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Accelerations in Transport-Airplane Crashes
From Introduction: "A study of crash-impact survival in light airplanes is reported in references 1 and 2. A similar study for fighter airplanes is reported in reference 3. This report discusses crash-impact survival in transport airplanes."
Date:
February 1958
Creator:
Preston, G. Merritt & Pesman, Gerard J.
System:
The UNT Digital Library
An accurate and rapid method for the design of supersonic nozzles
From Introduction: "This report presents a computational procedure which provides for the rapid and accurate calculation of any streamline in a series of special flows. Detailed information is given on the boundary conditions and equations used for computing the characteristic nets and stream function."
Date:
February 1955
Creator:
Beckwith, Ivan E. & Moore, John A.
System:
The UNT Digital Library
The Aerodynamic Characteristics of Airfoils at Negative Angles of Attack
From Introduction: "The present report gives all the results, including those published in reference 1 and the results of previously un-published tests tests of the airfoils at positive angles of attack."
Date:
February 26, 1932
Creator:
Anderson, Raymond F.
System:
The UNT Digital Library
Aerodynamic Characteristics of Anemometer Cups
From Introduction: "The investigation was intended to cover the characteristics of individual cups and of similar cups mounted on complete cup wheals. This report treats the static tests run on the individual cups."
Date:
February 1934
Creator:
Brevoort, M. J. & Joyner, U. T.
System:
The UNT Digital Library
The aerodynamic characteristics of three tapered airfoils tested in the variable density wind tunnel
From Summary: "This report contains the lift, drag, and moment characteristics of tapered Clark Y, Gottingen 393, and USA 45 airfoils as obtained from tests made in the Variable Density Wind Tunnel of the NACA. The results are given at both low and high Reynolds Numbers to show scale effect and to provide data for use in airplane design."
Date:
February 1931
Creator:
Anderson, Raymond F.
System:
The UNT Digital Library
Aerodynamic Effects Caused by Icing of an Unswept NACA 65A004 Airfoil
From Summary: "The effects of ice formations on the section lift, drag, and pitching-moment coefficients of an unswept NACA 65A004 airfoil section of 6-foot chord were studied.. The magnitude of the aerodynamic penalties was primarily a function of the shape and size of the ice formation near the leading edge of the airfoil. The exact size and shape of the ice formations were determined photographically and found to be complex functions of the operating and icing conditions."
Date:
February 1958
Creator:
Gray, Vernon H. & von Glahn, Uwe H.
System:
The UNT Digital Library
The Aerodynamic Forces and Moments on a Spinning Model of the F4B-2 Airplane as Measured by the Spinning Balance
"The tests described in this report were made as part of an investigation of the spinning characteristics of the F4B-2 airplane conducted at the request of the Bureau of Aeronautics, Navy Department" (p. 1).
Date:
February 1935
Creator:
Bamber, M. J. & Zimmerman, C. H.
System:
The UNT Digital Library
Air force and three moments for F-5-L Seaplane
From Introduction: "A model of the F-5-L seaplane was made, verified, and tested at 40 miles an hour in the 8' x 8' tunnel for lift and drag, also for pitching, yawing and rolling moments. Subsequently, the yawing moment test was repeated with a modified fin. The results are reported without VL scale correction."
Date:
February 1922
Creator:
unknown
System:
The UNT Digital Library
The Air Propeller, Its Strength and Correct Shape
It is possible to give a propeller such a shape that, under given conditions, viz., a definite speed of revolution and flying speed, the bending stresses in the blades will assume quite an insignificant magnitude.
Date:
February 1923
Creator:
Dietsius, H.
System:
The UNT Digital Library
An airborne indicator for measuring vertical velocity of airplanes at wheel contact
From Introduction: "The purpose of this paper is to describe one of the means developed for measuring this quantity on a given airplane type- a trailing arm with wheel. A prototype velocity indicator was tested in the Langley impact basin to determine its accuracy. A description of the operation of this type of vertical-velocity indicator, the results of the impact-basin and flight tests, and general evaluation of the indicator are presented herein."
Date:
February 1953
Creator:
Dreher, Robert C.
System:
The UNT Digital Library
Analysis of accelerations, gust velocities, and airspeeds from operations of a twin-engine transport airplane on a transcontinental route from 1950 to 1952
Report presenting time-history data obtained from one type of twin-engine transport airplane during two years of operations on a transcontinental route, which is analyzed in order to determine the magnitude and frequency of occurrence of gust accelerations, gust velocities, and associated airspeeds and altitudes. The gusts were found to be in good agreement with those previously reported for another type of twin-engine transport airplane.
Date:
February 1955
Creator:
Coleman, Thomas L. & Walker, Walter G.
System:
The UNT Digital Library
Analysis of accuracy of gas-filled bellows for sensing gas density
From Summary: "An analysis is presented of the characteristics of gas-filled bellows for sensing gas density to delineate the factors that affect the accuracy of this type of bellows."
Date:
February 1948
Creator:
Otto, Edward W.
System:
The UNT Digital Library
Analysis of behavior of simply supported flat plates compressed beyond the buckling load into the plastic range
From Summary and Introduction: "An analysis is presented of the postbuckling behavior of a simply supported square flat plate with straight edges compressed beyond the buckling load into the plastic range. The method of analysis involves the application of a variational principle of the deformation theory of plasticity in conjunction with computations carried out on a high-speed calculating machine. The results of the analysis are presented in the form of curves showing the variation of deformations, stress distribution, average compressive stress, and effective width with the applied unit shortening."
