UNT Libraries Government Documents Department - 296 Matching Results

Search Results

Results: 1 - 24 next
open access

Abnormal grain growth in M-252 and S-816 alloys

Description: Report discussing an experimental investigation was carried out on air- and vacuum-melted M-252 and S-816 alloys to find conditions of heating and hot-working which resulted in abnormal grain growth. The experiments were mainly limited to normal conditions of heating for hot-working and heat treatment and normal temperatures of solution treatment were used to allow grain growth after susceptibility to abnormal grain growth was developed by various experimental conditions. Results indicated that… more
Date: November 1957
Creator: Decker, R. F.; Rush, A. I.; Dano, A. G. & Freeman, J. W.
Item Type: Refine your search to only Report
open access

Analysis of operational airline data to show the effects of airborne weather radar on the gust loads and operating practices of twin-engine short-haul transport airplanes

Description: From Introduction: "The data for operations both with and without radar installed have been analyzed and the results are presented in this paper. Although these results are of limited extent, they provide a basis for early examination of any trends in the gust loads and associated operating practices which might be attributed to the use of radar."
Date: November 1957
Creator: Copp, Martin R. & Walker, Walter G.
Item Type: Refine your search to only Report
open access

Atmospheric temperature observations to 100,000 feet for several climatological regions of the Northern Hemisphere

Description: Report presenting radiosonde measurements of upper-air temperatures taken over a 5-year period at nine stations in the northern hemisphere are summarized in order to provide information on the temperatures likely to be encountered during airplane and missile operations up to 100,000 feet.
Date: November 1957
Creator: Tolefson, H. B.
Item Type: Refine your search to only Report
open access

Development of a piston-compressor type light-gas gun for the launching of free-flight models at high velocity

Description: Report presenting testing of missiles in which temperatures are approximated and aerodynamic heating of the model is representative of that experienced by the missile in high-velocity flight. The paper describes a piston compressor type of light-gas gun, which shows good agreement between predictions of performance charts and experimental data.
Date: November 1957
Creator: Charters, A. C.; Denardo, B. Pat & Rossow, Vernon J.
Item Type: Refine your search to only Report
open access

Fatigue Investigation of Full-Scale Transport-Airplane Wings: Variable-Amplitude Tests with a Gust-Loads Spectrum

Description: Report presenting results of simulated flight-history testing, which is part of a research program on the fatigue strength of the wings of C-46 airplanes. Testing was conducted using a forced-vibration method, in which a spectrum of loads derived from gust-frequency statistics was used. Results regarding crack initiation and classification, fatigue-crack propagation, final failure, and a lifetime comparison are provided.
Date: November 1957
Creator: Whaley, Richard E.
Item Type: Refine your search to only Report
open access

Investigation of deflectors as gust alleviators on a 0.09-scale model of the Bell X-5 airplane with various wing sweep angles from 20 degrees to 60 degrees at Mach numbers from 0.40 to 0.90

Description: Report presenting an investigation in the high-speed 7- by 10-foot tunnel to determine the effectiveness of a given deflector arrangement as a gust alleviator on a model of the Bell X-5 airplane with various wing sweep angles, Mach numbers, and angles of attack. Results regarding lift, drag, and pitching moment are provided.
Date: November 1957
Creator: Croom, Delwin R. & Huffman, Jarrett K.
Item Type: Refine your search to only Report
open access

Investigation of the compressive strength and creep of 7075-T6 aluminum-alloy plates at elevated temperatures

Description: From Summary: "Elevated-temperature compressive-strength test results form room temperature to 600 degrees Fahrenheit and creep test results from 350 degrees Fahrenheit to 500 degrees Fahrenheit are presented for V-groove edge-supported plates of 7075-T6 aluminum alloy. The test data are compared with calculations obtained from procedures for estimating maximum strength from material stress-strain curves and creep-failure stresses from isochronous stress-strain curves. The strength and creep re… more
Date: November 1957
Creator: Deveikis, William D.
Item Type: Refine your search to only Report
open access

