Aeronautics National Advisory Committee For

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Aeronautics National Advisory Committee For

AERONAUTICS FOURTH ANNUAL REPORT OF THE NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS 1918 , .,. .-.... ..... ,_. .. $ .,,:..:, .*J:ii 457 . ...= ...... .... WASHINGTON GOVEBNhIFLNTPmNTrNG OFFICE l,zo . coNmm. The National AdvieoryOmnmitteefor AeronauticJY. ...**..*.* ., .*..*.... 9 bmtien@ ti@atim ....... .. L. 10 The executive committee. 10 Subcommitkle ..........- .. .. 10 tictiom oftiemtittie ......... ... 13 ~tionof tientic mdr. wmk........ 14 Actititiee ofthe technical subcomnu"tti ...... ... 14 Aim& dwfgn and .titieetipblem ..... 14 Navigationofaircraft. aeronauticinstruments, md ~fiM ........ .16 Pow&plan@forA ....... ..L . - 16 Standardization and fnveatigationof materiafa for&craft ..... ....... 20 SWlmfitim for@t ............. 20 Free Sight @k ...... 20 R81ationofthe stmoephemto acmxmutice......... 21 Q.mformtittee .............. 23 The r=m’ch laboratory........... .. 24 The wind tunnel ........ 24 omc9 Oftw2_utid hem ............ 24 Themtitie ~ati. Wncyfor &e=ttiement d@uW ......... ....... 26 Aircraftproduction........... 26 ~Ohke~omn r.ch . .. .. .. .. .. .. .. .. .. .. .. .. 25 Mence=d ~titia ....... 26 Airmail Km&e... .... .. 26 (lid aeriel tmmport ..... 27 Electromagneticeyncbronfzerformroneutfcel macbimeguns.... .. .. .. 27 Veneerwingconstruction...... .... ..*...... 27 Airplanemapping camera... .. 27 Aimraftengine fide .......... 27 Evolution ofakcraft engfnea...... 28 Aeronauticalfl.lventiom..... 29 Technfcal?0pOd8............. 20 Generalproblem and activities........ ......... 22 E!emeoutatandfngprob~enmin aeronaudce..... w iL SbbfIity w determined by msthematiml fnvmtfgation..... 44 B. A&peed metersand aeronauticfmtrumenta.... .. 44 c. WmgSectione...... .. .. 44 . D. @51MLI..... ....... ... .. 44 E. ~pdl~ ...... 47, F. Form ofaiqiane ..... .. .. .. 47 G. MO communication......... 47 H. Meteorologyfn relstion to aeronsutice.... 47 Phyrdcalproblems... 48 A. Noncomxdvemateriala.............. 48 B. Flat aud camberedenrkcee........ 48 C. Terminal connections.... .. 48 D. bnetructive materide ... 4s E. &n-tion dbuopt@= for~Wr-ti&@ ... --------------------------------------- 49 F. Nomenclatureforaeronr+uticn....... 49 G. f3peciJIcstfonEforaeronautic nwterhih...... ..- . 49 H. Biblfogmphyof881’O~Uti@. 49 I. OoWction,m- and ieeuanceofreporfa.. ............. .. 49 J. Limitation ofeizeofairplanea..... ...... .. .. 49 Financfrdreport... .. ..

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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.
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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.
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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.
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Autumn Offerings
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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.
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Up from Kitty Hawk Chronology
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Un Pionier Al Inventicii Românești–George De Bothezat
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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.
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Invenţia În Standardele De Evaluare a Performanţei Academice
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Spectroscopic Tools for Quantitative Studies of DNA Structure And
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