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Analysis of the High-Altitude Cooling of the Ranger SGV-770 D-4 Engine in the Bell XP-77 Airplane

Description: Report presenting an analysis of the cooling installation in the high-altitude XP-77 airplane for the entire altitude range. The engine was tested with the same cylinders, aluminum fins, and turbulent-flow baffles proposed for the high-altitude SCV-770 engine. The report is incomplete.
Date: October 1943
Creator: Nielsen, Jack N. & Schumacher, Lloyd E.
Item Type: Refine your search to only Report
open access

Analysis of Wind-Tunnel Stability and Control Tests in Terms of Flying Qualities in Full-Scale Airplanes

Description: From Summary: "The analysis of results of wind-tunnel stability and control tests of powered airplane models in terms of the flying qualities of full-scale airplanes is advocated. In order to indicate the topics upon which comments are considered desirable in the report of a wind-tunnel stability and control investigation and to demonstrate the nature of the suggested analysis, the present NACA flying-qualities requirements are discussed in relation to wind-tunnel tests. General procedures for … more
Date: October 1943
Creator: Kayten, Gerald G.
Item Type: Refine your search to only Report
open access

Certain Mechanical Strength Properties of Aluminum Alloys 25S-T and X76S-T

Description: Note presenting tests made to determine certain mechanical strength properties of 25S-T aluminum alloy. Results are presented from static tests in tension and torsion, bending fatigue tests employing three different types of testing machines, and from impact tests of notched and unnotched specimens in tension as well as Charpy impact tests made at several low temperatures. These are made in order to study the stresses that propeller blades experience.
Date: October 1943
Creator: Dolan, Thomas J.
Item Type: Refine your search to only Report
open access

Critical Stresses for Plates

Description: Report presenting the basic methods of theoretically calculating the critical stress for plates with elastically restrained edges. Design charts for various types of sections and columns and critical stress for flat plates and curved sheets are provided.
Date: October 1943
Creator: Lundquist, Eugene E. & Schuette, Evan H.
Item Type: Refine your search to only Report
open access

The Diffusion Length and the Utilization of Thermal Neutrons in a Heterogeneous Pile

Description: Abstract: "An accurate calculation is given for the quantity which corresponds to the diffusion length in the theory of the pile. The procedure is to establish a relationship between the diffusion length and the change in thermal utilization from a pile with infinite sides to one with sides of a finite length. The calculation of this change in the thermal utilization is then carried through. Approximation to the answer and numerically exact calculations are given in the report. The results show… more
Date: October 6, 1943
Creator: Plass, Gilbert N.
Item Type: Refine your search to only Report
open access

The effect of altitude on bomber performance

Description: Report presenting a study devoted to the analysis of the effect of design and operating altitude on the performance of bombers. The primary emphasis is on range performance and charts are presented with range as a function of wing loading, power loading, and design altitude. Results regarding the range at maximum L/D, range at constant power, and performance charts are provided.
Date: October 1943
Creator: Hill, Paul R. & Crigler, John L.
Item Type: Refine your search to only Report
open access

Effect of Length-Beam Ration on Resistance and Spray of Three Models of Flying-Boat Hulls

Description: Report presenting an investigation of the effect of changes in the length-beam ratio of flying-boat hulls on resistance and spray. A family of three models of hulls of different length-beam ratios was used and, in order to maintain comparable hull sizes, the plan-form areas of the hulls were made approximately equal by keeping equal products of length and beam. Results regarding resistance, spray, and take-off performance are provided.
Date: October 1943
Creator: Bell, Joe W.; Garrison, Charlie C. & Zeck, Howard
Item Type: Refine your search to only Report
open access

Effect of pH on strength of resin bonds

Description: Report presenting an investigation to determine the effect of acid on the strength and aging properties of various types of resin bonds for plywood. The pH values of the birch plywoods, flexural and impact strengths before and after aging of birch plywoods bonded with urea-formaldehyde resins and phenolic resins, and delamination properties of birch plywoods bonded with each type of resin are provided.
Date: October 1943
Creator: Rinker, R. C.; Reinhart, F. W. & Kline, G. M.
Item Type: Refine your search to only Report
open access

Flying qualities of a twin-engine patrol airplane as estimated from wind-tunnel tests

Description: Report presenting an estimate of the flying qualities of a twin-engine patrol airplane from wind-tunnel test results in comparison with flight observations as a possible guide in determining changes which would be necessary to improve these qualities. Results regarding the longitudinal and lateral stability and control of this airplane are provided.
Date: October 1943
Creator: Stevens, Victor I., Jr.
Item Type: Refine your search to only Report
open access

Free-Flight-Tunnel Investigation of the Effect of Mode of Propeller Rotation Upon the Lateral-Stability Characteristics of a Twin-Engine Airplane Model With Single Vertical Tails of Different Size