Date:
February 1955
Creator:
Mayers, J. & Budiansky, Bernard
System:
The UNT Digital Library
An Analysis of Laminar Free-Convection Flow and Heat Transfer About a Flat Plate Parallel to the Direction of the Generating Body Force
From Introduction: "The problem of free-convection flow as produced by a body force about a flat plate in the direction of the body force was studied at the NACA Lewis laboratory and is treated in a formal and more general manner herein. The method used is somewhat similar to that used in reference 4 wherein consideration was given to the free-convection flow at high Grashof numbers in a horizontal cylinder which had a variable surface-temperature distribution. In addition, the numerical solutions of references 2 and 3 are herein extended to cover a more complete range of variables."
Date:
February 1952
Creator:
Ostrach, Simon
System:
The UNT Digital Library
An Analysis of Statically Indeterminate Trusses Having Members Stressed Beyond the Proportional Limit
"A procedure for analyzing statically indeterminate trusses in the plastic stress range is presented which is applicable to trusses having any number of redundant members. A numerical example is used to illustrate the procedure" (p. 1).
Date:
February 1953
Creator:
Wilder, Thomas W., III
System:
The UNT Digital Library
An analysis of the turbulent boundary-layer characteristics on a flat plate with distributed light-gas injection
From Introduction: "The present paper is concerned with a transpiration cooling system in which the coolant passes through the surface it is protecting before entering the surrounding boundary layer. Analyses and experiments have been performed to determine the effect of distributed air transportation through flat surfaces over which air flows in turbulent boundary layer (refs. 2, 3, and 4)."
Date:
February 1958
Creator:
Rubesin, Morris W. & Pappas, Constantine C.
System:
The UNT Digital Library
Analytical and Experimental Investigation of Fully Developed Turbulent Flow of Air in a Smooth Tube With Heat Transfer With Variable Fluid Properties
Note presenting tests to determine local heat-transfer coefficients and friction factors for fully developed turbulent flow of air in a smooth electrically heated tube with an inside diameter of 0.87 inch and a length of 87 inches. Testing occurred at high ratios of wall to fluid bulk temperatures. Results regarding the predicted temperature and velocity distributions, Nusslet numbers, friction factors, velocity distributions, and temperature distributions are provided.
Date:
February 1952
Creator:
Deissler, R. G. & Eian, C. S.
System:
The UNT Digital Library
An Analytical and Experimental Investigation of the Skin Friction of the Turbulent Boundary Layer on a Flat Plate at Supersonic Speeds
Report presenting a review of turbulent-boundary-layer analyses and experimental data for average skin-friction coefficients on a flat plate in high-speed flow. New solutions are presented which show the effect of using a continuous velocity gradient and the effect of the extent of the laminar sublayer on the average skin-friction coefficient.
Date:
February 1951
Creator:
Rubesin, Morris W.; Maydew, Randall C. & Varga, Steven A.
System:
The UNT Digital Library
Apparent Effect of Inlet Temperature on Adiabatic Efficiency of Centrifugal Compressors
From Introduction: "The results of varying only Reynolds number for several equivalent tip speeds are presented and probable reasons for the apparent variation of adiabatic efficiency with inlet temperature are discussed."
Date:
February 1948
Creator:
Anderson, Robert J.; Ritter, William K. & Parsons, Shirley R.
System:
The UNT Digital Library
The application of airfoil studies to helicopter rotor design
From Summary: "In order to facilitate the application of miscellaneous airfoil data to the problems of the helicopter designer, a discussion of a number of the problems most frequently arising is presented. A reference list of published papers on airfoil section characteristics (or their application) which experience has shown to be useful in connection with these helicopter problems is included."
Date:
February 1949
Creator:
Gustafson, F. B.
System:
The UNT Digital Library
An application of Falkner's surface-loading method to predictions of hinge-moment parameters for swept-back wings
Report presenting an application of the Falkner lifting-surface-theory method to predicting hinge-moment and lift parameters for sweptback plan forms in order to develop an analogue to the existing lifting-surface-theory procedure for prediction of these parameters on unswept plan forms. For two specific plan forms, the hinge-moment predictions based on the Falkner method were not in good agreement with experimental values.
Date:
February 1948
Creator:
Jones, Arthur L. & Sluder, Loma
System:
The UNT Digital Library
Application of linear analysis to an experimental investigation of a turbojet engine with proportional speed control
From Summary: "Results of an analytical and a sea-level experimental investigation of a turbojet engine with proportional speed control are presented."
Date:
February 1952
Creator:
Dandois, Marcel & Novik, David
System:
The UNT Digital Library
Application of the Analogy Between Water Flow With a Free Surface and Two-Dimensional Compressible Gas Flow
From Introduction: "The development of the measuring apparatus and techniques is presented herein. The application of the analogy to flows through nozzles and about circular cylinders at subsonic velocities extending into supercritical range is also presented."
Date:
February 1947
Creator:
Orlin, W. James; Lindner, Norman J. & Bitterly, Jack G.
System:
The UNT Digital Library
Approximate solution for streamlines about a lifting rotor having uniform loading and operating in hovering or low-speed vertical-ascent flight conditions
Report presenting that the usual assumption of a uniform vortex cylinder for the wake vortex structure of a uniformly loaded, lifting rotor operating in the hovering or low-speed vertical-ascent flight conditions does not yield useful results for induced velocities in the region about the periphery of the rotor.
Date:
February 1957
Creator:
Castles, Walter, Jr.
System:
The UNT Digital Library