DOCSLIB.ORG

Aircraft Propellers

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Aircraft Propellers U.S. WORKS PROGRESS ADMINISTRATION BIBLIOGRAPHY OF A E R 0 N A U T I C S Part 27 - Aircraft Propellers Compiled from the INDEX OF AERONAUTICS of the INSTITUTE OF THE AERONAUTICAL SCIENCES 30 Rockefeller Plaza New York City The Index and Bibliographies have been prepared by workers under the supervision of the U.S. WORKS PROGRESS ADMINISTRATION Cecil A. Ross Senior Project Supervisor Project 465-97-S-S1 (Formerly 165-97-6055) 19 3 7 FOREWORD This bibliography is one of a series which aims to cover a large part of aeronautical literature. It is pub­ lished by the U. S. Works Progress Administration Project 465-97-3-21 (formerly 165-97-6055) under the sponsorship of the New York City Department of Docks with the cooperation of the Institute of the Aeronautical Sciences. Request for Additions The Institute of the Aeronautical Sciences which is directing the U. S. Works Progress Administration staff of workers will appreciate receiving additional references, corrections and criticism, so that the bibliographies will be.more helpful when issued in final form. Request for Copies The bibliographies have been prepared with funds allotted by the U. S. Works Progress Administration. They may not be sold. Persons and organizations wishing to procure copies may apply for them by letter, stating the use for which they are needed. When it is possible to prepare additional copies such requests will receive first consideration. Robert R. Dexter Aeronautical Engineer Address all correspondence to: John R. Palmer Managing Project Supervisor U- S. Works Progress Administration 5111 R.C.A. Building New York City A.R.C. R. Sc M. - Great Britain. Aeronautical research committee. Reports and memoranda. A.S.M.E. - American society of mechanical engineers, New York. Atti Assoc. ital. aerotecn. - Atti dell'Associazione italiana di aerotécnica. Roma. C.I.N.A. - Commission internationale de navigation aérienne, Geneve. C. R. Acad. sei. - Comptes rendus hebdomadaires des séances de l'Académie des sciences, Paris. D.V.L. - Deutsche Versuchsanstalt für luftfahrt, Berlin. F.A.I. - Fédération aéronautique internationale, Paris. H.H. Stat. off, - His Majesty's Stationery office, London. N.A.A. - National aeronautic association, Washington. N.A.C.A. - National advisory committee for aeronautics, Washington. N.P.L. - National physical laboratory, Teddington, England. Pub. scient, tech. Min. de l'air. - Publications scienti­ fiques et techniques du Ministère de l'air. Service des recherches de l'aéronautique, Paris. R.A.F. - Royal air force (Great Britain) H.A.S. - Royal aeronautical society (Great Britain) Rend. Instituto sper. aer. - Rendiconto dell1Istituto sperimentale aeronáutico, Roma. S.A.E. - Society of automotive engineers. New York. U.S. Govt, print, off. - U.S. Government printing office, Washington. V.D.I. - Verein deutscher Ingenieure, Berlin, W.G.L. - Wissenschaftliche gesellschaft für luftfahrt, Berlin. Z.A.M.M. - Zeitschrift für angewandte mathematik und mechanik, Berlin. Z.F.M. - Zeitschrift für flugtechnik und motorluftschiffahrt, München. TABLE OF^CQNTEHTS Part I BOOKS AND PAMPHLETS ON AIRCRAFT PROPELLERS...1 Part II PERIODICAL ARTICLES, BOOKS, PAMPHLETS, ETC., ON AIRCRAFT PROPELLERS, CLASSIFIED BY SUBJECT. Acoustics 27 Adjustable 28 Airship 29 Automatic 31 Balancing 34 Blades 35 Braking 37 Calculation 37 Controllable 42 De-icing 53 Design 53 Efficiency 60 Free Wheeling 64 Geared 64 High Speed 65 Hubs 68 Interference 69 Maintenance 71 Manufacturing 72 Metal 77 Multi-bladed 82 Plastic 83 Pusher 84 Research and Theory 85 Slip-Stream 98 Slotted 101 Stresses 101 Tandem 105 Testing 106 Thrust 119 Vibration 122 Wooden 125 General 127 AUTHOR INDEX 151 PART I BOOKS AND PiJ^PBLETS ON AIRCRAFT PROPELLERS Design trends in french aircraft engines and propellers, by H. L, Brownback. S.A.E. preprint for meeting, Mar. 11-12, 1937, 10 p. illus. Experimental apparatus for study of propellers, by H. Panetti, Washington, 1937. 10 p. (N.A.C.A. Technical memorandums no. 819) Source of propeller noise, by W. Ernsthausen. Washington, 1937. 10 p. (N.A.C.A. Technical memorandums no. 825) Theories and graphical solutions in designing screw propellers, by 0. Miyagi. Sendai, Japan, Tohoku imperial university, 1937. 12 p. (Technology reports no. 2) Analysis of the three lowest bending frequencies of a rotating propeller, by Fritz Liebers. Washington, 1936, 16 p. diagrs- (N.A.C.A. Technical memorandums no. 733) From Luftfahrtforschung, Aug, 31, 1935) On the relation between the performance and the loudness of sound of an airscrew, by S, Kawada, Y. Obata and U, Yosida, Tokyo, Tokyo imperial university, 1936, 25 p. diagrs., illus. (Aeronautical research institae report no 141) The Resonance method of determination of the natural fre­ quency of airscrew baides, by P. Riz Moscow, Central aero-hydrod^namical institute, 1936. (Report no. 242) Tables for use in an improved method of airscrew strip theory calculation, by C.N.H- Lock and D. Yeatman. London, H. M- Stationery off,, 1936, (A.R,C. R. & M, no. 1694) Tests of a wing-nacelle propeller combination at several pitch settings up to 42°, by Ray Windier. Washington, U.S. Govt, print., off., 8 p, (N.A.C.A. Reports no. 564) Cycloidal propulsion in air. Part I. Cycloidal propulsion theory. Part li. Cycloidal propeller development at the University of Washington, by Frederick Kurt Kirsten* Seattle, University of Washington, 1935. 87 p. diagrs,, illus., tables. (Engineering experi­ ment station series, bulletin no. 79) 2 Handbook for the care and maintenance of the De Haviland controllable pitch airscrew- Hatfield, England, De Haviland aricraft company, 1935. Noise from propellers„ Measurements in free air, by E. Z. Stowell and A. F, Deming Washington, U, S. Govt, print, off., 1935» 9 p. bibliog., illus. (N.A.C.A. Report no. 526) Propeller vibrations and the effect of the centrifugal force, by Theodore Theodorsen. Washington, 1935. 13 p. illus. (N.A.C.A. Technical notes no. 516) Theory of the air screw, by N. Poliahoff. Moscow, Central aero-hydrodynamical institute, 1935. 32 p. illus. (Transactions no. 134) Airworthiness requirements for engines and propellers. Washington, U.S. Govt, print- off., 1934. illus., tables. (Aeronautics bulletin no. 7-G) Controllable pitch propeller investigation, by B. L. Minuchin. Moscow, Central aero-hydrodynamical institute, 1934. 41 p. illus. (Transactions no. 195) Investigation of airscrew series CDB-2, by I. Kouzmin. Moscow, Central aero-hydrodynamical institute, 1934. 16 p. diagrs. (Transactions no. 177) An Investigation of the work of an airscrew with pitch vari­ able in flight, by D. V, Chalezow Moscow, Central aero- hydrodynamical institute, 1934, 28 p. illus. Trans­ actions no. 174) A Method of calculating the performance of controllable propellers with sample computations, by Edwin Phelps Hartman. Washington, 1934. 24 p. (N.A.C.A. Technical notes no. 484) On the electrical method of measuring small vibrations, and its application to the measurement of vibrations of air­ screw blades, by Y. Obata, S. Morita and U. Yoshida. Tokyo, Tokyo imperial university, 1934. (Aeronautical research institute report no, 103) Propeller calculation. Strip theory, by N. H. Lock and D. Yeatman. London, H, M, Stat, off., 1934. 41 p. illus. (A.R.C. R. & M. no. 1674) Tables for use in an improved method of airscrew strip theory calculation, by C N.- H, Lock and D„ Yeatman. London, H. M. Stat, off., 1934. 41 p, illus. (A,R.C. R. & M. no. 1674) Tests of nacelle-propeller combinations in various positions with reference to wings. Part IV. Thick wing, various radial-engine cowlings, tandem propellers, by James G. McRugh. Washington, 13. S,. Govt, print, off., 41^. 