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100 Areas technical activities report - physics, September 1946

Description: The Pine unit was down four times during the month. These were all regularly scheduled shutdowns. Times down vary from 16.9 hours to 19.2 hours. A total of 33.4 tons of metal was discharged. The galvano-meter chamber in experimental hole {open_quotes}A{close_quotes} was replaced. One Special Request was discharged and three tubes have been loaded with Special Request samples. A new bismuth column has been established. Some difficulty has been experienced with high temperatures of both tube exit… more
Date: October 9, 1946
Creator: Montgomery, E. B.
Item Type: Refine your search to only Report
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Altitude cooling investigation of the R-2800-21 engine in the P-47G airplane 2: investigation of the engine & airplane variables affecting the cylinder temperature distribution

Description: "The data obtained from cooling tests of an R-2800-21 engine installed in a P-47G airplane were studied to determine which engine and airplane operation variables were mainly responsible for the extremely uneven temperature distribution among the 18 engine cylinders obtained at the medium and high engine-power conditions. The tests consisted of flights at altitudes from 5000 to 35,000 feet for the normal range of engine and airplane operation. The results of the study showed that a flow conditi… more
Date: October 9, 1946
Creator: Pesman, Gerard J. & Kaufman, Samuel J.
Item Type: Refine your search to only Report
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Altitude cooling investigation of the R-2800-21 engine in the P-47g airplane 3: individual-cylinder temperature reduction by means of intake-pipe throttle and by coolant injection

Description: "Flight tests were conducted on a R-2800-21 engine in the P-47G airplane to determine the effect on the wall temperatures of cylinder 10 of throttling the charge in the intake pipe and of injecting a water-ethanol coolant into the intake pipe. Cylinder 10 was chosen for this investigation because it runs abnormally hot (head temperatures of the order of 45 F higher than those of the next hottest cylinder) at the medium and high-power conditions. Tests with interchanged cylinders showed that the… more
Date: October 9, 1946
Creator: Bell, E. Barton; Valerino, Michael F. & Manganiello, Eugene J.
Item Type: Refine your search to only Report
open access

Altitude-Wind-Tunnel Investigation of Oil-System Performance of XR-4360-8 Engine in XTB2D-1 Airplane

Description: "An investigation was conducted in the Cleveland altitude wind tunnel to determine the aerodynamic characteristics and the oil delivery critical altitude of the oil-cooler installation of an XTB2D-1 airplane. The investigation was made with the propeller removed end with the engine operating at 1800 brake horsepower, an altitude of 15,000 feet (except for tests of oil-delivery critical altitude), oil-cooler flap deflections from -20 degrees to 20 degrees and inclinations of the thrust axis of 0… more
Date: October 11, 1946
Creator: Conrad, E. William
Item Type: Refine your search to only Report
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Altitude-Wind-Tunnel Investigation of Performance of Several Propellers on YP-47M Airplane at High Blade Loading, 1, Aeroproducts H20C-162-X11M2 Four-Blade Propeller

Description: "An investigation was made in the Cleveland Altitude wind tunnel to determine the performance of an Aeroproducts H20C-162-X11M2 four-blade propeller on a YP-47M airplane at high blade loadings and high engine powers. The propeller characteristics were obtained for a range of power coefficients from 0.30 to 1.00 at free-stream Mach numbers of 0.40 and 0.50. The results of the force measurements are indicative only of trends in propeller efficiency with changes in power coefficient and advance-di… more
Date: October 11, 1946
Creator: Saari, Martin J. & Wallner, Lewis E.
Item Type: Refine your search to only Report
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Calibration Tunnel for High Speed

Description: "For the investigation of measuring instruments at higher speeds up to a Mach number 0.7 a tunnel with closed test section was built in 1942 which was as simple and cheap as possible. The blower was a radial blower with straight sheet vanes of 800-millimeter diameter the tips of which were bent backward a little. The blower sucks the air through a honeycomb of diameter 1.2 meter with wide meshes" (p. 1).
Date: October 1946
Creator: Pretsch, J.
Item Type: Refine your search to only Report
open access

