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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Some effects of sweep and aspect ratio on the transonic flutter characteristics of a series of thin cantilever wings having a taper ratio of 0.6
No Description digital.library.unt.edu/ark:/67531/metadc61634/
Some effects of sweep and thickness on the experimental downwash characteristics at transonic speeds of a series of highly tapered wings with an aspect ratio of 3 : transonic bump method
No Description digital.library.unt.edu/ark:/67531/metadc61983/
Some effects of system nonlinearities in the problem of aircraft flutter
No Description digital.library.unt.edu/ark:/67531/metadc57724/
Some effects of tail height and wing plan form on the static longitudinal stability characteristics of a small-scale model at high subsonic speeds
No Description digital.library.unt.edu/ark:/67531/metadc56311/
Some effects of valve friction and shock stick friction on control quality in a helicopter with hydraulic-power control systems
No Description digital.library.unt.edu/ark:/67531/metadc56669/
Some effects of vanes and of turbulence in two-dimensional wide-angle subsonic diffusers
No Description digital.library.unt.edu/ark:/67531/metadc57068/
Some effects of variations in several parameters including fluid density on the flutter speed of light uniform cantilever wings
No Description digital.library.unt.edu/ark:/67531/metadc55887/
Some effects of varying the damping in pitch and roll on the flying qualities of a small single-rotor helicopter
No Description digital.library.unt.edu/ark:/67531/metadc55817/
Some effects of wing fences on the lateral stability derivatives of a 60 degree delta wing oscillating continuously in yaw
No Description digital.library.unt.edu/ark:/67531/metadc62717/
Some effects of wing height on the vertical-tail pressure distributions of a complete model in sideslip at high subsonic speeds
No Description digital.library.unt.edu/ark:/67531/metadc63687/
Some elementary principles of shell stress analysis with notes on the use of the shear center
The analysis of various types of shell under combined bending and torsion is discussed. The calculation and the use of the shear center are touched upon as incidental problems. Twelve fully worked numerical examples are given in an appendix. digital.library.unt.edu/ark:/67531/metadc54579/
Some Engineering Problems of the Panama Canal in Their Relation to Geology and Topography
Report issued by the Bureau of Mines over issues encountered during construction of the Panama Canal. As stated in the introduction, "this report aims to discuss, from the viewpoint of the mining geologist, the bearing of topographic and geologic conditions on certain problems that arose in the construction of the Panama Canal" (p. 7). This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc38741/
Some Essential Safety Factors in Tunneling
No Description digital.library.unt.edu/ark:/67531/metadc12599/
Some exact solutions of two-dimensional flows of compressible fluid with hodograph method
No Description digital.library.unt.edu/ark:/67531/metadc56900/
Some examples of the applications of the transonic and supersonic area rules to the prediction of wave drag
No Description digital.library.unt.edu/ark:/67531/metadc62543/
Some Experiences Regarding the Nonlinearity of Hot Wires
We compare here the results of some experiences with the formulas established in our preceding report 'Nonlinear Theory of a Hot-Wire Anemometer.' We shall show that the nonlinear term plays a role as important as the thermal conduction in the calculation of the thermal inertia of the hot wire. digital.library.unt.edu/ark:/67531/metadc64029/
Some experimental effects of afterbody shape on the zero-lift drag of bodies for Mach numbers between 0.8 and 1.3
No Description digital.library.unt.edu/ark:/67531/metadc59874/
Some Experimental Heating Data on Convex and Concave Hemispherical Nose Shapes and Hemispherical Depressions on a 30 Deg Blunted Nose Cone
No Description digital.library.unt.edu/ark:/67531/metadc53146/
Some experimental studies of panel flutter at Mach number 1.3
Experimental studies of panel flutter using thin metal plates were conducted at a Mach number of 1.3 to verify its existence and to study the effects of some structural parameters on the flutter characteristics. The effects of tensile forces and buckling were studied on panels clamped front and rear, in addition to initially buckled panels clamped on all four edges. Panel flutter was obtained under controlled laboratory conditions and it was found that tensile forces, shortening the panels, and increasing the bending stiffness were effective means for eliminating flutter. Buckled panels were more susceptible to flutter than unbuckled panels. No apparent systematic trends in the flutter modes or frequencies could be observed. digital.library.unt.edu/ark:/67531/metadc56556/
