UNT Libraries Government Documents Department - 195 Matching Results

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Tung production.

Description: Discusses planting, cultivating, and harvesting tung trees for oil production. Describes insect enemies and diseases.
Date: July 1957
Creator: Potter, George F. (George Frederick), b. 1891. & Crane, Harley Lucius, 1891-
Item Type: Refine your search to only Book
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Some Effects of Aileron Deflection on the Static Lateral and Directional Aerodynamic Characteristics of Four Contemporary Airplane Models

Description: Memorandum presenting some effects of aileron deflection on the static lateral and directional aerodynamic characteristics of four airplane models which are representative of aircraft capable of flight at supersonic speeds. The results are presented for subsonic Mach numbers ranging from 0.60 to 0.90 and for supersonic Mach numbers ranging from 1.20 to 1.90. They are limited to the most pertinent aerodynamic effects of ailerons contributing to the lateral and directional characteristics of each… more
Date: July 23, 1957
Creator: Smith, Willard G. & Intrieri, Peter F.
Item Type: Refine your search to only Report
open access

Wind-Tunnel Tests of the Static Longitudinal Characteristics at Low Speed of a Swept-Wing Airplane With Blowing Flaps and Leading-Edge Slats

Description: Memorandum presenting a wind-tunnel investigation of a high-wing airplane with an aspect ratio 6.75 wing with approximately 36 degrees of sweepback in order to determine the lift effectiveness obtainable with trailing-edge blowing flaps in combination with leading-edge slats. Close to theoretical flap effectiveness was obtained with blowing flaps deflected 45, 55, and 65 degrees at low angles of attack. Results regarding the wind tunnel, take-off performance, landing performance, and comparison… more
Date: July 5, 1957
Creator: James, Harry A. & Maki, Ralph L.
Item Type: Refine your search to only Report
open access

Comparative Study of Turbofan and Turbojet Engines

Description: Report presents a comparison of turbofan and turbojet engines for Mach numbers of up to 3.0 and conventional hydrocarbon fuels. There are four parts of the report: a cycle analysis of turbofan engines and information about their designs, a comparison of several commercial engines proposed for the Air Force, component performance and development problems for turbofan and turbojet engines, and a summary and conclusions based on mission studies.
Date: July 19, 1957
Creator: Kaufman, Harold R.; Benser, William A. & Gabriel, David S.
Item Type: Refine your search to only Report
open access

Transonic Flutter Characteristics of a Cambered A-Plan-Form Wing With and Without Simulated Nacelles

Description: Report presenting an experimental investigation to determine the effects of simulated engine nacelles on the flutter characteristics of a cambered A-plan-form wing with 45 degree sweepback of the leading edge, an aspect ratio of 3.6, and a taper ratio of 0.14. Results regarding a wing-mount fixed and a model with wing mount free are provided.
Date: July 10, 1957
Creator: Kelly, H. Neale
Item Type: Refine your search to only Report
open access

Handbook of Structural Stability Part 2: Buckling of Composite Elements

Description: "The local buckling of stiffener sections and the buckling of plates with sturdy stiffeners are reviewed, and the results are summarized in charts and tables. Numerical values of buckling coefficients are presented for longitudinally compressed stiffener sections of various shapes, for stiffened plates located in longitudinal compression and in shear, and for stiffened cylinders loaded in torsion. Although the data presented consist primarily of elastic-buckling coefficients, the effects of pla… more
Date: July 1957
Creator: Becker, Herbert
Item Type: Refine your search to only Report
open access

Investigation of a 0.6 Hub-Tip Radius-Ratio Transonic Turbine Designed for Secondary-Flow Study 2 - Design and Experimental Performance of Turbine With Low-Velocity-Turning Stator and Standard Rotor

Description: Memorandum presenting a low-velocity-turning stator designed to reduce secondary-flow loss cores by turning the flow at low velocities and accelerating it in passages of constant flow angle with reduced cross-channel pressure gradients. Performance of the stator was determined with static-pressure measurements and detailed surveys of total pressure and flow angle made with the turbine operating at design speed near design work.
Date: July 18, 1957
Creator: Rohlik, Harold E.; Wintucky, William T. & Scibbe, Herbert W.
Item Type: Refine your search to only Report
open access

Local Heat Transfer to Blunt Noses at High Supersonic Speeds

Description: Memorandum presenting a brief summary of the recent theoretical and experimental work on local heat-transfer rates on blunt-nose bodies. Results regarding the calculation of local flow conditions, prediction of stagnation-point heating rates, and calculation of heating rates over entire nose are provided.
Date: July 12, 1957
Creator: Stoney, William E., Jr.
Item Type: Refine your search to only Report
open access

Some Factors Affecting the Static Longitudinal and Directional Stability Characteristics of Supersonic Aircraft Configurations

Description: Memorandum presenting a survey of the problems introduced by the increased longitudinal stability and reduced directional stability of aircraft operating in the low supersonic speed range. Information regarding longitudinal stability and directional stability are provided.
Date: July 12, 1957
Creator: Spearman, M. Leroy
Item Type: Refine your search to only Report
open access

Aerodynamic Loads on Tails at High Angles of Attack and Sideslip

Description: "Results are presented for the loads and moments acting on the individual tail surfaces of a body-tail combination over a wide range of angles of attack and sideslip. The effects of forebody length and panel-panel interference on the characteristics are included. It is shown that large nonlinear variations in these loads and moments, which occur at some combinations of angle of attack and sideslip, cannot be predicted by low-angle theory" (p. 1).
Date: July 23, 1957
Creator: Spahr, J. Richard & Polhamus, Edward C.
Item Type: Refine your search to only Report
open access

Flutter Experiments With Various Control Configurations

Description: Report discussing the flutter characteristics of several control-surface configurations, including a wing with tip ailerons, an all-movable stabilizer, vertical tails with trailing-edge rudders, a t-tail, and some simple models of all-movable controls. Some trends of the configurations and suggestions for improving the flutter characteristics are provided.
Date: July 10, 1957
Creator: Boswinkle, Robert W., Jr. & Morgan, Homer G.
Item Type: Refine your search to only Report
open access

Calculation of External-Store Loads and Correlation With Experiment

Description: Memorandum presenting a theory for evaluating the mutual interference between a wing and tip tank as extended to apply to store-pylon configurations. By using the theory and the flow-field formulas of a previous report, theoretical store-pylon side-force estimates have been made for a number of store-pylon configurations. Results regarding the theory for store-pylon side force, scope of test configurations, contribution of store and pylon to combined load, effect of store spanwise location on t… more
Date: July 29, 1957
Creator: Bobbitt, Percy J.; Carlson, Harry W. & Pearson, Albin O.
Item Type: Refine your search to only Report
open access

The minimization of wave drag for wings and bodies with given base area or volume

Description: "The minimization of wave drag for thin aerodynamic shapes carrying no lift is studied for conditions under which either base area or volume is specified. When volume alone is given, the analysis is limited to shapes with straight trailing edges normal to the stream direction. The problem of minimization is reduced to one of finding a two-dimensional harmonic function with known boundary conditions" (p. 1).
Date: July 1957
Creator: Heaslet, Max A.
Item Type: Refine your search to only Report
open access

Elliptic Cones Alone and with Wings at Supersonic Speed

Description: "To help fill the gap in the knowledge of aerodynamics of shapes intermediate between bodies of revolution and flat triangular wings, force and moment characteristics for elliptic cones have been experimentally determined for Mach numbers of 1.97 and 2.94. Elliptic cones having cross-sectional axis ratios from 1 through 6 and with lengths and base areas equal to circular cones of fineness ratios 3.67 and 5 have been studied for angles of bank of 0 degree and 90 degrees. Elliptic and circular co… more
Date: July 17, 1957
Creator: Jorgensen, Leland H.
Item Type: Refine your search to only Report
open access

The Frequency Content of the Control Input and Airplane Response Obtained During Service Operations of Fighter Airplanes

Description: "The frequency content of the control input and resulting airplane motions is presented as power spectral densities for one operational flight of the fighter airplane (Republic F-84G). The frequency content, which is described by the shape of the spectrum, may be useful in providing inputs for the design of power control systems. For normal load factors, the results presented for the operational flight considered are in general agreement with the results of more complete data on three fighter a… more
Date: July 12, 1957
Creator: Mayer, John P. & Hamer, Harold A.
Item Type: Refine your search to only Report
open access

