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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
N.A.C.A. Langley field wind tunnel apparatusthe tilting manometer
A description is given of a tilting manometer designed to meet the requirements of a manometer for use in the wind tunnel at the Langley Memorial Aeronautical Laboratory. This gauge was designed to meet the requirements of a manometer in use in connection with a static pressure plate to indicate the wind speed in the tunnel. The requirements are noted. The sensitivity of the gauge must be made inversely proportional to the pressure to be measured. The gauge must be accurately and quickly set for any desired pressure. When set at the desired pressure, the extent of variation between the existing and the desired pressures may be readily estimated. In fact, this manometer is quick to adjust, is easy to read, always has the meniscus in the same position, and accurately indicates a large range of air speeds on what is a comparatively compact instrument. digital.library.unt.edu/ark:/67531/metadc53735/
N.A.C.A. recording air speed meter
A new type of air speed meter is described which was designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists essentially of a tight metal diaphragm of high natural period which is acted upon by the pressure difference of a pitot-static head. The resulting deflection of this diaphragm is recorded optically on a moving film. digital.library.unt.edu/ark:/67531/metadc53744/
N.A.C.A. Stall-Warning Device
With some airplanes the approach to the stall is accompanied by changes in the behavior, such as tail buffeting or changes in the control characteristics of the airplane so that the pilot obtains a warning of the impending stall. Vith other airplanes it is possible to approach the stall without any perceptible warning other than the reading of the air-speed meter, in which case the danger of inadvertent stalling is considerably greater. Although it is not within the scope of this paper to discuss stalling characteristics, it is desired to point out that in general the danger of inadvertent stalling is greatest with those airplanes that behave worse when the stalling occurs; that is, with airplanes in which the stall starts at the wing tips. A warning of the impending stall is desirable in any case, but is particularly desirable with airplanes of the latter type. digital.library.unt.edu/ark:/67531/metadc65017/
The A.N.E.C. IV "Missel Thrush" light airplane
A product of the Air Navigation Engineering Co., the Missel Thrush is a light airplane suitable for private ownership. It is a two seat tractor fuselage biplane with single I interplane struts designed by J. Bewsher. digital.library.unt.edu/ark:/67531/metadc279637/
The Aachen wind-tunnel balance
A description of the balance in the Aachen wind-tunnel. digital.library.unt.edu/ark:/67531/metadc63470/
Abacus for the reduction of English measures to the metric system and vice versa
This report presents a description of the abacus as well as construction details. There is also a detailed description on how to use the abacus. digital.library.unt.edu/ark:/67531/metadc53628/
Abacus giving the variation of the mean pressure of an aviation engine as a function of its speed of rotation
Comparing the results of the calculations for computing the mean pressure of an aviation engine for any number of revolutions, with those of experiment, the writer, by numerous examples, shows the perfect agreement between them. This report will show that, by means of a special abacus, an engineer can instantly plot the characteristics of an engine. digital.library.unt.edu/ark:/67531/metadc53605/
Ability of pilots to control simulated short-period yawing oscillations
No Description digital.library.unt.edu/ark:/67531/metadc58499/
Abnormal grain growth in M-252 and S-816 alloys
An experimental investigation was carried out on air- and vacuum-melted M-252 and S-816 alloys to find conditions of heating and hot-working which resulted in abnormal grain growth. The experiments were mainly limited to normal conditions of heating for hot-working and heat treatment and normal temperatures of solution treatment were used to allow grain growth after susceptibility to abnormal grain growth was developed by various experimental conditions. Results indicated that small reductions of essentially strain-free metal were the basic cause of such grain growth. digital.library.unt.edu/ark:/67531/metadc57131/
Abnormal grain growth in nickel-base heat-resistant alloys
No Description digital.library.unt.edu/ark:/67531/metadc57096/
Abnormal grain growth in S-816 alloy
No Description digital.library.unt.edu/ark:/67531/metadc57000/
Abscissas and Weights for Guassian Quadrature For N=2 to 100, and N-125, 150, 175, 200
The abscissas and weights for Gaussian Quadrature of order N = 2 to 100,and N = 125, 150, 175, and 200 are given. The abscissas are given to twenty-four places and the error is estimated to be no more than 1 unit in the last place. The weights are given to twenty-three places and the error is estimated to be no more than 1 unit in the last place. digital.library.unt.edu/ark:/67531/metadc70465/
Absolute coefficients and the graphical representation of airfoil characteristics
It is argued that there should be an agreement as to what conventions to use in determining absolute coefficients used in aeronautics and in how to plot those coefficients. Of particular importance are the absolute coefficients of lift and drag. The author argues for the use of the German method over the kind in common use in the United States and England, and for the Continental over the usual American and British method of graphically representing the characteristics of an airfoil. The author notes that, on the whole, it appears that the use of natural absolute coefficients in a polar diagram is the logical method for presentation of airfoil characteristics, and that serious consideration should be given to the advisability of adopting this method in all countries, in order to advance uniformity and accuracy in the science of aeronautics. digital.library.unt.edu/ark:/67531/metadc53725/
