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Measurement of Visibility From the Pilot's Cockpit on Different Airplane Types

Description: A process for the measurement of the visibility of airplanes from the pilot's cockpit is developed. The apparatus necessary for the measurements was suitably constructed and measurements of the fields of vision were made with it. The visibilities of six airplanes of different types of construction and use were measured, as well as the visibility of an automobile for comparison. An attempt was made to establish minimum visibility requirements and to express the excellence of visibility by means of a numerical coefficient.
Date: November 1931
Creator: Kurz, Gerhard
Partner: UNT Libraries Government Documents Department

Researches on Direct Injection in Internal-Combustion Engines

Description: Report presenting a solution for reducing the fatigue of the Diesel engine by permitting the preservation of its components and, at the same time, raising its specific horsepower to a par with that of carburetor engines, while maintaining for the Diesel engine its perogative of burning heavy fuel under optimum economical conditions. The feeding of Diesel engines by injection pumps actuated by engine compression achieves the required high speeds of injection readily and permits rigorous control of the combustible charge introduced into each cylinder and of the peak pressure in the resultant cycle.
Date: November 1941
Creator: Tuscher, Jean E.
Partner: UNT Libraries Government Documents Department

Research and Design Problems Introduced by Increased Power Output

Description: In what follows the question of the number and geometrical arrangement of the cylinders so important in the design of high performance power units will be considered from various points of view. A discussion will be given of the possibilities of the various working processes and an investigation will be made of possible means for improving the continuous operation and take-off performance, particularly the methods of supercharging, increasing the r.p.m., and employing the two-stroke-cycle engine. Finally, the question of lowered fuel consumption will be gone over briefly.
Date: October 1937
Creator: Kurtz, Oskar
Partner: UNT Libraries Government Documents Department

Report on Ice Formation on Aircraft

Description: The physical phenomena involved in the icing of aircraft have been analyzed and measured. Recommendations on warning devices are made as well as the different types of ice and glazing that can occur on airplanes are examined and discussed.
Date: November 1939
Partner: UNT Libraries Government Documents Department

Results of Recent Experiments With Slotted Wings

Description: This report gives the results of a recent series of experiments performed on a wing designed for a cantilever monoplane. Both wings were trapezial in their ground plan, with their tips rounded elliptically. These wing sections combine all known devices for increasing the lift, namely, the slot, the increased camber and angle of attack by means of an aileron running the whole length of the span.
Date: January 1925
Creator: Lachmann, G.
Partner: UNT Libraries Government Documents Department

Results of Extended Tests of the Focke-Wulf F 19a "Ente," a Tail-First Airplane

Description: These investigations consisted chiefly of measurements of the take-off distance under various starting conditions and with the c.g. in different positions; of the climbing speed as a function of the impact pressure and location of the c.g.; of the longitudinal stability and fore-and-aft controllability and of the determination of the elevator forces and characteristics of the elevator control.
Date: September 1933
Creator: Hübner, Walter
Partner: UNT Libraries Government Documents Department

Ignition and Combustion Phenomena in Diesel Engines

Description: Evidences were found that neither gasification nor vaporization of the injected fuel occurs before ignition; also that the hydrogen coefficient has no significance. However the knowledge of the ignition point and of the "time lag" is important. After ignition, the combustion proceeds in a series of reactions, the last of which at least are now known.
Date: October 1928
Creator: Sass, F.
Partner: UNT Libraries Government Documents Department

Ice Formation on Wings

Description: This report makes use of the results obtained in the Gottingen ice tunnel in which the atmospheric conditions are simulated and the process of ice formation photographed. The effect of ice formation is threefold: 1) added weight to the airplane; 2) a change in the lift and drag forces; 3) a change in the stability characteristics.
Date: February 1939
Creator: Ritz, L.
Partner: UNT Libraries Government Documents Department

Ignition Points and Combustion Reactions in Diesel Engines: Part 1

Description: The question of whether the fuel should be adapted to the engine or whether it is possible to improve equipment such as carburetors and engines so that as much of the crude oil as possible may be used without further transformation is examined in this report. Various ignition points and fuel mixtures are investigated in this regard.
Date: October 1928
Creator: Tausz, J. & Schulte, F.
Partner: UNT Libraries Government Documents Department

Illumination of Airways and Landing Fields

Description: Different illumination systems for landing fields are presented which include fixed beacons, signal guns, and light patterns such as T's and crosses. Some of the advantages and disadvantages for each of the lighting patterns are provided.
Date: August 1922
Creator: Stadthagen, Paul
Partner: UNT Libraries Government Documents Department

Propeller Tests on Airplanes

Description: In order to determine the efficiency of a propeller as accurately as possible, its revolution speed, thrust and power absorbed must be measured during flight. Unfortunately, these measurements can only be made with very complicated equipment. To surmount this problem the testers contented themselves with approximate results obtainable in two or three hours of flight.
Date: July 1922
Creator: Senouque, A.
Partner: UNT Libraries Government Documents Department

Propeller Tip Flutter

Description: The present report is limited to a case of tip flutter recognized by experience as being important. It is the case where outside interferences force vibrations upon the propeller. Such interferences may be set up by the engine, or they may be the result of an unsymmetrical field of flow.
Date: September 1932
Creator: Liebers, Fritz
Partner: UNT Libraries Government Documents Department

Provisional Rules for the Inspection of Aircraft Adopted by the French Bureau Veritas

Description: These new regulations are intended to replace those of November 1, 1922, and give the directions to be followed in the supervision of aircraft by the agents of the Aeronautical Section of the Bureau Veritas. The rules consist of four sections: rules regarding an aircraft leaving a repair shop, the objects of quarterly and weekly inspections, and rules regarding the upkeep and repair of airplanes.
Date: September 1924
Partner: UNT Libraries Government Documents Department

Propulsion by Reaction

Description: This report concerns propulsion by means of rockets. The author concerns himself mainly with efficiency of propulsion and he defines and mathematically expresses those efficiencies.
Date: June 1930
Creator: Roy, Maurice
Partner: UNT Libraries Government Documents Department

Resistance of a Plate in Parallel Flow at Low Reynolds Numbers

Description: The present paper gives the results of measurements of the resistance of a plate placed parallel to the flow in the range of Reynolds numbers from 10 to 2300; in this range the resistance deviates from the formula of Blasius. The lower limit of validity of the Blasius formula is determined and also the increase in resistance at the edges parallel to the flow in the case of a plate of finite width.
Date: November 1951
Creator: Janour, Zbynek
Partner: UNT Libraries Government Documents Department

Results of Experiments With Slotted Wings

Description: This report recounts some of the successful experiments conducted in England and Germany on slotted wings and ailerons. Wind tunnel test results are given and examples of aircraft constructed with these new wing components are described.
Date: October 1924
Creator: Lachmann, G.
Partner: UNT Libraries Government Documents Department