Experimental investigation of effects of moderate sideslip on the flow fields near a 45 degree swept-wing-fuselage combination at low speed

Description: The flow fields near a 45 degree swept-wing-fuselage combination at moderate angles of sideslip (plus-or-minus 8 degrees), as determined experimentally at low speed, are presented as variations with chordwise distance for various spanwise and vertical locations and angles of attack. The results indicated that for positions close to the fuselage (on and near the plane of symmetry) changes in the angle of sideslip caused large changes in the flow-field characteristics and particularly in the loca… more
Date: July 12, 1957
Creator: Alford, William J., Jr. & King, Thomas J., Jr.
Item Type: Refine your search to only Report
open access

Preliminary Internal Performance Data for a Variable-Ejector Assembly on the XJ79-GE-1 Turbojet Engine, 2, Afterburning Configurations

Description: Internal performance of an XJ79-GE-1 variable ejector was experimentally determined with the primary nozzle in two representative after-burning positions. Jet-thrust and air-handling data were obtained in quiescent air for 4 selected ejector configurations over a wide range of secondary to primary airflow ratios and primary-nozzle pressure ratios. The experimental ejector data are presented in both graphical and tabulated form.
Date: July 30, 1957
Creator: Bloomer, Harry E. & Groesbeck, Donald E.
Item Type: Refine your search to only Report
open access

Reflection and Refraction of Acoustic Waves by a Shock Wave

Description: "The presence of sound waves in one or the other of the fluid regions on either side of a shock wave is made apparent, in the region under superpressure, by acoustic waves (reflected or refracted according to whether the incident waves lie in the region of superpressure or of subpressure) and by thermal waves. The characteristics of these waves are calculated for a plane, progressive, and uniform incident wave. In the case of refraction, the refracted acoustic wave can, according to the inciden… more
Date: July 1957
Creator: Brillouin, J.
Item Type: Refine your search to only Report
open access

Performance Evaluation of Reduced-Chord Rotor Blading as Applied to J73 Two-Stage Turbine

Description: "The multistage turbine from the J73 turbojet engine has previously been investigated with standard and with reduced-chord rotor blading in order to determine the individual performance characteristics of each configuration over a range of over-all pressure ratio and speed. Because both turbine configurations exhibited peak efficiencies of over 90 percent, and because both units had relatively wide efficient operating ranges, it was considered of interest to determine the performance of the fir… more
Date: July 11, 1957
Creator: Schum, Harold J.
Item Type: Refine your search to only Report
open access

Effects of Thermal Relaxation and Specific-Heat Changes on Measurements With a Pneumatic-Probe Pyrometer

Description: "Equations are derived which evaluate the effects of thermal vibrational relaxation and specific-heat changes on pneumatic-probe pyrometer measurements in the region 1000 to 3000 degrees K and Mach numbers between 0.3 and 2.0. Examples are given for typical probes in two combustion mixtures" (p. 1).
Date: July 1957
Creator: Kuhns, P. W.
Item Type: Refine your search to only Report
open access

Preliminary investigation of propane combustion in a 3-inch-diameter duct of inlet-air temperatures of 1400 to 1600 F

Description: Report presenting a determination of ignition delays and combustion efficiencies for propane injected into a heated airstream. Two types of flames were observed for multipoint fuel injectors: a diffusion flame that stabilized at the injector orifices and an ignition-stabilized flame that formed a flame front downstream of the fuel injector. Results regarding combustion of injector-stabilized flames and combustion of ignition-stabilized flames are provided.
Date: July 1957
Creator: Lezberg, Erwin A.
Item Type: Refine your search to only Report
open access

Effects of airplane flexibility on wing bending strains in rough air

Description: "Some results on the effects of wing flexibility on wing bending strains as determined from flight tests of a Boeing B-29 and a Boeing B-47A airplane in rough air are presented. Results from an analytical study of the flexibility effects on the B-29 wing strains are compared with the experimental results. Both the experimental and calculated results are presented as frequency-response functions of the bending strains at various spanwise wing stations to gust disturbances. In addition, some indi… more
Date: July 1957
Creator: Coleman, Thomas L.; Press, Harry & Shufflebarger, C. C.
Item Type: Refine your search to only Report
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