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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1942
 Month: February
 Collection: Technical Report Archive and Image Library
An investigation of diffuser-resistance combinations in duct systems

An investigation of diffuser-resistance combinations in duct systems

Date: February 1, 1942
Creator: Nichols, Mark R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The photoviscous properties of fluids

The photoviscous properties of fluids

Date: February 1, 1942
Creator: Weller, R; Hiddlehurst, D J & Steiner, R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Principles and methods of rating and testing centrifugal superchargers

Principles and methods of rating and testing centrifugal superchargers

Date: February 1, 1942
Creator: Goldstein, Arthur W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Progress summary number I : mechanical properties of flush-riveted joints submitted by five airplane manufacturers

Progress summary number I : mechanical properties of flush-riveted joints submitted by five airplane manufacturers

Date: February 1, 1942
Creator: Brueggeman, William Charles
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Statics of circular-ring stiffeners for monocoque fuselages

Statics of circular-ring stiffeners for monocoque fuselages

Date: February 1, 1942
Creator: Stieda, W
Description: For circular-ring stiffeners in monocoque fuselages the bending moments, axial forces, and shear forces under the action of applied external forces or a moment are accurately computed by known methods. Circular-ring stiffeners with variable moments of inertia are likewise considered. In comparison with the step-by-step and partially graphical procedure, the one here described is a more accurate and at the same time a simpler method.
Contributing Partner: UNT Libraries Government Documents Department
Stemming in Metal Mines. Progress Report 3: Relative Advantages and Disadvantages of Different Types of Stemming and No Stemming When Used with 60 Percent Ammonia Gelatin Dynamite at the Mount Weather Testing Adit

Stemming in Metal Mines. Progress Report 3: Relative Advantages and Disadvantages of Different Types of Stemming and No Stemming When Used with 60 Percent Ammonia Gelatin Dynamite at the Mount Weather Testing Adit

Date: February 1942
Creator: Johnson, John A.; Agnew, Wing G. & Mosier, McHenry
Description: Report issued by the U.S. Bureau of Mines on the progress made in metal-mine stemming. Previous reports have been presented impartially, or under different procedures. This report contains updated progress results from current procedures and mine conditions. The report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
The stresses in stiffener openings

The stresses in stiffener openings

Date: February 1, 1942
Creator: Marguerre, K
Description: The present study treats as a typical example a ring the center line of which is produced by the intersection of two circular cylinders of different diameter. Three load cases are analyzed: (1) Axial and circumferential stresses in both cylinders, the cylinder stresses themselves to be in the ratio conformal to the cylinders loaded under internal pressure. (2) Pure longitudinal tension in the large cylinder. (3) Pure shear (torsion) in the large cylinder. To simplify the calculation, it is assumed that the ring, compared to the shell, is very strong, so that its deformations have no perceptible effect on the stress condition in the shell. This provides an upper limit for the ring stresses actually produced in a shell design, for, according to the theory of stressed skin statics the shells, by elastic flexibility of the ring, regroup the forces deposited on it in such a manner that the ring is relieved.
Contributing Partner: UNT Libraries Government Documents Department
Tensile and pack compressive tests of some sheets of aluminum alloy, 1025 carbon steel, and chromium-nickel steel

Tensile and pack compressive tests of some sheets of aluminum alloy, 1025 carbon steel, and chromium-nickel steel

Date: February 1, 1942
Creator: Atchison, C S & Miller, James A
Description: Tensile and compressive stress-strain curves, stress-deviation curves, and secant modulus-stress curves are given for longitudinal and transverse specimens of 17S-T, 24S-T, and 24S-RT aluminum-alloy sheet in thicknesses from 0.032 to 0.081 inch, 1025 carbon steel sheet in thicknesses of 0.054 and 0.120 inch, and chromium-nickel steel sheet in thicknesses form 0.020 to 0.0275 inch. Significant differences were found between the tensile and the compressive stress-strain curves, and also the corresponding corollary curves; similarly, differences were found between the curves for the longitudinal and transverse directions. These differences are of particular importance in considering the compressive strength of aircraft structures made of thin sheet. They are explored further for the case of compression by giving tangent modulus-stress curves in longitudinal and transverse compression and dimensionless curves of the ratio of tangent modulus to Young's modulus and of the ratio of reduced modulus for a rectangular section to Young's modulus, both plotted against the ratio of stress to secant yield strength.
Contributing Partner: UNT Libraries Government Documents Department
A theoretical analysis of the effect of aileron inertia and hinge moment on the maximum rolling acceleration of airplanes in abrupt aileron rolls

A theoretical analysis of the effect of aileron inertia and hinge moment on the maximum rolling acceleration of airplanes in abrupt aileron rolls

Date: February 1, 1942
Creator: O'Sullivan, William J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tidewater and weather-exposure tests on metals used in aircraft II.

Tidewater and weather-exposure tests on metals used in aircraft II.

Date: February 1, 1942
Creator: Mutchler, Willard & Galvin, W G
Description: This report is an addendum to NACA Technical Note No. 736, which dealt with tidewater and weather-exposure tests being conducted by the National Bureau of Standards on various aluminum alloys, magnesium alloys, and stainless steels used in aircraft. The exposures were begun in June 1938 and were terminated, for this particular series, in June 1941. The methods of exposure and the materials being investigated are described, and the more important results obtained up to the conclusion of the second year's exposure are reported.
Contributing Partner: UNT Libraries Government Documents Department
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