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Aerial navigation : on the problem of guiding aircraft in a fog or by night when there is no visibility
Report discussing the use of magnetic fields and wire to navigate aircraft in conditions of poor visibility is presented. This field may be considered to be derived from a double lemniscate, considered in the particular case where the origin is a double point formed from the magnetic field of the slack wire, from the field produced by the return currents and from the field due to the currents induced in the conducting mass. These fields are dephased in two ways, one in the direction of the wire, the other in a direction perpendicular to it.
Date:
January 1922
Creator:
Loth, William
System:
The UNT Digital Library
Airplane Speeds of the Future
While the reliability of predictions is poor the author still attempts to gauge the future speeds of airplanes.
Date:
January 1923
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Behavior of Aviation Engines at Different Air Densities
The author expresses his views that engine performance would be affected only at very low temperatures is presented in this report.
Date:
January 1922
Creator:
Schwager, O.
System:
The UNT Digital Library
Behm Acoustic Sounder for Aircraft
The Behm acoustic sounder for aircraft enables the barometric determination for the altitude by night or fog and therefore promises to prove of great importance in safeguarding air traffic.
Date:
January 1926
Creator:
unknown
System:
The UNT Digital Library
Calculation of Tubular Radiators of the Automobile Type
"We propose to show how to calculate the cooling capacity of all radiators through which the air flows in separate streamlets, whether enclosed in actual tubes or not and whatever cross-sectional shape the tubes may have. The first part will give the fundamental principles for calculating velocity of air in the tubes and the heat exchange by radiation, conduction and convection, and show, by examples, the agreement of the calculation with experiments. In the second part, the effect of the dimensions and conditions of operation on the heat exchange will be systematically investigated" (p. 1).
Date:
January 1926
Creator:
Richter, L.
System:
The UNT Digital Library
Crank Case Scavenging of a Two-Stroke-Cycle Engine
"Experiments with a two-stroke-cycle, crank case scavenging engine. Effect of systematic variation of the height of the scavenge and exhaust ports on the scavenging, as determined by gas analysis. The best results were obtained under conditions differing from the usual ones" (p. 1).
Date:
January 1928
Creator:
Holm, Otto
System:
The UNT Digital Library
Determination of Ignition Points of Liquid Fuels Under Pressure
Two series of experiments were tried, in order to determine the ignition point at any desired pressure, the first series at constant and the second at varying pressure. The results differ greatly and indicate that testing under pressure, in the investigation of liquid fuels, can be done best in the laboratory and that the determination of the ignition points in an open vessel furnishes no certain indication of the behavior of the fuel in the engine.
Date:
January 1925
Creator:
Tausz, J. & Schulte, F.
System:
The UNT Digital Library
Determining the Efficiency of Atomization by Its Fineness and Uniformity
Different methods of determining the size of fuel droplets in the atomization process are presented. The distribution of those drops is also presented in graphic form.
Date:
January 1927
Creator:
Sauter, J.
System:
The UNT Digital Library
Device for the Automatic Control of Airplanes
This report provides a description of an automatic control mechanism that consists of an automatic elevator control, aileron control, and a rudder control. Each automatic control can be independently switched on or off.
Date:
January 1929
Creator:
Gradenwitz, Alfred
System:
The UNT Digital Library
Effect of Oxygen on the Ignition of Liquid Fuels
The ignition temperature, ignition lag, and ignition strength of simple and homogeneous fuels in combustion air of small oxygen content differ from what they are in air of greater oxygen content. In the case of small oxygen content, these fuels behave as if mixed unevenly. In the case of air with a definite oxygen content, the simple fuels have two ignition points, between which ignition takes place within a certain temperature range. The phenomena are explained by pyrogenous decomposition, comparison of the individual heat quantities, and the effect of the walls.
Date:
January 1929
Creator:
Pahl, H.
System:
The UNT Digital Library
Experimental Determination of Pressure Drop Caused by Wire Gauze in an Air Stream
"For several kinds of wire gauze the difference in static, dynamic and total or absolute pressure in front of and behind the gauze were determined for comparison with the pressure drop caused by an airplane radiator, such gauze being used on airplane models to represent the radiator" (p. 1).
Date:
January 1925
Creator:
unknown
System:
The UNT Digital Library
Fluttering of the Tail Surfaces of an Airplane and the Means for Its Prevention
The present article, which constitutes a continuation of the work of Von Baumhauer and Konig, will therefore be restricted to the fluttering of the tail surfaces and especially to oscillations of the horizontal empennage. This will also illustrate the characteristics of all other phenomena of fluttering.