Some experiments at high supersonic speeds on the aerodynamic and boundary-layer transition characteristics of high-drag bodies of revolution
No Description digital.library.unt.edu/ark:/67531/metadc64511/
Some experiments on autorotation of an airfoil
These experiments show that the rate of auto rotation of a monoplane airfoil is reduced by sweepback, ceasing entirely when the sweepback is 30 degrees. In addition a very serious increase in rate and range of auto rotation with yaw is shown. digital.library.unt.edu/ark:/67531/metadc54056/
Some experiments on the flutter of sweptback cantilever wing models at Mach number 1.3
No Description digital.library.unt.edu/ark:/67531/metadc58793/
Some experiments on the slipstream effect
The models designated "Torino 30, 31, 32" are horizontal tail surfaces of rectangular, triangular, and elliptical plan form and all of the same profile section. Tests were carried out with the object being to determine the effect of the propeller slipstream on the aerodynamical characteristics of the horizontal stabilizer. The results presented correspond to a first series of tests made without an interposed wing and in which the distance between the plane of the propeller disk and the tail was maintained constant. digital.library.unt.edu/ark:/67531/metadc63379/
Some experiments on visualization of flow fields behind low-aspect-ratio wings by means of a tuft grid
No Description digital.library.unt.edu/ark:/67531/metadc56963/
Some experiments relating to the problem of simulation of hot jet engines in studies of jet effects on adjacent surfaces at a free-stream Mach number of 1.80
No Description digital.library.unt.edu/ark:/67531/metadc62792/
Some factors affecting automatic control of airplanes
No Description digital.library.unt.edu/ark:/67531/metadc59107/
Some factors affecting combustion in an internal-combustion engine
An investigation of the combustion of gasoline, safety, and diesel fuels was made in the NACA combustion apparatus under conditions of temperature that permitted ignition by spark with direct fuel injection, in spite of the compression ratio of 12.7 employed. The influence of such variables as injection advance angle, jacket temperature, engine speed, and spark position was studied. The most pronounced effect was that an increase in the injection advance angle (beyond a certain minimum value) caused a decrease in the extent and rate of combustion. In almost all cases combustion improved with increased temperature. The results show that at low air temperatures the rates of combustion vary with the volatility of the fuel, but that at high temperatures this relationship does not exist and the rates depend to a greater extent on the chemical nature of the fuel. digital.library.unt.edu/ark:/67531/metadc66168/
Some factors affecting fabrication and high-temperature strength of molybdenum disilicide
No Description digital.library.unt.edu/ark:/67531/metadc59153/
Some factors affecting the reproducibility of penetration and the cut-off of oil sprays for fuel-injection engines
This investigation was undertaken at the Langley Memorial Aeronautical Laboratory in connection with a general research on fuel-injection for aircraft. The purpose of the investigation was to determine the factors controlling the reproducibility of spray penetration and secondary discharges after cut-off. The development of single sprays from automatic injection valves was recorded by means of special high-speed photographic apparatus capable of taking 25 consecutive pictures of the moving spray at a rate of 4,000 per second. The effect of two types of injection valves, injection-valve tube length, initial pressure in the injection-valve tube, speed of the injection control mechanism, and time of spray cut-off, on the reproducibility of spray penetration, and on secondary discharges were investigated. It was found that neither type of injection valve materially affected spray reproducibility. The initial pressure in the injection-valve tube controlled the reproducibility of spray penetrations. An increase in the initial pressure or in the length of the injection-valve tube slightly increased the spray penetration within the limits of this investigation. The speed of the injection-control mechanism did not affect the penetration. Analysis of the results indicates that secondary discharges were caused in this apparatus by pressure waves initiated by the rapid opening of the cut-off valve. The secondary discharges were eliminated in this investigation by increasing the length of the injection-valve tube. (author). digital.library.unt.edu/ark:/67531/metadc65911/
Some factors affecting the stability and performance characteristics of canard aircraft configurations
No Description digital.library.unt.edu/ark:/67531/metadc64195/
Some factors affecting the static longitudinal and directional stability characteristics of supersonic aircraft configurations
Factors affecting static, longitudinal, and directional stability characteristics of supersonic aircraft configurations. digital.library.unt.edu/ark:/67531/metadc52997/
Some factors affecting the static longitudinal and directional stability characteristics of supersonic aircraft configurations
No Description digital.library.unt.edu/ark:/67531/metadc63505/
Some factors affecting the variation of pitching moment with sideslip of aircraft configurations
No Description digital.library.unt.edu/ark:/67531/metadc56867/
Some features of artificially thickened fully developed turbulent boundary layers with zero pressure gradient
Report gives an account of an investigation conducted to determine the feasibility of artificially thickening a turbulent boundary layer on a flat plate. A description is given of several methods used to thicken artificially the boundary layer. It is shown that it is possible to do substantial thickening and obtain a fully developed turbulent boundary layer, which is free from any distortions introduced by the thickening process, and, as such, is a suitable medium for fundamental research. digital.library.unt.edu/ark:/67531/metadc60468/
Some flight data for the chance vought regulus ii missile
No Description digital.library.unt.edu/ark:/67531/metadc53011/
Some flight measurements of pressure-distribution and boundary-layer characteristics in the presence of shock
No Description digital.library.unt.edu/ark:/67531/metadc57592/
Some flight measurements on pressure distribution during tail buffeting
No Description digital.library.unt.edu/ark:/67531/metadc61505/
Some fundamental aspects of nitric acid oxidants for rocket applications
No Description digital.library.unt.edu/ark:/67531/metadc59420/
Some fundamental considerations in regard to the use of power in landing an airplane
This note is concerned with the effect of power on landing speed and apparent maximum lift coefficient. It is shown that when secondary effects are neglected, the maximum available increase in lift due to power is equal to the thrust being developed. If the increase in lift due to power is expressed in coefficient form, very high values may be shown under conditions which, on analysis, are found to be wholly impracticable in flight. digital.library.unt.edu/ark:/67531/metadc54582/
Some fundamental similarities between boundary-layer flow at transonic and low speeds
No Description digital.library.unt.edu/ark:/67531/metadc54687/
Some German gliders of 1920-1923
No Description digital.library.unt.edu/ark:/67531/metadc277539/
Some ground measurements of the forces applied by pilots to a side-located aircraft controller
No Description digital.library.unt.edu/ark:/67531/metadc56913/
Some Haulage and Hoisting Hazards in Western Mines
Report issued by the U.S. Bureau of Mines discussing safety hazards in western mines. Mine hoisting and haulage accidents are presented. Accident prevention is also discussed. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67022/
Some ideas on racing seaplanes
This report presents the author's designs and construction of various seaplanes to raced in the Schneider Cup. The results of tests are presented as well as discussions of various structures like floats and wings. digital.library.unt.edu/ark:/67531/metadc63566/
Some impressions of the Paris Aero Show
No Description digital.library.unt.edu/ark:/67531/metadc65235/
Some information on the strength of thick-skin wings with multiweb and multipost stabilization
No Description digital.library.unt.edu/ark:/67531/metadc59683/
Some Innovations in Equipment For Scaling High Roofs and Mine Walls
Report issued by the U.S. Bureau of Mines describing the methods and equipment developed at the oil-shale mine near Rifle, Colorado. This report includes photographs and illustrations documenting this equipment. digital.library.unt.edu/ark:/67531/metadc38551/
Some interference effects that influence vertical-tail loads at supersonic speeds
Aerodynamic interference effects on effectiveness of aircraft vertical tail at supersonic speeds. digital.library.unt.edu/ark:/67531/metadc53047/
Some interference effects that influence vertical-tail loads at supersonic speeds
No Description digital.library.unt.edu/ark:/67531/metadc61556/
Some internal-flow characteristics of several axisymmetrical NACA 1-series nose air inlets at zero flight speed
No Description digital.library.unt.edu/ark:/67531/metadc62554/