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The Coupling of Engines
This report examines the idea of coupling numerous engines together to turn a single propeller, which the author feels would free aircraft design from the problems of multi-engine and propeller design.
Date:
April 1921
Creator:
Boccaccio, Paul
System:
The UNT Digital Library
Resume of the Theory of Naval and Aerial Propulsive Propellers and of Airplanes in the Rectilinear Flight
Though dissimilar, these two subjects have been united because they have some points in common. The computation of the movement of an airplane can only be correctly established if we are in a position to know exactly the thrust and resisting torque of the propeller for the various values of slip, which may vary greatly according to circumstance. The first part of the work concerns propellers and introduces as a fundamental variable, the true slip (delta) with respect to the effective pitch, which is the advance per revolution of the propeller corresponding to no thrust. The second part deals with characteristic curves of an airplane.
Date:
April 1921
Creator:
Rateau, A.
System:
The UNT Digital Library
Abstracts from the German Technical Press: Rates for Flights Organized by the State
Report presenting tariffs that are written for all aircraft manufacturing companies to follow regarding aircraft orders.
Date:
April 1921
Creator:
United States. National Advisory Committee for Aeronautics.
System:
The UNT Digital Library
The Technical Development of the Transport airplane: Report of the Aero-Technical Conference of the Scientific Association for Aeronautics, March 5, 1919
The abolition of military qualifications gives free scope to new technical possibilities in the development of transport airplanes. This report notes the various considerations that must be made when designing aircraft to meet the needs of commercial passengers. Comfort and safety must be emphasized.
Date:
April 1921
Creator:
unknown
System:
The UNT Digital Library
Sixth Meeting of the Members of the German Scientific Association for Aeronautics
Report presenting a description of a meeting of the German Scientific Association for Aeronautics. The topics that were discussed are described.
Date:
April 1921
Creator:
unknown
System:
The UNT Digital Library
Study of the Resistance Offered by Propellers Rotating on an Airstream
This report presents a series of tests conducted to verify the formula for thrust P = q(exp 2) D(exp 2) V(exp 2), where P represents thrust, V the velocity of the airstream, D the diameter of the propeller, and q the lifting quality of a comparative propeller which is called the conjugate propeller.
Date:
April 1921
Creator:
Lame, M.
System:
The UNT Digital Library
Extracts from the German Technical Process. Transport Airplanes.
Report presenting a description of the transition stage of airplanes and how it will change with new developments in aircraft design. The details of the debate between centralized or decentralized installation are also provided, including some of the pros and cons of each.
Date:
April 1921
Creator:
Rohrbach, A. K.
System:
The UNT Digital Library
Systematic Wind-Tunnel Measurements on a Laminar Wing With Nose Flap
"Results of measurements are given as a supplement to earlier tests for a laminar profile with nose flap; magnitude, form, and angle of attack of the flap were systematically changed. The experiments were carried out at an effective Reynolds number of 8.2 x 10(exp 5). A comparison with measurements on other profiles shows that the effect of a nose flap is essentially dependent upon magnitude of the nose radius coefficient of the profile" (p. 1).
Date:
April 1947
Creator:
Krueger, W.
System:
The UNT Digital Library
Evolution of Modern Aviation and Experimental and Technical Researches in Aerodynamic Laboratories
The evolution of construction techniques and the use of metal in wings is presented. Drag is discussed along with the fuselage and tail. The interaction of these parts is also investigated.
Date:
April 1922
Creator:
Toussaint, A.
System:
The UNT Digital Library
Wing Resistance Near the Ground
In the present treatise, a convenient method will be indicated, which makes it possible to determine the polar curve of an airplane at short distances from the ground by a simple short calculation, when the polar curve is known for flight in unlimited space.
Date:
April 1922
Creator:
Wieselsberger, C.
System:
The UNT Digital Library
Joukowski Wings
To sum up, Professor Joukowski's theory of supporting wings renders it possible to calculate the coefficient of lift in terms of the angle of attack, and Prandtl's coefficient of induced drag and the correction of the angle of attack in terms of the disposition and aspect ratio of the wings.
Date:
April 1922
Creator:
Margoulis, W.
System:
The UNT Digital Library
Metal Construction
The future development of aerial navigation is closely connected with the condition of obtaining airplanes of great stability and sufficient strength. Different construction materials such as wood, aluminum, iron, and alloys are examined to determine which materials or combination of materials provides a greater coefficient of safety.
