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Show l Hmld Loekwood in "Eiadwa BilF Sunday and Monday . Jl h : SPECIAL COMEDY FOR CHILDREN. COME EARLY. HUNDREDS TURNED AWAY THE PAST THREE DAYS. f 1 I til - Ui ' AERODYNAMICS , , THEORETICAL AND APPLIED Tfcll vslone It a practical textbook, -il , tutleolirly coterlna tho dynamic proper- s"! J ties el elutlj fluids, and It contnlni tho ! I frit csosrelieniliB and accurate outline .' ' mr fornulatee". of the laws that uovern in tbusaeoa ol fliiht and which defln "i IM prsllens el flliht structures, the tie- PI ii(o el M:h It thut approached In a "j Isilul Diaatr. .j TstU el Contend l Lht el IlluiU-atlcci J. Pnlitt . TM Alnuphere 1 rjikil tod Chenlcil Constitution I tEXPtierfc Status J Jczihcric Djnanilcs TU Sillies of EIcjIIc Fluids ' C.rrulBlllU tod Expansibility ,'i ' llulk'AT of Gates V Tte Djmnlei ol Elitllo Fluldt i'i rbi c! Ccaflnrf Qua J Ju 'If Air (o tte Miss tile Frltticn ;) iiifitoi on Different Surfaces l-irtion of Air on Atr 1. Cn:n la Accepted Theories and Practise ; H.'i:(ird ef UiJancme Reactions h 71L Surface! and Solndlliis Bodies ; Aelba ted Reaction j, llrtl'Jsn of Mr br Penetration i Ossreisloo of Atr br Siutcctlon ' Hi!iDd Ptrallelozrams of Forcw I IlMcilaa Lms Mcature of Power Netd I. Mma Utrtli. acd Momentum i D;mol: Tranilitlonal Equlllbrlun r ! litxtj Lou In Maintaining Movement ',! Oinslc Height Equilibrium j', Xztra Leu la Maintaining Xleliht j; FLTISO-HACHIRE OESIGRS AND STRUCTUBES ! Tie practical aipeett of aeroplane da- I'is, Iron tie "FLIGHT STRUCTURES If OF NATURE" to the characteristic tea- tint d all successful aeroplane types tr j; tinlo fully treated. Of the utmost Ira- I C:rtiK aod Interest Is the new material ij is "THE POWER REQUIREMENT." itl tsactroloi the rrcblens of the vastly- t Ittrtand flight cfflelcney which It coon cile. i FL'iht Structuns of Nature birds j EitlKt Reptilian Flyers V jlxlai Minraab 1 luetu I ' Hsruwner of Kljln Animals J Eedf Slrwiorej and "Head Resistance" litic.ka Forma Struts end Stan Italics 1 A Wlej Not aa "Inclined Plane" j I fiu!(lloa by ah "Inclined Plane" 1 J.alettlon bj a Whig 1 Necessity for Taper of Wine TlOtk rront and Upturned Reir I HauHitlon cf SustcntlOD. 4 Tti Stilt ol the Center of Pmiure il The Uaitsblf ShUt 1 . The stable Shili .1 Ichtrtnt Stttlllty .1 Kert cf Stsble Prtooro Shift W ETert cf DlbedrU Ancles 1 LSea cf Tandem Surfaces J , tCect of Vertical Plai ' , Oitrcl Stability illDtU , : Astotsstic i Tee Pe.er Hfqolrsmeot i. OUObt Olcblcr ' lri Flliht Jlaasn MutcuUr Eoerrr lier roster Tt sue cf Aeroplanes : i Ur ef tie Buart-i and Cubes j Tee Deilin of Aeroplanu fleseota cf the Mirhtoe u.J. u4 Propulsion Mehrlsli acd Structures i cf Miterlils EotiibUlli of MsterUla j Cespresjlna Memben a TfMloc ilembers tSt'toc Msteriala "Oltd;r Depth" Jij Structcres jytti Structures 1 f?rlot ted Control .flible Caaber MinlpxilsUcM Eequlrcd ! , Kolmtco and Wear ; Billeoni u..n.AERfl-ANE TinM HK.ACTURE. OPERA. TIOH, MAINTENANCE. AND REPAIR .tr P"1 h builds, flies, or r- ; 11? tullsrly adaptad tt be of benefit I r,',,''1? ""Klemi of tuemsful and ' alt .I.i."ul WHfrnanci. to utfMn i uielVa.' r ttt BMl MPtnt neeh-lcct? neeh-lcct? nii Blfd Kr3clenc7 V VlW" (l M''ne ParT, I Tenia i AM?i",B.En,Bfl"i lT,lrr,C?UIo Landing nd Undine Sped 853ES,B,ni,M 1 .rlrt ' , ''! lliWiallen &afean,d "Rulea of tho Roa j Ueo B lnstrmnents and Th i' fluenn!l8U.m.pUon aQd Speed "3 ! CteSS01 lnds and Soaring 1 "RonS 0 atld RePa,r jj turlSg nepfllrlnS t0 Manuff FfcrSri? E3ulpmont :.: PieidS5nand 8ch00s :; SSndEquipmcn : Aeropoa Methods Equipment V' Becai,r Pv'cr fop Fltnht l- volumcl5. specifically i H Read the Classified Ads. Read the Classified Ads. 1 '. , I ulll ! 1 35 ' Read tho Classified Ads. Ira' SYNOPSIS OF COKTENTS . AC7T NOW 1 B ! Chapter and gome of the major subheads of the nix vol- Thl advertisement 7 otrt noon ho royeatoA, eve arabsierlhe aractt arc lliited In the martinis of thin advertisement. A noTr 11 7ou rtnh to avoid prlco Rdvsncefl and delay. Orders nninll older, containing the thousands of heading In the m HI T 11 1 eO 1 9 are comlas; tn M a rate wMch will aoon ezhauat tke edlUo M Se.ntere.nW ltSJr ToHbIoV 1 Q DC fejOiQ D V O LI DbLsi I U UUi 1 pTompeT ' " 1 SSSyaii UtSlKluno. J S cutout, fill in. and mail the coupon today I AN EXHAUSTIVE, AUTHORITATIVE, AND BRAND-NEW SET OF BOOKS ON THE SUBJECT THAT IS DESTINED TO TRANSFORM THE WHOLE STRUCTURE OF CIVILIZATION WlTHIH THE NEXT TEN YEARS (In SIX VOLUMES. 