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Analytical study of transmission of load from skin to stiffeners and rings of pressurized cabin structure

Description: From Introduction: "The investigations in this paper were made to obtain more generalized mathematical analyses of monocoque structure subjected to internal pressure. It is also assumed that the principle of superposition can be applied, so that stress analysis of a structure with combined internal pressure and external load can be made without excessive complication."
Date: October 1945
Creator: Pian, Theodore Hsueh-Huang
Item Type: Refine your search to only Report
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Applicability of Similarity Principles to Structural Models

Description: "A systematic account is given in part I of the use of dimensional analysis in constructing similarity conditions for models and structures. The analysis covers large deflections, buckling, plastic behavior, and materials with nonlinear stress-strain characteristics, as well as the simpler structural problems" (p. 1).
Date: July 1944
Creator: Goodier, J. N. & Thomson, W. T.
Item Type: Refine your search to only Report
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The application of airfoil studies to helicopter rotor design

Description: 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.
Item Type: Refine your search to only Report
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An application of Falkner's surface-loading method to predictions of hinge-moment parameters for swept-back wings

Description: 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
Item Type: Refine your search to only Report
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The application of high-temperature strain gauges to the measurement of vibratory stresses in gas-turbine buckets

Description: The feasibility of measuring the vibration in the buckets of a gas turbine under service conditions of speed and temperature was determined by use of a high temperature wire strain gauge cemented to a modified supercharger turbine bucket. A high-temperature wire strain gauge and the auxiliary mechanical and electrical equipment developed for the investigation are described.
Date: April 1947
Creator: Kemp, R. H.; Morgan, W. C. & Manson, S. S.
Item Type: Refine your search to only Report
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An application of lifting-surface theory to the prediction of angle-of-attack hinge-moment parameters for aspect ratio 4.5 wings

Description: Report presenting an investigation made of the angle-of-attack-type loading for an elliptical wing of aspect ratio 4.5 in an attempt to augment existing methods of prediction of finite span angle-of-attack hinge-moment parameters.
Date: September 1947
Creator: Jones, Arthur L.; Flanagan, Mildred G. & Sluder, Loma
Item Type: Refine your search to only Report
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Application of Radial-Equilibrium Condition to Axial-Flow Compressor and Turbine Design

Description: Note presenting some of the basic general equations governing the three-dimensional compressible flow of gas through a compressor or a turbine in terms of velocity components, total enthalpy, and entropy. The equations are applied to investigate the maximum compatible number of the radial variations of the gas properties between successive blade rows that a designer is free to specify.
Date: January 1949
Creator: Wu, Chung-Hua & Wolfenstein, Lincoln
Item Type: Refine your search to only Report
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An Application of Statistical Data in the Development of Gust-Load Criterions

Description: "In conjunction with assumptions concerning the proportion of time spent at various speeds, statistical gust data were used to determine gust load factors that could be exceeded a given number of times during the operational life of an airplane. The results indicated that present gust load factors might be considerably lowered in certain cases with a consequent decrease in structural weight. Modification of the present criterion, however, must await the accumulation of data not presently availa… more
Date: April 1947
Creator: Bland, Reginald B. & Reisert, T. D.
Item Type: Refine your search to only Report
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Application of Statistical Methods to Study of Gas-Turbine Blade Failures

Description: Note presenting an investigation conducted to determine the applicability of statistical methods as an approach to the evaluation of materials for use in gas turbines by determining the frequency distribution of time until failure of gas-turbine blades. Two wheels, each incorporating 142 inserted blades of a cast cobalt-base heat-resistant alloy, were tested. The results indicated that the time for first failure may not generally be taken as an accurate indication of the performance of the aver… more
Date: June 1948
Creator: Hoffman, Charles A. & Ault, G. Mervin
Item Type: Refine your search to only Report
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Application of the Analogy Between Water Flow With a Free Surface and Two-Dimensional Compressible Gas Flow

Description: 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.
Item Type: Refine your search to only Report
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Application of the linearized theory of supersonic flow to the estimation of control-surface characteristics