3àtL%"ï'& • , i\\\xs *, tables , ^.k.CL, ^etiort no. bOb") Tests of nacelle-propeller combinations in various positions with reference to wings. Part V. Clark Y biplane cellule, N.A.C.A. cowled nacelle, tractor propeller, by Floyd Valentine. Washington, U. S. Govt, print- off., 1934. 15 p. diagrs., illus., tables. (N.A.C.A. Report no. 506) Tests of nacelle-propeller combinations in various positions with reference to wings. Part VI. Wings and nacelles with pusher propeller, by Donald H. Wood and Carlton Bioletti. Washington, U.S. Govt, print, off., 1934. 31 p. diagrs., illus. (N.A.C.A. Report no. 507) Working charts for the determination of propeller thrust at various air speeds, by Edwin Phelps Hartman. Washington, U.S. Govt, print, off,, 1934. 21 p. diagrs., illus., tables. (N.A.C.A. Report no. 481) The H.A.C.A. high-speed wind tunnel and tests of six propeller sections, by John Stack. Washington, U.S. Govt, print, off., 1933. 24 p. diagrs., tables. (N.A.C.A. Report no. 463. Negative thrust and torque characteristics of an adjustable- pitch metal propeller, by Edwin Phelps Hartman. Washing­ ton, ü. S. Govt, print- off., 1933. 13 p. diagrs., illus., tables. (N.A.C.A. Report no. 464) The Problem of the propeller in yav/ with special reference to airplane stability, by Franz Misztal. Washington, 1933. 33 p. diagrs., illus. (N.A.C.A. Technical memorandums no. 696) Tests of nacelle-propeller combinations in various positions with reference to wings, by Donald H. Wood. U.S. Govt, print-, 1933. 40 p. diagrs., illus., tables. (N.A.C.A. Report no. 462) Airscrew design by vortex theory, by G. I. Kouzmin. Moscow, Central aero-hydrodynamical institute, 1932. 63 p. diagrs. (Transactions no. 132) Determination of stresses and deformations of aircraft propel­ lers, by Friedrich Seewald. Washington, 1932. 24 p. diagrs,, illus. (N.A.C.A. Technical memorandums no. 670) Effect of profile shape and blade thickness on airscrew characteristic, by G. I. Kouzmin and D. V. Chalexow. Moscow, Central aero-hydrodynamical institute, 1932. 24 p. diagrs., illus., tables. (Transactions no. 129) The Effect of. propellers and nacelles on the landing speeds of tractor monoplanes, by Ray Windier.
Load more

Recommended publications
  • The Flying Octopus--October 1990
    The Flying Octopus--October 1990 http://www.afa.org/magazine/1990/1090octopus.html October 1990, Vol. 73, No. 10 Sikorsky's was the first practical helicopter, but a different Russian and a younger Air Service got a chopper off the ground in 1922 The Flying Octopus By C. V. Glines MOST aviation historians agree that Igor I. Sikorsky deserves credit for designing, building, and flying the first practical helicopter. His XR-4, the first rotary-winged aircraft accepted by the Air Force, weighed 1,900 pounds and could lift 500 pounds of payload. It first flew in January 1942 and was demonstrated to Gen. Henry H. "Hap" Arnold the next July. General Arnold liked what he saw. "The Army Air Force," said he, "has taken flyers before with not so much gain promised." One "flyer" to which General Arnold may have been referring was an earlier helicopter venture. Sikorsky's helicopter was not the first bought by the organization that would eventually become the United States Air Force. World War I had stimulated many to explore the possibility of true vertical flight. None had solved the riddle of stability, but the potential of vertical lift machines for military purposes continued to interest many. Among these were a few officers of the Army Air Service who had become intrigued with the writings of a Russian with a French name: Dr. George de Bothezat. De Bothezat, a scientist who had fled the Bolshevik Revolution, was a big, bearded man with a quick wit and a violent temper. He was also an extreme egotist who once boasted publicly, "I am the world's greatest mathematician and scientist." In Russia, de Bothezat had gained international renown for his theories about vertical flight.
    [Show full text]
  • IT Legacy Article Compendium
    An IT Legacy Booklet March 2016 IT Legacy Article Compendium 1 INTRODUCTION – LOWELL A. BENSON, EDITOR Write a Book? How about an autobiography? Shortly after the Information Technology (IT) Legacy Committee was formed, Dick Lundgren began to write Legacy articles for the VIP Club newsletter. During the committee’s decade of volunteering, several other committee members have also written Legacy associated newsletter items. This booklet1 is a collection of those VIP Club newsletter articles. The first several articles are the history of the Legacy Committee as we felt our way through the quagmire of gathering documents and hardware artifacts and then cataloging them. So, to some degree, this is both a book and the IT Legacy Committee’s autobiography. This book complements our December 2015 ‘Article for the Month’. That too was a booklet: Measuring Success = Volunteer Hours; recapping a decade with summaries of over 100 on-line IT Legacy articles. I dedicate this document to James 'Rapp' Rapinac who passed away 23 January 2016. Rapp was a steadfast supporter of our legacy initiatives and a good friend. LABenson If you are using Adobe reader; clicking on any section in the table of contents will get you there. 2 TABLE OF CONTENTS 1 Introduction – Lowell A. Benson, editor ......................................................................................... 1 3 2006, First Year Articles ................................................................................................................. 8 3.1 March 2006 – Richard Lundgren ...........................................................................................
    [Show full text]
  • Monthly Catalogue, United States Public Documents, July 1920
    I " ■Pp :: Monthly Catalogue United States Public Documents No. 307 July, 1920 ISSUED BY THE SUPERINTENDENT OF DOCUMENTS .. 1920 Abbreviations Appendix ---------------------------- __________ app. Page, pages--------------------- ---------------------- P-~ Congress------------------------------_________Cong. Part, parts-------------------------------------pt., pts.. Department________________ _________ Dept. Plate, plates------------------------------------------PL Document------ ---------------------__________ doc. Portrait, portraits___________________ por. Facsimile, facsimiles------------_______ facsim. Quarto__________________________ _______ 4°- Folio_______________________ _____________fo House______________________ ____________ H. House bill------ -------------------- _________H. R. Section, sections----------------------------------sec. House concurrent resolution. _ H. Con. Res. Senate, Senate bill--------------------- .----------- 8- House document----------------- _______ H. doc. Senate concurrent resolution S. Con. Res. House executive document—____ H. ex. doc. Senate document---------------------------- S. doc. House joint resolution--------- ____ H. J. Res. Senate executive document--------- S. ex. doc. House report---------------------- ________ H. rp. Senate joint resolution---------------- S. J. Res. House resolution (simple) —_______ H. Res. Senate report----------------------------------- S. rp. Illustration, illustrations----____________ 11. Senate resolution (simple)-------------- S. Res. Inch, inches ------------------------____________In.
    [Show full text]
  • Autumn Offerings
    Autumn Offerings • Air-to-Air Helicopters • Joint Operations Perspectives • Autogyros and Doctrine Secretary of the Air Force Edward C. Aldridge, Jr. Air Force Chief of Staff Gen Larry D. Welch Commander, Air University Lt Gen Ralph E. Havens Commander, Center for Aerospace Doctrine, Research, and Education Col Sidney J. Wise Editor Col Keith W. Geiger Associate Editor Maj Michael A. Kirtland Professional Staff Hugh Richardson. Contributing Editor Marvin W. Bassett, Contributing Editor John A. Westcott, Art Director and Production Manager Steven C. Garst, Art Editor and Illustrator The Airpower Journal, published quarterly, is the professional journal of the United States Air Force. It is designed to serve as an open forum for presenting and stimulating innovative thinking on m ilitary doctrine, strategy, tactics, force struc- ture, readiness, and other national defense mat- ters. The views and opinions expressed or implied in the Journal are those of the authors and should not be construed as carrying the official sanction of the Department of Defense, the Air Force, Air University, or other agencies or departments of the US government. Articles in this edition may be reproduced in whole or in part without permis- sion. If reproduced, the Airpower Journal re- quests a courtesy line. JOURNAL FALL 1988, Vol. II, No. 3 AFRP 50-2 Editorial Mayday! Mayday! Mayday! 2 Joint Operations: The W orld Looks Different From 10,000 Feet Col Dennis M. Drew, USAF 4 A Question of Doctrine Maj Richard D. Newton, USAF 17 The Operator-Logistician Disconnect Col Gene S. Bartlow, USAF 23 Of Autogyros and Dinosaurs Lt Col L.
