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Fire Tests of Building Columns

Description: Technical paper issued by the Bureau of Mines over studies conducted on fire resistance on building columns. As stated in the introduction, "the purpose of this investigation is to ascertain (1) the ultimate resistance against fire, of protected and unprotected columns as used in the interior of buildings; (2) their resistance against impact and sudden cooling from hose streams when in a highly heated condition" (p. 12). This paper includes tables, illustrations.
Date: April 21, 1921
Creator: Ingberg, S. H.; Griffin, H. K.; Robinson, W. C. & Wilson, R. E.
Item Type: Refine your search to only Report
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Large-scale aerodynamic characteristics of airfoils as tested in the variable density wind tunnel

Description: From Summary: "In order to give the large-scale characteristics of a variety of airfoils in a form which will be of maximum value, both for airplane design and for the study of airfoil characteristics, a collection has been made of the results of airfoil tests made at full-scale values of the Reynolds number in the variable density wind tunnel of the National Advisory Committee for Aeronautics. They have been corrected for tunnel wall interference and are presented not only in the conventional … more
Date: October 21, 1929
Creator: Jacobs, Eastman N. & Anderson, Raymond F.
Item Type: Refine your search to only Report
open access

Pressure Distribution Over a Thick, Tapered and Twisted Monoplane Wing Model-N.A.C.A. 81-J

Description: "This reports presents the results of pressure distribution tests on a thick, tapered and twisted monoplane wing model. The investigation was conducted for the purpose of obtaining data on the aerodynamic characteristics of the new wing and to provide additional information suitable for use in the design of tapered cantilever wings. The tests included angles of attack up to 90 degrees. The span loading over the wing was approximately of elliptical shape, which gave rise to relatively small bend… more
Date: May 21, 1930
Creator: Wenzinger, Carl J.
Item Type: Refine your search to only Report
open access

Combustion in a High-Speed Compression-Ignition Engine

Description: "An investigation conducted to determine the factors which control the combustion in a high-speed compression-ignition engine is presented. Indicator cards were taken with the Farnboro indicator and analyzed according to the tangent method devised by Schweitzer. The analysis show that in a quiescent combustion chamber increasing the time lag of auto-ignition increases the maximum rate of combustion. Increasing the maximum rate of combustion increases the tendency for detonation to occur" (p. 63… more
Date: May 21, 1931
Creator: Rothrock, A. M.
Item Type: Refine your search to only Report
open access

The drag of airplane wheels, wheel fairings, and landing gears 2: nonretractable and partly retractable landing gears

Description: This is the second report giving the results obtained in the NACA 20-foot wind tunnel on the drag due to landing gears. The present report gives the results of tests of nonretractable and partly retractable landing gears intended for heavier low-wing monoplanes of the transport and bomber type.
Date: June 21, 1934
Creator: Biermann, David & Herrnstein, William H., Jr.
Item Type: Refine your search to only Report
open access

The drag of airplane wheels, wheel fairings, and landing gears - 3

Description: The tests reported in this report conclude the investigation of landing-gear drag that has been carried out in the NACA 20-foot wind tunnel. They supplement earlier tests (reported in Technical Report No. 485) made with full-scale dummy wheels, wheel fairings, and landing gears intended for airplanes of 3,000 pounds gross weight and include tests of tail wheels and tail skids.
Date: November 21, 1934
Creator: Herrnstein, William H., Jr. & Biermann, David
Item Type: Refine your search to only Report
open access

Spinning characteristics of wings 1: rectangular Clark Y monoplane wing

Description: "A series of wind tunnel tests of a rectangular Clark Y wing was made with the NACA spinning balance as part of a general program of research on airplane spinning. All six components of the aerodynamic force and moment were measured throughout the range of angles of attack, angles of sideslip, and values omega b/2v likely to be attained by a spinning airplane; the results were reduced to coefficient form. It is concluded that a conventional monoplane with a rectangular Clark y wing can be made … more
Date: November 21, 1934
Creator: Bamber, M. J. & Zimmerman, C. H.
Item Type: Refine your search to only Report
open access

Wing-nacelle-propeller interference for wings of various spans force and pressure-distribution tests

Description: Report presents the results of an experimental investigation made in the NACA full-scale wind tunnel to determine the effect of wing span on nacelle-propeller characteristics and, reciprocally, the lateral extent of nacelle and propeller influence on a monoplane wing. The results provide a check on the validity of the previous research on nacelles and propellers with 15-foot-span wings tested in the 20-foot wind tunnel and reported in technical reports 415, 462, 505, 506, and 507.
Date: April 21, 1936
Creator: Robinson, Russell G. & Herrnstein, William H., Jr.
Item Type: Refine your search to only Report
open access

