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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1941
75-mm howitzer materiel.

75-mm howitzer materiel.

Date: June 21, 1941
Creator: United States. Army. Ordnance Department.
Description: This is a World War II-era technical manual for the 75mm Howitzer. It contains information on use, maintenance, assembly, and other aspects of this weapon.
Contributing Partner: UNT Libraries Government Documents Department
The additional-mass effect of plates as determined by experiments

The additional-mass effect of plates as determined by experiments

Date: 1941
Creator: Gracey, William
Description: The apparent increase in the inertia properties of a body moving in a fluid medium has been called the additional-mass effect. This report presents a resume of test procedures and results of experimental determinations of the additional-mass effect of flat plates. In addition to data obtained from various foreign sources and from a NACA investigation in 1933, the results of tests recently conducted by the National Advisory Committee for Aeronautics are included.
Contributing Partner: UNT Libraries Government Documents Department
Additional power-on wind-tunnel tests of the 1/8-scale model of the Brewster F2A airplane with full-span slotted flaps

Additional power-on wind-tunnel tests of the 1/8-scale model of the Brewster F2A airplane with full-span slotted flaps

Date: October 1941
Creator: Lowry, John G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerial photography.

Aerial photography.

Date: July 8, 1941
Creator: United States. War Department.
Description: A training manual designed to teach aerial photography for military purposes.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of a slot-lip aileron and slotted flap for dive brakes

Aerodynamic characteristics of a slot-lip aileron and slotted flap for dive brakes

Date: April 1941
Creator: Rogallo, F M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic factors affecting the ability of a pilot to return an airplane to level from a banked attitude by use of the rudder alone and without change of heading

Aerodynamic factors affecting the ability of a pilot to return an airplane to level from a banked attitude by use of the rudder alone and without change of heading

Date: October 1941
Creator: Harmon, S M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The aerodynamics of a wind-tunnel fan

The aerodynamics of a wind-tunnel fan

Date: August 1941
Creator: Corson, Blake W
Description: The vortex blade-element theory modified to apply to an axial fan working in a duct is reviewed. Thrust and power coefficients for a fan are identified with the corresponding coefficients for airplane propellers. The relation of pressure produced by the fan to the blade-element coefficients is developed. The distribution of axial velocity of fluid through a fan is assumed to be controlled by the fan itself. The radial distribution of tangential velocity imported by the fan to fluid moving through the fan is shown to be independent of the axial-velocity distribution. A nondimensional coefficient, designated the rotation constant, is introduced. This constant is based solely upon design information. The use of the rotation constant in simplifying the design of a fan for a specific operating condition is demonstrated. Based on the use of the rotation constant, a graphical method is outlined by which the performance of a given fan in a given wind tunnel may be predicted and by which the distributions of axial velocity of the fluid through the fan under various operating conditions may be established.
Contributing Partner: UNT Libraries Government Documents Department
Air transport by gliders : some technical observations

Air transport by gliders : some technical observations

Date: June 1, 1941
Creator: Stepniewski, Wieslaw
Description: This short analysis may be useful in determining the real tactical possibilities of "glider trains" and in adopting the course to be followed in possible studies of these questions. In this analysis most prominent are: (a) the power required for the train in level flight; (b) its speed; (c) climb; and (d) the type of airplane best suited for towing as well as design requirements for transport gliders.
Contributing Partner: UNT Libraries Government Documents Department
Airplane structures.

Airplane structures.

Date: October 29, 1941
Creator: United States. War Department.
Description: Describes structural details of service airplanes used by the Army Air Corps, sufficient for personnel to perform inspection and maintenance of their equipment.
Contributing Partner: UNT Libraries Government Documents Department
Airship aerodynamics.

Airship aerodynamics.

Date: February 11, 1941
Creator: United States. War Department.
Description: "This manual is designed as a text for the instruction of airship student pilots .... to give the knowledge of aerodynamics essential to the operation of [lighter than air aircraft]."(Page 2.)
Contributing Partner: UNT Libraries Government Documents Department
Aluminum-zinc-magnesium-copper casting alloys

Aluminum-zinc-magnesium-copper casting alloys

Date: July 1941
Creator: Kempf, L. W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
America calling : take your place in civilian defense.

America calling : take your place in civilian defense.