Absolute dimensions of Karman vortex motion
No Description digital.library.unt.edu/ark:/67531/metadc53809/
Absorbing landing shocks
Tires, steel springs, hydraulic shock absorbers, and axle travel are all examined in relation to absorbing landing shocks. digital.library.unt.edu/ark:/67531/metadc56246/
Absorption-Multistage Flash Distillation Process
No Description digital.library.unt.edu/ark:/67531/metadc11638/
Abstracts of Current Decisions on Mines and Mining: October, 1912 to March, 1913
Bulletin issued by the U.S. Bureau of Mines. From the Preface: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (p. 9). digital.library.unt.edu/ark:/67531/metadc12274/
Abstracts of Current Decisions on Mines and Mining: March to December, 1913
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12291/
Abstracts of Current Decisions on Mines and Mining: December, 1913, to September, 1914
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12299/
Abstracts of Current Decisions on Mines and Mining: October, 1914, to April, 1915
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9), digital.library.unt.edu/ark:/67531/metadc12309/
Abstracts of Current Decisions on Mines and Mining: May to September, 1915
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12319/
Abstracts of Current Decisions on Mines and Mining: October to December, 1915
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12324/
Abstracts of Current Decisions on Mines and Mining: January to April, 1916
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12332/
Abstracts of Current Decisions on Mines and Mining: May to August, 1916
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12347/
Abstracts of Current Decisions on Mines and Mining: September to December, 1916
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12350/
Abstracts of Current Decisions on Mines and Mining: January to April, 1917
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12355/
Abstracts of Current Decisions on Mines and Mining: May to August, 1917
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc70474/
Abstracts of Current Decisions on Mines and Mining: May to August, 1917
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc38813/
Abstracts of Current Decisions on Mines and Mining: September to December, 1917
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12362/
Abstracts of Current Decisions on Mines and Mining: May to September, 1918
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12368/
Abstracts of Current Decisions on Mines and Mining: September to December, 1918
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12373/
Abstracts of Current Decisions on Mines and Mining: January to May 1919
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc38750/
Abstracts of Current Decisions on Mines and Mining: May to August, 1919
Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9). digital.library.unt.edu/ark:/67531/metadc12376/
Abstracts of Current Decisions on Mines and Mining: May to August, 1917
Report issued by the Bureau of Mines over mining decisions made between May and August of 1917. Details of the decisions are presented and discussed. digital.library.unt.edu/ark:/67531/metadc38745/
Abstracts of Current Decisions on Mines and Mining Reported from January to May 1918
Report issued by the Bureau of Mines over mining decisions made between January and May of 1918. Details of the decisions are presented and discussed. digital.library.unt.edu/ark:/67531/metadc38748/
Abstracts pertaining to seaplanes
About 400 references pertaining to the hydrodynamic design of seaplanes have been compiled, and the information is presented in the form of abstracts classified under six main headings. digital.library.unt.edu/ark:/67531/metadc62825/
Accelerated Laboratory Test for Determination of Slacking Characteristics of Coal
Report issued by the U.S. Bureau of Mines on laboratory testing developed to measure the slacking of coals. Testing methods and results are presented. This report includes tables and graphs. digital.library.unt.edu/ark:/67531/metadc38382/
Acceleration characteristics of a turbojet engine with variable-position inlet guide vanes
No Description digital.library.unt.edu/ark:/67531/metadc60813/
Acceleration Characteristics of R-3350 Engine Equipped with NACA Injection Impeller
Qualitative investigations have shown that use of the NACA injection impeller with the R-3350 engine increases the inertia of the fuel-injection system and, when the standard fuel-metering system is used, this increase in inertia results in poor engine acceleration characteristics. This investigation was therefore undertaken to determine whether satisfactory acceleration characteristics of the engine equipped with the injection impeller could be obtained by simple modifications to the fuel-monitoring system. The engine was operated with two types of carburetor; namely, a hydraulic-metering carburetor incorporating a vacuum-operated accelerating pump and a direct-metering carburetor having a throttle-actuated accelerating pump. The vacuum-operated accelerating pump of the hydraulic-metering carburetor was modified to produce satisfactory accelerations by supplementing the standard air chamber with an additional 75-cubic spring. The throttle-actuated accelerating pump of the direct-metering carburetor was modified to produce satisfactory accelerations by replacing the standard 0.028-inch-diameter bleed in the load-compensator balance line with a smaller bleed of 0.0225-inch diameter. The results of this investigation indicated that both carburetors can be easily modified to produce satisfactory acceleration characteristics of the engine and no definite choice between the types of carburetor and accelerating pump can be made. Use of the direct-metering carburetor, however, probably resulted in better fuel distribution to the cylinders during the acceleration period and reduced the backfire hazard because all the fuel is introduced through the injection impeller. digital.library.unt.edu/ark:/67531/metadc63808/