    [Show full text]
  • Science and the Instrument-Maker
    r f ^ Science and the Instrument-maker MICHELSON, SPERRY, AND THE SPEED OF LIGHT Thomas Parke Hughes SMITHSONIAN STUDIES IN HISTORY AND TECHNOLOGY • NUMBER 37 Science and the Instrument-maker MICHELSON, SPERRY, AND THE SPEED OF LIGHT Thomas Parke Hughes Qmit/isoDian Ij;i^titution 'PJ^SS City of Washington 1976 ABSTRACT Hughes, Thomas Parke. Science and the Instrument-maker: Michelson, Sperry, and the Speed of Light. Smithsonian Studies in History and Technology, number 37, 18 pages, 9 figures, 2 tables, 1976.-This essay focuses on the cooperative efforts between A. A. Michelson, physicist, and Elmer Ambrose Sperry, inventor, to produce the instr.umentation for the determination of the speed of light. At the conclusion of experiments made in 1926, Michelson assigned the Sperry in­ struments the highest marks for accuracy. The value of the speed of light accepted by many today (299,792.5 km/sec) varies only 2.5 km/sec from that obtained using the Sperry octagonal steel mirror. The main problems of producing the instrumentation, human error in the communication of ideas to effect that in­ strumentation, a brief description of the experiments to determine the speed of light, and the analysis and evaluation of the results are discussed. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution's report, Smithsonian Year. Si PRESS NUMBER 6I41. COVER: A. A. Michelson and Elmer Ambrose Sperry. Library of Congress Cataloging in Publication Data Hughes, Thomas Parke. Science and the instrument-maker. (Smithsonian studies in histoi7 and technology ; no. 37) Supt.
    [Show full text]
  • Replace with Your Title
    Advancing Vertical Flight: A Historical Perspective on AHS International and its Times M.E. Rhett Flater L. Kim Smith AHS Executive Director (1991-2011) AHS Deputy Director (1993-2011) M. E. Rhett Flater & Associates M.E. Rhett Flater & Associates Pine Knoll Shores, NC Pine Knoll Shores, NC ABSTRACT1 This paper describes AHS’s vital role in the development of the rotorcraft industry, with particular emphasis on events since 1990. It includes first-hand accounts of the formation of the Society, how it matured and evolved, and the particular influences that compelled change. It describes key events which occurred during various stages of the Society’s growth, including the formation of its technical committees, the evolution of the AHS Annual Forum and technical specialists’ meetings, and the creation and evolution of the Society’s publications. Featured prominently are accounts of AHS’s role in pursuing a combined government, industry and academia approach to rotorcraft science and technology. Also featured is the creation in 1965 of the Army-NASA Agreement for Joint Participation in Aeronautics Technology, the establishment of the U.S. Army Rotorcraft Centers of Excellence, the National Rotorcraft Technology Center (NRTC), the inauguration of the Congressional Rotorcraft Caucus and its support for the U.S. defense industrial base for rotorcraft, the battle for the survival of NASA aeronautics and critical NASA subsonic ground test facilities, and the launching of the International Helicopter Safety Team (IHST). First Annual AHS Banquet, October 7, 1944. 1Presented at the AHS 72nd Annual Forum, West Palm Beach, Florida, USA, May 17-19, 2016. Copyright © 2016 by the American Helicopter Society International, Inc.
    [Show full text]
  • Up from Kitty Hawk Chronology
    airforcemag.com Up From Kitty Hawk Chronology AIR FORCE Magazine's Aerospace Chronology Up From Kitty Hawk PART ONE PART TWO 1903-1979 1980-present 1 airforcemag.com Up From Kitty Hawk Chronology Up From Kitty Hawk 1903-1919 Wright brothers at Kill Devil Hill, N.C., 1903. Articles noted throughout the chronology provide additional historical information. They are hyperlinked to Air Force Magazine's online archive. 1903 March 23, 1903. First Wright brothers’ airplane patent, based on their 1902 glider, is filed in America. Aug. 8, 1903. The Langley gasoline engine model airplane is successfully launched from a catapult on a houseboat. Dec. 8, 1903. Second and last trial of the Langley airplane, piloted by Charles M. Manly, is wrecked in launching from a houseboat on the Potomac River in Washington, D.C. Dec. 17, 1903. At Kill Devil Hill near Kitty Hawk, N.C., Orville Wright flies for about 12 seconds over a distance of 120 feet, achieving the world’s first manned, powered, sustained, and controlled flight in a heavier-than-air machine. The Wright brothers made four flights that day. On the last, Wilbur Wright flew for 59 seconds over a distance of 852 feet. (Three days earlier, Wilbur Wright had attempted the first powered flight, managing to cover 105 feet in 3.5 seconds, but he could not sustain or control the flight and crashed.) Dawn at Kill Devil Jewel of the Air 1905 Jan. 18, 1905. The Wright brothers open negotiations with the US government to build an airplane for the Army, but nothing comes of this first meeting.
