UNT Libraries Government Documents Department - 176 Matching Results

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open access

Poultry keeping in backyards.

Description: Provides advice for keeping a small backyard poultry flock under a variety of conditions. Includes suggestions for choosing suitable breeds, housing, feeding, and sanitary requirements.
Date: January 1954
Creator: United States. Agricultural Research Service. Animal and Poultry Husbandry Research Branch.
Item Type: Refine your search to only Book
open access

Speed-Brake Investigation at Low Speed of a 1/10-Scale Model of the MX-1554A Airplane With a Circular Jet Nozzle

Description: Report discussing an investigation of the effect of curved speed brakes on the drag characteristics and longitudinal stability and control characteristics of a model of the MX-1554A with a circular jet nozzle. The speed brakes were tested at several deflections, gaps, and locations in the landing configuration and clean configuration. Results of a lateral- and directional-stability study due to reduction in the vertical tail area are also provided.
Date: January 7, 1954
Creator: Solomon, Martin
Item Type: Refine your search to only Report
open access

Preliminary Transient Performance Data on the Fuel Control of the XRJ47-W-5 Ram-Jet Engine

Description: Report discussing the characteristics of the fuel control of the 48-inch diameter WRJ47-W-5 ramjet engine, including the time history of the fuel system pressures, fuel flow, and engine inlet total pressure. Oscillograph traces for the different variables are provided as well as the accuracy of the calibration factors.
Date: January 29, 1954
Creator: Welna, Henry J. & Smith, Ivan D.
Item Type: Refine your search to only Report
open access

The Resistance to Air Flow of Porous Materials Suitable for Boundary-Layer-Control Applications Using Area Suction

Description: "Measurements were made of the resistance to air flow of commercially available porous materials. Three general types of porous media were tested - granular (sintered materials), fibrous (felt cloths and filter papers), and perforated. The flow-resistance characteristics of the porous materials tested are presented in a form intended to assist in the selection of materials for applications to boundary-layer control using area suction" (p. 1).
Date: January 1954
Creator: Dannenberg, Robert E.; Weiberg, James A. & Gambucci, Bruno J.
Item Type: Refine your search to only Report
open access

Summary of the Lift, Drag, and Stability of 1/10-Scale Rocket-Boosted Models of the McDonnell XF3H-1 Airplane for a Mach Number Range of 0.6 to 1.4 as Affected by the Operation of Extensible Rocket Racks

Description: Report discussing an investigation of the McDonnell XF3H-1 with models to determine the aerodynamic effects of operating internally stowed extensible rocket racks during transonic flight. Information about the flutter, static longitudinal stability, dynamic longitudinal stability, static directional stability, trim, drag, and effect of rocket racks on aerodynamic characteristics of the model is provided.
Date: January 26, 1954
Creator: Crabill, Norman L. & McFall, John C., Jr.
Item Type: Refine your search to only Report
open access

Effect of Several Jet-Engine Air-Inlet Configurations on the Low-Speed Static Longitudinal Stability Characteristics and Quantity Flow of a 1/6-Scale Model of the MX-1764 Airplane

Description: Memorandum presenting an investigation in the 7- by 10-foot tunnel to determine the effect of wing-root leading-edge and scoop-type jet-engine air-inlet configurations on the static longitudinal stability characteristics and the duct-flow characteristics of a scale model of the MX-1764 airplane. The addition of the inlet configurations to the model generally resulted in slight reductions in longitudinal stability and increases of maximum lift coefficient.
Date: January 12, 1954
Creator: Croom, Delwin R.
Item Type: Refine your search to only Report
open access

Comparison of Free-Flight Measurements of the Zero-Lift Drag Rise of Six Airplane Configurations and Their Equivalent Bodies of Revolution at Transonic Speeds

Description: "Free-flight drag measurements are presented which show the practicability of duplicating the zero-lift drag rise of many airplane configurations by simple bodies of revolution. The results confirm the transonic area rule for straight wings, and for delta and modified-delta wings with and without nacelles. The results showed that the area rule did not apply to one swept-wing configuration and an explanation is advanced to explain why it does not apply" (p. 1).
Date: January 5, 1954
Creator: Hall, James Rudyard
Item Type: Refine your search to only Report
open access

A New Method of Analyzing Extreme-Value Data

Description: Note presenting a method for analyzing extreme-value data which may arise in a wide variety of applications. Discussion of the method is preceded by the necessary statistical theory which also furnishes a basis for evaluating the new method in relation to existing ones. Several appendices are also included for mathematical developments not included in the text.
Date: January 1954
Creator: Lieblein, Julius
Item Type: Refine your search to only Report
open access

Lubricants of Reduced Flammability

Description: Report presenting information regarding lubricants of reduced flammability, including the determination of the change in spontaneous ignition temperature, stability testing, and a practical method for synthesizing them.
Date: January 1954
Creator: Frank, Charles E.; Swarts, Donald E. & Mecklenborg, Kenneth T.
Item Type: Refine your search to only Report
open access

Design Data for Multipost-Stiffened Wings in Bending

Description: From Summary: "The results of a computational program are presented which give numerical values of the stiffnesses required of the various components of a multipost-stiffened wing to achieve desired buckling-stress values under bending loads. Two arrangements of the posts are considered, upright posts and posts used as diagonals of a Warren truss. This work extends and summarizes the calculations presented in NACA RM L52K10a."
Date: January 1954
Creator: Anderson, Roger A.; Johnson, Aldie E., Jr. & Wilder, Thomas W., III
Item Type: Refine your search to only Report
open access

