Aeronautics Nationaladvisorycommittee
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— .- . AERONAUTICS — SIXTEENTH ANNUAL REPORT —. OF THE NATIONALADVISORYCOMMITTEE FOR AERONAUTICS 1930 INCLUDING TECHNICAL REPORTS NOS. 337 to 364 ● UNITED STATES ~~ PRINTING OFFICE WASHINGTON: 19M ForsalebytheSuperktendenlof Docamenti,WmhingtoUD. C. - - . - PrfceS3.00Buckrem LETTER OF SUBMITTAL To the Congrem of the United States: In cm Jiance with the provisions of the act of March 3, 1915, establishing the National Advisory Com- mittee for 1 eronautk. I submit herewith the sisteenth annual report of the committee for ,the fiscal year ended “June 30, 1930. ‘ Attention is invkl h the o ening portion of the committee’s report dea@ with the aeronautical situation generally, and also to Pmt V o/’ the report present~q a summary of progress m the technical development of aircraft. It is gratifying to note therein, md in Chaummn beds letter of transmit+) the committee’s tiews as to the factors that have contributed to and assure the further pro ess of aeronauts. I concur with the committee’s recommendations at the end of tT e report regmding the f~thm develop- .__ ment of aircraft and the need for continued prosecution of scientific research in aeronautics. -- HERBERTHOOVER. ‘– THE WHITE HOUSE, December .4, 1%?0. m ———- LETTER OF TIWWMITTAL NATIONALADVTSORYCOMMITTEEFOBAERONAUTICS, Washington, D. C., Norember 18, 1$30. -- MR. PRESIDENT: h compliance with the provisions of the act of Congres approved March 3,1915 (U. S. C., .- title 50, sec. 153), I have t-hehonor to transmit herewith the Sixteenth Annual Report of the National Advisory - Committee for Aeronautics for the fiscal year ended June 30, 1930. The year 1930 has been one of gratifying progress in scientific knowledge referring to aviation, in the tech- nical dem40pment of aircraft, and in the extension of the use of aircraft in the United States. The policies of -— the Federal Government in supporting the study of the fundamental problerns relating to the technical develop- ._ ment of aircraft, and in providing airways and air na-+rition facilities, ha~e been most important factors in the year% pmgrm. The encouragement provided by the Watres Act for the carrying of air mafl and the transportation of passen- gers will enable air transportation companies to gm experience with the factors which will ultimately place air transportation on a sound economic basis. The important problems requiring solution are the improvement of —— aircraft and aircraft-engine design, resulting in more eoonomical operation, and the development of improved .- facilities which w-illaid in the safety and reliability of aircraft operation. The committee believes that, with the completion of the fulkcale wind tunnel and the seapkne towing channel at its laboratories at Langley Field, Vs., it will be in a position to undertake more effectively the solution of those scientific problems which affect the _= safety and economy of aircraft. The committee beIieves that the present policies of the Federal Government relating to the development of aeronautics in all its branches are sound and constructive, and that in the fum support of these policies lies the .— . best assurance of the continued advancement and leadersKlp of Anerican aeronautics. Respectfully submitted. .- ~OSEPES. AMES, Chairman. THE PRESIDENT, The White Eouw, W’aahington,D. C. v . CONTENTS —— .. .- “A&:. _ ..__ Letterof submittal------------- —----- ----------- — ------------ ---------- -------.”= ---.-------.- A----------- III Letterof tr~ittal-.-----------_ ---------_ ----- _a_- - ... ------------_ ----------------.--e---- v Sixteenthannualmpofi-------------------------------------- -. - ----------------- 1 ..- PART I, ORGANIZATION Functionsof thecodtbe----. -—---------------------------- .- 4_.__..— . Organizationof thecanmittee-–-_-_--- ---.---- ____ -------- . — _--.--— ---.-- --,-b ----- ------ ----- s- 4z=_”= Meetingsof theentirecommittee--------- -------- :----- -. -+-. ------- --=-- .—.___. G.--.. -..--. ---_—L------- 5 . ..-. ::: Theexecutivecodttie... ----- .----.----- ___. __ —_- —.-. --==--------- ------.---L----------- 6 Submmmitkm--.----___ -----------------_ .---. ---. ----.. -._A-_ —-e.- ------------ , ------------------------------. 6.. __ - z Quartersfor codthe -------------------------- -- ——. —----- ------------- ...-------------- 6 ..,.. .,== The LangleyMemorialAeronautioafLaboratory---_.–__--___----__—_ -- -. ..- -_-__--__-_-_-__------—= ----=- 7 -- ,. —— TheOfficeof AeronauticalIndigence ----------------- —-------- -. -—.- ..-.=---- ---—------- ---------- ------------- & - .--.–— Financialmpoti---. -—----------------------- ------------------- —___ ------------------------- --------- -.. &_—- PART H. GENERAL ACTIVITIES Studyof aircraftaccidents------ ------------------- ---------------- — ----------------------------------- .