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The World's Air Transportation Services: Data as to Passengers, Mail, and Goods Carried by American and European Transportation Services
This report presents detailed descriptions, statistics, and graphs on European and American air transport. The European countries listed are Belgium, Czecho-Slovakia, Denmark, France, Germany, Great Britain, Holland, and Italy.
Date:
June 1922
Creator:
Office of Aeronautical Intelligence
Object Type:
Report
System:
The UNT Digital Library
Lecture on the Rhon soaring flight competition, 1921
This article presents a recounting of the Rhon soaring competition with emphasis on new designs, results, and prizes awarded. A round-robin discussion is also included at the end of the report.
Date:
June 1922
Creator:
Hoff, Wilhelm
Object Type:
Report
System:
The UNT Digital Library
Fakir Fuel Pump
"In designing the Fakir fuel pump, the fundamental idea was to obtain a simple and reliable method of conveying the fuel from a low tank to the carburetor, with the avoidance of the faults of all former methods and the simultaneous warming of the fuel by means of the heat of compression generated. The principle of the Fakir fuel pump rests on the well-known principle of the diaphragm pump, which must be suitably adapted to the present purpose" (p. 1).
Date:
June 1922
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Engine Pistons of Light Metal
This report presents the results of testing 32 sets of light metal pistons from 16 different aluminum and magnesium alloys, 2 sets of cast iron pistons, and one piston of pure electrolytic copper. The many-fold mutual relations between material properties, shape, thermic and dynamic processes in the engine were clarified by comprehensive technical, thermic, chemical, physical and metallographic investigations of pistons and piston materials.
Date:
June 1922
Creator:
Becker, G.
Object Type:
Report
System:
The UNT Digital Library
Effect of Structure in Middle Part of Leading Edge of a Thick Wing: Communication From Rijks-Studiedienst Voor De Luchtvaart of Amsterdam
The experiments herein described were made for the purpose of finding whether removing a larger portion of the wing to improve the pilot's view would be possible, without too great detriment to the aerodynamic properties of the airplane. The experiments were conducted on a wing similar to the Fokker F III.
Date:
June 1922
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Problem of the Slotted Wing: A Communication From the Aerodynamic Institute of the Aachen Technical High School
"It is to be expected that the advantageous properties, hitherto discovered in many slotted wing sections, depend very largely on the contour of the slot and the structural details of the wing. It is therefore of interest, aside from measurements on wings of constant cross-section along the span, to measure also wing models in which the structural details have already been given practical consideration" (p. 1).
Date:
June 1922
Creator:
Klemperer, W.
Object Type:
Report
System:
The UNT Digital Library
The R-38 Catastrophe and the Mechanics of Rigid Airship Construction
An airship frame may be regarded as a rigid girder subjected to a number of forces which, according to their nature, may be classified as follows: weight or loads (force of gravity); lifting forces (aero-static); accelerations (dynamic). These forces must be in equilibrium in the three most important cases during flight: 1) when the airship is floating (aerostatic problem); 2) when flying without acceleration (aerodynamic problem). 3) When under the influence of any accelerating force (dynamic problem). This report will briefly discuss each of these cases in regard to the R-38 airship accident.
Date:
June 1922
Creator:
Herrera, Emilio
Object Type:
Report
System:
The UNT Digital Library
Comfort in Flight
Some advances in passenger comfort are discussed, namely, ventilated cabins, heating, seating arrangements, and doors.
Date:
June 1922
Creator:
Warner, Edward P.
Object Type:
Report
System:
The UNT Digital Library
The Prospects of the Helicopter
The advantages of helicopters are listed along with a discussion of safety devices, the problems of control, and the need for horizontal flight.
Date:
June 1922
Creator:
Warner, Edward P.
Object Type:
Report
System:
The UNT Digital Library
On the Three-Dimensional Instability of Laminar Boundary Layers on Concave Walls
Memorandum presenting a study of the stability of laminar boundary layer profiles on slightly curved walls relative to small disturbances, in the shape of vortices, whose axes are parallel to the principal direction of flow. The result in an eigenvalue problem by which, for a given undisturbed flow at a prescribed wall, the amplification or decay is computed for each Reynolds number and each vortex thickness.
Date:
June 1954
Creator:
Görtler, H.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Observations on the Method of Determining the Velocity of Airships
To obtain the absolute velocity of an airship by knowing the speed at which two routes are covered, we have only to determine the geographical direction of the routes which we locate from a map, and the angles of routes as given by the compass, after correcting for the variation (the algebraical sum of the local magnetic declination and the deviation).
Date:
June 1921
Creator:
Volterra, Vito
Object Type:
Report
System:
The UNT Digital Library
The Dynamometer Hub and the Flywheel of the Engine
Report presenting a description of the interaction between the dynamometer hub and the flywheel of the engine in aircraft. The negative rotary moments in propellers generally allow for the cessation of one cylinder without any lifting on the part of the propeller, and without depriving the engine of its flywheel.
Date:
June 1921
Creator:
Everling, E.
Object Type:
Report
System:
The UNT Digital Library
Simple Means for Saving Fuel on Traffic Flights
Report presenting a discussion of ways to save fuel on traffic flights, including some calculations that can be used for determining fuel efficiency. The primary ways of lessening fuel consumption include flying with a throttled engine and diminished speed.
