Technical Report Archive and Image Library (TRAIL) - Browse

ABOUT BROWSE FEED

Vibrations of aviation engines

Description: Different causes of airplane engine vibration are given as well as devices to measure vibration.
Date: January 1, 1922
Creator: Lagarde, Martinot C
Item Type: Report
Partner: UNT Libraries Government Documents Department

Dependence of propeller efficiency on angle of attack of propeller blade

Description: In order to determine the maximum and the most favorable pitch for a propeller, it was found desirable to investigate the dependence of propeller efficiency on the angle of attack of the propeller blade. The results of a few experiments are given to show that propeller blades conduct themselves just like airplane wings with reference to the dependence of their efficiency on their angle of attack.
Date: January 1, 1921
Creator: Borck, Hermann
Item Type: Report
Partner: UNT Libraries Government Documents Department

Some remarks concerning soaring flight

Description: The publication of the following details is due to the desire of the editor to have the problems of soaring flight treated on the occasion of the Rhone Soaring Flight Contest.
Date: October 1, 1921
Creator: Prandtl, L
Item Type: Report
Partner: UNT Libraries Government Documents Department

A new dynamometer brake

Description: The mechanism here described belongs to the class of dynamometer brake in which the motive power is transformed into heat in the brake itself. This mechanism was invented by the writer for the purpose of measuring forces in which the two factors, torque and speed, vary within broad limits, the mechanism itself being of simple construction and of still simpler operation.
Date: September 1, 1921
Creator: Segre, Marco
Item Type: Report
Partner: UNT Libraries Government Documents Department

On the elementary relation between pitch, slip, and propulsive efficiency

Description: The author examines the current theory on the importance of reducing slip in airplane propellers. The author feels an exaggerated importance is attached to this supposition and feels that the increase in friction by an increase in propeller area or number of revolutions can't be discounted.
Date: July 1, 1920
Creator: Froude, W
Item Type: Report
Partner: UNT Libraries Government Documents Department

The coupling of engines

Description: 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 1, 1921
Creator: Boccaccio, Paul
Item Type: Report
Partner: UNT Libraries Government Documents Department

The Goebel rotary engine

Description: This report presents a table of specifications of the rotary engine and a very brief description of some of the notable features such as the exhaust valves controlled by means of a fixed cam gear.
Date: March 1, 1921
Item Type: Report
Partner: UNT Libraries Government Documents Department

The law relating to air currents

Description: In the subdivided wing section profile, the diagram of the current is entirely changed and the harmful formation of eddies is avoided through premature deflection. Pressure equalization does not occur between the upper and under sides. This report presents a discussion of the various laws relating to wing design with the conclusion being that lift increases with more acute angles of attack.
Date: March 1, 1921
Item Type: Report
Partner: UNT Libraries Government Documents Department

The Oehmichen Peugeot helicopter

Description: The first flights of the Oehmichen helicopter are detailed as well as various aspects of the construction.
Date: January 1, 1921
Item Type: Report
Partner: UNT Libraries Government Documents Department

Calculation of wing spars

Description: The author presents a comparison and combination of the numerical and geometrical determinations of the maximum M, when calculating the maximum bay moment.
Date: August 1, 1921
Creator: Muller-Breslau, H.
Item Type: Report
Partner: UNT Libraries Government Documents Department

Calculation of wing spars

Description: A simplified formula for calculating wing spars is presented.
Date: August 1, 1921
Creator: Ratzersdorfer, Julius
Item Type: Report
Partner: UNT Libraries Government Documents Department

Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

Description: 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 1, 1921
Creator: Rateau, A
Item Type: Report
Partner: UNT Libraries Government Documents Department

Recent developments in light alloys

Description: This report is intended to cover the progress that has been made in both the manufacture and utility of light alloys in the United States since the first part of 1919. Duralumin is extensively discussed both as to manufacture and durability.
Date: November 1, 1920
Creator: Woodward, R W
Item Type: Report
Partner: UNT Libraries Government Documents Department

The Rumpler passenger airplane

Description: This report details the Rumpler Limousine which was a further development of the well known type 5 A 2. The fuselage, engine, cabin, wings, controls, and landing gear are all discussed.
Date: March 1, 1921
Creator: Langsdorff, Werner V
Item Type: Report
Partner: UNT Libraries Government Documents Department

Development of aeronautical engines by the Army and Navy

Description: Different aircraft engines are categorized as being of interest to only the Army or Navy or to both armed services. A listing of the different engines is presented along with some statistics, namely, horsepower.
Date: March 3, 1921
Item Type: Report
Partner: UNT Libraries Government Documents Department

The technical development of the transport airplane.Report of the Aero-Technical Conference of the Scientific Association for Aeronautics, March 5, 1919

Description: 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 1, 1921
Item Type: Report
Partner: UNT Libraries Government Documents Department

Variable pitch propellers

Description: In this report are described four different types of propellers which appeared at widely separated dates, but which were exhibited together at the last Salon de l'Aeronautique. The four propellers are the Chaviere variable pitch propeller, the variable pitch propeller used on the Clement Bayard dirigible, the variable pitch propeller used on Italian dirigibles, and the Levasseur variable pitch propeller.
Date: November 1, 1920
Item Type: Report
Partner: UNT Libraries Government Documents Department

Study of the resistance offered by propellers rotating on an airstream

Description: 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: January 1, 1921
Creator: Lame, M
Item Type: Report
Partner: UNT Libraries Government Documents Department

Observations on the method of determining the velocity of airships

Description: 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 1, 1921
Creator: Volterra, Vito
Item Type: Report
Partner: UNT Libraries Government Documents Department

Transport airplanes

Description: No Description Available.
Date: April 1, 1921
Creator: Rohbach, A K
Item Type: Report
Partner: UNT Libraries Government Documents Department