Resource Type
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Serial/Series Title
NACA Technical Memorandums
43
NACA Technical Notes
28
Farmers' bulletin (United States. Department of Agriculture)
12
NACA Aircraft Circulars
11
NACA Technical Reports
11
Farmers' bulletin (United States. Dept. of Agriculture)
5
United States Bureau of Mines Reports
4
National Bureau of Standards Reports
3
Annual Report of the Boy Scouts of America
2
House document (United States. Congress. House)
2
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249 Matching Results
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The Southern Pine Beetle: A Serious Enemy of Pines in the South.
Describes the characteristics of the southern pine beetle, the damage it causes to pine trees in the southern United States, and methods of control.
Date:
May 1929
Creator:
St. George, R. A. (Raymond Alexander), b. 1894 & Beal, J. A. (James Allen), 1898-
Object Type:
Book
System:
The UNT Digital Library
Leaching Nonsulphide Copper Ores with Sulphur Dioxide
Report issued by the Bureau of Mines discussing the sulfurous acid leaching of the Southwest experiment station. Operations and analyses of the experiment station are presented. This report includes tables, illustrations, and photographs.
Date:
May 1923
Creator:
Van Barneveld, Charles E. & Leaver, Edmund S.
Object Type:
Report
System:
The UNT Digital Library
Endurance Tests of Tires
Technical paper issued by the Bureau of Standards over studies conducted on the endurance of tires. 230 tires of 36 different brands were tested during the studies. The results of the studies are presented and discussed. This paper includes tables, and photographs.
Date:
May 25, 1926
Creator:
Holt, W. L. & Wormeley, P. L.
Object Type:
Report
System:
The UNT Digital Library
Safe Mechanical Equipment for Use in Shaft Sinking
Technical paper issued by the Bureau of Mines over shaft sinking safety. Safe mechanical equipment and procedures are discussed. This paper includes illustrations.
Date:
May 1922
Creator:
Kudlich, R. H.
Object Type:
Report
System:
The UNT Digital Library
Utilization of alfalfa.
Describes various uses for alfalfa, with instructions for each.
Date:
May 1922
Creator:
Oakley, R. A. (Russell Arthur) & Westover, H. L. (Harvey Leroy)
Object Type:
Book
System:
The UNT Digital Library
Metal Airplane Construction
It has long been thought that metal construction of airplanes would involve an increase in weight as compared with wood construction. Recent experience has shown that such is not the case. This report describes the materials used, treatment of, and characteristics of metal airplane construction.
Date:
May 1926
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Comments on Crankless Engine Types
This report describes the leading crankless engine types, which have appeared in recent years. These types include: the Mitchell crankless motor car engine and the German Michel engine.
Date:
May 1928
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Prospective Development of Giant Airplanes
This report presents a survey of the latest German giant airplane projects. A description of the physical form of the airplanes, their performance, and some possible applications are provided.
Date:
May 1928
Creator:
Von Römer, B.
Object Type:
Report
System:
The UNT Digital Library
High-Speed Oil Engines for Vehicles Part 3
Ignition-chamber engines and their fuel injection systems are investigated. Specific details are provided for fuel-injection nozzles and fuel pumps are provided.
Date:
May 1927
Creator:
Hausfelder, Ludwig
Object Type:
Report
System:
The UNT Digital Library
Multiplicity of Solutions in Aerodynamics
"One of the most striking phenomena which accompany the flow of fluids such as air and water about bodies, is that of changes in character. This phenomena is still very little understood. We will first discuss the nature of these changes and then show that pure theory leads to a multiplicity of characters of flow, among which we will endeavor to indicate those bearing some analogy to experimental results" (p. 1).
Date:
May 1927
Creator:
Dupont, M.
Object Type:
Report
System:
The UNT Digital Library
Air Cooling: An Experimental Method of Evaluating the Cooling Effect of Air Streams on Air-Cooled Cylinders
In this report is described an experimental method which the writer has evolved for dealing with air-cooled engines, and some of the data obtained by its means. Methods of temperature measurement and cooling are provided.
Date:
May 1927
Creator:
Alcock, J. F.
Object Type:
Report
System:
The UNT Digital Library
Kinetographic Flow Pictures
A method is presented for photographing the flow of fluids with a kinetograph.
Date:
May 1926
Creator:
Prandtl, L. & Tietjens, O.
Object Type:
Report
System:
The UNT Digital Library
Experimental Investigation of the Physical Properties of Medium and Heavy Oils, Their Vaporization and Use in Explosion Engines Part 1
While little has been accomplished in obtaining an abundant supply of light oils from coal and heavy oils, progress has been made on engine design to make use of the heavier oils. Progress has been made in two different directions which are outlined in this paper: the group of engines with medium and high-pressure carburetion in the cylinder; and the group of engines with low-pressure carburetion of the heavy oils before reaching the cylinder.
Date:
May 1926
Creator:
Heinlein, Fritz
Object Type:
Report
System:
The UNT Digital Library
The Parnall "Imp": A New British Light Airplane
Circular presenting a description of the Parnall Imp, which is a new British light airplane that lacks any wire bracing, has an all-wood construction, and has general weatherproof qualities. Results regarding wings, fuselage, landing gear, engine, cockpit, characteristics, drawings, and photographs are provided.