6Jx9 INCHES, TOTALLING 4460 PAGES, AND INCLUDING OVER 4000 ORIGINAL ILLUSTRATIONS) ft By Victor Loucheed .J 'x - f I Author of "Vehicles of the Air" and of "Practical Aeroplane Dcjrnint ) , i " Founder Member of the Society of Antomoblle Engineers, Formejr , ' ' H --" 1- Editor of MOTOBt and flrst ConBultlng Engineer UJ r "r ' ,i ; ; of the Aero Club of Illinois m HJ SCOPE OF THE WORK As suggested by the synopses herewith, the text and illustrative matter of this new work, complete in its plan and unrivalled in its execution, have been prepared for students of flight who require accurate, 1918 information infor-mation on this subject, uncomplicated with errors of omission or commission, commis-sion, and unburdened with useless particularity concerning obsolete or experimental constructions. The facts and data incorporated in these volumes have been largely gathered from abroad, and embody the latest results of Mr. Lougheed's military experience, so that they are as up to date as the most critical requirements of present military and industrial needs can demand. A.3 is well known, Mr. Lougheed is exceptionally equipped for discriminating and practical literary work in this exacting field so little understood, so definitely on the very borders of human knowledge, and involving so complex com-plex a variety of difficult engineering. Commencing with a column on aviation which he conducted while editor of Motor, fifteen years ago, in 1903, he subsequently progressed to the contribution of many articles on the subject, in standard technical and popular magazines. These were followed by the authorship of his widely-read books, one of -which, on the subject of flight, was "Vehicles of the Air," published nine years ago. In addition, Mr. Lougheed had the benefit of his early association with Montgomery, his later friendship with Chanutc, and his own important researches on bird forms, streamline reaction bodies, and aerodynamics generally besides his professional consulting work in the design of automobiles auto-mobiles and engines, in shop organization, m tool design, and in production produc-tion engineering. Quite reasonably, therefore, does it follow that these six comprehensive new volumes of "Flight Engineering" not only avoid I the out-of-date, immaterial, and impractical, but include much that has never been known heretofore except to a few noted motor and aeroplane designers, and much that has never heretofore been published in any book or periodical. Notwithstanding the high practical and technical value that has been maintained throughout this newest contribution to the literature of flight engineering, the abstrusities and the too-commonly far-fetched applicability applica-bility of the higher mathematics have been scrupulously avoided, only sucji formulas and explanations being admitted as can be understood by anyone familiar with arithmetic, Some day the complexly-mathematical treatment of flight problems will come, but in the meantime flight fundamentals funda-mentals are widely misunderstood even by mathematicians who have evolved reams of interesting calculations from wrong premises as Mr. Lougheed's gift of simple explanation makes conclusively evident. In this, connection much of the merit of Mr. Lougheed's Jiandling of his subject is the wealth of critical commentary on present designs, having for its object the schooling of the student in the design of better aeroplanes, aero-planes, as well as in understanding, operating, and repairing present machines and motors. AN UNPRECEDENTED OPPORTUNITY ; The present time offers opportunity without parallel in industrial history, for young men chiefly equipped with brains, energy, and determination, deter-mination, to gain immediate advancement and assured futures, in this engineering field which seems certain to prove the solution of the war j . IF Y0J ARE HOT IHTEREST ED, PLEASE CONFER A FAVOR ON HIM AND OH US, BY CALLING THIS ADVERTISEMENT TO THE ATTENTIOH OF SOME FRIEND WHO IS INTERESTED 1K d" voted to the matter of motor and pow-eir pow-eir er-plant design and practice, with a final section on "Soaring Flight," a fact of bird performance which herein Is for the first time explained by a cor-; cor-; rect theory, established by new researches. re-searches. Gasoline Engines ic- Introductory Engine Types and Merita Four-Cyclo Motors Two-Cycle Motors t Multiple Motor Equipment Bearings and Lubrication Bearing Types Lubricating