UNT Libraries Government Documents Department - 191 Matching Results

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Effect of Oxygen on the Ignition of Liquid Fuels

Description: The ignition temperature, ignition lag, and ignition strength of simple and homogeneous fuels in combustion air of small oxygen content differ from what they are in air of greater oxygen content. In the case of small oxygen content, these fuels behave as if mixed unevenly. In the case of air with a definite oxygen content, the simple fuels have two ignition points, between which ignition takes place within a certain temperature range. The phenomena are explained by pyrogenous decomposition, com… more
Date: January 1929
Creator: Pahl, H.
Item Type: Refine your search to only Report
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The Effect of Reduction Gearing on Propeller-Body Interference as Shown by Full-Scale Wind-Tunnel Tests

Description: This report presents the results of full-scale tests made on a 10-foot 5-inch propeller on a geared J-5 engine and also on a similar 8-foot 11-inch propeller on a direct-drive J-5 engine. Each propeller was tested at two different pitch settings, and with a large and a small fuselage. The investigation was made in such a manner that the propeller-body interference factors were isolated, and it was found that, considering this interference only, the geared propellers had an appreciable advantage… more
Date: March 20, 1929
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
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Effect of Stressed Covering on Strength of Internal Girders of a Wing

Description: In practice the actual maximum stress is greater than the stress determined by the simple girder theory, which overestimates the bearing or supporting capacity of the flange. The fact is that the assumptions of the simple girder theory no longer hold true, since normal transverse and shearing stresses are engendered in the plane of the flange.
Date: March 1929
Creator: Tellers, H.
Item Type: Refine your search to only Report
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The Effect of Supercharger Capacity on Engine and Airplane Performance

Description: This report presents the results of an investigation to determine the effect of different supercharger capacities on the performance of an airplane and its engine . The tests were conducted on a DH4-M2 airplane powered with a Liberty 12 engine. In this investigation four supercharger capacities, obtained by driving a roots type supercharger at 1.615, 1.957, 2.4, and 3 time engine speed, were used to maintain sea-level pressure at the carburetor to altitudes of 7,000, 11,500, 17,000, and 22,000 … more
Date: March 13, 1929
Creator: Schey, O. W. & Gove, W. D.
Item Type: Refine your search to only Report
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Effect of turbulence in wind-tunnel measurements

Description: This paper gives some quantitative measurements of wind tunnel turbulence and its effect on the air resistance of spheres and airship models, measurements made possible by the hot wire anemometer and associated apparatus in its original form was described in Technical Report no. 320 and some modifications are presented in an appendix to the present paper. One important result of the investigation is a curve by means of which measurements of the air resistance of spheres can be interpreted to gi… more
Date: August 20, 1929
Creator: Dryden, H. L. & Kuethe, A. M.
Item Type: Refine your search to only Report
open access

Effect of variation of chord and span of ailerons on rolling and yawing moments at several angles of pitch

Description: This report presents the results of an extension to higher angles of attack of the investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wings. The measurements were made at various angles of pitch but at zero angle of roll and yaw, the wing chord being set at an angle of +4 degrees to the fuselage axis. In the case of the Clark Y airfoil the measurements have been extended to a pitch angle of 40 degrees, u… more
Date: October 7, 1929
Creator: Heald, R. H.; Strother, D. H. & Monish, B. H.
Item Type: Refine your search to only Report
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Experiment Station Record, Volume 60, January-June, 1929

Description: Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, bibliographies and listings for Spanish edition publications from the Porto Rico Station. Name and subject indexes start on page 901.
Date: 1929
Creator: United States. Office of Experiment Stations.
Item Type: Refine your search to only Book
open access

Factors Governing the Entry of Solutions into Ores During Leaching

Description: Technical paper issued by the Bureau of Mines over studies on the leaching of copper-bearing ores. As stated in the introduction, the "penetration of the leaching medium into the body of the ore particles" (p. 1) is discussed. This paper includes tables, photographs, and illustrations.
Date: 1929
Creator: Sullivan, John D.; Keck, Walter E. & Oldright, George L.
Item Type: Refine your search to only Report
open access

Facts Relating to the Production and Substitution of Manufactured Gas for Natural Gas

Description: Report issued by the Bureau of Mines over information obtained on manufactured gas production instead of natural gas production. The information collected is discussed. This includes such topics as rates, methods, and locations of gas. This report includes tables, maps, illustrations, and photographs.
Date: 1929
Creator: Odell, William Wallace
Item Type: Refine your search to only Report
open access

The Fairey III.F (British): A General Purpose Biplane

Description: Circular describing the Fairey III.F, which is a general-purpose biplane created by the Fairey Aviation Company to serve as a fighter, bomber, reconnaissance, ambulance, passenger, or long-range airplane. Details of the structure, power plant, wings, tail, landing gear, cockpits, controls, corrosion proofing, instruments, radio, armament, drawings, and photographs are provided.
Date: September 1929
Item Type: Refine your search to only Report
open access

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
open access

Fluttering of the Tail Surfaces of an Airplane and the Means for Its Prevention

Description: The present article, which constitutes a continuation of the work of Von Baumhauer and Konig, will therefore be restricted to the fluttering of the tail surfaces and especially to oscillations of the horizontal empennage. This will also illustrate the characteristics of all other phenomena of fluttering.
Date: January 1929
Creator: Scheubel, F. N.
Item Type: Refine your search to only Report
open access

Force Measurements on Airplanes

Description: The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
Date: June 1929
Creator: Seewald, F.
Item Type: Refine your search to only Report
open access

Forces on elliptic cylinders in uniform air stream

Description: From Summary: "This report presents the results of wind tunnel tests on four elliptic cylinders with various fineness ratios, conducted in the Navy Aerodynamic Laboratory, Washington. The object of the tests was to investigate the characteristics of sections suitable for streamline wire which normally has an elliptic section with a fineness ratio of 4.0; also to learn whether a reduction in fineness ratio would result in improvement; also to determine the pressure distribution on the model of f… more
Date: 1929
Creator: Zahm, A. F.; Smith, R. H. & Louden, F. A.
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

Fuel-Efficiency Tests on Batch Oil Stills

Description: From Introduction Need for Tests: "This bulletin presents in condensed form the results of these tests and the deductions made from them. The tests were made at two refineries, designated here at plant 1 and plant 2."
Date: 1929
Creator: Kreisinger, Henry; Argyle, W. R. & Rice, W. E.
Item Type: Refine your search to only Report
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