Date:
April 1922
Creator:
Verduzio, Rodolfo
System:
The UNT Digital Library
Commercial Airplanes and Seaplanes
This report considers as the dominating characteristic, either the load carried, the speed, the radius of action, the fuel consumption, the activity of transport, or, lastly, the qualities of comfort and safety. The first four factors determine the theoretical efficiency, while the others determine its practical efficiency.
Date:
April 1922
Creator:
Royer, Etienne
System:
The UNT Digital Library
Testing Airplanes in Flight: Determining Position of Resultant of Action of Air and Longitudinal Stability of an Airplane at Different Angles of Attack
"Measurements made during flight with the triple recording device which gives the horizontal and vertical speeds of an airplane and the angle it makes with the horizon, render it possible to calculate its lift, its drag, and R the resultant of the action of the air both in magnitude and direction, but with these data alone, it is impossible to determine the position of this resultant in the plane of symmetry of the airplane. We will also see how we may determine the position of R during flight and then calculate the variations in the stability of an airplane" (p. 1).
Date:
April 1922
Creator:
Senouque, A.
System:
The UNT Digital Library
Irresponsibility Clause in Air Traffic Contracts
This report examines the question of the responsibility of the carrier in air traffic. The French were concerned about the competitive advantage the English companies enjoyed because of differences in their respective laws.
Date:
April 1922
Creator:
Porquet
System:
The UNT Digital Library
Propeller Theory of Professor Joukowski and His Pupils
This report gives a summary of the work done in Russia from 1911 to 1914, by Professor Joukowski and his pupils. This summary will show that these men were the true originators of the theory, which combines the theory of the wing element and of the slipstream.
Date:
April 1922
Creator:
Margoulis, W.
System:
The UNT Digital Library
Influence of Elliptical Distribution of Lift on Strength of Airplane Wings
"Hitherto it has been generally assumed, in calculating the fall of an airplane, that the forces withstood by the latter were distributed uniformly throughout the whole length of the wing. In reality this is not the case and German engineers in particular are now assuming an elliptical distribution of the forces. The latter hypothesis has made it possible to carry out a certain number of calculations which have been verified by experiment" (p. 1).
Date:
April 1922
Creator:
Dorand
System:
The UNT Digital Library
Distribution of Pressure on Fuselage of Airplane Model: Communication From Rijks-Studiedienst Voor De Luchtvaart of Amsterdam
In order to study the distribution of the pressure on the surfaces of a fuselage and the influence of the wing on the air flow along these surfaces, we have made tests pertaining to the bottom and one side. In this particular case, the wing causes an increase in pressure along the sides of the fuselage.
Date:
April 1922
Creator:
unknown
System:
The UNT Digital Library
Test Flight of the Handley Page Torpedo-Carrying Airplane
Memorandum presenting a description of the first flight test of the Handley Page torpedo-carrying airplane.
Date:
April 1922
Creator:
unknown
System:
The UNT Digital Library
Organization and Exploitation of Regular Aerial Transportation Lines
Report presenting a description of the aerial transportation lines in France, including the founding, location, and usage of the lines.
Date:
April 1922
Creator:
Tete, Albert
System:
The UNT Digital Library
Applying the results of experiments on small models in the wind tunnel to the calculation of full-sized aircraft
This report presents the attempt to develop a law which will permit the use of results obtained on small models in a tunnel for the calculation of full-sized airplanes, or if it exists, a law of similitude relating air forces on a full-sized plane to those on a reduced scale model.
Date:
April 1922
Creator:
Robert
System:
The UNT Digital Library
My Experience With Helicopters
The author recounts his experiments with helicopters. The object of his investigations was to remain stationary in the air for five minutes and to make a closed flight at low altitude. Some of the topics discussed include stabilization, horizontal flight, and directional control.
Date:
April 1923
Creator:
Oemichen, Etienne
System:
The UNT Digital Library
Wind-Driven Propellers (Or "Windmills")
Wind-driven propellers are much used as sources of power for equipment such as radios. This report establishes the principles involved and acquaints the reader with rules for design of such windmills.
Date:
April 1923
Creator:
Munk, Max M.
System:
The UNT Digital Library
Wind Tunnel of Zeppelin Airship Company
This report discusses the general considerations for the design of aerodynamic laboratories. The dimensions, construction, and components of the wind tunnel are given special attention.
Date:
April 1923
Creator:
Munk, Max M.
System:
The UNT Digital Library