Description: Report presenting the use of known conical-flow solutions of the linearized equation for the velocity potential in supersonic flow as applied to the calculation of the characteristics of control surfaces. Solutions for the pressure distributions are obtained for control surfaces with hinge lines swept ahead or behind the Mach line when the control-surface trialing edge is swept ahead of the Mach line.
Date: March 1948
Creator: Frick, Charles W., Jr.
Item Type: Refine your search to only Report
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Application of the Method of Characteristics to Supersonic Rotational Flow

Description: Note presenting a system for calculating the physical properties of supersonic rotational flow with axial symmetry and supersonic rotational flow in a two-dimensional field as determined by use of the characteristics method. Practical use of the system is based on a step-by-step procedure that requires long numerical calculations. Some applications were made to determine the external and internal flow on bodies of revolution with axial symmetry.
Date: September 1946
Creator: Ferri, Antonio
Item Type: Refine your search to only Report
open access

Appreciation and determination of the hydrodynamic qualities of seaplanes

Description: Report presenting a summary of the hydrodynamic qualities of interest in the normal operation of a seaplane, established over a period of years by model testing and by some knowledge of full-size operation. Results regarding longitudinal stability and control, landing stability, seaworthiness, performances, and lateral stability and control are provided.
Date: May 1947
Creator: Parkinson, John B.
Item Type: Refine your search to only Report
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Appreciation and Prediction of Flying Qualities

Description: Note presenting a summary of some results of recent research that will aid the designers of an airplane in selecting or modifying a configuration to provide satisfactory stability and control characteristics. A discussion is given of the reasons for the requirements, of the factors involved in obtaining satisfactory flying qualities, and of the methods used in predicting the stability and control characteristics of the airplane.
Date: August 1948
Creator: Phillips, William Hewitt
Item Type: Refine your search to only Report
open access

An approximate determination of the lift of slender cylindrical bodies and wing-body combinations at very high supersonic speeds

Description: Report presenting a theory for very high supersonic flow as applied to determine a first approximation to the pressure distribution, lift, and drag due to lift for a slender cylindrical body of revolution and a wing-body combination. The method indicates that the flow effectively separates from the body before reaching the widest part of the cross section.
Date: October 1948
Creator: Ivey, H. Reese & Morrissette, Robert R.
Item Type: Refine your search to only Report
open access

Approximate Relations and Charts for Low-Speed Stability Derivatives of Swept Wings

Description: Contains derivations, based on a simplified theory, of approximate relations for low-speed stability derivatives of swept wings. Method accounts for the effects and, in most cases, taper ratio. Charts, based on the derived relations, are presented for the stability derivatives of untapered swept wings. Calculated values of the derivatives are compared with experimental results.
Date: May 1948
Creator: Toll, Thomas A. & Queijo, M. J.
Item Type: Refine your search to only Report
open access

Approximate relations for hinge-moment parameters of control surfaces on swept wings at low Mach numbers

Description: Report presenting an approximate method of accounting for the effects of sweep as applied to previously determined equations for the hinge-moment parameters of control surfaces on unswept wings. Results regarding the comparison with experiment and limitations of the method are provided.
Date: October 1948
Creator: Toll, Thomas A. & Schneiter, Leslie E.
Item Type: Refine your search to only Report
open access

Artificial Aging of Riveted Joints Made in Alclad 24S-T Sheet Using A17S-T, 17S-T, and 24S-T Rivets

Description: Note presenting an investigation of the effect of artificial aging on the strengths of driven rivets of the alloys used commercially for rivets: specifically, A17S-T, 17S-T, and 24S-T. The change in shear strength for each type of rivet after being exposed to artificial aging treatment of 10 hours at 375 degrees Fahrenheit applied to the driven rivets is described.
Date: September 1944
Creator: Zamboky, A. N.
Item Type: Refine your search to only Report
open access

Axial Fatigue of 10 Airplane Wing-Beam Specimens by the Resonance Method

Description: Note presenting axial fatigue tests made by the resonance method on 10 specimens from airplane wing beams. The specimens contained several types of stress raiser, such as rivets, holes, fittings, splices, reinforcing plates, and so forth. The results show a greater fatigue stress concentration factor for the wing-beam specimens than for drilled coupons machined from the flanges or for parallel strip coupons containing idle rivets.
Date: December 1944
Creator: Brueggeman, W. C.; Krupen, P. & Roop, F. C.
Item Type: Refine your search to only Report
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