UNT Libraries Government Documents Department - 194 Matching Results
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Description: The Bristol Badminton, Type 99 airplane has a radial aircooled engine (a Bristol Jupiter 9 cylinder 450 HP.) and three fuel tanks. It is a single seat biplane weighing 1,840 lbs. empty and 2,460 lbs. loaded.
Date: October 1, 1926
Calculation of combining effects in the structure of airplane wings: a rational basis for estimating the reduction in the design load on wing beams due to the influence of ribs and covering toward causing the beams to deflect together
Description: This lecture concerns the combining effects in airplane wings so as to save some of the dead weight.
Date: June 1, 1926
Creator: Thalau, K
Description: We propose to show how to calculate the cooling capacity of all radiators through which the air flows in separate treamlets, whether enclosed in actual tubes or not and whatever cross-sectional shape the tubes may have. The first part will give the fundamental principles for calculating velocity of air in the tubes and the heat exchange by radiation, conduction and convection, and show, by examples, the agreement of the calculation with experiments. In the second part, the effect of the dimensions and conditions of operation on the heat exchange will be systematically investigated.
Date: January 1, 1926
Creator: Richter, L.
Description: Technical paper issued by the Bureau of Mines over the development of carbon monoxide alarms and recorders. Descriptions of the recording equipment are presented and discussed. This paper includes tables, photographs, and illustrations.
Creator: Katz, Sidney H.; Reynolds, D. A.; Frevert, H. W. & Bloomfield, J. J.
Description: This bulletin discusses the cattle-fever tick and methods for controlling it. Possible methods include dipping, pasture rotation, and arsenical dips. The life history of the tick is also discussed.
Creator: Ellenberger, W. P. & Chapin, Robert M.
Description: The staff and construction of the Institute are described as well as a variety of experiments and researches being conducted there.
Date: November 1, 1926
Creator: Margoulis, W
Description: In the construction of aerodynamic tunnels, it is a very important matter to obtain a uniform current of air in the sections where measurements are to be made. The straight type ordinarily used for attaining a uniform current and generally recommended for use, has great defects. If we desire to avoid these defects, it is well to give the canals of the tunnel such a form that the current, after the change of direction of its asymptotes, approximates a uniform and rectilinear movement. But for this, the condition must be met that at no place does the flow exceed the maximum velocity assumed, equal to the velocity in the straight parts of the canal.
Date: February 1, 1926
Creator: Witoszynski, C
Description: This report, on the planing and get-away characteristics of the F-5-L, gives the results of the second of a series of take-off tests on three different seaplanes conducted by the National Advisory Committee for Aeronautics at the suggestion of the Bureau of Aeronautics, Navy Department. The single-float seaplane was the first tested and the twin-float seaplane is to be the third. The characteristics of the boat type were found to be similar to the single float, the main difference being the increased sluggishness and relatively larger planing resistance of the larger seaplane. At a water speed of 15 miles per hour the seaplane trims aft to about 12 degrees and remains in this angular position while plowing. At 2.25 miles per hour the planing stage is started and the planing angle is immediately lowered to about 10 degrees. As the velocity increases the longitudinal control becomes more effective but over control will produce instability. At the get-away the range of angle of attack is 19 degrees to 11 degrees with velocities from the stalling speed through about 25 per cent of the speed range.
Date: January 1926
Creator: Crowley, J. W. & Ronan, K. M.
Description: The data obtained on the NACA M-12 airfoil, tested at twenty atmosphere density in the NACA variable density wind tunnel, have been extended by additional tests at one and at twenty atmospheres under improved conditions. The results of these tests are given. Considerable scale effect was found.
Date: August 1, 1926
Creator: Higgins, George J
Description: Describes the damages caused by the chinch bug to grain and grass crops, and several methods for its control.
Date: June 1926
Creator: Flint, W. P. (Wesley Pillsbury), 1882-1943. & Larrimer, W. H. (Walter Harrison), 1889-
Description: Report issued by the U.S. Bureau of Mines on the coal-mining related deaths in May, 1926. The 126 accidents are documented and categorized. The accidents are analyzed in order to prevent future accidents, and to implement safety procedures. This report includes tables.
Date: June 1926
Creator: Adams, William Waugh
Description: Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Creator: Adams, William W.
Description: The purpose of this investigation was to determine the performance, characteristics, and coefficients of full-sized air propellers in flight and to compare these results with those derived from wind-tunnel tests on reduced scale models of similar geometrical form. The full-scale equipment comprised five propellers in combination with a VE-7 airplane and Wright E-4 engine. This part of the work was carried out at the Langley Memorial Aeronautical Laboratory, between May 1 and August 24, 1924, and was under the immediate charge of Mr. Lesley. The model or wind-tunnel part of the investigation was carried out at the Aerodynamic Laboratory of Stanford University and was under the immediate charge of Doctor Durand. A comparison of the curves for full-scale results with those derived from the model tests shows that while the efficiencies realized in flight are close to those derived from model tests, both thrust developed and power absorbed in flight are from 6 to 10 per cent greater than would be expected from the results of model tests.
