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British Certificates of Airworthiness
This report details the rules and regulations for obtaining a British airworthiness certificate. Aircraft loading and construction are especially important.
Date:
May 1921
Creator:
unknown
System:
The UNT Digital Library
Proposed Air Traffic Law
This report presents a brief history of France's attempts to promulgate an internal air traffic law and then provides a draft of proposed national air traffic laws.
Date:
May 1922
Creator:
Ripert, Georges
System:
The UNT Digital Library
Regulation of Air Traffic
The ways in which the international and internal French air traffic accords interact with each other is outlined in this report. The principal questions covered by the present legislation are as follows: 1) Conditions of safety which must be fulfilled by aircraft; 2) Licenses for members of the crew; 3) Traffic rules to be observed by French and foreign aircraft.
Date:
May 1922
Creator:
Devaluez
System:
The UNT Digital Library
Stability of Airplanes
The author attempts to correct the misconception that piloting an airplane requires extraordinary skill and balance. He also tries to show that airplanes are extremely stable in flight. Some of the major points covered in this article include: automatic pilots, airplanes designed to be stable, and the reliance on mathematics to help in designing stable aircraft.
Date:
May 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Aerial Convention of October 13, 1919
The aerial convention delegates are listed as well as the set of rules that were developed during the session.
Date:
May 1922
Creator:
Roper
System:
The UNT Digital Library
Aviation and Insurance
This article considers some of the causes which hinder the development of aircraft insurance. Different risks are discussed as well as the causes of aircraft accidents. Pilot error, poor airdromes, weather conditions, poorly adapted airplanes, and engine failures are all examined and some conclusions are made.
Date:
May 1922
Creator:
Mayo, R. H.
System:
The UNT Digital Library
Air traffic
This report presents a recounting of the steps taken by France to establish national and international regulation over air traffic.
Date:
May 1922
Creator:
Sudre, G.
System:
The UNT Digital Library
Technical Problems of Commercial Flying
The technical requirements for commercial aircraft are listed, which include: safety, economy and comfort. The author lists various methods to increase these requirements in commercial aircraft.
Date:
May 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
The Choice of Air Routes
The author lists rules for the development and planning of air routes. He uses as examples India and Texas, as well as discussing the need for more landing fields.
Date:
May 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Night Flying
Dr. Warner examines the utility and economy of flying at night when flying passengers. Some of the points discussed include lighted landing fields, the possibility of using airships, and the cost of landing fields.
Date:
May 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Mechanical Aids to Flight
This report examines the great utility and safety of using instruments when flying. Instruments can be especially useful in conditions when the pilot has trouble spatially orienting himself.
Date:
May 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Subsidies for Air Transport
This article discusses the need for government subsidies to encourage the development of passenger and freight transport by air.
Date:
1922-05?
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Air-Flow Experiments
This report describes the apparatus used to take air-flow photographs. The photographs show chiefly the spiral course of the lines of flow near the tip of the wing. They constitute therefore a visual presentation of the phenomena covered by airfoil theory.
Date:
May 1924
Creator:
Wieselsberger, C.
System:
The UNT Digital Library
Light Airplanes Which Participated in Contest at Lympne, England, October, 1923
"The purpose of this memorandum is to present in a concise form a description, with drawings, of the most practical light airplanes participating in the meet at Lympne, England, in October, 1923. Features, which are particularly suitable for this type of aircraft, are described and a special reference is made to achievements which indicate progress and possibilities both from a commercial and a military point of view" (p. 1).
Date:
May 1924
Creator:
unknown
System:
The UNT Digital Library
Flow of Gas Through Turbine Lattices
This report is concerned with fluid mechanics of two-dimensional cascades, particularly turbine cascades. Methods of solving the incompressible ideal flow in cascades are presented. The causes and the order of magnitude of the two-dimensional losses at subsonic velocities are discussed. Methods are presented for estimating the flow and losses at high subsonic velocities. Transonic and supersonic flows in lattices are then analyzed. Some three-dimensional features of the flow in turbines are noted.
Date:
May 1956
Creator:
Deich, M. E.
