National Advisory Committee for Aeronautics (NACA) - 184 Matching Results

Search Results

Results: 1 - 24 next
open access

Determination of Shapes of Boattail Bodies of Revolution for Minimum Wave Drag

Description: "By use of an approximate equation for the wave drag of slender bodies of revolution in a supersonic flow field, the optimum shapes of certain boattail bodies are determined for minimum wave drag. The properties of three specific families of bodies are determined, the first family consisting of bodies having a given length and base area and a contour passing through a prescribed point between the nose and base, the second family having fixed length, base area, and maximum area, and the third fa… more
Date: August 21, 1951
Creator: Adams, Mac C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of the Experimental Pressure Distribution on an NACA 0012 Profile at High Speeds With That Calculated by the Relaxation Method

Description: Note presenting pressure-distribution measurements made on a 5-inch-chord NACA 0012 airfoil at zero angle of attack in the Langley rectangular high-speed tunnel, a 4- by 18-inch closed-throat tunnel, and compared with results calculated by Emmons for an equivalent airfoil-channel configuration by using the relaxation method.
Date: August 1950
Creator: Amick, James L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Charts Relating the Compressive Buckling Stress of Longitudinally Supported Plates to the Effective Deflectional and Rotational Stiffness of the Supports

Description: Report presenting a stability analysis of a long flat rectangular plate subjected to uniform longitudinal compressive stress and support along its longitudinal edges and one or more other longitudinal lines by elastic line supports. This was performed in order to provide more information about stabilization methods for thin-wing construction. The effective stiffness of different supports and the buckling observed in different structures is provided.
Date: August 1953
Creator: Anderson, Roger A. & Semonian, Joseph W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Stress-Solvent Crazing on Tensile Strength of Polymethyl Methacrylate

Description: Note presenting an investigation of the loss of strength of tensile specimens of polymethyl methacrylate as a result of stress-solvent crazing at 23 degrees Celsius and 50-percent relative humidity. the materials tested were commercial cast polymethyl-methacrylate sheets of both heat-resistant and ordinary grades from each of two manufacturers.
Date: August 1951
Creator: Axilrod, B. M. & Sherman, Martha A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Properties of aircraft fuels

Description: Report presenting a combination of two previously published reports with an extension of the data to cover properties of fuels up to temperatures as high as 400 degrees Fahrenheit.
Date: August 1956
Creator: Barnett, Henry C. & Hibbard, Robert R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A flight investigation of the effect of steady rolling on the natural frequencies of a body-tail combination

Description: Report presenting flight experiments with a freely falling model to observe the effects of steady rolling on the pitching and yawing motions of a body-tail combination. Steady rolling introduces yawing moments into the pitch oscillations and pitching motions into the yaw oscillations. Results regarding the experimental effects of steady-roll on no-roll natural frequencies, comparison of measured and experimental effects of steady rolling on the no-roll natural frequencies, and effects of roll a… more
Date: August 1953
Creator: Bergrun, Norman R. & Nickel, Paul A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Internal-Friction Study of Aluminum Alloy Containing 4 Weight Percent Copper

Description: Note presenting a study of aluminum alloy containing 4 weight percent copper during aging using low-frequency internal-friction measurements in torsional and flexural vibration. Both polycrystalline and single-crystal specimens exhibit an initial internal-friction peak at 173 degrees Celsius after solution treatment and quenching.
Date: August 1958
Creator: Berry, B. S. & Nowick, A. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Column Strength of H-Sections and Square Tubes in Postbuckling Range of Component Plates

Description: Note presenting a calculation of the column buckling stress in the range where the component plates have buckled using the method of split rigidities. Tests were carried out for a considerable range of slenderness ratios on three H-sections and two square tube sections.
Date: August 1953
Creator: Bijlaard, P. P. & Fisher, G. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of chemical reactivity of lubricant additives on friction and surface welding at high sliding velocities

Description: Report presenting an investigation of the effect of chemical reactivity of lubricant additives on friction at high sliding velocities. The investigation was conducted with a kinetic-friction apparatus consisting of an elastically restrained spherical rider specimen sliding on a rotating steel disk lubricated with cetane containing lubricant additives of different chemical reactivities. Results regarding chlorine compounds and sulfur compounds are provided.
Date: August 1950
Creator: Bisson, Edmond E.; Swikert, Max A. & Johnson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Driving Standing Waves by Heat Addition

Description: Note presenting types of burner instability and the role of standing waves in burners. The status of the problem of flame-driven standing waves is reviewed and a one-dimensional flow theory giving the mechanism whereby a flame drives or damps a standing wave is presented.
Date: August 1952
Creator: Blackshear, Perry L., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An investigation of aircraft heaters 36: preliminary investigation of a combustion-type aircraft heater

Description: Report presenting experimental results on the thermal performance of an aircraft combustion-type heater. The performance of the heater with a counterflow and a parallel-flow return passage on the gas side does not appear predictable by use of existing equations. The thermal conductance for the gases within the combustion chamber is predicted to be many times lower than the experimental data indicate.
Date: August 1951
Creator: Boelter, L. M. K.; Elswick, W. R.; Sanders, V. D. & Rubesin, M. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Investigation of Aircraft Heaters 34: Experimental Determination of Thermal and Hydrodynamical Behavior of Air Flowing Between a Flat and a Wave-Shaped Plate

