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Newsmap. Monday, April 27, 1942 : week of April 17 to 24

Description: Text describes action on various war fronts. Includes photographs: Lieut. Bulkeley -- Nip Nipper de luxe, Lieut. Comm. Edward H. O'Hare -- Brewster "Buffalo" -- The guns were going on -- The big Wellingtons did not rest -- Training of airborne Infantry. Large world map is keyed to text: Japs confused on raid -- Chinese rescue British -- Corregidor holds -- Timor fight still on -- blame set for fire -- President honors flyer -- Gen. Marshall returns -- strike idleness small -- manpower m… more
Date: April 27, 1942
Creator: [United States]. Army Orientation Course.

Newsmap. Monday, July 27, 1942 : week of July 17 to July 24

Description: Front: Text describes action on various war fronts: Southwest Pacific, China, Aleutians, Atlantic, North Africa, Western Europe, Russia. Large world map is keyed to text and illustrates time zones around the world. Includes inset maps: China front, Russian front. Includes seven photographs. Back: Photographs show a variety of tanks utilized by the British Army.
Date: July 27, 1942
Creator: [United States.] Army Orientation Course.

Newsmap. Monday, September 27, 1943 : week of September 16 to September 23, 211th week of the war, 93rd week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Sardinia and Corsica, Russia, Southwest pacific, Dodecanese Is., Gilbert Is., Yugoslavia. Maps show Russian front; European fronts; Jap-controlled territory in Southwest Pacific. Inset map shows battle line of Russian front on July 5th. Includes 7 photographs of war action. Back: Progress of the War : Report from the Chief of Staff to the Secretary of War : 1 July 1941 to 30 June 1943. Extensive text with 2 maps: Deployment of Ame… more
Date: September 27, 1943
Creator: [United States.] Army Orientation Course.

Newsmap. Monday, December 27, 1943 : week of December 16 to December 22, 224th week of the war, 106th week of U.S. participation

Description: Front: Text describes action on various war fronts: USSR, Southwest Pacific, Italy, Air offensive, Yugoslavia. Maps: Eastern front; Netherlands Indies; Southwest New Britain. Photographs: French troops of 2nd Moroccan Division fight in Italy; Half-track loaded with Frenchmen crosses the Volturno; French First Armored Division during maneuvers; B-25 Mitchell bomber; 75mm shell for the cannon on the Mitchell bomber; Japanese destroyer after being hit by shells from the Mitchell bomber; Gen. Be… more
Date: December 27, 1943
Creator: [United States.] Army Orientation Course.

Newsmap. For the Armed Forces. 237th week of the war, 119th week of U.S. participation

Description: Front: Text describes action on various war fronts: Southeast Asia, Italy, USSR, Southwest Pacific, Central Pacific, Kuriles. Maps: Central Pacific; Cassino area; Burma. Insets: Cassino. Includes 6 photographs. Back: USS Ranger. 10 photographs and text illustrate recent operations.
Date: March 27, 1944
Creator: [United States.] Army Service Forces. Morale Services Division. Army Information Branch.

Newsmap. For the Armed Forces. 272nd week of the war, 154th week of U.S. participation

Description: Front: Text describes action on various war fronts: Open general offensive, Armies in action, Italian fighting bitter, Budapest under siege, U.S. planes hit Manila, Japs increase pressure, Ledo-Burma Road. Maps: Leyte progress, Italian front, Allied offensive, Budapest to Miskolc. Back: Text and 12 photographs highlight the "Mulberry" secret floating harbor used with the European invasion.
Date: November 27, 1944
Creator: [United States.] Army Service Forces. Army Information Branch.

Newsmap for the Armed Forces : Japan's empire, its advance and retreat

Description: Front: Text chart of the history of Japan's empire from 1895 to 19 August, 1945. 4 maps: Japanese empire, 1931; Japanese empire, Dec. 1941; Japanese empire, Aug. 1942 ; Japanese holdings as war ended. Back: "Please...get there and back!": contains photographs and text about the Army Transportation Corps. Includes picture of a woman's face.
Date: August 27, 1945
Creator: [United States.] Army Service Forces. Army Information Branch.
open access

On the flying qualities of helicopters

Description: Report presenting the flying qualities problems of current helicopters, including instability with angle of attack in forward flight, control sensitivity in hovering, and control forces following control movement in maneuvers. Some possible solutions to these issues are presented.
Date: January 27, 1949
Creator: Reeder, John P. & Gustafson, F. B.
open access

Low-Speed Investigation of a Small Triangular Wing of Aspect Ratio 2.0 1 The Effect of Combination With a Body Revolution and Height Above a Ground Plane

Description: Memorandum presenting low-speed wind-tunnel test conducted of a triangular wing of aspect ratio 2.0 with a symmetrical double-wedge section with a maximum thickness of 5 percent of the chord at 20 percent of the chord. The wing was also tested in the presence of a ground plane. Results regarding isolated wing and wing-body combinations, split-flap effectiveness, and ground effect are provided.
Date: August 27, 1948
Creator: Rose, Leonard M.
open access

High-speed aerodynamic characteristics of horn and overhang balances on a full-scale elevator

Description: Report presenting high-speed wind tunnel testing of horn- and overhang-balance elevators on a full-scale, semispan, horizontal tail. The effects of unshielding the horn and unsealing the overhang were investigated. Results regarding aerodynamic characteristics, distortions of the tail, and critical Mach numbers are provided.
Date: February 27, 1948
Creator: Cleary, Joseph W. & Krumm, Walter J.
open access

Wind-tunnel investigation of horizontal tails. 5: 45 degree swept-back plan form of aspect ratio 2

Description: Report presenting the results of a wind-tunnel investigation of the low-speed aerodynamic characteristics of a 45 degree sweptback horizontal-tail model of aspect ratio 2 and a comparison of these results with results for a model of the same aspect ratio with an unswept hinge line. Results regarding the lift and hinge-moment parameters, static longitudinal stability, effect of Reynolds number, effect of standard roughness, effect of removing elevator nose seal, and visualization of the air flow… more
Date: September 27, 1949
Creator: Dods, Jules B., Jr.
open access

Flight Investigation From High Subsonic to Supersonic Speeds to Determine the Zero-Lift Drag of a Transonic Research Vehicle Having Wings of 45 Degree Sweepback, Aspect Ratio 4, Taper Ratio 0.6, and NACA 65A006 Airfoil Sections

Description: Report presenting rocket-powered flight tests from high subsonic to supersonic speeds and at high Reynolds numbers to determine the zero-lift drag of a transonic wing-body and body-alone configuration. The configuration tested featured a wing of 45 degree sweepback, aspect ratio 4, taper ratio 0.6, and an NACA 65A006 airfoil section, and a body of fineness ratio of 10 and a frontal area equal to 6.06 percent of the wing-plan-form area.
Date: October 27, 1949
Creator: Katz, Ellis
open access

Experimental Pressure Distributions Over Wing Tips at Mach Number 1.9 1 - Wing Tip With Subsonic Leading Edge

Description: An investigation was conducted at a Mach number of 1.91 to determine spanwise pressure distribution over a wing tip in a region influenced by a sharp subsonic leading edge swept back at 70 degrees. Except for pressure distribution on the top surface in the immediate vicinity of the subsonic leading edge, the maximum difference between linearized theory and experimental data was 2 1/2 percent (of free-stream dynamic pressure) for angles of attack up to 4 degrees and 7 percent for angles of attac… more
Date: January 27, 1949
Creator: Jagger, James M. & Mirels, Harold
open access

Aerodynamic Characteristics of Several NACA Airfoil Sections at Seven Reynolds Numbers From 0.7 X 10(Exp 6) to 9.0 X 10(Exp 6)

Description: Report presenting an investigation of the two-dimensional aerodynamic characteristics of several NACA airfoil sections at four Reynolds numbers. Results regarding the minimum drag, maximum lift, lift-curve slope, and angle of zero lift and pitching moment are provided.
Date: May 27, 1948
Creator: Loftin, Laurence K., Jr. & Poteat, M. Irene
open access

Lateral-Control Investigation on a 37 Degree Sweptback Wing of Aspect Ratio 6 at a Reynolds Number of 6,800,000

Description: Memorandum presenting the low-speed lateral-control characteristics of a 37 degree sweptback semispan wing of aspect ratio 6 and NACA 64-series airfoil sections in the 19-foot pressure tunnel. The investigation included the measurement of the hinge-moment characteristics of an aileron and the rolling-effectiveness characteristics of the aileron and two configurations of spoilers.
Date: January 27, 1949
Creator: Graham, Robert R. & Koven, William
open access

High-Speed Aerodynamic Characteristics of a Lateral-Control Model 1: NACA 0012-64 Section with 20-Percent-Chord Plain Aileron and 0 Degree and 45 Degrees Sweepback

Description: Memorandum describing wind-tunnel tests made to determine the aerodynamic characteristics of a 20-percent-chord plain aileron on a semispan wing with the NACA 0012-64 section. The report includes the results of tests of the wing unswept and swept back 45 degrees and with the aileron deflected from 0 to 10 degrees.
Date: September 27, 1948
Creator: Anderson, Joseph L. & Krumm, Walter J.
open access

Theoretical comparison of several methods of thrust augmentation for turbojet engines

Description: "A theoretical investigation of tail-pipe burning, water injection at the compressor inlet, combination tail-pipe burning plus water injection, bleedoff, and rocket-assist methods thrust augmentation for turbojet engines was made for an engine representative of those in current use. The effect of augmented liquid ratio on augmented thrust ratio and the effects of altitude and flight Mach number on the performance of various methods were determined. The additional take-off weight involved by the… more
Date: October 27, 1948
Creator: Hall, Eldon W. & Wilcox, E. Clinton
open access

Bending of Rectangular Plates With Large Deflections

Description: "The solution of Von Karman's fundamental equations for large deflections of plates is presented for the case of a simply supported rectangular plate under combined edge compression and lateral loading. Numerical solutions are given for square plates and for rectangular plates with a width-span ratio of 3:1. The effective widths under edge compression are compared with effective widths according to Von Karman, Bengston, Marguerre, and Cox and with experimental results by Ramberg, Mcpherson, and… more
Date: May 27, 1941
Creator: Levy, Samuel
open access

The Theory of Propellers 1: Determination of the Circulation Function and the Mass Coefficient for Dual-Rotating Propellers

Description: "Values of the circulation function have been obtained for dual-rotating propellers. Numerical values are given for four, eight, and twelve-blade dual-rotating propellers and for advance ratios from 2 to about 6. In addition, the circulation function has been determine for single-rotating propellers for the higher values of the advance ratio. The mass coefficient, another quantity of significance in propeller theory, has been introduced" (p. 35).
Date: May 27, 1944
Creator: Theodorsen, Theodore
open access

Bending and shear stresses developed by the instantaneous arrest of the root of a moving cantilever beam

Description: A theoretical and experimental investigation has been made of the behavior of a cantilever beam in transverse motion when its root is suddenly brought to rest. Equations are given for determining the stresses, the deflections, and the accelerations that arise in the beam as a result of the impact. The theoretical equations, which have been confirmed experimentally, reveal that, at a given percentage of the distance from root to tip, the bending stresses for a particular mode are independent of … more
Date: September 27, 1944
Creator: Stowell, Elbridge Z.; Schwartz, Edward B. & Houbolt, John C.
open access

Effect of Maximum Cruise-Power Operation at Ultra-Lean Mixture and Increased Spark Advance on the Mechanical Condition of Cylinder Components

Description: "A continuous 50-hour test was conducted to determine the effect of maximum cruise-power operation at ultra-lean fuel-air mixture and increased spark advance on the mechanical conditions of cylinder components. The test was conducted on a nine-cylinder air-cooled radial engine at the following conditions:brake horsepower, 750; engine speed, 1900 rpm; brake mean effective pressure, 172 pounds per square inch; fuel-air ratio, 0.052; spark advance, 30 deg B.T.C.; and maximum rear-spark-plug-bushin… more
Date: September 27, 1945
Creator: Harris, Herbert B.; Duffy, Robert T. & Erwin, Robert D., Jr.
open access

Dynamics of a turbojet engine considered as a quasi-static system

Description: From Summary: "A determination of the dynamic characteristics of a typical turbojet engine with a centrifugal compressor, a sonic-flow turbine-nozzle diaphragm, and fixed area exhaust nozzle is presented. A generalized equation for transient behavior of the engine was developed; this equation was then verified by calculations using compressor and turbine performance charts extrapolated from equilibrium operating data and by experimental data obtained from an engine operated under transients in … more
Date: July 27, 1949
Creator: Otto, Edward W. & Taylor, Burt L., III
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