3,240 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "40"  
Results: 1 - 24 next
open access

The S.P.C.A. 40 T Commercial Airplane (French): An All-Metal Cantilever Monoplane

Description: Circular describing the S.P.C.A. 40 T, which is a commercial all-metal cantilever airplane that was guided by the two essential requirements of economy and safety in its design. Details of the design, power, test results, fuel tanks, characteristics, performances, drawings, and photographs are provided.
Date: April 1931
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A complete tank test of the hull of the Sikorsky S-40 flying boat - American Clipper Class

Description: The results of a complete test in the N.A.C.A. tank on a model of the hull of Sikorsky S-40 flying boat ('American Clipper') are reported. The test data are given in tables and curves. From these data non-dimensional coefficients are derived for use in take-off calculations and the take-off time and run for the S-40 are computed. The computed take-off time was obtained by the Sikorsky Aviation Corporation in performance tests of the actual craft.
Date: December 1934
Creator: Dawson, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flight Measurements of the Rudder Control and Sideslip Characteristics of Four Vertical Tail Arrangements on the P-40 Series Airplanes

Description: Report presenting an investigation of rudder trim force change with speed and power, rudder force reversals in sideslips, and rudder positions in sideslips and straight flight of a P-40E airplane. Quantitative measurements of the items were made on three other vertical arrangements.
Date: October 1942
Creator: Johnson, Harold I. & Vensel, Joseph R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Vibration Surveys of the P-40 Rudder and Fin-Rudder Assembly

Description: "The following surveys on the vibration response of the P-40 rudder and fin-rudder assembly were conducted during the fall of 1942 for the purpose of obtaining information on the flutter characteristics of high-speed airplanes of known performance. The tests on the rudder alone were made with the rudder suspended in a floating condition; the tests on the fin-rudder unit were made with the fin rigidly fastened to a concrete base" (p. 1). A variety of figures and diagrams for the assembly are pro… more
Date: April 1943
Creator: Theodorsen, Theodore & Regier, Arthur A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Effects of Propeller Operation on the Distribution of the Load on the Vertical Tail Surface of a Typical Pursuit Airplane

Description: Report discusses the results of testing on the pressure distribution at several longitudinal sections of the vertical tail surface of the Curtiss P-40K airplane at various angles of attack and angles of yaw and with the propeller removed and propeller operating. Results regarding the chordwise pressure distributions, effects of propeller operation on the spanwise distribution of normal-force coefficient, total normal-force coefficients, and effect of propeller operation on the variation of vert… more
Date: March 1944
Creator: Sweberg, Harold H. & Dingeldein, Richard C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of Individual Aileron Hinge Moments and Aileron Control Characteristics of a P-40F Airplane

Description: "Flight measurements have been made of the individual aileron hinge moments, aileron rolling effectiveness pb/2V ,and stick-force characteristics in abrupt aileron rolls with a P-40F airplane (AAF No. 41-14119) over an indicated airspeed range from 108 to 304 miles per hour. Three methods for measuring the rate of change of hinge moment with angle of attack were investigated. Presented for comparison with the flight results are data from two-dimensional wind-tunnel tests of the wing-aileron pro… more
Date: January 29, 1945
Creator: Goranson, R. Fabian
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Flight Measurements on Pressure Distribution During Tail Buffeting

Description: Report presenting pressure-distribution measurements obtained from the horizontal tail surfaces of the Curtiss P-40K airplane during low-speed pull-ups to abrupt stall in which tail buffeting was experienced. The chordwise load distributions during buffeting are similar to those experienced during angle-of-attack changes. The location of the stall and frequency of stall disturbances are also described.
Date: October 1945
Creator: Boshar, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Crystal structure of polonium and its decay products

Description: X-ray diffraction patterns have been obtained from a sample of elemental polonium over a period of more than four half-lives. This time study was made for the purpose of determining the effect of decay upon the lattice constants and crystal structure of the element.
Date: March 1, 1948
Creator: Haring, M. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Density of metallic polonium

Description: Determinations of the density and coefficient of thermal expansions of postum (Polonium 210) were attempted on 20 curies of polonium as obtained from production foils.
Date: May 18, 1948
Creator: Brody, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrodeposition research progress report