Description: Report presenting an investigation of the thermal and hydrodynamical behavior of air flowing along a passage with one flat side, which was steam-heated, and one wave-shaped side, which was unheated. Two series of tests were conducted, one with the plates in direct opposition and one with the plates slightly separated, which induced turbulence upstream of the thermal boundary layer. Results regarding heat transfer and static-pressure drop are provided.
Date: August 1951
Creator: Boelter, L. M. K.; Sanders, V. D.; Young, G.; Morgan, M. & Morrin, E. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Free-Spinning-Tunnel Investigation of Gyroscopic Effects of Jet-Engine Rotating Parts (or of Rotating Propellers) on Spin and Spin Recovery

Description: Note presenting an investigation initiated in the 20-foot free-spinning tunnel to study the gyroscopic effects of jet-engine rotating parts on the erect spin and spin-recovery characteristics. A model of a military attack airplane was arbitrarily used and tests were made at basic and alternative loadings.
Date: August 1955
Creator: Bowman, James S., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characteristics of Four Nose Inlets as Measured at Mach Numbers Between 1.4 and 2.0

Description: Note presenting the pressure recovery, mass flow, and axial force of four bodies with nose inlets measured at Mach numbers between 1.4 and 2.0 and angles of attack of 0, 3, 6, and 9 degrees. The drag coefficients of axially symmetric diffusers operating at the maximum mass-flow rates were calculated from schileren photographs of the head shock waves and frictional drag considerations. Results regarding open-nose diffusers and conical-shock diffusers are provided.
Date: August 1956
Creator: Brajnikoff, George B. & Rogers, Arthur W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Critical Review of Notch Sensitivity in Stress-Rupture Tests

Description: Note presenting a review of English and German literature on notch stress-rupture data, which included the effect of notching on rupture strength in general, the effect of chemical composition and heat treatment on notch stress-rupture characteristics, the mechanism of stress-rupture embrittlement and notch sensitivity in low-alloy steels, and a comparison of the influence of notch geometry on notch strength in stress-rupture tests and in conventional tensile tests.
Date: August 1951
Creator: Brown, W. F., Jr. & Sachs, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Self-Balancing Line-Reversal Pyrometer

Description: Report presenting a description of a pyrometer that is self-balancing and is able to replace the two conventional manual operations of the line-reversal method. A description of the operation of the pyrometer and the performance and results are provided.
Date: August 1956
Creator: Buchele, Donald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The aerodynamic characteristics of an aspect-ratio-20 wing having thick airfoil sections and employing boundary-layer control by suction

Description: Report presenting an investigation to study the aerodynamic characteristics of an aspect-ratio-20 wing with thick airfoil sections and employing boundary-layer control by suction. The results include the effects of varying suction flow rate, suction-slot configuration, wing surface condition, flap deflection, and Mach number are provided.
Date: August 1953
Creator: Cocke, Bennie W., Jr.; Fink, Marvin P. & Gottlieb, Stanley M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An analysis of normal-acceleration and airspeed data from a four-engine type of transport airplane in commercial operation on an eastern united states route from November 1947 to February 1950

Description: Report presenting an analysis of 48,187 hours of normal-acceleration and airspeed data obtained on a four-engine type of transport airplane in commercial operation on an eastern United States route from November 1947 to February 1950 to determine gusts and gust loads for operations. Results regarding the presentation of data, effect of changes in operating conditions, effect of seasons, comparison with other results, reliability, acceleration, gusts, and airspeeds are provided.
Date: August 1953
Creator: Coleman, Thomas L. & Schumacher, Paul W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An analysis of the normal accelerations and airspeeds of a four-engine airplane type in postwar commercial transport operations on trans-Pacific and Caribbean-South American routes

Description: Report presenting an analysis of normal-acceleration and airspeed data on several transport airplanes of a four-engine type during postwar commerical operations on trans-Pacific and Caribbean-South American routes of the same airlines. The results indicate that the acceleration increment corresponding to the limit-gust-load-factor increment may be exceed about twice in all of the flight miles for each route. Results regarding accelerations, flight loads, gust encounters, and speeds are provided. more
Date: August 1950
Creator: Coleman, Thomas L. & Schumacher, Paul W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Turbojet Engine Noise Reduction With Mixing Nozzle-Ejector Combinations

Description: Note presenting tests of several noise suppressors consisting of combinations of mixing nozzles and ejectors on two full-scale turbojet engines. Maximum sound pressure level reductions of 12 decibels and sound power level reductions of 8 decibels were obtained. Acoustic results, jet mixing, and engine performance are provided.
Date: August 1958
Creator: Coles, Willard D.; Mihaloew, John A. & Callaghan, Edmund E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Interaction on Landing-Gear Behavior and Dynamic Loads in a Flexible Airplane Structure

Description: Note presenting the effects of interaction between a landing gear and a flexible airplane structure on the behavior of the landing gear and loads in the structure, which have been studied by treating the equations of motion of the airplane and the landing gear as a coupled system. Numerical calculations based on the structural properties of two large airplanes with considerably different mass and flexibility characteristics are presented.
Date: August 1955
Creator: Cook, Francis E. & Milwitzky, Benjamin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of a characteristic blade-to-blade solution to flow in a supersonic rotor with varying stream-filament thickness

Description: From Introduction: "A solution of the type of reference 2 is necessary to give the stream-sheet thickness and curvature for the blade-to-blade (S1 surface) solution considered in this report. The equations for the solution of the S1 surface of revolution are presented in reference 3. The purpose of the subject report is to continue the work of reference 3 by applying the method to a specific problem in order that the practicability of the method and the time involved in computing a solution may… more
Date: August 1953
Creator: Costilow, Eleanor L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen