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Application of Spring Tabs to Elevator Controls

Description: Equations are presented for calculating the stick-force characteristics obtained with a spring-tab type of elevator control. The main problems encountered in the design of a satisfactory elevator spring tab are to provide stick forces in the desired range, to maintain the force per g sufficiently constant throughout the speed range, to avoid undesirable "feel" of the control in ground handling or in flight at low airspeeds, and to prevent flutter. Examples are presented to show the design featu… more
Date: November 24, 1944
Creator: Phillips, William H.
open access

Cavalry reconnaissance troop, mechanized.

Description: "The scope of the manual includes discussion and illustration of organization, equipment, training, and methods of employment of the mechanized cavalry reconnaissance troop and its components, designed to simplify and speed training and to facilitate understanding of basic doctrine."
Date: February 24, 1944
Creator: United States. War Department.
open access

Experiments on Drag of Revolving Disks, Cylinders, and Streamline Rods at High Speeds

Description: An experimental investigation concerned primarily with the extension of test data on the drag of revolving disks, cylinders, and streamline rods to high Mach numbers and Reynolds numbers is presented. A Mach number of 2.7 was reached for revolving rods with Freon 113 as the medium. The tests on disks extended to a Reynolds number of 7,000,000" (p. 367).
Date: April 24, 1944
Creator: Theodorsen, Theodore & Regier, Arthur

Newsmap. For the Armed Forces. 241st week of the war, 123rd week of U.S. participation

Description: Front: Text describes action on various war fronts: Eastern front; Italy; air war; Southeast Asia; Pacific. Maps: Communications centers hit in the Balkans; Crimea. Includes 7 photographs. Back: Smoke. Description of 4 ways to produce smoke for combat purposes. 1 illustration. 9 photographs.
Date: April 24, 1944
Creator: [United States.] Army Service Forces. Army Information Branch.

Newsmap. Monday, January 24, 1944 : week of January 13 to January 20, 228th week of the war, 110th week of U.S. participation

Description: Front: Text describes action on various war fronts: USSR, Italy, Air war, Southwest Pacific, Burma. Map shows Allied advances during the week. Photographs: Cruiser U.S.S. Duluth shortly before being christened; Petty Officer Alex Holgate acknowledges a voice order during gunnery exercises; Bows-on view of a 10,000 ton Independence class carriers; Jungle training involving .30 caliber air-cooled machine guns; Italian refugees pass disabled American tanks; Italian battlescape near San Vitore;… more
Date: January 24, 1944
Creator: [United States.] Army Service Forces. Morale Services Division. Army Information Branch.
open access

Solid residue

Description: This document is a letter written February 24, 1944, concerning solids found when evaporating water from the Columbia River.
Date: February 24, 1944
Creator: Greenewalt, C. H.
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