Columbia River temperature study at 100-F Area

Description: In August 1946 it was discovered that two effluent lines near the Columbia River at Hanford were damaged. The upstream effluent line has broken off 37 fact from the shoreline and the downstream effluent line had been bent and partly broken seventeen feet from shoreline and has swung downstream to a point about 50 feet from shorelines. This study was made to determine how fast and in what fashion the temperature of the effluent water is dissipated in the Columbia River under the present conditio… more
Date: October 22, 1946
Creator: Lewis, W. R. & Rohrbacher, R. A.
Item Type: Refine your search to only Report
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Comparison of Normal Process and Single Process (XC) Uranium

Description: Certain difficulties have been encountered in attempts to substitute a 'one-step' casting process, developed at Iowa State College, for the 'normal' process generally used for the production of extrusion billets. In the 'one-step' process molten metal is delivered from the reduction bomb to the billet mold instead of allowing the metal to solidify in the bomb with subsequent vacuum remelting of the biscuit metal before casting in the billet mold. Routine analyses had failed to establish signifi… more
Date: October 7, 1946
Creator: Cleaves, H. E.
Item Type: Refine your search to only Report
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Cylinder-Temperature Correlation of a Single-Cylinder Liquid-Cooled Engine

Description: "An analysis based on nonboiling forced-convection heat-transfer theory is made of the cooling processes in liquid-cooled engine cylinders. Semiempirical equations that relate the average head and barrel temperatures with the primary engine and coolant parameters are derived. A correlation method based on these equations is applied to data obtained from previously reported investigations, which were conducted over large ranges of engine and coolant conditions with two liquid-cooled cylinders us… more
Date: October 1, 1946
Creator: Pinkel, Benjamin; Manganiello, Eugene J. & Bernardo, Everett
Item Type: Refine your search to only Report
open access

The Effects of Aerodynamic Heating and Heat Transfer on the Surface Temperature of a Body of Revolution in Steady Supersonic Flight

Description: "An approximate method for determining the convective cooling requirement in the laminar boundary-layer region of a body of revolution in high-speed flight was developed and applied to an example body. The cooling requirement for the example body was determined as a function of Mach number, altitude, size, and a surface-temperature parameter. The maximum value of Mach number considered was 3.0 and the altitudes considered were those within the lower constant-temperature region of the atmosphere… more
Date: October 14, 1946
Creator: Scherrer, Richard
Item Type: Refine your search to only Report
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The Fatigue Characteristics of Bolted Lap Joints of 24S-T Alclad Sheet Materials

Description: Report presenting fatigue testing to determine the effect of bolt fit on the lifetime of lap joints of 24S-T Alclad sheet of various thicknesses joined by steel bolts and designed for sheet failure under repeated loading. Results regarding joints with countersunk bolts, joints with bolts drawn to high initial torque, joints with bolts of different diameters, multibolt joints with nonuniform bolt fit, fatigue strength of the sheet material, friction in bolted lap joints, and bolt slip during tes… more
Date: October 1946
Creator: Jackson, L. R.; Wilson, W. M.; Moore, H. F. & Grover, H. J.
Item Type: Refine your search to only Report
open access

Flight and Test-Stand Investigation of High-Performance Fuels in Pratt & Whitney R-1830-94 Engines 4: Comparison of Cooling Characteristics of Flight and Test-Stand Engines

Description: "The cooling characteristics of three R-1830-94 engines, two of which were mounted in a test stand and the other in a B-24D airplane, were investigated and the results were compared. The flight tests were made at a pressure altitude of 7000 feet; the test-stand runs were made at ground-level atmospheric conditions. Three cooling runs were made for each engine: variable cooling-air pressure drop, variable carburetor-air flow, and variable fuel-air ratio" (p. 1).
Date: October 8, 1946
Creator: Dandois, Marcel & Werner, Milton
Item Type: Refine your search to only Report
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Flight Investigation of Effect of Various Vertical-Tail Modifications on the Directional Stability and Control Characteristics of the P-63A-1 Airplane (AAF No. 42-68889)

Description: "Because the results of preliminary flight tests had indicated the P-63A-1 airplane possessed insufficient directional stability, the NACA and the manufacturer (Bell Aircraft Corporation) suggested three vertical-tail modifications to remedy the deficiencies in the directional characteristics. These modifications included an enlarged vertical tail formed by adding a tip extension to the original vertical tail, a large sharp-edge ventral fin, and a small dorsal fin. The enlarged vertical tail in… more
Date: October 7, 1946
Creator: Johnson, Harold I.
Item Type: Refine your search to only Report
open access

