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Syllabus of Clay Testing: Part 1

Description: From Introduction: "This presentation (pt. 1) is what might be termed a qualitative syllabus, in that uses only are indicated, no attempt being made to evaluate a clay quantitatively, that is, to grade for particular uses. In part 2, which is to follow, the work will be amplified both qualitatively and quantitatively. In the first, preliminary tests are made to eliminate from consideration all nonclay minerals or clay minerals containing such large amounts of impurities as to render them unfit … more
Date: 1943
Creator: Klinefelter, Theron A.; O'Meara, Robert G.; Gottlieb, Sidney & Truesdell, Glenn C.
Item Type: Refine your search to only Report
open access

Tail Buffeting

Description: "An approximate theory of buffeting is here presented, based on the assumption of harmonic disturbing forces. Two cases of buffeting are considered: namely, for a tail angle of attack greater and less than the stalling angle, respectively. On the basis of the tests conducted and the results of foreign investigators, a general analysis is given of the nature of the forced vibrations the possible load limits on the tail, and the methods of elimination of buffeting" (p. 1).
Date: February 1943
Creator: Abdrashitov, G.
Item Type: Refine your search to only Report
open access

Tank tests of a 1/8-size dynamic model of the PB2Y-3 airplane with increased power: NACA model 131

Description: Report presenting a study of the installation of 1800-horsepower engines in the PB2Y-3 airplane in place of the current 1200-horsepower engines. Stability and spray tests were made to determine the performance of the model on the water when tested at both the present and projected conditions of gross load and engine power. Results regarding aerodynamic tests and hydrodynamic tests are provided.
Date: June 1943
Creator: Bell, Joe W. & Havens, Robert F.
Item Type: Refine your search to only Report
open access

Temperature Coefficient of the Reproduction Factor for Different Lattice Arrangements

Description: The temperature coefficient is calculated for various lattice arrangements, taking into account the variation of [formula], suggested by Fermi. Four contributions are included: leakage, levelling of the dip in thermal neutron density in the lump, resonance absorption, and hardening of the neutrons as they penetrate a metal lump. The departure of neutron temperature from lattice temperature decreases the total coefficient. Values are given for 3 typical piles; in general, the larger the uranium … more
Date: February 10, 1943
Creator: Morrison, P.
Item Type: Refine your search to only Report
open access

Temperature Effect in Homogeneous Pile

Description: Some idealized considerations of the temperature field in the homogeneous pile are given. It is crudely estimated that the effective mean temperature rise of the pile to be used in calculating the k loss is something like 3/4 the rise in temperature of the slurry in passing through the pile.
Date: December 9, 1943
Creator: Young, Gale Jay
Item Type: Refine your search to only Report
open access

Tensile and Compressive Tests of Magnesium Alloy J-1 Sheet

Description: Note presenting tensile and compressive stress-strain curves, stress-deviation curves, and secant modulus-stress curves for longitudinal and transverse specimens of magnesium alloy J-1 sheets 0.032 and 0.102 inch thick. Significant differences were found between the tensile and compressive stress-strain curves and between the compressive stress-strain curves for the longitudinal and transverse questions.
Date: December 1943
Creator: Aitchison, C. S. & Miller, James A.
Item Type: Refine your search to only Report
open access

Test Data on the Shear Strength of Joints Assembled With Round-Head and Brazier-Head Rivets

Description: Report discusses data obtained from testing shear of joints riveted with round-head and brazier-head rivets. The tightness of the rivets is also compared for one value of rivet diameter. The load-displacement curves and comparison of load at various values of permanent displacement are presented for both types of rivets.
Date: June 1943
Creator: Mandel, Merven W. & Schuette, Evan H.
Item Type: Refine your search to only Report
open access

Tests in the NACA Two-Dimensional Low-Turbulence Tunnel of Airfoil Sections Designed to Have Small Pitching Moments and High Lift-Drag Ratios

Description: Bulletin presenting the development and testing of airfoil sections that have small or zero pitching-moment coefficients and high lift-drag ratios. Because the new airfoil sections have small pitching moments and low profile-drag coefficients at moderate lift coefficients, they may be suitable for use on the rotor blades of rotating-wing aircraft.
Date: September 1943
Creator: Tetervin, Neal
Item Type: Refine your search to only Report
open access