Systems Ignition Systems - j- Magneto Ingltion " Battery Ignition ,-Carburetlon ,-Carburetlon Its Explosive Mixtures do -1 Volumetric Efficiency - j"' Carbureters and Vaporizers Fuel Pumps Cooling Systems Water Cooling Air Cooling Oil Cooling Power Transmission Direct Drive Geared Drives Clutches and Universal Joints Air Propellers Propeller Theory and Design Two-Bladed Propellers Multibladed Propellers Propeller Construction Steam and Miscellaneous Power Plants Steam Automobilo Engines Steam Boilers and Generators Miscellaneous 6oarIng Flight lho Bira i'erformance Source of the Energy vi ' problem, and which is sure thereafter to revolutionize the whole structure of civilization, by developing into the most important advance ever made in commercial transportation. . "With the United States and other governments offering higher pay in their air services than in any other branch of their military establishments, establish-ments, and with wages and manufacturing conditions as they are, it requires but a relatively trifling increase in a man's, ability to secure the small increase in pay which will meet the monthly cost of a set of Flight Engineering", and thereby, in most literal truth, make the set 'pay for itself" to any one with the least ambition. . So far, the one great obstacle to the ambitious student of flight has been the poor quality of the little information available, and the almost absolute impossibility of securing any better. Because of the rapidly-changing rapidly-changing status of flight engineering, and because of an often-mistaken policy of secrecy, imposed for commercial as well as for military reasons, there has been an utter dearth of useful literature devoted to this important subject as will be attested by any one who has made even a cursory investigation of the resources of even our largest libraries. Even the periodicals devoted to aviation, because of the factors of hurried prcpara- ', tion and competitive business conditions, and, latterly, the pressure im- posed by the heavy hand of military censorship, have never found it , possible to give complete and unrestricted accounts of tho day-by-day ; progress that has been compassed. m If, therefore, you are likely to be drafted, plan to enlist, or seek your , future in an aeroplane or motor factory or repair ahop, a set of "Flight j Engineering" is the one means to fit yourself quickly for promotion , instead of the ranks, for a good job instead of a poor one, for high pay i instead of a pittance. As has been emphasized, men for the air services J are the best-paid, the most-needed, and the hardest to find. And. more- , over, not only is there needed the type of physical perfection, good men- tality, and specialized training demanded of the men who do the actual ( flyings for every pilot at the actual fighting front, forty men are needed i behind the lines to keep the machines in repair, J PLAN OF PUBLICATION It is with a view to completing publication with the material of the volumes in the most up-to-the-minute form, that the subscription plan of offering "Flight Engineering" to the public has been adopted. Accordingly, Accord-ingly, the work is being initially brought out in the form or pamphlet-like sections, ranging up to 160 pages each, with the sections issued at approxi- , mately weekly intervals. In this way, the subscriber is able to commence i his reading or study, long before the complete work could be available at the boolcstores or libraries. Each section, as it comes from the press, Is temporarily bound in a ; heavy, overlapping, flexible cover, which folds over the edges of the pages in such a manner as to protect them from pocket wear. This puts the , material in such form as to make" it much more convenient for study than J a larger bound volume especially for the average busy student who only ; has timo to assimilate about so much new information each week. j The subscription price for the full set of six volumes is thirty dollars , payable five dollars down and five dollars a month. To subscribers who pay in advanco for the entire set, a cash-in-advance price of twenty- Quantitative Factors Possible Fuel Economy The Aeroplane In War". As a treatise upon the dominating present usefulness of the aeroplane, which In turn Involves an Intricate Interrelationship In-terrelationship with all military and naval tactics, with the further prospect that these may be fundamentally revolutionized rev-olutionized