Acceleration Due to Gravity at the National Bureau of Standards
No Description digital.library.unt.edu/ark:/67531/metadc13155/
Acceleration Measurements During Landing in Rough Water of a 1/7-Scale Dynamic Model of Grumman XJR2F-1 Amphibian - Langley Tank Model 212, TED No. NACA 2378
Tests of a 1/7 size model of the Grumman XJR2F-1 amphibian were made in Langley tank no.1 to examine the landing behavior in rough water and to measure the normal and angular accelerations experienced by the model during these landings. All landings were made normal to the direction of wave advance, a condition assumed to produce the greatest accelerations. Wave heights of 4.4 and 8.0 inches (2.5 and 4.7 ft, full size) were used in the tests and the wave lengths were varied between 10 and 50 feet (70 and 350 ft, full size). Maximum normal accelerations of about 6.5g were obtained in 4.4 inch waves and 8.5g were obtained in 8.0 inch waves. A maximum angular acceleration corresponding to 16 radians per second per second, full size, was obtained in the higher waves. The data indicate that the airplane will experience its greatest accelerations when landing in waves of about 20 feet (140 ft, full size) in length. digital.library.unt.edu/ark:/67531/metadc64281/
Acceleration Measurements During Landings of a 1/5.5-Size Dynamic Model of the Columbia XJL-1 Amphibian in Smooth Water and in Waves: Langley Tank Model 208M, TED No. NACA 2336
A 1/5.5-size powered dynamic model of the Columbia XJL-1 amphibian was landed in Langley tank no. 1 in smooth water and in oncoming waves of heights from 2.1 feet to 6.4 feet (full-size) and lengths from 50 feet to 264 feet (full-size). The motions and the vertical accelerations of the model were continuously recorded. The greatest vertical acceleration measured during the smooth-water landings was 3.1g. During landings in rough water the greatest vertical acceleration measured was 15.4g, for a landing in 6.4-foot by 165-foot waves. The impact accelerations increased with increase in wave height and, in general, decreased with increase in wave length. During the landings in waves the model bounced into the air at stalled attitudes at speeds below flying speed. The model trimmed up to the mechanical trim stop (20 deg) during landings in waves of heights greater than 2.0 feet. Solid water came over the bow and damaged the propeller during one landing in 6.4-foot waves. The vertical acceleration coefficients at first impact from the tank tests of a 1/5.5-size model were in fair agreement with data obtained at the Langley impact basin during tests of a 1/2-size model of the hull. digital.library.unt.edu/ark:/67531/metadc64233/
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics : effect of compressor interstage air bleed
No Description digital.library.unt.edu/ark:/67531/metadc59611/
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics I : effect of air bleed at compressor outlet
An analytical investigation was made to determine from component performance characteristics the effect of air bleed at the compressor outlet on the acceleration characteristics of a typical high-pressure-ratio single-spool turbojet engine. Consideration of several operating lines on the compressor performance map with two turbine-inlet temperatures showed that for a minimum acceleration time the turbine-inlet temperature should be the maximum allowable, and the operating line on the compressor map should be as close to the surge region as possible throughout the speed range. Operation along such a line would require a continuously varying bleed area. A relatively simple two-step area bleed gives only a small increase in acceleration time over a corresponding variable-area bleed. For the modes of operation considered, over 84 percent of the total acceleration time was required to accelerate through the low-speed range ; therefore, better low-speed compressor performance (higher pressure ratios and efficiencies) would give a significant reduction in acceleration time. digital.library.unt.edu/ark:/67531/metadc59518/
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics III : effect of turbine stator adjustment
No Description digital.library.unt.edu/ark:/67531/metadc60396/
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control
No Description digital.library.unt.edu/ark:/67531/metadc63981/
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control
Accelerating-limiting controls for turbojet engines. digital.library.unt.edu/ark:/67531/metadc52973/
Acceleration, stress, and deflection measurements on the XB-15 bomber in gusty air
No Description digital.library.unt.edu/ark:/67531/metadc61098/
Accelerations and bottom pressures measured on a B-24D airplane in a ditching test
No Description digital.library.unt.edu/ark:/67531/metadc61135/
Accelerations and passenger harness loads measured in full-scale light-airplane crashes
No Description digital.library.unt.edu/ark:/67531/metadc56800/