Flight investigation of the cooling characteristics of a two-row radial engine installation 3: engine temperature distribution

Description: From Summary: "The temperature distribution of a two-row radial engine in a twin-engine airplane has been investigated in a series of flight tests. The test engine was operated over a wide range of conditions at density altitudes of 5000 and 20,000 feet; quantitative results are presented showing the effects of flight and engine variables upon average engine temperature and over-all temperature spread. Discussions of the effect of the variables on the shape of the temperature patterns and on th… more
Date: October 1946
Creator: Rennak, Robert M.; Messing, Wesley E. & Morgan, James E.
Item Type: Refine your search to only Report
open access

Flight measurements of the lateral control characteristics of narrow-chord ailerons on the trailing edge of a full-span slotted flap

Description: From Summary: "Results are presented of light tests made to determine the effect of flap deflection on the lateral control characteristics of a modified Brewster F2A-2 airplane equipped with partial-span narrow-chord ailerons on the trailing edge of a full-span NACA slotted flap. The investigation included determination of the rolling and yawing characteristics of the airplane in abrupt aileron rolls with the slotted flap at various settings ranging from 0 degree to about 40 degrees. The result… more
Date: October 25, 1946
Creator: Sawyer, Richard H.
Item Type: Refine your search to only Report
open access

Flight tests of an all-movable horizontal tail with geared unbalancing tabs on the Curtiss XP-42 airplane

Description: Report presenting flight tests of an all-movable tail with geared unbalancing tabs installed on the Curtiss XP-42 airplane. The control configuration used involved the pilot's stick connected directly to the tail and the tabs changed from servotabs to geared unbalancing tabs. Results regarding dynamic longitudinal stability and control, static longitudinal stability, elevator control, elevator hinge-moment characteristics, and elevator control in landing, in flight, and in spins are provided.
Date: October 1946
Creator: Kleckner, Harold F.
Item Type: Refine your search to only Report
open access

Flow Tests of an NACA-Designed Supercharger Inlet Elbow and the Effects of Various Components on the Flow Characteristics at the Elbow Outlet

Description: Note presenting an investigation on a supercharger inlet elbow designed to have a uniform velocity distribution at the outlet with a minimum pressure loss through the bend. The effects of a vane, an impeller-shaft housing, and the combination of the two on the outlet-velocity distribution and total pressure drop through the elbow were determined.
Date: October 1946
Creator: Guentert, D. C.; Todd, D. J. & Simmons, W. P., Jr.
Item Type: Refine your search to only Report
open access

Flutter and oscillating air-force calculations for an airfoil in a two-dimensional supersonic flow

Description: An account is given of the Possio theory of non stationary flow for small disturbances in a two-dimensional supersonic flow and of its application to determination of the aerodynamic forces on an oscillating airfoil. Further application is made to the problem of wing flutter in the degrees of freedom - torsion, bending, and aileron torsion. Numerical tables for flutter calculations are provided for numerous values of the Mach number greater than unity. Results for bending-torsion wing flutter a… more
Date: October 1946
Creator: Garrick, I. E. & Rubinow, S. I.
Item Type: Refine your search to only Report
open access

Graphite expansion committee meeting of October 4, 1946

Description: Recent data show that test hole samples out from the center of a bar show greater expansion rates than do samples out from the edge of a bar. The previously noticed irregularities in expansion of test hole samples are attributed to this phenomenon. For unexplained reasons, the expansion of the graphite piles is in close agreement with the smaller expansion rates shown by test hole samples rather than with the larger rates. It is recommended that the neoprene coal on the far side of the F pile b… more
Date: October 7, 1946
Creator: Woods, W. K.
Item Type: Refine your search to only Report
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The infrared spectra of spiropentane methylenecyclobutane and 2-methyl-1-butene

Description: The infrared spectra of spiropentane, methylenecyclobutane, and 2-methyl-1-butene were measured in the region from 3 to 14 microns with a rock salt prism spectrometer of medium dispersion. The pure samples were prepared at the NACA Cleveland Laboratory. The vapors of these three C5 hydrocarbons were investigated at room temperature and at pressures in the range from 80 to 300 millimeters of mercury absolute in a 10-centimeter cell. The spectra were compared with each other and with Ramon spectr… more
Date: October 1946
Creator: Cleaves, Alden P. & Sherrick, Mildred E.
Item Type: Refine your search to only Report
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