---_- 10 – ---. — Considerationof aeronauticalin~ntiom-------------------------- - ------- n_ . .. — Relationswiththeaircraftindwtitv----------------------- ---------- ------ ------ ------- ------------------------ B._. — Cooperationof ArmyandNavy----------------ti ------------ — _-_-— —--- —------- ---------- ------ u. Investigationsundertakenfor the Armyandthe Navy------------ --.- ..----.- .13. — CooperationwithStateDepartmentabroad----------------------------- ------ ______ _____ ------- _ -- 14 The DanielGuggenlieirn.Fundfor thePromptionof Aeronautics. ----- ----------------- --_-------------.- 14 CooperationwithBritishAeronauticalResearchComittie ------------------------------------------------- L__ — Exhibitat SevilleInternationalExposition------- ---------------------------------------------------- ------- M. -..--.-— PART III. REPORTS OF TECHNTCAL COMMITTEES Reportof committeeon aerodynamics------------ ------------------ —___ ----------------------- ----------- 17 Reportof committeecmpowerplantsfor akraft. --------------____ -..m-------------------------------- .-27 . _ ._ Reportof committeeon materialsfor aircraft------ ------------------ —. _________ ----- --------------- ~---. - 25.—— Reportof committeeon problemsof airnavigation------------------------------------------------------------- .:.41 PART IV. TECHNICAL PUBLICATIONS OF THE COMMITTEE Summariesof TechnicalRe~rk ---------------------------------- —- . ..-— .—,-.. .=----- _a_--_--_ A---- . ----45 - Listof TechnicalNotesiseucdduringthepastyear ------------------------------- ------------ .63 ..—– -— Listof TechnicalMemorandumsiisuedduringthepaatyam------------------------------ ------------- 64. :_— Lwtof AircraftCirculafi”issuedduringthepastyear---.------— ___ __-_ -Al- _____, . -------- fi~ Bibliographyof Aeronalltim----.---_------____-_---_---__-___-___-.;----- -------------l.----- .- 57 PART V. SUMMARY OF PROGRESS IN AIRCRAFT DEVELOPMENT Aemdynamiw-------------------------------------------------- ——---—.-...—.-----.._ -----_--—. ,-,: .5s—-——._ Airplanestructural--------------------------------------- -—-..— --. -.--- . --—------ 01 ..- –. -— AimMW-------------------------------------------------- __ —--- . ------ . “.. -------- .. --.= -.62 .4ircraftengine------_----- _-______ l_-_ ------; ------------- . .. .. ... .. ...---4. -—” --~63._..— Summary---- _--___ ---___ ---_ --------------_ .---_ ------_-_.e —-..——.–.-.—--.. -. ..-. -.-—-----64 ConclWion---------- _----------------------- .----d ------------- —---.—— ----- .-.---_-b -~..--..--.+. .--a,. !-(M -–.. .-...— VI TECHNICAL REPORTS No. 887. The GaseousExplosiveReactionat ConstantPr~The ReactionOrderand ReactionRste. By F. W. StiveM...----.-._-—___-- -------------------------------------------------- 67 No. 338. TheEffectof ReductionGearingon PropeUer-BodyInterferenceasShownby FullSoale‘i?iid TunneITests. By FredE. Wei&------------------------------------------------------------------------ 83 No. 339. FullScaleWiid TunnelTestswitha Seriesof Propellersof Di.iTerentDiameterson a SingleFuseIage. By Fred .— E. Weick-------------------------------------------------------------------------------- 105 No. 240. FullScaleWindTunnelTestson SeveraIMetaIPropellersHavingDbTerentBladeForms. By FredE. ‘iVeick-- 121 . No. 341. The D~”gn and Developmentof an AutumaticInjectionValvewith an hmdar Oriliceof VaryingArea. By WilliamF. Joaohim,ChesterW. Hicks,andHamptonH. Foti=_----_-----------_ --------_ --.-__ ---——— 135 No. 342. Effectof Turbulencein WindTunnelMeacurements.By H. L. DrydenandA. hf. Kuethe-.-------_-------– 145 No. 343. Effeotof Variationof Chordand Sptmof Herons on RolIingand YawingMomentsat SeveralAnglu of Pitch. By R. H. Heald,D. H. SirOther,andB. H. Motih ------------------------------------------------- 171 — No. 344. The Designof Plywood‘iVebsfor AirplaneWingBeams. By George‘iv. Tmyw---_--—--.--_---—_-—— 201 No. 345. The Designof AirplaneWii Ribs. By J. A. NewYinand GeorgeW. ~aym-----__---_ -__----_ -----_ —----- 219 No. 346. WaterPres.vumDmtriiutionon a FlyingBoatHull. By F. L. ~ompwn ---------------------------------- 273 No. 347.A Methodof CalculatingtheUltimateStrengthof CantinuonsBeams. By J. A. NewIfnand GeorgeW. Trayer- 291 .- No. 348. Strengthof WeldedJointsin TubularMembemfor Aircraft. By H. L. WhiWmoreand W. C. Brueggernan--- - 319 - No. 349. A Proof of th TheoremRegardingthe Distributionof Lift Over the Spanfor MinimumInducedDrqg. By — W. F. Duand----------------------------------------------------------------------------------- 361 No. 350. WorkingChartsfor the Selectionof AIuminumAJloyPropellersof a StandardFormto Operate with Various AircraftEnginesandBodies. By FredE. Wtick------------------------------------------------------ 377 No. 351. FullSoaleWiid