Collection
Country
70 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
70
next
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
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
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
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
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
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
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
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
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
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
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
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
Coupling.
Patent for improvements to couplings for windmills specifically "for use in connecting the pump rod to the reciprocal rod of the windmill, so as to permit reciprocation of the wind mill rod independently of movement of the pump rod, and which also will permit the relatively quick and easy change from windmill power to engine power, such as gasolene engine or the like, for pumping water from wells" (lines 9-17) including instructions and illustrations.
Date:
March 29, 1921
Creator:
Regenier, John G.
Object Type:
Patent
System:
The Portal to Texas History
Cotton-Harvester
Patent for a cotton harvester "with an improved arrangement of combined gathering and picking arms" (lines 12-13) to more effectively obtain the cotton bolls (i.e. balls), including illustrations.
Date:
March 29, 1921
Creator:
Stanton, John T.
Object Type:
Patent
System:
The Portal to Texas History
Calk Attachment For Horseshoes
Patent for new and useful improvements in calk attachments for horseshoes. The objective is to provide detachable means applicable to the conventional types of shoe without any modifications.
Date:
March 29, 1921
Creator:
Douglas, John Davies
Object Type:
Patent
System:
The Portal to Texas History
Attachment For Internal-Combustion Motors
Patent for improvements in attachments for internal- combustion motors. The invention is about new and useful improvements to a specific attachment. The two stated objectives are to provide a device adapted for application to the intake pipe on an internal combustion motor and to provide a device which may be locked in a closed position, thereby preventing theft.
Date:
March 29, 1921
Creator:
Thomas, James Clarence
Object Type:
Patent
System:
The Portal to Texas History
Method and Composition for Reclaiming Gummer and Linter Files.
Patent of the methods and compositions for reclaiming Gummer and Linter Files. The invention is used to reclaim the files used in sharpening linter saws that are used in cutting lint from cotton seed after the long fiber has been removed from the seed. This invention ensured cost effective reclaiming of the files instead of their reformation.
Date:
March 22, 1921
Creator:
Lockett, Landon J.
Object Type:
Patent
System:
The Portal to Texas History
Lubricator.
Patent for new and improved lubricator. The invention is connected to lubricators used in earth boring drills for deep well drilling.
Date:
March 29, 1921
Creator:
Scott, Floyd L.
Object Type:
Patent
System:
The Portal to Texas History
Roller-Distributer.
Patent for a new and useful roller-distributer of the sort used on a light and relatively inexpensive automobile of widely known construction.
Date:
March 22, 1921
Creator:
Lopez, Jesus M.
Object Type:
Patent
System:
The Portal to Texas History
Clothes-Rack
Patent for Clothes Rack. This helps dry clothes indoors when the weather is bad outside.
Date:
March 22, 1921
Creator:
Wells, Lillie Bell
Object Type:
Patent
System:
The Portal to Texas History
Automatic-Cut-Off
Patent for an automatic cut-off part for a steam inlet pipe.
Date:
March 1, 1921
Creator:
La Bauve, William H.
Object Type:
Patent
System:
The Portal to Texas History
Cleaning Device
Patent for a cleaning tool that attaches to the windshields of automobile windows to clean snow, rain, and dust. It is operated from the interior of the car and can be easily attached and removed. Includes illustrations.
Date:
March 29, 1921
Creator:
Rivers, Charles A. & Stuart, Francis B.
Object Type:
Patent
System:
The Portal to Texas History
Burglar-Alarm
Patent for improvements in burglar alarms, with horns and sirens.
Date:
March 8, 1921
Creator:
Sefcik, Francis
Object Type:
Patent
System:
The Portal to Texas History
Bale-Tie Buckle
Patent for new and valuable improvements on bale-tie buckles for cotton bales. This relates to buckles securing ties on cotton bales and minimize injury to the persons handling the cotton.
Date:
March 22, 1921
Creator:
McFarland, Frank Hays
Object Type:
Patent
System:
The Portal to Texas History