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Toluol Recovery
Description:
Technical paper issued by the Bureau of Standards over toluol-recovery, known as light oil. The methods used in the toluol-recovery are presented and discussed. This paper includes tables, and illustrations.
Date:
December 19, 1918
Creator:
McBride, R. S.; Reinicker, C. E. & Dunkley, W. A.
The Ultra-Violet and Visible Transmission of Various Colored Glasses
Description:
Technical paper issued by the Bureau of Standards over studies conducted on transmissions of ultra-violet energy through different colored glasses. As stated in the introduction, "in the present paper are given the transmissions for the visible and ultra-violet of a large number of glasses, mostly colored, which are not used primarily for eye protection, but which are useful for various other purposes" (p. 3). This paper includes illustrations, and photographs.
Date:
March 19, 1920
Creator:
Gibson, K. S.; Tyndall, E. P. T. & McNicholas, H. J.
Rolling Moments Due to Rolling and Yaw for Four Wing Models in Rotation
Description:
"This report presents the results of a series of autorotation and torque tests on four different rotating wing systems at various rates of roll and at several angles of yaw. The investigation covered an angle of attack range up to 90 degrees and angles of yaw of 0 degree, 5 degrees, 10 degrees, and 20 degrees. The tests were made in a 5-foot, closed-throat atmospheric wind tunnel. The object of the tests was primarily to determine the effects of various angles of yaw on the rolling moments of t…
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Date:
August 19, 1930
Creator:
Knight, Montgomery & Wenzinger, Carl J.
Some approximate equations for the standard atmosphere
Description:
This report contains the derivation of a series of simple approximate equations for density ratios and for the pressure ratio in the standard atmosphere. The accuracy of the various equations is discussed and the limits of applications are given. Several of these equations are in excellent agreement with the standard values.
Date:
September 19, 1930
Creator:
Diehl, Walter S.
The effect of nozzle design and operating conditions on the atomization and distribution of fuel sprays
Description:
The atomization and distribution characteristics of fuel sprays from automatic injection valves for compression-ignition engines were determined by catching the fuel drops on smoked-glass plates, and then measuring and counting the impressions made in the lampblack. The experiments were made in an air-tight chamber in which the air density was raised to values corresponding to engine conditions.
Date:
February 19, 1932
Creator:
Lee, Dana W.
Maneuverability investigation of an O3U-1 observation airplane
Description:
From Summary: "This report presents the results of maneuverability tests of an O3U-1 observation airplane. This investigation is the third in a series of similar investigations requested by the Bureau of Aeronautics (Navy) for the purpose of comparing the maneuverability of different airplane types and to provide quantitative data for use in establishing a criterion or method for rating the maneuverability of an airplane. The two former investigations were conducted with the fighter types desig…
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Date:
January 19, 1933
Creator:
Thompson, F. L. & Kirschbaum, H. W.
A Flight Investigation of the Lateral Control Characteristics of Short Wide Ailerons and Various Spoilers With Different Amounts of Wing Dihedral
Description:
This report presents the results of flight tests made to determine the lateral control characteristics of short wide ailerons and spoilers, as a consequence of the promise shown in wind-tunnel tests by these devices as means of obtaining lateral control, particularly at angles of attack above the stall. Several forms of spoilers, front-hinge, rear-hinge, plain retractable, and saw-tooth retractable were tested alone and in combination with the ailerons. The tests were made with several differen…
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Date:
May 19, 1934
Creator:
Weick, Fred E.; Soulé, Hartley A. & Gough, Melvin N.
Tank tests of NACA model 40 series of hulls for small flying boats and amphibians
Description:
From Summary: "The NACA model 40 series of flying-boat hull models consists of 2 forebodies and 3 afterbodies combined to provide several forms suitable for use in small marine aircraft. One forebody is the usual form with hollow bow sections and the other has a bottom surface that is completely developable from bow to step. The afterbodies include a short pointed afterbody with an extension for the tail surfaces, a long afterbody similar to that of a seaplane float but long enough to carry the…
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Date:
June 19, 1935
Creator:
Parkinson, John B. & Dawson, John R.
A simplified application of the method of operators to the calculation of disturbed motions of an airplane
Description:
"A simplified treatment of the application of Heaviside's operational methods to problems of airplane dynamics is given. Certain graphical methods and logarithmic formulas that lessen the amount of computation involved are explained. The problem representing a gust disturbance or control manipulation is taken up and it is pointed out that in certain cases arbitrary control manipulations may be dealt with as though they imposed specific constraints on the airplane, thus avoiding the necessity of…
more
Date:
February 19, 1936
Creator:
Jones, Robert T.
Effect of nozzle design on fuel spray and flame formation in a high-speed compression-ignition engine
Description:
"Fuel was injected from different type of injection nozzles into the combustion chamber of the NACA combustion apparatus, operated as a compression-ignition engine. High speed motion pictures were taken of the fuel sprays and combustion. Single-orifice nozzles of 0.008, 0.020, and 0.040 inch diameter, and multiorifice nozzles having 2, 6, and 16 orifices were tested. Nozzles having impinging jets and slit orifices were also included" (p. 327).
Date:
March 19, 1936
Creator:
Rothrock, A. M. & Waldron, C. D.
The Rolling Friction of Several Airplane Wheels and Tires and the Effect of Rolling Friction on Take-Off
Description:
This report presents the results of tests made to determine the rolling friction of airplane wheels and tires under various conditions of wheel loading, tire inflation pressure, and ground surface. The effect of wheel-bearing type was also investigated. Six pairs of wheels and tires were tested including two sizes of each of the types designated as standard (high pressure), low pressure, and extra low pressure. The results of calculations intended to show the effect of variations in rolling fri…
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Date:
September 19, 1936
Creator:
Wetmore, J. W.