Description: This report contains a review of this work conducted by the Electrodeposition Group for the last six months. Pictures and a discussion of the method used to convert production solutions to postum to hydrofluoride acid solutions of postum are given. Attempts to plate postum in an inert atmosphere by remote control have been made. As yet no successful runs have been completed. Standardization of normal calomel electrodes by comparison to silver-silver chloride electrodes and to hydrogen electrode… more
Date: June 1, 1948
Creator: Abel, W.; Bell, R. & Neibel, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gamma scale chemistry progress report

Description: This report considers the work done during the year ending June 30, 1948, present work being done and future plans on the determination of formulas, methods of preparation, and properties of as many compounds of postum as possible. An experimental approach to such a research problem on the element postum requires that procedures which may be used deal with ultramicro quantities of material. Such procedures on an ultramicro or gamma scale require special techniques by personnel trained in manipu… more
Date: June 1, 1948
Creator: Economides, M.; Estabrook, E. & Joy, E.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General chemistry progress report

Description: Decomposition potentials of bismuth solutions of 1.037 and 0.509 grams of the metal per 100 ml. of 1.5 nitric acid were found to be -0.06 and -0.09 volts to N.C.E. These results confirm previous values and indicate that bismuth will not be reduced from production solutions at the potential of the normal calomel electrode. A summary of research in progress, completed, or anticipated is given.
Date: June 1, 1948
Creator: Barth, S.; Ford, M. & Dismore, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron source progress report

Description: This document is a de-classified June 1948 progress report on neutron source development at Monsanto Chemical`s Mound facility. Specific sources reviewed are: (1) Postum-beryllium, (2) Postum-Boron and Postum-Fluoborate, and (3) Postum-Lithium and Postum-Sodium. Preparation of each source is discussed, and some of their physical properties are given.
Date: June 1, 1948
Creator: Bentz, L.; Birden, J. & Hertz, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physics progress report

Description: This document is a de-classified June 1948 Physics Group Progress Report from Monsanto Chemical`s Mound facility. Areas discussed include: (1) neutronics, (2) resistivity of Postum, (3) purity of Postum, (4) vapor pressure of Selenium and Postum, and (5) x-ray laboratory efforts.
Date: June 1, 1948
Creator: Brocklehurst, R. E.; Brooks, L. S. & Davenport, T. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General chemistry progress report

Description: This document is a de-classified July 1948 General Chemistry Progress Report from Monsanto Chemical`s Mound facility. Detailed discussions of numerous studies of Postum compounds are included in this report, and experimental data on various chemical and physical properties of these compounds are given.
Date: July 1, 1948
Creator: Barth, S.; Ford, M. & Dismore, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Process research progress report

Description: This document is a declassified July 1948 Progress Report on Process Research at Monsanto Chemical`s Mound facility. Areas discussed are: (1) treatment of hot solid wastes, and (2) treatment of hot liquid wastes. Chemical aspects of these processes are noted.
Date: July 1, 1948
Creator: Hamilton, P.; Huddleston, F. & Mead, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A new device for filtering hydrofluoric acid and other strong acids. Information report

Description: During the course of a research problem involving hydrofluoric acid it became necessary to filter concentrated hydrofluoric solutions to remove various solid materials. The search for a suitable filter media finally led to the use of a commercially manufactured plastic material known as ``Sponge Teflon`` (polytetrafluoroethylone) which is produced by the DuPont Company. This material, which comes in 1/8 in. sheets, is used primarily as a gasket material in acid lines, and is impervious to all a… more
Date: July 9, 1948
Creator: Bell, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General chemistry progress report

Description: This document is a de-classified August 1948 General Chemistry progress report from Monsanto Chemical`s Mound facility. General chemical properties of Postum compounds are discussed, and experimental data on these properties are presented.
Date: August 1, 1948
Creator: Barth, S.; Ford, M. & Dismore, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of the I-40 Jet-Propulsion Engine in the Cleveland Altitude Wind Tunnel 1: Performance and Windmilling Drag Characteristics

Description: Report presenting the performance characteristics of the I-40 jet-propulsion engine for a range of altitudes and ram pressure ratios. Results regarding component efficiencies, engine performance, generalizing factors, and windmilling drag characteristics are provided.
Date: August 24, 1948
Creator: Gendler, Stanley L. & Koffel, William K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen