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 Collection: National Advisory Committee for Aeronautics Collection
The 5- by 7-meter wind tunnel of the DVL

The 5- by 7-meter wind tunnel of the DVL

Date: October 3, 1936
Creator: Kramer, M
Description: The report contains a description of the DVL wind tunnel. According to the cones fixed, an elliptical stream with axes 5 by 7 meters and length 9 meters, or a stream 6 by 8 meters in cross section and 11 meters in length is available. The top speed with the smaller cone is 65 meters per second. The testing equipment consists of an automatic six-component balance and a test rig for propellers and engines up to 650 horsepower.
Contributing Partner: UNT Libraries Government Documents Department
The 6-foot-4-inch wind tunnel at the Washington Navy Yard

The 6-foot-4-inch wind tunnel at the Washington Navy Yard

Date: August 1935
Creator: Desmond, G L & Mccrary, J A
Description: The 6-foot-4-inch wind tunnel and its auxiliary equipment has proven itself capable of continuous and reliable output of data. The real value of the tunnel will increase as experience is gained in checking the observed tunnel performance against full-scale performance. Such has been the case of the 8- by 8-foot tunnel, and for that reason the comparison in the calibration tests have been presented.
Contributing Partner: UNT Libraries Government Documents Department
The 7 by 10 foot wind tunnel of the National Advisory Committee for Aeronautics

The 7 by 10 foot wind tunnel of the National Advisory Committee for Aeronautics

Date: 1933
Creator: Harris, Thomas A
Description: This report presents a description of the 7 by 10 foot wind tunnel and associated apparatus of the National Advisory Committee for Aeronautics. Included also are calibration test results and characteristic test data of both static force tests and autorotation tests made in the tunnel.
Contributing Partner: UNT Libraries Government Documents Department
An 8-foot axisymmetrical fixed nozzle for subsonic Mach numbers up to 0.99 and for a supersonic Mach number of 1.2

An 8-foot axisymmetrical fixed nozzle for subsonic Mach numbers up to 0.99 and for a supersonic Mach number of 1.2

Date: February 23, 1950
Creator: Ritchie, Virgil S; Wright, Ray H & Tulin, Marshall P
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The 300 H.P. Benz Aircraft Engine

The 300 H.P. Benz Aircraft Engine

Date: January 1921
Creator: Heller, A.
Description: This report provides a description of the Benz 300 H.P. aircraft engine containing 12 cylinders placed at a 60° angle. It includes a detailed description of the development of the constructional points, particularly the cylinders, pistons, and connecting rods, as well as the engine fitting, lubrication, oil pumps, bearings, oil tank, fuel pump, carburetors, and cooling system. There are seven pages of illustrative figures at the end of the report.
Contributing Partner: UNT Libraries Government Documents Department
The 1000 HP traffic airplane of the Zeppelin Works in Staaken

The 1000 HP traffic airplane of the Zeppelin Works in Staaken

Date: September 1921
Creator: Rohrbach, A K
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The 1350 F stress-rupture properties of two wrought alloys and three cast alloys

The 1350 F stress-rupture properties of two wrought alloys and three cast alloys

Date: November 1947
Creator: Reynolds, E E; Freeman, J W & White, A E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The 1926 German seaplane contest

The 1926 German seaplane contest

Date: March 1928
Creator: Seewald, F; Blenk, H & Liebers, F
Description: The report discusses the problem of rating the various seaplane designs from the 1926 seaplane contest. The whole process of rating consists in measuring the climbing speed, flying weight and carrying capacity of a seaplane and then using these data as the basis of a construction problem.
Contributing Partner: UNT Libraries Government Documents Department
The 1929 Rhon soaring-flight contest

The 1929 Rhon soaring-flight contest

Date: April 1930
Creator: Lippisch, Alexander
Description: The limitation of the 1929 contest to performance gliders necessitated the establishment of a formula which would make it possible to distinguish between performance gliders and school and training gliders. The sinking speed was therefore adopted as the basis for such a distinction, and the requirement was made that the sinking speed of a performance glider should not exceed 0.8 m/s. The rest of the report details the different entries with regard to design and performance.
Contributing Partner: UNT Libraries Government Documents Department
The 1933 contest for the Deutsch de la Meurthe trophy

The 1933 contest for the Deutsch de la Meurthe trophy

Date: October 1933
Creator: Leglise, Pierre; Hirschauer, L & Saladin, Raymond
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The 1934 contest for the Deutsch de la Meurthe trophy

The 1934 contest for the Deutsch de la Meurthe trophy

Date: February 1935
Creator: Leglise, Pierre
Description: This report presents a description of the rules, history and new technical innovations in the Deutsch de la Meurthe Cup race of 1934.
Contributing Partner: UNT Libraries Government Documents Department
The A.B.C. "Robin" (British) : a single-seat cabin monoplane

The A.B.C. "Robin" (British) : a single-seat cabin monoplane

Date: September 1929
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The A. B. Flygindustri "K 37" (Swedish Junkers) : A Low-Wing All-Metal Military Airplane

The A. B. Flygindustri "K 37" (Swedish Junkers) : A Low-Wing All-Metal Military Airplane

Date: October 1929
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
N.A.C.A. control position recorder

N.A.C.A. control position recorder

Date: May 1922
Creator: Norton, F H
Description: A new instrument is described which is capable of simultaneously recording the position of the three controls of an airplane. The records are taken photographically on a standard N.A.C.A. film drum and the instrument can be quickly installed in any airplane.
Contributing Partner: UNT Libraries Government Documents Department
N.A.C.A. Langley field wind tunnel apparatusthe tilting manometer

N.A.C.A. Langley field wind tunnel apparatusthe tilting manometer

Date: January 1921
Creator: Norton, F H & Bacon, D L
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
N.A.C.A. recording  air speed meter

N.A.C.A. recording air speed meter

Date: October 1921
Creator: Norton, F H
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
N.A.C.A. Stall-Warning Device

N.A.C.A. Stall-Warning Device

Date: February 1938
Creator: Thompson, F. L.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
The A.N.E.C. IV "Missel Thrush" light airplane

The A.N.E.C. IV "Missel Thrush" light airplane

Date: November 1926
Creator: unknown
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
The Aachen wind-tunnel balance

The Aachen wind-tunnel balance

Date: November 1934
Creator: Wieselsberger, C
Description: A description of the balance in the Aachen wind-tunnel.
Contributing Partner: UNT Libraries Government Documents Department
Abacus for the reduction of English measures to the metric system and vice versa

Abacus for the reduction of English measures to the metric system and vice versa

Date: July 1921
Creator: Tenani, Mario
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Abacus giving the variation of the mean pressure of an aviation engine as a function of its speed of rotation

Abacus giving the variation of the mean pressure of an aviation engine as a function of its speed of rotation

Date: March 1921
Creator: Margoulis, W
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Ability of pilots to control simulated short-period yawing oscillations

Ability of pilots to control simulated short-period yawing oscillations

Date: November 13, 1950
Creator: Phillips, William H & Cheatham, Donald C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Abnormal grain growth in M-252 and S-816 alloys

Abnormal grain growth in M-252 and S-816 alloys

Date: November 1957
Creator: Decker, R F; Rush, A I; Dano, A G & Freeman, J W
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Abnormal grain growth in nickel-base heat-resistant alloys

Abnormal grain growth in nickel-base heat-resistant alloys

Date: December 1957
Creator: Decker, R F; Rush, A I; Dano, A G & Freeman, A G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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