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The Coupling of Flexural Propeller Vibrations with the Torsional Crankshaft Vibrations

Description: The exact mathematical treatment of the problem is possible by replacing the propeller blade by a homogeneous prismatic rod. Conclusions can them be drawn as to the behavior of an actual propeller, since tests on propeller blades have indicated a qualitative agreement with the homogeneous rod. The natural frequencies are determined and the stressing of the systems under the various vibration modes are discussed.
Date: December 1, 1943
Creator: Meyer, J.

Determination of the Mass Moments and Radii of Inertia of the Sections of a Tapered Wing and the Center-of-Gravity Line along the Wing Span

Description: For computing the critical flutter velocity of a wing among the data required are the position of the line of centers of gravity of the wing sections along the span and the mass moments and radii of inertia of any section of the wing about the axis passing through the center of gravity of the section. A sufficiently detailed computation of these magnitudes even if the weights of all the wing elements are known, requires a great deal of time expenditure. Thus a rapid competent worker would require from 70 to 100 hours for the preceding computations for one wing only, while hundreds of hours would be required if all the weights were included. With the aid of the formulas derived in the present paper, the preceding work can be performed with a degree of accuracy sufficient for practical purposes in from one to two hours, the only required data being the geometric dimensions of the outer wing (tapered part), the position of its longerons, the total weight of the outer wing, and the approximate weight of the longerons, The entire material presented in this paper is applicable mainly to wings of longeron construction of the CAHI type and investigations are therefore being conducted by CAHI for the derivation of formulas for the determination of the preceding data for wings of other types.
Date: December 1, 1943
Creator: Savelyev, V. V.

Flight Tests of Various Tail Modifications on the Brewster XSBA-1 Airplane II : Measurements of Flying Qualities with Tail Configuration Number Two

Description: Several tail modifications of the Brewster XSBA-1 scout-bomber were investigated and results compared. Modifications consisted of variation of the chord of the elevator and rudder while the total area of the surfaces is kept constant and variations of the total area of the vertical tail surface. Configuration number 2 reduced trim changes by 50 percent and reduced average elevator control force gradient from 30 to 27 pounds/g. Stick travel required to stall in maneuver was 4.6 inches.
Date: December 1, 1943
Creator: Phillips, W.H. & Crane, H.L.

Heat Transfer and Hydraulic Flow Resistance for Streams of High Velocity

Description: Problems of hydraulic flow resistance and heat transfer for streams with velocities comparable with acoustic have present great importance for various fields of technical science. Especially, they have great importance for the field of heat transfer in designing and constructing boilers.of the "Velox" type. In this article a description of experiments and their results as regards definition of the laws of heat transfer in differential form for high velocity air streams inside smooth tubes are given.
Date: December 1, 1943
Creator: Lelchuk, V. L.

Investigation of flow in an axially symmetrical heated jet of air

Description: The work done under this contract falls essentially into two parts: the first part was the design and construction of the equipment and the running of preliminary tests on the 3-inch jet, carried out by Mr. Carl Thiele in 1940; the second part consisting in the measurement in the 1-inch jet flow in an axially symmetrical heated jet of air. (author).
Date: December 1, 1943
Creator: Corrsin, Stanley

Newsmap. Monday, December 6, 1943 : week of November 25 to December 2, 221st week of the war, 103rd week of U.S. participation

Description: Text describes action on various war fronts: Italy, USSR, Germany, Central Pacific, Southwest Pacific, China, Plans. Inset maps: central Italy, northeast New Guinea, Action areas in central and southwest Pacific, Truk Is., Nauru, Wotje, Jaluit, Makin, Tarawa. Photographs: Australian Air Force Beaufighter, Sgt. Ben Kuroki of Hershey, Nebraska, Captured Soviet equipment, Rescued blindfolded Nazi. German built road in Isernia. Back: Text and 11 illustrations highlight the 11 general orders that must be known by sentinels.
Date: December 6, 1943
Creator: [United States.] Army Orientation Course

Newsmap. Monday, December 13, 1943 : week of December 2 to December 9, 222nd week of the war, 104th week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, U.S.S.R., air offensive, Marshal Is[lands], southwest Pacific, [Teheran] conference. Map shows Nazi-dominated areas of Europe. Photographs: Marshal Stalin, President Roosevelt, and Prime Minister Churchill at Teheran conference (4 photographs); The Air Offensive - 8th Air Force bombes en route - Target Bremen. Back: A sign of comradeship... Includes illustration and "Li'l Abner" cartoons.
Date: December 13, 1943
Creator: [United States.] Army Orientation Course

Newsmap. Monday, December 20, 1943 : week of December 9 to December 16, 223rd week of the war, 105th week of U.S. participation

Description: Front: Text describes action on various war fronts: Southwest Pacific, Central Pacific, China, USSR, Italy, Air offensive, Submarines. Inset maps: Southeast Europe, Central China battle area. Photographs: U.S. Army engineers replace a bridge in Italy, Antiaircraft fire from a U.S. carrier, Brazilian ground and air troops, Turkish officials, "Rome or Death." Back: Text and photographs illustrate the battle for the Gilbert Islands.
Date: December 20, 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. Bernard Montgomery commander of the British Eighth Army explains battle strategy to Soviet generals: Maj. Gen. Vasiliev and Maj. Gen. Solodvnik. Back: Map showing Japanese controlled areas. Inset maps illustrate Japanese territorial acquisitions over time. Includes "Text of the general statement issued after the Cairo conference attended by President Roosevelt, Generalissimo Chiang Kai-shek and Prime Minister Churchill, together with their respective military and diplomatic advisers."
Date: December 27, 1943
Creator: [United States.] Army Orientation Course