at an early date by impending impend-ing developments, this volume needs no apology. Modern Military Tactics Temporary vs. Permanent Fortifications Fortifica-tions Difficulties of Flanking "Breaking Through" The Aerial Scout Obsolute Scouting Methods Observing and Reporting. "Gun Spotting" b Modern Gunnery ... L. - Fighting Machines Present Types Armament Attack on Troops and Trenches Attacks on Other Aircraft Bombing Machines Present Types and Tactics Bombs and Boinb Dropping Future Possibilities Antl-Alrcraft Artillery Ordinary "Weapons Special Types of Anti -Aircraft Guns The Transport Aeroplane Prospects of Aerial Transport in War "Over the Top" in a Novel Sense Resulting Innovations in Tactics Photographic Mapping Present Stntus Types of Cameras Used Making iMaps from..Photographs five dollars is made. No subscription is- accepted for less than the entire H SC To all subscribers, on either the installment or the cash-in-advance H plan the work is first delivered in the pamphlet form, but we agree that I as soon as the entire -set is thus delivered, the purchaser may then HJ exchange it, at no further cost to him, for a set of the standard six bound volumes, in a substantial and handsome half-leather binding. (For mod- crate additional charges, payable at the time of exchange, a choice will m be offered of still more elaborate bindings, covering airange of papers m and covers, and including some very compact thin-paper editions, and H gome most-attractive full-morocco, flexible-leather, and other bindings.) H The first section of the set is now in readiness for prompt delivery, H so your subscription should not be delayed, if it is your desire to make H an early start on a thorough knowledge of flight engineering, which will JH pay you greater dividends, in satisfaction, advancement, and real money, HJ than you arc likely to secure in any other manner,even for,manytimcs i H the investment H THE TECHNICAL SYNDICATEPublishers j - I 1882 Monadnock Block, Chicago,. JS. A. j: I Gentlcmcns J H ST I V K rJ nllr"n V FIRST OF fllX KQUAL PAf HKBTt OK , H I herewith enclose dollars, as rAYM rNT 1H ruU ro. one subscription for a set of " PLIGHT ENGINEERING" as de-j H 'scribed in your advertising, with the understanding that this work is to be de-; tMg ! Hvered to me h the fonn of pamphlet sections, which arc to be sent as fast as , IVWJiji i they are printed, postage prepaid, to wherever I may request in the united . 'States, or elsewhere where the postal rate is the same, and with the further ; ! I understanding that when the complete set lias been i thus delivered, and fully, 1 . paid for, I irlv then cxchangc.it AT NO ADDITIONAL COST TO MJShLF. . (MB for the six Volumes of the standard set, bound in half; im i LEATHER or for any more expensive binding you may offer oUhatJme, i.;'- M then decide to pay the reasonable additional cost of this. , - j( iRH MAKE IN FULL - "Z I SBI3ttTMA!UN8AD0IltlB. -' tlT V " 1V V .- j M MILITARY ADDRESS, IFOIITEIENT FROM A 10 VI .- ill 9IHK FIRMAMENT AD0REJ3 'J , jllll rieaBoWritoPlalnlr'ith Ink or Pencil, and Give. Full Information In Blnnfcl-lnea Hbl i TllrcrlhlnAVrltlnfC or Incomplete lnformntlonMayl.cnd.to ailstakc and Annoyanco I KlH The Factor of Quality Numbers Necessary to Achieve Results Re-sults Training Military Pilots Qualifications for Military Service Present Organization of Air Services The Aeroplane In Peace. After war comes peace, whether permanent per-manent or temporary, and then the commercial applications of flight, which In this volume are described, discussed, and outlined must take the amazing place In peace which heretofore hereto-fore none but the dreamers have dared predict for them. Commercial Utility of the Aeroplane Futuro Efficiency of Aerial Transport Trans-port Presont Machines too Inefficient Mail and Express Freight Exploration-and Prospecting Hazards that Exist s . jPi The Avoidable Hazards Wm Advantages Over Other Transportation flRH Maintained Speed MM Elimination of "Permanent Ways JHra Individual Ownership fffl Economy Hill International Character of Aerial Ve I hide WiH DiQlculty of Regulation 'Mm Customs and Immigration Laws fjliH Future Migration of Mankind MM Facility for Shifting Population It ! Effect on Centers of Population faini Field of Labor and Place of Resi- denco In II if Inevitable Sociological Results jljjm Destruction of National Boundaries llllll Overcoming of Natural BarrierB ij!jl Bibliography 1BB index llifl |