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The Use of Elektron Metal in Airplane Construction

Description: Memorandum presenting an evaluation of elektron, which is the lightest of the light metals and is of particular interest for aircraft construction. Some of its chemical properties, particular alloys and wrought materials that can be made using elektron, and some of the potential ways in which the material might be used are provided.
Date: February 1931
Creator: de Ridder, E. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Weights of 17ST and Steel Tubular Structural Members Used in Aircraft Construction

Description: Although the strong aluminum alloys have proved themselves to be very efficient in aircraft construction there is a growing competition from the high-strength steels for certain parts, especially for tubular members. This tendency is being reflected in research work carried on at the Bureau of Standards. This study will be based largely on data given in Technical Note No. 307 of the NACA.
Date: May 1931
Creator: Hartmann, E. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Principles of dairy-barn ventilation.

Description: Explains the importance of ventilation and temperature regulation for dairy barns. Describes various types of barn ventilation systems and how they are constructed.
Date: 1931
Creator: Kelley, M. A. R. (Manley Alexander Raymond), 1888-1943
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Selection of cotton fabrics.

Description: Describes varieties of cotton fabrics and provides suggestions for their use in clothing and other sewn products. Provides suggestions for evaluating the quality of cotton fabrics.
Date: July 1931
Creator: O'Brien, Ruth, b. 1892
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Relative economy of different methods of airplane construction

Description: "A comparison of the relative economy of airplane construction shows that monoplanes are cheaper than biplanes; that all-metal construction is much more expensive than mixed construction; that multi-engine airplanes are more expensive than single-engine types of the same carrying capacity and speed;that the cost of airplanes is materially reduced by increasing their size without increasing the number of engines. The greatest economy usually coincides with the best aerodynamic and static conditi… more
Date: April 1931
Creator: Herrmann, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flat Sheet Metal Girders With Very Thin Metal Web. Part 2: Sheet Metal Girders With Spars Resistant to Bending - Oblique Uprights - Stiffness

Description: "Noting that the stiffness of the girder increases very rapidly as Beta increases, the result can be summed up as follows: When the cross stress preponderates in one direction and when the web plate is to be given the dimensions commensurate to its stresses, it is advisable (regardless of any ensuing structural difficulties) to set the uprights at about Beta = 120 degrees, thereby lowering the weight of the plate wall 15 percent (in contrast to Beta = 90 degrees), and raising the stiffness 55 p… more
Date: February 1931
Creator: Wagner, Herbert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flat Sheet Metal Girders With Very Thin Metal Web. Part 1: General Theories and Assumptions

Description: The object of this report was to develop the structural method of sheet metal girders and should for that reason be considered solely from this standpoint. The ensuing methods were based on the assumption of the infinitely low stiffness in bending of the metal web. This simplifies the basis of calculations to such an extent that many questions of great practical importance can be examined which otherwise cannot be included in any analysis of the bending stiffness of the buckled plate. This repo… more
Date: February 1931
Creator: Wagner, Herbert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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