75-mm howitzer materiel. (open access)

75-mm howitzer materiel.

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.
Date: June 21, 1941
Creator: United States. Army. Ordnance Department.
System: The UNT Digital Library
Aerial photography. (open access)

Aerial photography.

A training manual designed to teach aerial photography for military purposes.
Date: July 8, 1941
Creator: United States. War Department.
System: The UNT Digital Library
Airship aerodynamics. (open access)

Airship aerodynamics.

"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.)
Date: February 11, 1941
Creator: United States. War Department.
System: The UNT Digital Library
Ordnance maintenance : prismatic compass, M1918. (open access)

Ordnance maintenance : prismatic compass, M1918.

Describes the Prismatic Compass, M1918 and provides instructions for its operation, maintenance, and its functions in relation to various types of field artillery.
Date: July 17, 1941
Creator: United States. War Department.
System: The UNT Digital Library
Orientation (open access)

Orientation

Provides a text and reference book covering the principles of orientation. Orientation is defined as "the accurate location of datum points and the establishment of lines of known length and direction".
Date: July 15, 1941
Creator: United States. War Department.
System: The UNT Digital Library
Airplane structures. (open access)

Airplane structures.

Describes structural details of service airplanes used by the Army Air Corps, sufficient for personnel to perform inspection and maintenance of their equipment.
Date: October 29, 1941
Creator: United States. War Department.
System: The UNT Digital Library
Heat treating and inspection of metals (open access)

Heat treating and inspection of metals

This report discusses these topics: I. Principles of heat treating -- II. Heat-treating equipment -- III. General heat treatment of steel -- IV. Specific heat treatments for aircraft steels -- V. General heat treatment of aluminum alloys -- VII. Hardness testing -- VIII. Magnaflux inspection.
Date: September 10, 1941
Creator: United States. War Department.
System: The UNT Digital Library