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Aerodynamic and Hydrodynamic Tests of a Family of Models of Flying-Boat Hulls Derived From a Streamline Body: NACA Model 84 Series

Description: Report presenting a series of related flying-boat hull forms with various combinations of aerodynamic and hydrodynamic requirements that were tested in an NACA tank and high-speed tunnel. Effects explored included varying the height of the bow, varying the height of the stern, increasing the angle of dead rise at the bow, decreasing the angle of dead rise on the afterbody, increasing the depth of step, increasing the angle of afterbody keel, adding chine flare, adding a third planing surface, a… more
Date: September 1943
Creator: Parkinson, John B.; Olson, Roland E.; Draley, Eugene C. & Luoma, Arvo A.
Item Type: Refine your search to only Report
open access

An Approximate Method of Shear-Lag Analysis for Beams Loaded at Right Angles to the Plane of Symmetry of the Cross Section

Description: Report discussing strain measurements made on a box beam of triangular cross section and on two beams of D-section under transverse bending. Information about the arrangement of the beams and experimental and calculated stresses for different boxes.
Date: September 1943
Creator: Kuhn, Paul & Brilmyer, Harold G.
Item Type: Refine your search to only Report
open access

Calculated and measured turning performance of a Navy F2A-3 airplane as affected by the use of flaps

Description: Report presenting results of flight tests to determine the turning performance of a Navy F2A-3 airplane over a range of speeds for three flap deflections at two altitudes. The results are correlated with an analytical study of turning performance in which the effect of thrust on maximum lift coefficient was considered.
Date: September 1943
Creator: Clousing, Lawrence A.; Gadeberg, Burnett L. & Kauffman, William M.
Item Type: Refine your search to only Report
open access

Critical Compressive Stress for Curved Sheet Supported Along All Edges and Elastically Restrained Against Rotation Along the Unloaded Edges

Description: "A formula is given for the critical compressive stress for slightly curved sheet with equal elastic restraints against rotation along the unloaded edges. The theory of small deflections is used and the formula reduces to that given by Timoshenko for the case of simply-supported edges. For larger curvatures, a modification of Redshaw's formula to include the effect of edge restraint is suggested" (p. 1).
Date: September 1943
Creator: Stowell, Elbridge Z.
Item Type: Refine your search to only Report
open access

The Effect of Xylidines on the Load-Carrying Capacity of an Aircraft Engine Oil - 2

Description: Report presenting testing of the effect of xylidines on the load-carrying capacity of an aircraft-engine oil in several test devices. There is also interest in the suitability of xylidines as an antiknock component in aviation gasoline, so xylidines were added to the gasoline mixes used in several different machines.
Date: September 1943
Creator: Olson, Walter T. & Spurr, Robert A.
Item Type: Refine your search to only Report
open access

Effects of Mean-Line Loading on the Aerodynamic Characteristics of Some Low-Drag Airfoils

Description: "The effect of variations in the type of mean line on the section characteristics of several representative NACA low-drag airfoils was investigated. The test results are compared with theoretical predictions and indicate trends that facilitate the choice of mean line in the absence of tests" (p. 1).
Date: September 1943
Creator: Davidson, Milton & Turner, Harold R., Jr.
Item Type: Refine your search to only Report
open access

The Flow of a Compressible Fluid Past a Curved Surface

Description: "An iteration method is employed to obtain the flow of a compressible fluid past a curved surface. The first approximation which leads to the Prandtl-Glauert rule, is based on the assumption that the flow differs but little from a pure translation. The iteration process then consists in improving this first approximation in order that it will apply to a flow differing from pure translatory motion to a greater degree. The method fails when the Mach number of the undisturbed stream reaches unity … more
Date: September 13, 1943
Creator: Kaplan, Carl
Item Type: Refine your search to only Report
open access

General porpoising tests on flying-boat-hull models

Description: Report presenting evidence in support of the propriety of substituting a general porpoising test of flying boat hull models in place of the usual specific test. The results of a general test are presented and compared with the results of a specific test of the same model.
Date: September 1943
Creator: Locke, F. W. S., Jr.
Item Type: Refine your search to only Report
open access