Date:
January 1929
Creator:
Scheubel, F. N.
System:
The UNT Digital Library
The Glider of the College Aviation Group of the Technical High School, Hanover
This report presents the results of testing on a glider designed and built by the College Aviation Group. The design and construction were based on the following principles: 1) the glider will be made to descend as slowly as possible; 2) rigidity and resistance were arranged to meet the conditions of varied loads; 3) construction is as simple as possible; 4) and great ease in assembling and dismounting have been sought.
Date:
January 1922
Creator:
Blume, W.
System:
The UNT Digital Library
Hulls for Large Seaplanes
"In reality, the principle of similitude is not applicable to the hulls, the designing of which increases in difficulty with increasing size of the seaplanes. In order to formulate, at least in a general way, the basic principles of calculation, we must first summarize the essential characteristics of a hull with reference to its gradual enlargement. In this study, we will disregard hulls with wing stubs, as being inapplicable to large seaplanes" (p. 2).
Date:
January 1925
Creator:
Magaldi, Giulio
System:
The UNT Digital Library
Investigations of Aviation Accidents and Lessons to Be Drawn From Them
Similarities in the study of aviation accidents in different countries are made as well as statistics on the causes of those accidents.
Date:
January 1924
Creator:
Devaluez, F.
System:
The UNT Digital Library
List of Commercial Aircraft Belonging to the Various French Air Navigation Companies as of August 31st, 1922
Report consisting of a list of aircraft belonging to different French aircraft companies.
Date:
January 1923
Creator:
unknown
System:
The UNT Digital Library
Marcel Besson Wing Sections
Three different Marcel Besson airfoils are investigated in terms of maximum lift, maximum fineness, minimum required power, and wing section drag. Comparisons are then made between the three airfoils.
Date:
January 1923
Creator:
Delanghe, C.
System:
The UNT Digital Library
Mechanical properties of some materials used in airplane construction
Since lightness is desirable in airplane construction, greater stresses must be tolerated than in other kinds of construction. It is therefore necessary to have a more accurate knowledge of the greatest stresses that may occur and of the actual properties of the materials used. The Aeronautic Research Laboratories took the limit of elasticity as the basis of the strength calculations. Many tests were made of different steels, woods, aluminum alloys, and fabrics.
Date:
January 1928
Creator:
Wolff, E. B. & Van Ewijk, L. J. G.
System:
The UNT Digital Library
New Lateral Stabilizing Device for Airplanes
"The proposed device tends to render the lateral stabilization of airplanes easier and more efficacious. The proposed solution is to mount the ailerons independently, in such a manner that they can turn freely, under the action of the relative wind, about an axis located in front of the extreme position of the center of the lift" (p. 1).
Date:
January 1921
Creator:
Constantin, Louis
System:
The UNT Digital Library
Photogrammetric Take-Off and Landing Measurements
In order to determine the first part of the flight path a new method is described which requires only one photographic camera.
Date:
January 1929
Creator:
Spieweck, Bruno
System:
The UNT Digital Library
Photographic Time Studies of Airplane Paths
The object of this report is the description of a method which seems to be practicable for determining the path of an airplane, especially in taking off and landing. This report tells how, by means of a camera, preferably a kinetograph, which simultaneously photographs a stop watch the distance of an airplane from the camera and its height above the ground can be determined.
Date:
January 1926
Creator:
Von Baumhauer, A. G.
System:
The UNT Digital Library
Possible Improvements in Gasoline Engines
High-compression engines are investigated with the three main objects being elimination of vibration, increase of maximum efficiency, and conservation of this efficiency at the highest possible speeds.
Date:
January 1923
Creator:
Ziembinski, S.
System:
The UNT Digital Library
Recent Progress in the Theory of Air Flow as Applied to Aeronautics
In summing up it may be said that the hydrodynamic theories are best confirmed by experimental results for bodies with small resistance or drag and can accordingly be used in place of experimental tests.
Date:
January 1922
Creator:
Prandtl, L.
System:
The UNT Digital Library
Remarks on Building of Low-Powered Airplanes
"If the low-powered airplane is to be used advantageously by private individuals, the most important consideration is a smaller fuel consumption and, hence, a lower engine power. From experiments with gliders, it appears entirely possible, by utilizing ascending winds (on the weather side of mountains and those generated by the heat of the sun) and by employing engine flight intermittently, as required to fly long distances over land" (p. 1).
Date:
January 1924
Creator:
Langsdorff, Werner v.
System:
The UNT Digital Library