Compressible Flow About Symmetrical Joukowski Profiles
Description:
"The method of Poggi is employed for the determination of the effects of compressibility upon the flow past an obstacle. A general expression for the velocity increment due to compressibility is obtained. The general result holds whatever the shape of the obstacle; but, in order to obtain the complete solution, it is necessary to know a certain Fourier expansion of the square of the velocity of flow past the obstacle. An application is made to the case flow of a symmetrical Joukowski profile wi…
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Date:
November 19, 1937
Creator:
Kaplan, Carl
Theoretical stability and control characteristics of wings with various amounts of taper and twist
Description:
From Summary: "Stability derivatives have been computed for twisted wings of different plan forms that include variations in both the wing taper and the aspect ratio. Taper ratios of 1.0, 0,50, and 0.25 are considered for each of three aspect ratios: 6, 10, and 16. The specific derivatives for which results are given are the rolling-moment and the yawing-moment derivatives with respect to (a) rolling velocity, (b) yawing velocity, and (c) angle of sideslip. These results are given in such a for…
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Date:
April 19, 1938
Creator:
Pearson, Henry A. & Jones, Robert T.
Effective Gust Structure at Low Altitudes as Determined From the Reactions of an Airplane
Description:
"Measurements of gust structure and gust intensity were made in the lower levels of the atmosphere (0 to 3,500 ft.). An Aeronca C-2 airplane was used as the measuring instrument, the gust structure being derived from the recorded motions of the airplane. Data were also obtained on wind velocities and temperatures as functions of altitude for use in attempting to correlate the gust-structure data with various meteorological quantities" (p. 263).
Date:
October 19, 1939
Creator:
Donely, Philip
Propeller analysis from experimental data
Description:
The operation of the propeller is analyzed by the use of the distribution of forces along the radius, combined with theoretical equations. The data were obtained in the NACA 20-foot wind tunnel on a 4-foot-diameter, two-blade propeller, operating in front of four body shapes, ranging from a small shaft to support the propeller to conventional NACA cowling. A method of estimating the axial and the rotational energy in the wake as a fractional part of the propeller power is given. A knowledge of …
more
Date:
July 19, 1940
Creator:
Stickle, George W. & Crigler, John L.
Flight Measurements of the Effects of a Wing Leading-Edge Slot and Other Modifications on the Stability, Maximum Lift, and High Speed of an Observation Airplane
Description:
Report presenting stability, maximum lift, and high-speed tests of an observation airplane fitted with Maxwell leading-edge slots. The static and dynamic longitudinal and lateral stability was generally satisfactory and not affected much by the slots.
Date:
January 19, 1943
Creator:
Turner, William N. & Adams, Betty
Critical amounts of uranium compounds
Description:
No Description Available.
Date:
March 19, 1943
Creator:
Konopinski, E.; Metropolis, N.; Teller, E. & Woods, L.
[Technical progress report for Hanford 100 and 300 areas]. Progress report ending May 15, 1943
Description:
This weekly report details technical activities for the week ending May 15, 1943.
Date:
May 19, 1943
Time Variation of Percent Distribution of Fission Activity in Bombarded Uranyl Nitrate
Description:
"In this report are presented three figures which show how the relative activities (expressed as percentages of total activity) of the individual fission elements (produced by neutron bombardment of uranyl nitrate) vary with cooling time."
Date:
May 19, 1943
Creator:
Brady, E. L. & Coryell, Charles D.
Memorandum on Uranium Ore Processing
Description:
The following memorandum discusses experiments and methods to recover uranium from Colorado-Utah sandstone and leaving the vanadium in the tails, improving filterability.
Date:
November 19, 1943
Creator:
Brimm, E. O. & Gailey, A. J.
On the plane potential flow past a lattice of arbitrary airfoils
Description:
The two-dimensional, incompressible potential flow past a lattice of airfoils of arbitrary shape is investigated theoretically. The problem is treated by usual methods of conformal mapping in several stages, one stage corresponding to the mapping of the framework of the arbitrary line lattice and another significant stage corresponding to the Theodorsen method for the mapping of the arbitrary single wing profile into a circle. A particular feature in the theoretical treatment is the special han…
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Date:
November 19, 1943
Creator:
Garrick, I. E.
A Theoretical Investigation of the Rolling Oscillations of an Airplane With Ailerons Free
Description:
"An analysis is made of the stability of an airplane with ailerons free, with particular attention to the motions when the ailerons have a tendency to float against the wind. The present analysis supersedes the aileron investigation contained in NACA Technical Report no. 709. The equations of motion are first written to include yawing and sideslipping, and it is demonstrated that the principal effects of freeing the ailerons can be determined without regard to these motions" (p. 255).
Date:
November 19, 1943
Creator:
Cohen, Doris
The Effects of a Highly Cambered Low-Drag Wing and of Auxiliary Flaps on the High-Speed Aerodynamic Characteristics of a Twin-Engine Pursuit Airplane Model
Description:
Results are presented for tests of two wings, an NACA 230-series wing and a highly-cambered NACA 66-series wing on a twin-engine pursuit airplane. Auxiliary control flaps were tested in combinations with each wing. Data showing comparison of high-speed aerodynamic characteristics of the model when equipped with each wing, the effect of the auxiliary control flaps on aerodynamic characteristics, and elevator effectiveness for the model with the 66-series wing are presented. High-speed aerodynami…
more
Date:
February 19, 1944
Creator:
Ganzer, Victor M.
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