Measurement of Static Pressure on Aircraft

Description: Note presenting existing data on the errors involved in the measurement of static pressure by means of static-pressure tubes and fuselage vents. The errors associated with the various design features of static-pressure tubes are discussed for the condition of zero angle of attack and for the case where the tube is inclined to the flow.
Date: November 1957
Creator: Gracey, William
Item Type: Refine your search to only Report
open access

Momentum Transfer for Flow Over a Flat Plate with Blowing

Description: Note presenting a study of the effect on the boundary layer of blowing air through a porous flat plate into a main airstream flowing parallel to the plate. Measurements were made of velocity profiles and wall friction coefficients. The observed friction coefficients are predicted by mixture-length theory if the Reynolds number at the outer edge of the laminar sublayer is permitted to vary with the dimensionless ratio.
Date: November 1957
Creator: Mickley, H. S. & Davis, R. S.
Item Type: Refine your search to only Report
open access

Some Ground Measurements of the Forces Applied by Pilots to a Side-Located Aircraft Controller

Description: Report presenting ground testing to determine pilots' force capabilities on a proposed side-loaded aircraft controller on one side of the cockpit and situated so the pilot's arm is supported. Data were obtained from 11 pilots, including five research pilots and six research engineers. Results regarding the force levels and operating range of the controller, deviations in data, effect of arm position, and need for additional testing are provided.
Date: November 1957
Creator: Brissenden, Roy F.
Item Type: Refine your search to only Report
open access

Study of Some Burner Cross-Section Changes That Increase Space-Heating Rates

Description: Note presenting measurements of turbulent flame speeds and space-heating rates, which were made in a 1/2- by 2-inch glass-walled burner in which area blockage was introduced. Results regarding the effects of fuel-air ratio and velocity variation, effect of restriction shapes, effect of flameholder size without downstream restriction, heat-release rates, flame blowout and interruption by restrictions, flow tracer study, and shadow and direct photographs of the flame are provided.
Date: November 1957
Creator: Boldman, Donald R. & Blackshear, Perry L., Jr.
Item Type: Refine your search to only Report
open access

Aerodynamic characteristics and flying qualities of a tailless triangular-wing airplane configuration as obtained from flights of rocket-propelled models at transonic and supersonic speeds

Description: Report discussing a flight investigation of rocket-powered models of a tailless triangular-wing airplane configuration was made through the transonic and low supersonic speed range at the Langley Pilotless Aircraft Research Station at Wallops Island, Va. An analysis of the aerodynamic coefficients, stability derivatives, and flying qualities based on the results obtained from the successful flight tests of three models is presented.
Date: November 1956
Creator: Mitcham, Grady L.; Stevens, Joseph E. & Norris, Harry P.
Item Type: Refine your search to only Report
open access

Analysis of elastic thermal stresses in thin plate with spanwise and chordwise variations of temperature and thickness

Description: From Introduction: "The object of the present paper is to present an approximate method for calculating accurately the thermal stresses in a thin plate with both chordwise and spanwise variations in temperature and chordwise but restricted spanwise variations in thickness."
Date: November 1956
Creator: Mendelson, Alexander & Hirschberg, Marvin
Item Type: Refine your search to only Report
open access

Analysis of particle motions for a class of three-dimensional incompressible laminar boundary layers

Description: From Introduction: "Results obtained in the experimental investigations of secondary flows in turbomachines (refs. 1 to 3) indicate that information concerning three-dimensional laminar boundary-layer behavior can be of practical value in interpreting and correlating measurements of losses in the turbo-machines for design purposes. Reference 4 gives a theoretical analysis of the overturning (more than mainstream turning) of the three-dimensional laminar boundary layer developed on flat or nearl… more
Date: November 1956
Creator: Hansen, Arthur G. & Herzig, Howard Z.
Item Type: Refine your search to only Report
open access

Comparison of theoretical stresses and deflections of multicell wings with experimental results obtained from plastic models

Description: The experimental deflections and stresses of six plastic multicell-wing models of unswept, delta, and swept plan form are presented and compared with previously published theoretical results obtained by the electrical analog method. The comparisons indicate that the theory is reliable except for the evaluation of stresses in the vicinity of the leading edge of delta wings and the leading and trailing edges of swept wings. The stresses in these regions are questionable, apparently because of sim… more
Date: November 1956
Creator: Zender, George W.
Item Type: Refine your search to only Report
open access

Compressive stress-strain properties of 2024-T3 aluminum-alloy sheet at elevated temperatures

Description: Report presenting compressive stress-strain test results for 2024-T3 aluminum-alloy sheet for temperatures ranging from room temperature to 700 degrees Fahrenheit and for exposure times from 0.1 to 100 hours. Results regarding experimental test data, prediction of time-temperature combinations that produce maximum yield stress, and master compressive-yield-stress curve are provided.
Date: November 1956
Creator: Mathauser, Eldon E.
Item Type: Refine your search to only Report
open access

Compressive stress-strain properties of 7075-T6 aluminum-alloy sheet at elevated temperatures

Description: Report presenting compressive stress-strain testing for 7075-T6 aluminum alloy sheets at temperatures ranging from room temperature to 700 degrees Fahrenheit and exposure times from 0.1 to 100 hours. Results regarding the test results and master compressive-yield-stress curve are provided.
Date: November 1956
Creator: Mathauser, Eldon E.
Item Type: Refine your search to only Report
open access

Crash Injury

Description: "Data from full-scale experimental airplane crashes were studied to determine how impact injuries occur and how the chance of such injuries may be reduced. The following hazards were considered: (1) being crushed, (2) being struck by missiles, (3) striking objects by tearing loose or flailing about, and (4) being injured by the crash decelerations. Transport, cargo, fighter, and light airplane crashes were studied" (p. 1).
Date: November 1956
Creator: Pesman, Gerard J. & Eiband, A. Martin
Item Type: Refine your search to only Report
open access

Drag interference between a pointed cylindrical body and triangular wings of various aspect ratios at Mach numbers of 1.50 and 2.02

Description: The drag of a body alone, six triangular wings of various aspect ratios, and the combinations were measured at Mach numbers of 1.50 and 2.02 at a Reynolds number of 5.5 million (based on the body length). The experimental drag-interference results were in accordance with calculations based on NACA RM A9E19, 1949, with skin-friction effects taken into account, the interference effect being principally the result of fixing transition on the body by adding a wing.
Date: November 1956
Creator: Katzen, Elliott D. & Kaattari, George E.
Item Type: Refine your search to only Report
open access

Experimental Investigation at Low Speed of the Effects of Wing Position on the Static Stability of Models Having Fuselages of Various Cross Section and Unswept and 45 Degrees Sweptback Surfaces

Description: Note presenting an investigation to determine the effects of wing position on the low-speed static longitudinal and static lateral stability of airplane models with fuselages of square and rectangular cross sections and unswept and 45 degree sweptback surfaces. The results of the investigation indicated that at low angles of attack, the complete unswept models with the wing in the high position were more stable or least longitudinally unstable. The results also showed that wing-fuselage interfe… more
Date: November 1956
Creator: Letko, William
Item Type: Refine your search to only Report
open access

Investigation of heat transfer from a stationary and rotating ellipsoidal forebody of fineness ratio 3

Description: From Summary: "The convective heat transfer from the surface of an ellipsoidal forebody of fineness ratio 3 and 20-inch maximum diameter was investigated in clear air for both stationary and rotating operation over a range of conditions including air speeds up to 240 knots, rotational speeds up to 1200 rpm, and angles of attack of 0 deg, 3 deg, and 6 deg. The results are presented in the form of heat-transfer coefficients and the correlation of Nusselt and Reynolds numbers. Both a uniform surfa… more
Date: November 1956
Creator: Lewis, James P. & Ruggeri, Robert S.
Item Type: Refine your search to only Report
open access

A method for calculation of free-space sound pressures near a propeller in flight including considerations of the chordwise blade loading

Description: This report presents tabulated values of certain definite integral that are involved in the calculation of near-field propeller noise when the chordwise forces are assumed to be either uniform or of a Dirac delta type. The tabulations are over a wide range of operating conditions and are useful for estimating propeller noise when either the concept of an effective radius or radial distributions of forces are considered. Use of the tabulations is illustrated by several examples of calculated res… more
Date: November 1956
Creator: Watkins, Charles E. & Durling, Barbara J.
Item Type: Refine your search to only Report
Back to Top of Screen