    [Show full text]
  • Elmer Ambrose Sperry Papers 1893
    Elmer Ambrose Sperry papers 1893 This finding aid was produced using ArchivesSpace on September 14, 2021. Description is written in: English. Describing Archives: A Content Standard Manuscripts and Archives PO Box 3630 Wilmington, Delaware 19807 [email protected] URL: http://www.hagley.org/library Elmer Ambrose Sperry papers 1893 Table of Contents Summary Information .................................................................................................................................... 3 Biographical Note .......................................................................................................................................... 3 Scope and Content ......................................................................................................................................... 4 Administrative Information ............................................................................................................................ 7 Related Materials ........................................................................................................................................... 7 Controlled Access Headings .......................................................................................................................... 8 Collection Inventory ....................................................................................................................................... 8 Personal .......................................................................................................................................................
    [Show full text]
  • Massachusetts Institute of Technology Bulletin
    PRES IDENT'S REPO RT ISSUE Volume ninety, Number two a November, 1954 MASSACHUSETTS INSTITUTE OF TECHNOLOGY BULLETIN _ _I ___ I __ ~~~ Entered July 3, 1933, at the Post Ofice, Boston, Massachusetts, as second-class matter, under Act of Congress of August 24, 1912 Published by the MASSACHUSETTS INSTITUTE OF TECHNOLOGY, Cambridge Station, Boston, Massachusetts, in March, June, July, October and November. Issucs of the Bulletin include the REPORTS OF THE PRESIDENT and OF THE TREASURER, the SUMMER SESSION CATALOGUE, the GENERAL CATALOGUE, and THIS IS M. I. T. Published under the auspices of the M. I. T. Ofice of Publications __ Massachusetts Institute of Technology Bulletin PRESIDENT'S REPORT ISSUE Volume 90, Number 2 . November, 1954 _~1·_1__1_·_1 1--~111.1~^~-·~-····IIY·i The Corporation, 1954-1955 President: JAMES R. KILLIAN, JR. Vice-President and Provost: JULIUS A. STRATTON Vice-President and Treasurer:JosEPH J. SNYDER Vice-President for Industrial and Government Relations: EDWARD L. COCHRANE Secretary: WALTER HUMPHREYS LIFE MEMBERS WALTER HUMPHREYS RALPH E. FLANDERS DUNCAN R. LINSLEY JOHN R. MACOMBER JAMES M. BARKER THOMAS D. CABOT ALFRED L. LooMIS THOMAS C. DESMOND CRAWFORD H. GREENEWAL r HARLOW SHAPLEY J. WILLARD HAYDEN JAMES McGowAN, JR. ALFRED P. SLOAN, JR. MARSHALL B. DALTON HAROLD B. RICHMOND REDFIELD PROCTOR ROBERT E. WILSON LLOYD D. BRACE GODPREY L. CABOT DONALD F. CARPENTER THOMAS D'A. BROPHY BRADLEY DEWEY HORACE S. FORD WILLIAM A. COOLIDGE FRANCIS J. CHESTERMAN GEORGE A. SLOAN MERVIN J. KELLY VANNEVAR BUSH WALTER J. BEADLE ROBERT T. HASLAM WILLIAM EMERSON B. EDWIN HUTCHINSON RALPH LOWELL IRVING W.