Date:
May 1928
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Marketing the Early-Potato Crop.
A guide to selling in the early-potato market, with an emphasis on proper shipping methods to prevent loss.
Date:
May 1923
Creator:
Fiske, George B. (George Burnap), 1868- & Froehlich, Paul
Object Type:
Book
System:
The UNT Digital Library
Cotton-dusting machinery.
A guide to selecting farm machinery for dusting cotton crops.
Date:
May 1923
Creator:
Johnson, Elmer.; Howard, S. T. (Styles Trenton), 1877- & Coad, B. R.
Object Type:
Book
System:
The UNT Digital Library
Discussion of problems relating to the safety of aviation. Part 1
The object of the present treatise is to examine the present status of aerial safety and to review the efforts of various commissions to promote safety.
Date:
May 1928
Creator:
Sabatier, J.
Object Type:
Report
System:
The UNT Digital Library
Discussion of problems relating to the safety of aviation. Part 2
This report focuses on structural strength and engine design in building and designing safer aircraft.
Date:
May 1928
Creator:
Sabatier, J.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic theory and tests of strut forms 2
This report presents the second of two studies under the same title. In this part five theoretical struts are developed from distributed sources and sinks and constructed for pressure and resistance tests in a wind tunnel. The surface pressures for symmetrical inviscid flow are computed for each strut from theory and compared with those found by experiment. The theoretical and experimental pressures are found to agree quantitatively near the bow, only qualitatively over the suction range, the experimental suctions being uniformly a little low, and not at all near the stern.
Date:
May 1929
Creator:
Smith, R. H.
Object Type:
Report
System:
The UNT Digital Library
Tests of large airfoils in the propeller research tunnel, including two with corrugated surfaces
This report gives the results of the tests of seven 2 by 12 foot airfoils (Clark Y, smooth and corrugated, Gottingen 398, N.A.C.A. M-6, and N.A.C.A. 84). The tests were made in the propeller research tunnel of the National Advisory Committee for Aeronautics at Reynolds numbers up to 2,000,000. The Clark Y airfoil was tested with three degrees of surface smoothness. Corrugating the surface causes a flattening of the lift curve at the burble point and an increase in drag at small flying angles.
Date:
May 24, 1929
Creator:
Wood, Donald H.
Object Type:
Report
System:
The UNT Digital Library
The Gaseous Explosive Reaction at Constant Pressure: The Reaction Order and Reaction Rate
The data given in this report covers the explosive limits of hydrocarbon fuels. Incidental to the purpose of the investigation here reported, the explosive limits will be found to be expressed for the condition of constant pressure, in the fundamental terms of concentrations (partial pressures) of fuel and oxygen.
Date:
May 9, 1929
Creator:
Stevens, F. W.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic theory and test of strut forms. Part I
This report presents the first part of a two part study made under this title. In this part the symmetrical inviscid flow about an empirical strut of high service merit is found by both the Rankine and the Joukowsky methods. The results can be made to agree as closely as wished. Theoretical stream surfaces as well as surfaces of constant speed and pressure in the fluid about the strut are found. The surface pressure computed from the two theories agrees well with the measured pressure on the fore part of the model but not so well on the after part. From the theoretical flow speed the surface friction is computed by an empirical formula. The drag integrated from the friction and measured pressure closely equals the whole measured drag. As the pressure drag and the whole drag are accurately determined, the friction formula also appears trustworthy for such fair shapes. (author).
Date:
May 1928
Creator:
Smith, R. H.
Object Type:
Report
System:
The UNT Digital Library
The N.A.C.A. photographic apparatus for studying fuel sprays from oil engine injection valves and test results from several researches
"Apparatus for recording photographically the start, growth, and cut-off of oil sprays from injection valves has been developed at the Langley Memorial Aeronautical Laboratory. The apparatus consists of a high-tension transformer by means of which a bank of condensers is charged to a high voltage. The controlled discharge of these condensers in sequence, at a rate of several thousand per second, produces electric sparks of sufficient intensity to illuminate the moving spray for photographing. The sprays are injected from various types of valves into a chamber containing gases at pressures up to 600 pounds per square inch" (p. 361).
Date:
May 25, 1927
Creator:
Beardsley, Edward G.
Object Type:
Report
System:
The UNT Digital Library
Lift, drag, and elevator hinge moments of Handley Page control surfaces
"This report combines the wind tunnel results of tests on four control surface models made in the two wind tunnels of the Navy Aerodynamic Laboratory, Washington Navy Yard, during the years of 1922 and 1924, and submitted for publication to the National Advisory Committee for Aeronautics May 7, 1927. The purpose of the tests was to compare, first, the lifts and the aerodynamic efficiencies of the control surfaces from which their relative effectiveness as tail planes could be determined; then the elevator hinge moments upon which their relative ease of operation depended. The lift and drag forces on the control surface models were obtained for various stabilizer angles and elevator settings in the 8 by 8 foot tunnel by the writer in 1922; the corresponding hinge moments were found in the 4 by 4 foot tunnel by Mr. R. M. Bear in 1924" (p. 429).
Date:
May 7, 1927
Creator:
Smith, R. H.
Object Type:
Report
System:
The UNT Digital Library