Resource Type
Serial/Series Title
NACA Wartime Reports
310
NACA Advanced Restricted Reports
119
NACA Memorandum Reports
72
NACA Advanced Confidential Reports
70
Atomic Energy Commission Reports
60
NACA Technical Reports
47
CP (Series) (Chicago, Illinois)
46
Chicago University Reports
46
NACA Restricted Bulletins
42
NACA Technical Notes
41
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561 Matching Results
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553 - 561 of
561
On the General Theory of Thin Airfoils for Nonuniform Motion
"General thin-airfoil theory for a compressible fluid is formulated as boundary problem for the velocity potential, without recourse to the theory of vortex motion. On the basis of this formulation the integral equation of lifting-surface theory for an incompressible fluid is derived with the chordwise component of the fluid velocity at the airfoil as the function to be determined. It is shown how by integration by parts this integral equation can be transformed into the Biot-Savart theorem" (p. 1).
Date:
August 1944
Creator:
Reissner, Eric
Object Type:
Report
System:
The UNT Digital Library
Normal Pressure Tests on Unstiffened Flat Plates
"Flat sheet panels of aluminum alloy (all 17S-T except for two specimens of 24S-T) were tested under normal pressures with clamped edge supports in the structures laboratory of the Guggenheim Aeronautical Laboratory, California Institute of Technology. The thicknesses used ranged from 0.010 to 0.080 inch; the panel sizes ranged from 10 by 10 inches to 10 by 40 inches; and the pressure range was from 0 to 60-pounds-per-square-inch gage. Deflection patterns were measured and maximum tensile strains in the center of the panel were determined by electric strain gages" (p. 1).
Date:
September 1944
Creator:
Head, Richard M. & Sechler, Ernest J.
Object Type:
Report
System:
The UNT Digital Library
Effect of Curvature on Strength of Axially Loaded Sheet-Stringer Panels
Note presenting compressive testing made on twenty-one 24S-T aluminum-alloy sheet-stringer panels 12 inches in length and 16 inches in developed width, reinforced by four Z stringers spaced 4 inches apart. Results regarding strains, buckling, and failure are provided.
Date:
August 1944
Creator:
Ramberg, Walter; Levy, Samuel & Fienup, Kenneth L.
Object Type:
Report
System:
The UNT Digital Library
Simply Supported Long Rectangular Plate Under Combined Axial Load and Normal Pressure
Note presenting a solution for the load-strain curve of a simply supported rectangular plate with a width-length ratio of 1:4 under combined normal pressure and axial load. The results indicate it to be conservative design in the elastic range to neglect the effect of lateral pressure on the sheet buckling load and on the load carried by the sheet after buckling.
Date:
October 1944
Creator:
Levy, Samuel; Goldenberg, Daniel & Zibritosky, George
Object Type:
Report
System:
The UNT Digital Library
Artificial Aging of Riveted Joints Made in Alclad 24S-T Sheet Using A17S-T, 17S-T, and 24S-T Rivets
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.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Temperature on Sheet Metals for Airplane Firewalls
Note presenting tests conducted on 5 uncoated steels and 20 steels with various coatings to determine the effect of temperature on the tensile properties and surface characteristics of the metals. The metals were subjected to furnace-heating tests over a range of temperatures for various times and to flame-impingement and airplane-fire tests. Results regarding metals without surface coatings, low carbon steels with surface coatings, and discussion of comparative behaviors regarding the different surface coatings are provided.
Date:
December 1944
Creator:
Mutchler, Willard
Object Type:
Report
System:
The UNT Digital Library
Data on Material Properties and Panel Compressive Strength of a Plastic-Bonded Material of Glass Cloth and Canvas
Results are presented of tests for determining the tensile, compressive, and bending properties of a material of plastic-bonding glass cloth and canvas layers. In addition, 10 panel specimens were tested in compression. Although the material is not satisfactory for primary structural use in aircraft when compared on a strength-weight basis with other materials in common use, there appears to be potential strength in the material that will require research for development. These points are considered in some detail in the concluding discussion of the report. An appendix shows that a higher tensile strength can be obtained by changes in the type of weave used in the glass-cloth reinforcement.
Date:
December 1944
Creator:
Zender, George W.; Schuette, Evan H. & Weinberger, Robert A.
Object Type:
Report
System:
The UNT Digital Library
Tests of Airfoils Designed to Delay the Compressibility Burble
Note presenting a method of deriving certain airfoil shapes that delay certain compressibility phenomena, and the aerodynamic data for a wide range of Mach numbers obtained from tests of the airfoils in the 24-inch high-speed tunnel. The airfoils, which are designated the NACA 16-series, have increased critical Mach number. Results regarding the airfoil comparison, critical speed, minimum drag, and use of the data are provided.
Date:
December 1944
Creator:
Stack, John
Object Type:
Report
System:
The UNT Digital Library
Development of detonation detector suitable for use in flight
Report presenting an apparatus for making quantitative measurements of the vibrations excited by detonation in the cylinder head of an aircraft engine. The apparatus consisted of pick-up units, an amplifying system, and a cathode-ray oscillograph with a high-speed-camera recording system. A large number of records were taken under various operating conditions in a single-cylinder aircraft engine.
Date:
December 1944
Creator:
Draper, C. S.; Taylor, E. S.; Lancor, J. H. & Coffey, R. T.
Object Type:
Report
System:
The UNT Digital Library