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 Decade: 1920-1929
 Collection: Technical Report Archive and Image Library
The increase in dimensions of airplanes - weight, area, and loading of wings

The increase in dimensions of airplanes - weight, area, and loading of wings

Date: March 1, 1923
Creator: Everling, E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Nichols wing cutting equipment

The Nichols wing cutting equipment

Date: December 1, 1923
Creator: Ford, James B
Description: Described here is wing cutting equipment for the economical production of metal wings for wind tunnel models. The machine will make any size of constant-section wing or strut up to one-sixth inch chord by 36-inch span and up to a thickness of one and one-quarter inches. It cuts a smooth, true model that is accurate to within two-thousandths of an inch on any ordinate. The holding jaws are so designed as to leave the model free of chip marks, and the only hand finishing necessary after the cutting is a rub with amunite to remove burrs. The actual change on ordinate in this finishing rub is less than .0002 inches.
Contributing Partner: UNT Libraries Government Documents Department
The induction factor used for computing the rolling moment due to the ailerons

The induction factor used for computing the rolling moment due to the ailerons

Date: April 1, 1924
Creator: Munk, Max M
Description: In the following note, prepared for the National Advisory Committee for Aeronautics, this induction factor is determined from the result of a model test, and compared with a formula recently developed by the author. The two results are found to be in substantial agreement.
Contributing Partner: UNT Libraries Government Documents Department
Preliminary study of the damping factor in roll

Preliminary study of the damping factor in roll

Date: October 1, 1923
Creator: Shoemaker, James M & Lee, John G
Description: This paper constitutes a general theoretical discussion of the damping factor in roll, together with the results of wind tunnel tests on the continuous rolling of U.S.A. 30 airfoil.
Contributing Partner: UNT Libraries Government Documents Department
The small diesel engine as an automotive engine

The small diesel engine as an automotive engine

Date: September 1, 1921
Creator: Frey, Ernst
Description: Essential principles for building small diesel engines and also structural details so far as feasibility are presented.
Contributing Partner: UNT Libraries Government Documents Department
Large German airship stations

Large German airship stations

Date: August 1, 1921
Creator: Sabatier, J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The velocity distribution caused by an airplane at the points of a vertical plane containing the span

The velocity distribution caused by an airplane at the points of a vertical plane containing the span

Date: March 1, 1925
Creator: Munk, Max M
Description: A formula for the computation of the vertical velocity component on all sides of an airplane is deduced and discussed. The formation is of value for the interpretation of such free flight tests where two airplanes fly alongside each other to facilitate observation.
Contributing Partner: UNT Libraries Government Documents Department
Tension experiments on diaphragm metals

Tension experiments on diaphragm metals

Date: August 1, 1927
Creator: Henrickson, H B
Description: Strips of german silver, steel, copper, duralumin, nickel and brass were tested in tension in an apparatus in which the change in deflection with time was measured by means of an interferometer. This change in deflection with time caused by the application and removal of a load is defined as "drift" and "recovery," respectively. It was measured in the time interval from approximately 5 seconds to 5 hours after loading. The data are given in a series of graphs in which the drift and recovery are plotted against time. The proportional drift and recovery in five hours are given for a number of the tests, and in addition are shown graphically for nickel and steel.
Contributing Partner: UNT Libraries Government Documents Department
Tests of artificial flight at high altitudes

Tests of artificial flight at high altitudes

Date: November 1, 1920
Creator: Gradenwitz, Arthur
Description: If we wish to form an accurate idea of the extraordinary progress achieved in aeronautics, a comparison must be made of the latest altitude records and the figures regarded as highest attainable limit some ten years ago. It is desirable, for two reasons, that we should be able to define the limit of the altitudes that can be reached without artificial aid. First, to know to what extent the human body can endure the inhalation of rarified air. Second, the mental capacity of the aviator must be tested at high altitudes and the limit known below which he is able to make reliable observations without being artificially supplied with oxygen. A pneumatic chamber was used for the most accurate observations.
Contributing Partner: UNT Libraries Government Documents Department
Shape and strength of seaplane under-structures with special regard to seaworthiness

Shape and strength of seaplane under-structures with special regard to seaworthiness

Date: August 1, 1921
Creator: Lewe, Victor
Description: This report presents experiments and calculations for the purpose of determining the landing gear requirements upon the water. Moving pictures are given which furnish data and also may give both the magnitude and direction of the forces acting. Different classes of seaplanes are examined and proposals for calculation instructions are given.
Contributing Partner: UNT Libraries Government Documents Department