    [Show full text]
  • Un Pionier Al Inventicii Românești–George De Bothezat
    CZU 929:629.73 U – G B. R (3)* | EC. ING. BOGDAN BORESCHIEVICI (Continuare din Intellectus nr. 1 și 2, 2018) Un gând special de recunoștinţă dlui dr. ing. Vasile BUIU, fără de susţinerea căruia acest articol nu apărea Încheiem prin acest capitol (Epilog) prezentarea da- telor biografi ce ale lui Gheorghe Botezatu, inventa- tor de origine basarabeană, cel care a inventat unul dintre primele elicoptere din lume. EPILOG În 1951, la 2 Octombrie, George de Bothezat va pri- mi, postum, brevetul de inventie 2.569.882.- ”CON- TROL AND SUPPORT CONNECTION FOR `HELICOP- TER ROTOR SYSTEMS” kpuGpz{vyphGpu}luŨppsvyaGklGshGpkllGˀGshGptwsltlu{hyl myvtG{olGopz{vyGvmGpu}lu{pvuzaGmyvtGpklhGˀG{vGptwsltlu{h{pvu * În prima parte a articolului (Intellectus nr. 1/2018) și în cea de a doua (Intellectus 2/2018), autorul ne prezintă prodigioasa activitate știinţifi că și inventivă a lui George de Botezat. Partea a treia cuprinde anexele ce documentează multirateral rea- lizările marelui inventator. 106 | pu{lsslj{|zG[VYWX_ Inventatorul este GEORGE DE BOTHEZAT – decedat; executorii testamentari sunt WATSON WASHBURN coexecutor New York; JULIA R(AMSAYHILTON) DE BOTHEZAT coexecutrix, Lar- chmont, New York, assignors to Elicopter Corpora- tion of America, Flushing, N.Y., a corporation of New York. Application June 29, 1946, Serial Mo. 680384. ------------------------------------------------------------------- ANEXA 1 Lista documentelor disponibile neincluse în articol 1. Listă brevete: Ţara și nr.brevet Titlul Data depunerii GB191211493A Aeroplane having Automatic
    [Show full text]
  • Article, the Extravagantly Named German Scien- at Different Constant Velocities
    PaRT I: gyRoScoPES aNd aLBERT EINSTEIN FRoM ThE IoN hISToRIaN, MaRvIN May Elmer A. Sperry and the Gyrocompass His company became Unisys, the giant computer and informa- tion technology company, and his gyroscope-guided autopilot became known as “metal Mike,” the mechanical helmsman. lmer Ambrose Sperry was born a year accepted at that time. Although unable to Ebefore the Civil War began, but the gyro- demonstrate an actual north-pointing gyro- compasses, inertial navigators and voyage compass using his string-propelled gyroscope managements systems that stem from his (electric motors being unavailable at the innovations still steer our ships and aircraft. time), Foucault did establish the theoretical Indeed, few pioneers of navigation have left basis for the gyrocompass. as enduring a legacy. By the late 19th century, iron ships had In 1880, the 20-year-old New Yorker largely replaced wooden ships, jeopardizing Elmer Sperry at age 27 formed his first company. By 1986, Sperry the integrity of the magnetic compass, which Corporation, a merger of all eight companies for 400 years had been the navigator’s most compass was an ingenious notion, several he founded to manufacture and market his reliable course indicator. problems presented themselves to Sperry and many inventions, had become Unisys, the The age of electrification began around others who were working on the same idea. giant information technology firm. the same time, when scientists such as Max- A 1912 publication of U.S. Naval Proceedings The brilliant inventor, engineer, and well, Faraday, Helmholz, Einstein, Steinmetz, outlines these challenges: entrepreneur held 135 patents and became and Edison advanced the theoretical and 1.
    [Show full text]
  • A Quadrotor Sensor Platform
    A Quadrotor Sensor Platform A dissertation presented to the faculty of the Russ College of Engineering and Technology of Ohio University In partial fulfillment of the requirements for the degree Doctor of Philosophy Michael J. Stepaniak November 2008 2 The views expressed in this dissertation are those of the author and do not reflect the official policy or position of the United States Air Force, the Department of Defense, or the United States Government. 3 This dissertation titled A Quadrotor Sensor Platform by MICHAEL J. STEPANIAK has been approved for the School of Electrical Engineering and Computer Science and the Russ College of Engineering and Technology by Frank van Graas Fritz J. and Dolores H. Russ Professor of Electrical Engineering Maarten Uijt de Haag Associate Professor of Electrical Engineering and Computer Science Dennis Irwin Dean, Russ College of Engineering and Technology 4 Abstract STEPANIAK, MICHAEL J., Ph.D., November 2008, Electrical Engineering A Quadrotor Sensor Platform (124 pp.) Directors of Dissertation: Frank van Graas and Maarten Uijt de Haag A quadrotor sensor platform capable of lifting a ten pound payload is presented. Platform stabilization is accomplished using classical control methodology and is implemented on a field programmable gate array. The flight control system relies on attitude information derived using a technique that circumvents the electromagnetic susceptibility of the inertial unit while minimizing the propagation of errors. This dissertation develops models for the high-power brushless motors. In particular, the rotational losses as a function of motor speed and the operational characteristics of the electronic speed controller are considered. Furthermore, losses within the batteries are found to dominate the power budget at planned operating speeds.
    [Show full text]