Date: January 1, 1926
Creator: Durand, W F & Lesley, E P
Description: This report presents the results of experiments on aerodynamic fuselages in which an air current is forced into the nose of the fuselage by the action of several fans revolving with the propeller. The air is then guided by special deflectors which cause it to flow along the exhaust pipes and cylinders and then, after having been utilized, pass out through annular ports. This system of cooling worked perfectly at all speeds.
Date: October 1, 1926
Description: Provides suggestions for people interested in or involved in cooperative livestock shipping associations. Discusses organizational aspects, management, shipments, livestock marking, and business methods.
Date: July 1926
Creator: United States. Bureau of Agricultural Economics.
Description: Revised edition. "Corn yields per acre in the United States could be doubled within a few years, and this could be accomplished without increase in work or expense.... The lines of improvement that will most easily and quickly double the present production per acre are as follow: (1) Improvement in the quality of seed planted; (2) improvement in the condition of the soil; (3) improvement in methods of cultivation." -- p. 3-4
Creator: Hartley, C. P.
Description: Revised edition. "This bulletin shows how farmers, ranchmen, and country or town butchers may produce hides and skins of better quality. It gives detailed directions for skinning the animals and for salting, curing, and handling the hides and skins, with suggestions for more advantageous marketing, to the end that both the producer of hides and the user of leather may be benefited." -- p. ii
Creator: Whalin, Charles Vivion, 1876-; Frey, R. W. (Ralph Wylie), b. 1889; Veitch, F. P. (Fletcher Pearre), 1868-1943 & Hickman, Richard W. (Richard West), 1852-1926
Description: Officially designated D.H. 60, De Havilland's Moth is a small, simply made, 770 lb. aircraft. It has had it's fittings reduced in number to assist in this, seats 2 (including pilot) and uses a Cirrus 60 HP. engine.
Date: October 1, 1926
Description: This report describes a roots type aircraft engine supercharger and presents the results of some tests made with it at the Langley Field Laboratories of the National Advisory Committee for Aeronautics. The supercharger used in these tests was constructed largely of aluminum, weighed 88 pounds and was arranged to be operated from the rear of a standard aircraft engine at a speed of 1 1/2 engine crankshaft speed. The rotors of the supercharger were cycloidal in form and were 11 inches long and 9 1/2 inches in diameter. The displacement of the supercharger was 0.51 cubic feet of air per revolution of the rotors. The supercharger was tested in the laboratory, independently and in combination with a Liberty-12 aircraft engine, under simulated altitude pressure conditions in order to obtain information on its operation and performance. From these tests it seems evident that the Roots blower compares favorably with other compressor types used as aircraft engine superchargers and that it has several features that make it particularly attractive for such use.
Date: January 1, 1926
Creator: Ware, Marsden
Description: Experimental data, such as the results of tank tests of models, render it possible to predict, at least in principle, as to how a hull or float of a given shape will comport itself. We will see further along, however, how uncertain these methods are and how they leave room for empiricism, which will reign for a long time yet in seaplane research bureaus.
Date: August 1, 1926
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Government Documents A to Z Digitization Project 20 20 Environmental Policy Collection 1 1 National Advisory Committee for Aeronautics Collection 123 123 Technical Report Archive and Image Library 160 160 USDA Farmers' Bulletins 29 29 United States Experiment Station Record 3 3 United States Experiment Station Reports 2 2
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NACA Technical Memorandums 49 49 United States Bureau of Mines Reports 29 29 Farmers' bulletin (United States. Dept. of Agriculture) 27 27 NACA Aircraft Circulars 26 26 NACA Technical Reports 24 24 NACA Technical Notes 22 22 Technical paper (United States. Bureau of Mines) 8 8 National Bureau of Standards Reports 6 6 Bulletin (United States. Bureau of Mines) 4 4 Report of investigations (United States. Bureau of Mines) 4 4 Experiment Station Record 3 3 Technologic papers of the Bureau of Standards 3 3 North American Fauna 2 2 United States Fish and Wildlife Service Reports 2 2 Coal-Mine Fatalities 1 1 Coal-Mine Fatalities in the United States 1 1 Information circular (United States. Bureau of Mines) 1 1 Metal-Mine Accidents in the United States During the Calendar Year 1 1 Miscellaneous publications (United States. Bureau of Standards) 1 1 NACA Special Reports 1 1 National Bureau of Standards miscellaneous publication 1 1 Quarry Accidents in the United States During the Calendar Year 1 1 Report of the National Conference on Weights and Measures 1 1 Scientific papers (United States. National Bureau of Standards) 1 1 armers' bulletin (United States. Dept. of Agriculture) 1 1
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