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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Technical Memorandums
 Collection: National Advisory Committee for Aeronautics Collection
The art of writing scientific reports

The art of writing scientific reports

Date: March 1, 1921
Creator: Norton, F H
Description: As the purpose of the report is to transmit as smoothly and as easily as possible, certain facts and ideas, to the average person likely to read it, it should be written in a full and simple enough manner to be comprehended by the least tutored, and still not be boring to the more learned readers.
Contributing Partner: UNT Libraries Government Documents Department
The Goebel rotary engine

The Goebel rotary engine

Date: March 1, 1921
Creator: unknown
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.
Contributing Partner: UNT Libraries Government Documents Department
The law relating to air currents

The law relating to air currents

Date: March 1, 1921
Creator: unknown
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.
Contributing Partner: UNT Libraries Government Documents Department
The Rumpler passenger airplane

The Rumpler passenger airplane

Date: March 1, 1921
Creator: Langsdorff, Werner V
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.
Contributing Partner: UNT Libraries Government Documents Department
Development of aeronautical engines by the Army and Navy

Development of aeronautical engines by the Army and Navy

Date: March 3, 1921
Creator: unknown
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.
Contributing Partner: UNT Libraries Government Documents Department
The coupling of engines

The coupling of engines

Date: April 1, 1921
Creator: Boccaccio, Paul
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.
Contributing Partner: UNT Libraries Government Documents Department
On the definition of the standard atmosphere

On the definition of the standard atmosphere

Date: April 1, 1921
Creator: Grimault, P
Description: On April 15, 1920, the under Secretary of State for Aeronautics and Aerial Transport decided to adopt as Standard Atmosphere for official airplane tests in France, the atmosphere defined by the following law, known as the Law of the S.T.You.(Technical Section of Aeronautics): From 0 to 11,000 m. - 0=15-0.0065 Z and above 11,000 m. - 0= -56.5 degrees being the temperature in centigrade degrees at altitude Z expressed in meters. For altitude 0 the pressure is 760 mm of mercury. In the magazine "L'Aeronautique" Mr. A. Toussaint has already written at length on the first studies which led to the elaboration of this law. Since that time the results obtained have been confirmed by fuller and more abundant data which have justified the official adoption of the Law of the S.T. You. The object of the present article is to give a summary exposition and discussion of the ideas and documents which form the basis of the question.
Contributing Partner: UNT Libraries Government Documents Department
Rates for flights organized by the state

Rates for flights organized by the state

Date: April 1, 1921
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

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

Date: April 1, 1921
Creator: Rateau, A
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.
Contributing Partner: UNT Libraries Government Documents Department
Sixth meeting of the members of the German Scientific Association for Aeronautics

Sixth meeting of the members of the German Scientific Association for Aeronautics

Date: April 1, 1921
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department