mexico; (5) the Republics of Central and South America" (p. iv).
Date:
March 1921
Creator:
Thompson, Joseph Wesley
Object Type:
Report
System:
The UNT Digital Library
The Rumpler Passenger Airplane
This report details the Rumpler Limousine which was a further development of the well known type 5 A 2. The fuselage, engine, cabin, wings, controls, and landing gear are all discussed.
Date:
March 1921
Creator:
Langsdorff, Werner v.
Object Type:
Report
System:
The UNT Digital Library
Development of Aeronautical Engines by the Army and Navy
Different aircraft engines are categorized as being of interest to only the Army or Navy or to both armed services. A listing of the different engines is presented along with some statistics, namely, horsepower.
Date:
March 3, 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Aeronautic Insurance
The problem of insuring the emerging commercial aeronautic industry is detailed. The author also motes that a complete solution cannot be obtained until the necessary statistics are compiled.
Date:
March 1922
Creator:
Neal, Erik
Object Type:
Report
System:
The UNT Digital Library
Bagnulo Heavy Fuel Internal Combustion Engine and Its Employment in Aviation
We see with great satisfaction that Bagnulo's studies and experiments on his high-speed, heavy-fuel engines, promise to solve not only the general problem of economical power and hence of thermal efficiency, but also all other special problems, of weight and space, and, what is still more important, range of error.
Date:
March 1922
Creator:
Fiore, Amedeo
Object Type:
Report
System:
The UNT Digital Library
The Choice of the Speed of an Airship
The favorable speed of an airship is chiefly determined by the condition of the consumption of the least amount of fuel per unit of traveled distance, although other conditions come into play. The resulting rules depend on the character of the wind and on the variability of the efficiency of the engine propeller units. This investigation resulted in the following rules. 1) Always keep the absolute course and steer at such an angle with reference to it as to neutralize the side wind. 2) In a strong contrary wind, take a speed one and one half times the velocity of the wind. 3) As a general rule, take the velocity of the wind and the velocity of the course component of the wind. Add them together if the wind has a contrary component, but subtract them from each other if the wind has a favorable component.
Date:
March 1922
Creator:
Munk, Max M.
Object Type:
Report
System:
The UNT Digital Library
Communications and Beacons on Air Routes
Different systems of navigations beacons are discussed with an emphasis on radiotelegraphy and radiotelephony.
Date:
March 1922
Creator:
Franck
Object Type:
Report
System:
The UNT Digital Library
Differential Equations in Airplane Mechanics
In the following report, we will first draw some conclusions of purely theoretical interest, from the general equations of motion. At the end, we will consider the motion of an airplane, with the engine dead and with the assumption that the angle of attack remains constant. Thus we arrive at a simple result, which can be rendered practically utilizable for determining the trajectory of an airplane descending at a constant steering angle.
Date:
March 1922
Creator:
Carleman, M. T.
Object Type:
Report
System:
The UNT Digital Library
Drilling and Dustiness of Metal-Mine Air
Report issued by the U.S. Bureau of Mines on the air quality in metal-mines after using wet drills. Dust samples are collected and compared to samples collected from similar metal-mines in South Africa and Australia. This report includes tables.
Date:
March 1922
Creator:
Harrington, D.
Object Type:
Report
System:
The UNT Digital Library
Hydrostatic Test of an Airship Model
An airship model made by the Goodyear Rubber Company was filled with water and suspended from a beam. The deformations of the envelope were studied under the following conditions: 1) both ballonets empty; 2) forward ballonets filled with air; 3) rear ballonets filled with air; and 4) both ballonets filled with air. Photographs were taken to record the deflections under each of these conditions, and a study was made to determine the minimum head of water necessary to maintain the longitudinal axis of the envelope under these conditions. It was concluded that any pressure sufficient to keep the airship full may be used. It appears that a pressure of one inch of water would provide a suitable factor of safety, and therefore it is the pressure that is recommended.
Date:
March 1922
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Maps and Navigation Methods
Different maps and scales are discussed with particular emphasis on their use in aviation. The author makes the observation that current navigation methods are slow and dangerous and should be replaced by scientific methods of navigation based on loxodromy and the use of the compass.
Date:
March 1922
Creator:
Duval, A.
Object Type:
Report
System:
The UNT Digital Library
New Data on the Laws of Fluid Resistance
Thus far, all attempts at the quantitative determination of drag, on the basis of the theory of viscous fluids, have met with but slight success. For this reason, whenever a more accurate knowledge of the drag is desirable, it must be determined by experiment. Here, a few experimental results are given on the drag of a cylinder exposed to a stream of air at right angles to its axis. It is shown that the drag depends on the absolute dimensions of the body and the velocity and viscosity of the fluid in a much more complex manner than has heretofore been supposed.
Date:
March 1922
Creator:
Wieselsberger, C.
Object Type:
Report
System:
The UNT Digital Library