Heat Transfer Through Turbulent Friction Layers

Description: "The "general Prandtl number" Pr(exp 1) - A(sub q)/A Pr, aside from the Reynolds number determines the ratio of turbulent to molecular heat transfer, and the temperature distribution in turbulent friction layers. A(sub q) = exchange coefficient for heat; A = exchange coefficient for momentum transfer. A formula is derived from the equation defining the general Prandtl number which describes the temperature as a function of the velocity" (p. 1).
Date: September 1943
Creator: Reichardt, H.
Item Type: Refine your search to only Report
open access

Magnolia Oil Field, Columbia County, Arkansas: Part 1. Petroleum-Engineering Study; Part 2. Derivation and Application of Material-Balance Equations

Description: Report issued by the U.S. Bureau of Mines on studies conducted at the Magnolia oil fields in Columbia County, Arkansas. History, geology, and methods are presented. This report includes tables, graphs, maps, and illustrations.
Date: September 1943
Creator: Carpenter, Charles B.; Schroeder, H. J. & Cook, Alton B.
Item Type: Refine your search to only Report
open access

Measurements of the flying qualities of a Bell P-39D-1 airplane (AAF NO. 41-28378)

Description: Report discussing an investigation of the flight qualities of the Bell P-39D-1 airplane. Information about the longitudinal stability and control characteristics, lateral and directional stability and control, stalling characteristics, and control friction is provided.
Date: September 21, 1943
Creator: Johnson, Harold I.; Liddell, C. J. & Hoover, H. H.
Item Type: Refine your search to only Report
open access

NACA Investigation of a Jet-Propulsion System Applicable to Flight

Description: "Following a brief history of the NACA investigation of jet propulsion, a discussion is given of the general investigation and analysis leading to the construction of the jet-propulsion ground-test mock-up. The results of burning experiments and of test measurements designed to allow quantitative flight performance predictions of the system are presented and correlated with calculations. These calculations are then used to determine the performance of the system on the ground and in the air at … more
Date: September 17, 1943
Creator: Ellis, Macon C., Jr. & Brown, Clinton E.
Item Type: Refine your search to only Report

Newsmap. Monday, September 6, 1943 : week of August 26 to September 2, 208th week of the war, 90th week of U.S. participation

Description: Front: Text describes action on various war fronts: Germany, Russia, Italy, Denmark, Sweden, New Georgia, New Guinea, Marcus Island. Maps show air offensive in western Europe, New Georgia Is., Russian front. Includes photographs: Army Air Forces report on Warnemunde; Tough customer [Gourmiers, Berber fighting men]; The first wave [Yanks at Rendova I.]. Back: Typical German infantry division. Illustration of a division with descriptive text keyed to the illustration. Regiments described inclu… more
Date: September 6, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, September 13, 1943 : week of September 2 to September 9, 209th week of the war, 91st week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Yugoslavia, Air offensive, Southwest Pacific, Russia. Maps show military activities in Eurasia and New Guinea near Salamaua with boxed text highlighting action. Photograph: A story of blood [American soldier receives a transfusion while lying on the street in Santa Agata, Sicily while townspeople look on]. Back: Something money can't buy - United States Army tradition! Illustration shows service ribbons of service medals. Text descr… more
Date: September 13, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, September 20, 1943 : week of September 9 to September 16, 210th week of the war, 92nd week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Italian fleet, Mussolini, Russia, Rhodes, New Guinea, Paramushiro. Inset maps of Eastern Europe from France to Turkey and of Papua, Northeast New Guinea and New Britain. Includes photographs and captions "released by the Nazis and received in the United States through neutral Portugal and Sweden." Back: Battleground in Italy. Map of Italy with inset map of the countries surrounding Italy.
Date: September 20, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

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.
Item Type: Refine your search to only Poster
open access

Notes on the Effect of Surface Distortions on the Drag and Critical Mach Number of Airfoils

Description: "The effect of two-dimensional bumps and surface waviness on the pressure distribution over airfoils is considered. It is shown that the results of the analysis may be useful in evaluating the effects of accidental or intended surface distortions on the drag and critical Mach number of airfoils" (p. 1).
Date: September 1943
Creator: Allen, H. Julian
Item Type: Refine your search to only Report
open access

Notes on the Skipping of Seaplanes

Description: Report discusses five tests related to seaplane skipping and attempts to prevent it by changing the depths of step to avoid large suction force on the afterbody generated by the flow behind a shallow step. Flying boats of various sizes and weights were tested during landing and several degrees of trim were tested for boats that had a particularly shallow step. Design suggestions for future flying boats are also included.
Date: September 1943
Creator: Parkinson, John B.
Item Type: Refine your search to only Report
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