Tests of 10-Inch 24S-T Aluminum-Alloy Shear Panels With 1-1/2-Inch Holes

Description: Report discusses the results of testing on "10-inch shear panels of 24S-T aluminum alloy with 1.5 inch holes to determine the stress concentration at static rupture and the deformation characteristics" (from Summary). The strength of the perforated specimens is compared to the solid specimens and the critical stresses are computed. The stress at which permanent set occurs was also measured.
Date: June 1943
Creator: Kuhn, Paul & Levin, L. Ross
Item Type: Refine your search to only Report
open access

Tests of a 1/40-Scale Wing-Hull Model and a 1/10-Scale Float-Strut Model of the Hughes-Kaiser Cargo Airplane in the Two-Dimensional Low-Turbulence Pressure Tunnel

Description: Report presenting aerodynamic and hydrodynamic tests of a 1/10-scale wing-hull model and a 1/10-scale float-strut model of the proposed arrangement of the Hughes-Kaiser cargo airplane. The aerodynamic tests were made primarily to study the drag characteristics of these models as originally designed and to determine how the design could be improved. Results regarding the wing-hull model and float-strut model are provided.
Date: September 1943
Creator: Fullmer, Felicien F., Jr.
Item Type: Refine your search to only Report
open access

Tests of a dynamic model in NACA tank number 1 to determine the effect of length of afterbody, angle of afterbody keel, gross load, and a pointed step on landing and planning stability

Description: Report presenting testing in tank no. 1 to determine the effect of length of afterbody, angle of afterbody keel, and gross load on the limits of stable trims and landing characteristics of a model of a flying boat with conventional steps. The studies were made with four lengths of afterbody, four angles of afterbody keel, and five gross loads. Results regarding the trim limits of stability and landing stability are provided.
Date: March 1943
Creator: Land, Norman S. & Lina, Lindsay J.
Item Type: Refine your search to only Report
open access

Tests of Airfoils Designed to Delay the Compressibility Burble

Description: "Fundamental investigations of compressibility phenomena for airfoils have shown that serious adverse changes of aerodynamic characteristics occur as the local speed over the surface exceeds the local speed of sound. These adverse changes have been delayed to higher free-stream speeds by development of suitable airfoil shapes. The method of deriving such airfoil shapes is described, and aerodynamic data for a wide range of Mach numbers obtained from tests of these airfoils in the Langley 24-inc… more
Date: 1943
Creator: Stack, John
Item Type: Refine your search to only Report
open access

Tests of Aluminum-Alloy Stiffened-Sheet Specimens Cut From an Airplane Wing

Description: "The specimens used in the present tests were cut from an actual airplane wing of the stressed-skin type. The specimens thus obtained were not representative of the usual type of laboratory specimens because the stiffeners were not exactly parallel nor evenly spaced and, in one case, the skin consisted of pieces of sheet of different thicknesses. The test data obtained indicate that the buckling strain of stiffened curved sheet can be computed with reasonable accuracy by the equation given by W… more
Date: January 1943
Creator: Holt, Marshall
Item Type: Refine your search to only Report
open access

Tests of Exhaust Propulsion Nozzles

Description: "The thrust produced by a variety of exhaust stacks and nozzles, and the effect of these stacks and nozzles on the power of a single-cylinder R-2800 engine were investigated over a wide range of engine speeds and manifold pressures in a series of tests in the Pratt & Whitney experimental test department. From the data obtained it is possible to estimate the optimum form of nozzles and the available thrust for airplanes fitted with R-2800 engines under sea-level conditions" (p. 1).
Date: May 1943
Creator: Campbell, Paul J.
Item Type: Refine your search to only Report
open access

Tests of flat panels with four types of stiffeners

Description: Report presenting testing of fifty-one aluminum-alloy panels as flat-end columns. The test specimens included all possible combinations of two lengths, four stiffener spacings, and four stiffener designs, and were mostly in duplicate pairs. Results regarding the panel bending tests, panel compression tests, and column tests of individual stiffeners are provided.
Date: January 1943
Creator: Niles, Alfred S.
Item Type: Refine your search to only Report
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