UNT Libraries Government Documents Department - 191 Matching Results

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Wind Tunnel Tests on an Airfoil Equipped With a Split Flap and a Slot

Description: "The investigation described in this report is concerned with the changes in the aerodynamic characteristics of an airfoil which are produced by a gauze-covered suction slot, located near the leading edge, and connected by an air passage to a split flap at the trailing edge. The tests were conducted at the Langley Memorial Aeronautical Laboratory. At the larger values of lift coefficient where the action of the slot might be expected to be most effective, the pressure differences were such that… more
Date: October 1929
Creator: Bamber, Millard J.
Item Type: Refine your search to only Report
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Impact Waves and Detonation: Part 1

Description: "Among the numerous thermodynamic and kinetic problems that have arisen in the application of the gaseous explosive reaction as a source of power in the internal combustion engine, the problem of the mode or way by which the transformation proceeds and the rate at which the heat energy is delivered to the working fluid became very early in the engine's development a problem of prime importance. The work of Becker here given is a notable extension of earlier investigations, because it covers the… more
Date: March 1929
Creator: Becker, R.
Item Type: Refine your search to only Report
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Impact Waves and Detonation: Part 2

Description: A continuation of a previous technical memorandum regarding impact waves and detonation. This particular report focuses on the applications to detonation under several different conditions, including variations in pressure.
Date: March 1929
Creator: Becker, R.
Item Type: Refine your search to only Report
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Contribution to the Aileron Theory

Description: "In an attempt to treat theoretically the effect of ailerons, difficulty arises because an aileron may begin at any point of the wing. Hence the question arises as to how the transition of the lift distribution proceeds at such a point, since the effect of the aileron (i.e., the moment generated about the longitudinal axis) depends largely on this distribution. In order to answer this question regarding the lift distribution during irregular variations in the angle of attack at first independen… more
Date: December 1929
Creator: Betz, A. & Petersohn, E.
Item Type: Refine your search to only Report
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Feed-Lot and Ranch Equipment for Beef Cattle

Description: "Practical equipment which is more or less essential in the successful handling of beef cattle on the range and in the feed lot is discussed in this bulletin and illustrated by drawings and photographs. Details concerning silos, barns, and concrete work which have previously been presented in other publications are not included, but reference is made to the publication containing such details." -- p. ii. Includes discussion of sheds, windbreaks, feeders, troughs, tanks, silos, scales, corrals, … more
Date: 1929
Creator: Black, W. H. 1888-1949 & Parr, V. V.; 1888-
Item Type: Refine your search to only Pamphlet
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Mechanical Control of Airplanes

Description: "Before undertaking a detailed description of an automatic-control mechanism, I will state briefly the fundamental conditions for such devices. These are: 1) it must be sensitive at one or more reference values; 2) it must stop the angular motions of the airplane not produced by the pilot; and 3) it must be possible to switch it off and on by a simple hand lever" (p. 1).
Date: March 1929
Creator: Boykow, H.
Item Type: Refine your search to only Report
open access

Landing and Braking of Airplanes

Description: In the numerical examples, we have considered an airplane landing in calm air in a fixed direction after crossing the border (with its obstacles) at a height of 30 m. Its stopping point is at a distance D from the obstacle, comprising: a distance D(sub 1) in regular gliding flight; a distance D(sub 2) in levelling off; a distance D(sub 3) in taxying on the ground. The calculations enable us to make out the following table, which gives an idea of the improvements to be expected in the use of var… more
Date: April 1929
Creator: Breguet, Louis
Item Type: Refine your search to only Report
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Lautal as a Material for Airplane Construction

Description: Lautal is a refinable aluminum alloy which, unlike duralumin, contains no magnesium. According to the statements of the Lauta Works, lautal contains: aluminum, 94%; copper, 4%; silicon, 2%. The use of lautal as a construction material is discussed in relation to specific weight, production methods, and riveting tests.
Date: August 1929
Creator: Brenner, Paul
Item Type: Refine your search to only Report
open access

Bibliography of Petroleum and Allied Substances, 1922 and 1923

Description: From Introduction: "This bulletin is the seventh in this series of petroleum bibliographies published by the Bureau of Mines, Bulletins 149, 165, 180, 189, 216, and 220 being complications for the years 1915, 1916, 1917, 1918, 1919-20, and 1921, respectively. In this bulletin the same general plan of classification of references has been followed, but several additions have been made."
Date: 1929
Creator: Britton, H.
Item Type: Refine your search to only Report
open access

Correcting Engine Tests for Humidity

Description: Note presenting tests using a multicylinder engine to determine the effect that atmospheric humidity has on some phases of engine performance. Three test series with different types of fuel were carried out. The results indicate that failure to allow for the effect of differences in atmospheric humidity may introduce errors as great as would be occasioned by failure to allow for changes in barometric pressure.
Date: June 1929
Creator: Brooks, Donald B.
Item Type: Refine your search to only Report
open access

Welding of Stainless Materials

Description: "It would appear that welds in some stainless steels, heat-treated in some practicable way, will probably be found to have all the resistance to corrosion that is required for aircraft. Certainly these structures are not subjected to the severe conditions that are found in chemical plants. This article should be considered as an outline of what can be done, not necessarily as instructions, which will enable anyone to obtain satisfactory results in commercial work" (p. 1).
Date: September 1929
Creator: Bull, H. & Johnson, Lawrence
Item Type: Refine your search to only Report
open access

Effect of Intake Pipe on the Volumetric Efficiency of an Internal Combustion Engine

Description: " The writer discusses the phenomena of expansion and compression which alternately take place in the cylinders of four-stroke engines during the induction process at a high mean piston speed due to the inertia and elasticity of the mixture in the intake pipe. The present paper is intended to demonstrate theoretically the existence of a most favorable pipe length for charging" (p. 1).
Date: February 1929
Creator: Capetti, Antonio
Item Type: Refine your search to only Report
open access

The Formation of Ice Upon Airplanes in Flight

Description: This report describes the atmospheric conditions under which ice is formed upon the exposed parts of airplanes in flight. It identifies the formation found under different conditions, and describes some studies of preventative means.
Date: August 1929
Creator: Carroll, Thomas & McAvoy, William H.
Item Type: Refine your search to only Report
open access

Spiral Tendency in Blind Flying

Description: "The flight path followed by an airplane which was being flown by a blindfolded pilot was observed and recorded. When the pilot attempted to make a straight-away flight there was a tendency to deviate from the straight path and to take up a spiral one" (p. 1).
Date: August 1929
Creator: Carroll, Thomas & McAvoy, William H.
Item Type: Refine your search to only Report
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