Description: Report presenting an investigation of the effect of direction of propeller rotation on the dynamic lateral stability characteristics of a twin-engine airplane model equipped with single vertical tails of three different sizes. The effects of flap deflection and amount of power were also studied. The most satisfactory lateral-stability characteristics of the model in flight were encountered for the model with large vertical-tail areas.
Date: October 1943
Creator: Pitkin, Marvin
Item Type: Refine your search to only Report
open access

Heat Transfer Over the Circumference of a Heated Cylinder in Transverse Flow

Description: "A method for recording the local heat-transfer coefficients on bodies in flow was developed. The cylinder surface was kept at constant temperature by the condensation of vapor except for a narrow strip which is heated separately to the same temperature by electricity. The heat-transfer coefficient at each point was determined from the electric heat output and the temperature increase" (p. 1).
Date: October 1943
Creator: Schmidt, Ernst & Wenner, Karl
Item Type: Refine your search to only Report
open access

Investigation of surface irregularities on an NACA 63(420)-416, a=1.0 airfoil section for the Glenn L. Martin Company design 195

Description: Report presenting the results of an investigation made in the two-dimensional low-turbulence pressure tunnel of surface irregularities on a low-drag airfoil section. The primary objective was to determine the effects of riveted and piano-hinge-type skin joints and of an aileron slot of the drag characteristics. Any type of surface irregularities at the front spar were found to cause substantial increase in drag.
Date: October 1943
Creator: Braslow, Albert L.
Item Type: Refine your search to only Report
open access

The Measurement of Fuel-Air Ratio by Analysis of the Oxidized Exhaust Gas

Description: "An investigation was made to determine a method of measuring fuel-air ratio that could be used for test purposes in flight and for checking conventional equipment in the laboratory. Two single-cylinder test engines equipped with typical commercial engine cylinders were used. The fuel-air ratio of the mixture delivered to the engines was determined by direct measurement of the quantity of air and of fuel supplied and also by analysis of the oxidized exhaust gas and of the normal exhaust gas" (p… more
Date: October 1, 1943
Creator: Gerrish, Harold C. & Meem, J. Lawrence, Jr.
Item Type: Refine your search to only Report
open access

National Safety Competition of 1942

Description: Report issued by the U.S. Bureau of Mines on its annual safety contest between mine workers. Different types of mines enrolled in the competition and the winners and honorable mentions for 1942 are presented. This report includes tables.
Date: October 1943
Creator: Adams, William Waugh & Lawrence, T. D.
Item Type: Refine your search to only Report

Newsmap. Monday, October 4, 1943 : week of September 23 to September 30, 212th week of the war, 94th week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Corsica, Russia, New Georgia, Gilbert Is., Ellice Is., New Guinea, Western Europe. Maps show Northeast New Guinea; central Italy; Italy, Yugoslavia, Sardinia, Sicily, Tunisia. All maps show Nazi or Japanese occupied areas. Includes photographs: Naples, On the beach at Salerno, Smoke screen over Palermo, Ship with a mouth. Back: A mournful melody, or, a dud dood it again : and watch out for booby traps! 8 cartoon panels graphically d… more
Date: October 4, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, October 11, 1943 : week of September 30 to October 7, 213th week of the war, 95th week of U.S. participation

Description: Front: Text describes action on various war fronts: Aegean Sea, Italy, Corsica, Russia, Norway, Southwest Pacific, Air offensive. Maps show Greece and Turkey, Eastern front, Central Italy. Includes photographs: Soldier killed by booby-trap, "Battleship X" is the USS South Dakota, Brenner Pass, Resting American soldiers following a battle in Munda. Back: Typical German infantry regiment. Illustration shows regiment. Text gives detailed description of Regimental Headquarters Company, Battalion… more
Date: October 11, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, October 18, 1943 : week of October 7 to October 14, 214th week of the war, 96th week of U.S. participation

Description: Front: Text describes action on various war fronts: Russia, Central Italy, Italy, Azores, Air offensive, Norway, Southwest Pacific, Wake. Large world map shows United Nations, Axis and Axis occupied areas, countries with Axis relations broken, and neutral countries. Includes inset maps: Eastern Europe, Roads to Rome, the globe, Scene of combined operations in the southwest Pacific. Photographs: Burma bombing campaign, Modern road to Rome, Wake Island, Tailgunner Sergt. Harris Goldberg of Broo… more
Date: October 18, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, October 25, 1943 : week of October 14 to October 21, 215th week of the war, 97th week of U.S. participation

Description: Front: Text describes action on various war fronts: Russia, Italy, Schweinfurt, Southwest Pacific, Burma, North Pacific, U.S. subs. Inset maps: Bridgeheads across the Dnepr River, [Pacific Ocean off coast of New Guinea], [Areas in Southern Europe providing targets for bomber forces], Operations begin in Burma. Photographs: Nazis use Soviet equipment and men in battle for Italy, Soviet soldier and RAF officer, Lieut. Col. Chesley G. Peterson, Salt Lake City, Fuel pipe lines, Fifth Army engine… more
Date: October 25, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster
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