System:
The UNT Digital Library
A Method of Quadrature for Calculation of the Laminar and Turbulent Boundary Layer in Case of Plane and Rotationally Symmetrical Flow
"For calculation of the characteristic parameters of the boundary layer (momentum-loss thickness and form parameter for the velocity profile), two quadrature formulas are given which are valid for the laminar as well as for the turbulent state of flow. These formulas cover both the two-dimensional and the rotationally symmetrical case. The calculation of the momentum-loss thickness is carried out by a simple integration of the energy theorem" (p. 1).
Date:
May 1955
Creator:
Truckenbrodt, E.
System:
The UNT Digital Library
On the Theory of Unsteady Planing and the Motion of a Wing With Vortex Separation
The disturbance imparted to water by a planing body give rise to a wave form of motion on the free surface, the length of the waves increasing indefinitely with increase in the Froude number and being directly proportional to the latter in the case of the plane or two-dimensional problem. At large Froude numbers the effect of the weight shows up to any appreciable extent only at some distance from the body, so that the flow near the body can be considered as part of a flow of an infinitely extending weightless fluid. This paper is a consideration of these characteristics as well as a formulation of the planing problem and its relation to the problem of a thin wing.
Date:
May 1940
Creator:
Sedov, L.
System:
The UNT Digital Library
Some Data on the Static Longitudinal Stability and Control of Airplanes: Design of Control Surfaces
In the solution of a number of problems on the stability and controllability of airplanes, there arises the necessity for knowing the characteristics of the tail surfaces of the types in common use today. Of those characteristics, the most important are the effectiveness and hinge moments of the tail surfaces. As has been shown in the present paper, there exists the possibility of determining these characteristics by the formulas obtained with a degree of accuracy sufficient for the purposes of preliminary computation.
Date:
May 1940
Creator:
Martinov, A. & Kolosov, E.
System:
The UNT Digital Library
High-Speed Aircraft
This report details the designs of high-speed aircraft from various countries from 1931 on, with special emphasis on the United States and Germany.
Date:
May 1934
Creator:
Schrenk, M.
System:
The UNT Digital Library
Torsional Stresses in Box Beams With Cross Sections Partially Restrained Against Warping
"The present report gives a method for computing the torsion of boxes with thin shear-resistant or simply tension-resistant walls under any torsional load, support and dimension. The final stress condition is developed from that of a principal system with unconstrained sectional warping corresponding to Bredt's formula and an additional stress condition due to constrained cross-sectional warping. This is computed by means of the deflection condition of the principal system from a statically indeterminate calculation" (p. 1).
Date:
May 1934
Creator:
Ebner, Hans
System:
The UNT Digital Library
Dynamic Similitude in Internal-Combustion Engines
In this report it will be seen that the piston speed - as, moreover, any other speed, such as bearing velocity - must be independent of the quantity dimensions and must be a representative quantity similar to the high speed and the specific weight per horsepower.
Date:
May 1941
Creator:
Lutz, O.
System:
The UNT Digital Library
Heat Transfer in Geometrically Similar Cylinders
The power and heat-stress conditions of geometrically similar engines are discussed. The advantages accruing from smaller cylinder dimensions are higher specific horsepower, lower weight per horsepower, lower piston temperature, and less frontal area, with reduced detonation tendency.
Date:
May 1941
Creator:
Riekert, P. & Held, A.
System:
The UNT Digital Library
Present and future problems of airplane propulsion
Some of the problems considered in this report include: thermodynamics of surface friction, application of thick wing sections, special applications of controllable propellers, and gas turbines for aircraft.
Date:
May 1941
Creator:
Ackeret, J.
System:
The UNT Digital Library
Hydrodynamic Tests of Models of Seaplane Floats
"This report contains the results of tank tests carried out at free trim on seventeen hulls and floats of various types. The data as to the weight on water, trim, and relative resistance for each model are plotted nondimensionally and are referenced both to the total weight and to the weight on water. Despite the fact that the experiments were not made systematically, a study of the models and of the test data permits nevertheless some general deductions regarding the forms of floats and their resistance" (p. 1).
Date:
May 1935
Creator:
Eula, Antonio
System:
The UNT Digital Library