Date:
June 1921
Creator:
Kook, E.
Object Type:
Report
System:
The UNT Digital Library
Flexibility of Bearing Surfaces and Stress on Fabrics
Report presenting an investigation of the flexibility of bearing surfaces and stress on fabrics used in wings. Equations are given for calculating some of these loading factors.
Date:
June 1921
Creator:
Pröll, A.
Object Type:
Report
System:
The UNT Digital Library
Theoretical Investigation of Drag Reduction in Maintaining the Laminar Boundary Layer by Suction
"Maintenance of a laminar boundary layer by suction was suggested recently to decrease the friction drag of an immersed body, in particular an airfoil section. The present treatise makes a theoretical contribution to this question in which, for several cases of suction and blowing, the stability of the laminar velocity profile is investigated. Estimates of the minimum suction quantities for maintaining the laminar boundary layer and estimates of drag reduction are thereby obtained" (p. 1).
Date:
June 1947
Creator:
Ulrich, A.
Object Type:
Report
System:
The UNT Digital Library
Investigation of an Afterburning Ramjet Using Gaseous Hydrogen as Fuel at Mach Number of 3.0
Memorandum presenting an investigation conducted in the supersonic wind tunnel on a 16-inch ramjet that was equipped with an afterburner and used gaseous hydrogen for both the primary and afterburner fuels. The primary nozzle had a contraction ratio of 0.6 while the exit nozzle had a contraction ratio of 0.9. Data were obtained at a free-stream Mach number of 3.0 and zero angle of attack.
Date:
June 17, 1957
Creator:
Wasserbauer, Joseph F.
Object Type:
Report
System:
The UNT Digital Library
A Method for the Instantaneous Determination of the Velocity and Direction of the Wind
The laboratory instruments, which we often constructed with makeshift means, gave encouraging results and showed that they could satisfactorily meet the required conditions. By limiting ourselves to the employment of hot wires of 0.05 mm (0.002 in.) diameter, we obtained instruments which faithfully followed all the wind fluctuations of over 0.1 second and even much more rapid variations without any very great error.
Date:
June 1924
Creator:
Huguenard, E.; Magnan, A. & Planiol, A.
Object Type:
Report
System:
The UNT Digital Library
Development of Wing-Steered Messerschmitt Gliders
The present article is a brief report on the development and testing of the Messerschmidt glider that set a duration record of 21 minutes. Its most conspicuous characteristic was the placing of the steering gear entirely inside the fuselage and wings.
Date:
June 1924
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Air Forces Exerted on Streamlined Bodies with Round or Square Cross- Sections, When Placed Obliquely to the Airstream
"The question of behavior of a streamlined body with round or square cross-sections is of importance in determining the shape to give an airplane fuselage. It is our task here to show how the lift and drag are affected, with the object placed obliquely to the air stream" (p. 1).
Date:
June 1924
Creator:
Wieselsberger, C.
Object Type:
Report
System:
The UNT Digital Library
The "Navigraph"
"Commander Le Prieur, whose flight experience in a low-speed seaplane we related in our number of September 27, 1924, invented, four years ago, an instrument destined to render very great service to aviators, namely, the "navigraph", designed to correct errors of orientation due to the effect of the winds during flight" (p. 1).
Date:
June 1925
Creator:
Le Prieur, Ives
Object Type:
Report
System:
The UNT Digital Library
Air forces on airfoils moving faster than sound
We are undertaking the task of computing the air forces on a slightly cambered airfoil in the absence of friction and with an infinite aspect ratio. We also assume in advance that the leading edge is very sharp and that its tangent lies in the direction of motion.
Date:
June 1925
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Tests of Lead-Bronze Bearings in the DVL Bearing-Testing Machine
"The lead-bronze bearings tested in the DVL machine have proven themselves very sensitive to load changes as in comparison with bearings of light metal. In order to prevent surface injuries and consequently running interruptions, the increase of the load has to be made in small steps with sufficient run-in time between steps. The absence of lead in the running surface, impurities in the alloy (especially iron) and surface irregularities (pores) decreases the load-carrying capacity of the bearing to two or three times that of the static load" (p. 1).
Date:
June 1940
Creator:
Fischer, G.
Object Type:
Report
System:
The UNT Digital Library
Pressure Recovery for Missiles with Reaction Propulsion at High Supersonic Speeds (The Efficiency of Shock Diffusers)
"The problem of the intake of air is treated for a missile flying at supersonic speeds and of changing the kinetic energy of the air into pressure with the least possible losses. Calculations are carried out concerning the results which can be attained. After a discussion of several preliminary experiments, the practical solution of the problem at hand is indicated by model experiments. The results proved very satisfactory in view of the results which had been attained previously and the values which were anticipated theoretically" (p. 1).
Date:
June 1947
Creator:
Oswatitsch, K.
Object Type:
Report
System:
The UNT Digital Library
Air Transport by Gliders: Some Technical Observations
This short analysis may be useful in determining the real tactical possibilities of "glider trains" and in adopting the course to be followed in possible studies of these questions. In this analysis most prominent are: (a) the power required for the train in level flight; (b) its speed; (c) climb; and (d) the type of airplane best suited for towing as well as design requirements for transport gliders.
Date:
June 1941
Creator:
Stepniewski, Wieslaw
Object Type:
Report
System:
The UNT Digital Library