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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Results 15351 - 15360 of 17,421
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Relative economy of different methods of airplane construction

Relative economy of different methods of airplane construction

Date: April 1, 1931
Creator: Herrmann, H
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 conditions and the cost is always increased by safety requirements.
Contributing Partner: UNT Libraries Government Documents Department
The S.P.C.A. 40 T commercial airplane (French) : an all-metal cantilever monoplane

The S.P.C.A. 40 T commercial airplane (French) : an all-metal cantilever monoplane

Date: April 1, 1931
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Strength tests on paper cylinder in compression, bending and shear

Strength tests on paper cylinder in compression, bending and shear

Date: April 1, 1931
Creator: Rhodes, Richard V & Lundquist, Eugene E
Description: Static tests on paper cylinders were conducted at the Langley Memorial Aeronautical Laboratory at Langley Field, Virginia, to obtain qualitative information in connection with a study of the strength of stressed-skin fuselages. The effects of radius-thickness ratio and bulkhead spacing were investigated with the cylinders in compression, bending, combined bending and shear, and torsion.
Contributing Partner: UNT Libraries Government Documents Department
A study of curvilinear flight

A study of curvilinear flight

Date: April 1, 1931
Creator: Kruse, Helmuth
Description: When an airplane describes a curve it takes a certain time for it to turn from level to inclined position and then back to level again. In the following, we express the motion about the horizontal axis as "roll" or "bank" and the motion perpendicular to the vertical axis, i.e., the actual curve, as "turn." Equations and tables provide results on various aspects of turns, control settings, acceleration, inertia moments, and angular velocity.
Contributing Partner: UNT Libraries Government Documents Department
The transference of heat from a hot plate to an air stream

The transference of heat from a hot plate to an air stream

Date: April 1, 1931
Creator: Elias, Franz
Description: The object of the present study was to define experimentally the field of temperature and velocity in a heated flat plate when exposed to an air stream whose direction is parallel to it, then calculate therefrom the heat transference and the friction past the flat plate, and lastly, compare the test data with the mathematical theory. To ensure comparable results, we were to actually obtain or else approximate: a) two-dimensional flow; b) constant plate temperature in the direction of the stream. To approximate the flow in two dimensions, we chose a relatively wide plate and measured the velocity and temperature in the median plane.
Contributing Partner: UNT Libraries Government Documents Department
The Bernard 120 seaplane (French) : a 1400 hp single-seat monoplane racer

The Bernard 120 seaplane (French) : a 1400 hp single-seat monoplane racer

Date: March 1, 1931
Creator: Leglise, Pierre
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Bleriot 110 airplane (French) : a long-distance high-wing monoplane

The Bleriot 110 airplane (French) : a long-distance high-wing monoplane

Date: March 1, 1931
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Coal-Mine Fatalities in February, 1931

Coal-Mine Fatalities in February, 1931

Date: March 1931
Creator: Adams, William Waugh & Chenoweth, L.
Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths during the month of February, 1931. The number of fatalities and the causes of each are presented. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Development and Production History on the Salt Flat and Other Fault Fields of East Central Texas

Development and Production History on the Salt Flat and Other Fault Fields of East Central Texas

Date: March 1931
Creator: Hill, Harry Blackburn; Bauserman, E. V. H. & Carpenter, C. B.
Description: Report issued by the Bureau of Mines over the Salt Flat fields in East Central Texas. As stated in the introduction, "this report deals with the development and production history of the Salt Flat field and gives comparative data on five outstanding fault fields. Two of these fields are producing from limestone and three from sandstone reservoirs" (p. 2-3). This report includes tables, maps, photographs, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles

Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles

Date: March 1, 1931
Creator: Gelalles, A G & March, E T
Description: The variation of the coefficient of discharge with the length-diameter ratio of the orifice was determined for nozzles having single orifice 0.008 and 0.020 inch in diameter. Ratios from 0.5 to 10 were investigated at injection pressures from 500 to 5,000 pounds per square inch. The tests showed that, within the error of the observation, the coefficients were the same whether the nozzles were assembled at the end of a constant tube or in an automatic injection valve having a plain stem.
Contributing Partner: UNT Libraries Government Documents Department