Span load distribution for tapered wings with partial-span flaps

Description: Tables are given for determining the load distribution of tapered wings with partial-span flaps placed either at the center or at the wing tips. Seventy-two wing-flap combinations, including two aspect ratios, four taper ratios, and nine flap lengths, are included. The distributions for the flapped wing are divided into two parts, one a zero lift distribution due primarily to the flaps and the other an additional lift distribution due to an angle of attack of the wing as a whole. Comparison bet… more
Date: November 21, 1936
Creator: Pearson, H. A.
Item Type: Refine your search to only Report
open access

Tests in the variable-density wind tunnel of the NACA 23012 airfoil with plain and split flaps

Description: From Summary: "Section characteristics for use in wing design are presented for the NACA 23012 airfoil with plain and split flaps of 20 percent wing chord at a value of the effective Reynolds number of about 8,000,000. The flap deflections covered a range from 60 degrees upward to 75 degrees downward for the plain flap and from neutral to 90 degrees downward for the split flap. The split flap was aerodynamically superior to the plain flap in producing high maximum lift coefficients and in havin… more
Date: January 21, 1938
Creator: Abbott, Ira H. & Greenberg, Harry
Item Type: Refine your search to only Report
open access

75-mm howitzer materiel.

Description: This is a World War II-era technical manual for the 75mm Howitzer. It contains information on use, maintenance, assembly, and other aspects of this weapon.
Date: June 21, 1941
Creator: United States. Army. Ordnance Department.
Item Type: Refine your search to only Book
open access

Analysis of Heat and Compressibility Effects in Internal Flow Systems and High-Speed Tests of a Ram-Jet System

Description: Report discussing an analysis has been made by the NACA of the effects of heat and compressibility in the flow through the internal systems of aircraft along with equations and charts are developed whereby the flow characteristics at key stations in a typical internal system may be readily obtained.
Date: July 21, 1942
Creator: Becker, John V. & Baals, Donald D.
Item Type: Refine your search to only Report
open access

Livens projector MI.

Description: "This manual is intended for the using services. It gives all necessary information about the construction, function, and identification of all standard materiel pertaining to the Livens projector MI assembly, with directions for shipping and storage."
Date: August 21, 1942
Creator: United States. War Department.
Item Type: Refine your search to only Book

Newsmap. Monday, September 21, 1942 : week of September 11 to September 18

Description: Front: Text describes action on various war fronts: Russia, Madagascar, Solomon Islands, New Guinea, Aleutians, Far Eastern waters, Midway, China, West Coast, Western Europe, Mediterranean. Large map is keyed to text and illustrates time zones around the world. Inset maps show: Madagascar; Russian front (southern sectors), Madagascar in Africa Includes photographs: Night falls in North Africa; Stinger [twin machine-gun]; It was "impossible" [Capt. Edward Ellsberg's sub salvage work]; Blimps … more
Date: September 21, 1942
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

Newsmap. Monday, December 21, 1942 : week of December 11 to December 18

Description: Front: Text describes action on various war fronts: Libya; Tunisia; New Guinea; Solomons; China; Russia; Aleutians Large world map is keyed to text and illustrates time zones around the world. Includes inset maps: New Guinea; Mediterranean Sea; Russian front. Photographs: Supply dock; wrecked by recoil; Captured Italian flag; Hot on Rommel's heels; Yanks advance on Japs in New Guinea Back: Text describes the history and power of infantry. Includes 19 photographs and a map of Stalingrad… more
Date: December 21, 1942
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster
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Chemical Research -- U233 Production and Extraction; Report for the Month Ending June 21, 1943

Description: Abstract. The precipitation of Pa233 with MnO2 from a solution of thorium nitrate has been studied in some detail and seems quite satisfactory up to 36 gm Th(HO3)4 4H2O per 100 cc solution. The concentration of Pa233 with respect to the manganese dioxide carrier and the thorium precipitated with the carrier appears to be accomplished quite well by either a series of MnO2 cycles or thorium iodate cycles. Volatility methods for both the separation of Pa233 from the original thorium and for its … more
Date: June 21, 1943
Creator: Franck, J.
Item Type: Refine your search to only Report
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