Static properties and resistance characteristics of a family of seaplane hulls having varying length-beam ratio

Description: Report presenting the static properties and resistance characteristics of a family of seaplane hulls with a variety of length-beam ratios. The hydrodynamic stability and rough-water behavior of the family of hulls has been reported on previously. Results regarding static properties, resistance characteristics, and take-off calculations are provided.
Date: January 1954
Creator: Carter, Arthur W. & Woodward, David R.
Item Type: Refine your search to only Report
open access

Investigation of mutual interference effects of several vertical-tail-fuselage configuration in sideslip

Description: Report presenting testing on three circular-arc-fuselage and nine unswept-vertical-tail models in order to investigate interference effects between fuselages and vertical tails in sideslip. Report presenting effectiveness of isolated vertical tails, effectiveness of vertical tail plus mutual interference of fuselage and vertical tail, interference of fuselage on vertical tail, interference of vertical tail on the fuselage, longitudinal position of center of pressure of combined loading, vertica… more
Date: January 1954
Creator: Michael, William H., Jr.
Item Type: Refine your search to only Report
open access

Creep Bending and Buckling of Linearly Viscoelastic Columns

Description: Note presenting the general dynamic equation of creep bending of a beam loaded laterally and axially as derived for a linearly viscoelastic material whose mechanical properties can be characterized by four parameters. The equation derived was used to obtain the creep bending deflection of a beam in pure bending and of a column with initial sinusoidal deviation from straightness.
Date: January 1954
Creator: Kempner, Joseph
Item Type: Refine your search to only Report
open access

Creep Bending and Buckling of Nonlinearly Viscoelastic Columns

Description: Note presenting differential equations of bending of an idealized H-section beam column derived for a nonlinearly viscoelasic material whose mechanical properties are analogous to a model consisting of a linear spring in series with a nonlinear dashpot whose strain rate is proportional to a power of the applied stress. The resulting constant stress or load creep curve consists of a straight line, the slope of which can be considered as the secondary creep rate of a real material.
Date: January 1954
Creator: Kempner, Joseph
Item Type: Refine your search to only Report
open access

Creep buckling of columns

Description: Report presenting formulas for the determination of the creep deflection-time characteristics of an initially curved idealized H-section column. The results were obtained from closed-form solutions of the differential equation of bending of a beam column with creep properties of a nonlinearly viscoelastic nature. Critical time is tabulated and plotted for a wide range of parameters involved.
Date: January 1954
Creator: Kempner, Joseph & Patel, Sharad A.
Item Type: Refine your search to only Report
open access

Time-Dependent Buckling of a Uniformly Heated Column

Description: Note presenting a theoretical investigation of the time-temperature-dependent buckling of a pin-jointed constant-section column, whose initial curvature is defined by a half-sine wave when the material is linearly viscoelastic and is heated uniformly along the column at a prescribed time rate.
Date: January 1954
Creator: Ness, Nathan
Item Type: Refine your search to only Report
open access

The resistance to air flow of porous materials suitable for boundary-layer-control applications using area suction

Description: "Measurements were made of the resistance to air flow of commercially available porous materials. Three general types of porous media were tested - granular (sintered materials), fibrous (felt cloths and filter papers), and perforated. The flow-resistance characteristics of the porous materials tested are presented in a form intended to assist in the selection of materials for applications to boundary-layer control using area suction" (p. 1).
Date: January 1954
Creator: Dannenberg, Robert E.; Weiberg, James A. & Gambucci, Bruno J.
Item Type: Refine your search to only Report
open access

A simplified mathematical model for calculating aerodynamic loading and downwash for wing-fuselage combinations with wings of arbitrary plan form

Description: Report presenting the calculation of aerodynamic loading on the fuselage by representing a midwing wing-fuselage combination with a fuselage of circular cross section with a simple system of horseshoe vortices located on the wing with images located inside the fuselage. Methods for calculating the downwash far behind the wing, the induced lift, and the spanwise lift distribution on the wing are provided.
Date: January 1954
Creator: Zlotnick, Martin & Robinson, Samuel W., Jr.
Item Type: Refine your search to only Report
open access

Elastic Buckling Under Combined Stresses of Flat Plates With Integral Waffle-Like Stiffening

Description: "Theory and experiment were compared and found in good agreement for the elastic buckling under combined stresses of long flat plates with integral waffle-like stiffening in a variety of configurations. For such flat plates, 45 degree waffle stiffening was found to be the most effective of the configurations for the proportions considered over the widest range of combinations of compression and shear" (p. 1).
Date: January 1954
Creator: Dow, Norris F.; Levin, L. Ross & Troutman, John L.
Item Type: Refine your search to only Report
open access

Method for calculation of compressible laminar boundary layer with axial pressure gradient and heat transfer

Description: Report presenting a rapid and sufficiently accurate method of determining laminar-boundary-layer characteristics in flow with a given free-stream Mach number and given velocity distribution at the edge of the boundary layer. The method can be easily applied to flow with zero pressure gradient for any constant Prandtl number of the order of unity and any given temperature distribution along wall.
Date: January 1954
Creator: Libby, Paul A. & Morduchow, Morris
Item Type: Refine your search to only Report
open access

A Substitute-Stringer Approach for Including Shear-Lag Effects in Box-Beam Vibrations

Description: Note presenting a discussion of the use of the substitute-stringer approach for including shear lag in the calculation of transverse modes and frequencies of box beams. The ratios used for the configurations presented in the report bracket those which would occur in most actual box beams.
Date: January 1954
Creator: Davenport, William W. & Kruszewski, Edwin T.
Item Type: Refine your search to only Report
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