Date: 1941
Creator: Matter, Herbert, 1907-1984.
Description: Red and white text, with a civil defense insignia in the middle of the poster. Civil Defense insignia is a red "CD" in white triangle on a blue circle.
Contributing Partner: UNT Libraries Government Documents Department
Analyses of Washington Coals: Supplement to Technical Paper 491

Analyses of Washington Coals: Supplement to Technical Paper 491

Date: 1941
Creator: Yancey, H. F. & Geer, M. R.
Description: Report issued by the Bureau of Mines discussing the technological advances made in the mining industry between 1931 and 1941. Mechanized methods for mining operations are presented. This report includes tables, illustrations, and a map.
Contributing Partner: UNT Libraries Government Documents Department
Analysis and prediction of longitudinal stability of airplanes

Analysis and prediction of longitudinal stability of airplanes

Date: January 1, 1941
Creator: Gilruth, R R & White, M D
Description: An analysis has been made of the longitudinal stability characteristics of 15 airplanes as determined in flight. In the correlation of satisfactory and unsatisfactory characteristics with determined values, the derivative that expresses the ratio of static-restoring moments to elevator-control moments was found to represent most nearly the stability characteristics appreciated by the pilots. The analysis was extended to study the effects of various design features on the observed stability characteristics. Design charts and data are included that show the effects on longitudinal stability of relative positions of wing and tail, fuselage size and location, engine nacelles, and horizontal-tail arrangements.
Contributing Partner: UNT Libraries Government Documents Department
Analysis of ground effect on the lifting airscrew

Analysis of ground effect on the lifting airscrew

Date: December 1941
Creator: Knight, Montgomery & Hegner, Ralph A
Description: A study is presented of ground effect as applied to the lifting airscrew of the type used in modern gyroplane and helicopters. The mathematical analysis of the problem has been verified by tests made of three rotor models in the presence of a large circular "ground plane." A method of approximating the decelerating effect during vertical approach to the ground has been devised. The results of the study are presented in the form of convenient charts.
Contributing Partner: UNT Libraries Government Documents Department
Analytical determination of control system pulley-axis angles

Analytical determination of control system pulley-axis angles

Date: September 1941
Creator: Driggs, H I
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An analytical study of wing and tail loads associated with an elevator deflection

An analytical study of wing and tail loads associated with an elevator deflection

Date: June 1, 1941
Creator: Garvin, J B
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Angora goat.

The Angora goat.

Date: 1941
Creator: Williams, G. P. & Spencer, D. A. (Damon Alvin), 1887-
Description: Describes the characteristics, benefits, and uses of the Angora goat. Discusses methods of managing goats on the range.
Contributing Partner: UNT Libraries Government Documents Department
Annual Report of Research and Technologic Work on Coal: Fiscal Year 1941

Annual Report of Research and Technologic Work on Coal: Fiscal Year 1941

Date: November 1941
Creator: Fieldner, Arno Carl & Schmidt, L. D.
Description: Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1941. As stated in the foreword, "these investigations increase our fund of exact knowledge on the properties and composition of American coals and lead to better methods in mining, preparing, storing, and utilizing coal" (p. 4). This report includes tables, illustrations, photographs, and a map.
Contributing Partner: UNT Libraries Government Documents Department
Annual Report of the Mining Division, Fiscal Year 1941

Annual Report of the Mining Division, Fiscal Year 1941

Date: November 1941
Creator: Jackson, Chas. F.
Description: Report issued by the U.S. Bureau of Mines on the annual study of the work done by the Mining Division. Investigations, operations, and projects completed during the fiscal year are discussed. This report includes tables, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (26th).administrative report including Technical Report nos. 681 to 703

Annual report of the National Advisory Committee for Aeronautics (26th).administrative report including Technical Report nos. 681 to 703

Date: 1941
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Contributing Partner: UNT Libraries Government Documents Department
An apparatus for measuring rates of discharge of a fuel-injection system

An apparatus for measuring rates of discharge of a fuel-injection system

Date: March 24, 1941
Creator: Dutee, Francis J
Description: A portable apparatus for rapidly determining rates of discharge of a fuel-injection system is described. Satisfactory operation of this apparatus with injection-pump speeds up to 2400 r.p.m was obtained. Rate-of-discharge tests were made with several cam-plunger-valve injection systems with long injection tubes. A check valve designed to reduce secondary discharges was tested. This check valve was operated with injection-pump speeds up to 2400 r.p.m without the occurrence of large secondary discharges.
Contributing Partner: UNT Libraries Government Documents Department
"Arise Americans" : your country and your liberty are in grave danger -- protect them now by joining the-- United States Navy or the U.S. Naval Reserve.

"Arise Americans" : your country and your liberty are in grave danger -- protect them now by joining the-- United States Navy or the U.S. Naval Reserve.

Date: June 18, 1941
Creator: Barclay, McClelland.
Description: A sailor in a white uniform uses a wrench on a large weapon or equipment. A blue border with white stars surrounds the top and sides of the picture. The bottom half of the poster is red, with white and blue text.
Contributing Partner: UNT Libraries Government Documents Department
Attwater's Prairie Chicken, its Life History and Management

Attwater's Prairie Chicken, its Life History and Management

Date: 1941
Creator: Lehmann, Valgene W.
Description: Summary of the Attwater's prairie chicken, including differences versus other prairie chickens, habits, habitat, limiting factors, management, and threat of extinction due to exploitation by man.
Contributing Partner: UNT Libraries Government Documents Department
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