,THE M O D E L LOCO MOT IVE . ITS DESl GN AN D CON STRUCTION A P ractical M anual on M e B uil ding and M anag ement of ' ' ’ M zmature R ail w ay E ngz nes H E N RY G R E E N L Y m g, ’ ’ Contaz mng 370 I l l ustrations and 9 F aiding P l ates 1 A A A A A L ON D ON PE R CIV AL M AR S H AL L 8: CO. ’ — E T E C. 26 29 POPPIN S COU RT,FL E E T ST RE , . AUTHOR’S PREFACE I N submitting this volume to the general reader a word or in . ‘ two b hn is e explanation of its o jects d scope p rhaps necessary. The book deal s primarily with working model locomotives in all sizes,and, for the most -part,with those built for the instruction and amuse a e I ment of their owners,both during the making and ft rwards . h ave endeavoured to treat the subject thoroughly,and although I fear I have not altogether exhausted the possibilities of miniature locomotive construction,it is to be hoped that th e details and e il th e to component parts severally describ d w l enable , reader . design and build any type of locomotive model to any desired onl its scale . The book is the y one of kind,and may also be recommended to the model engineer who does not exclusively go A l in for locomotive work . s model railway engines in the arger sizes may be made to serve commercial ends,several detail ed l s drawings and two designs of engines of this c a s are included . A M I . M h G. M r . R t I have to thank obins, . for e photograph r M l A I M on page 1 0,and M Percival arshal , . E ,the editor of The M odel E ngineer,for permission to use many of th e il lustrations n s I h contai ed herein . Several of the de igns which ave from time to time prepared for various model- making firms are reproduced, d M M r J notably the mo el idland locomotive and details for ees s W . k . or h m ton a t Lo w e o N t a L T. R C . B sse t of p the S . design for W E h W N . W M . H t e Co . R t L . oc . ar in of est am, ; tank l omotive - ou - n W d . a G. E for Stuart Turner of Shiplake Thames ; the . tank engine and th e engine depicted 011 the frontispiece,built by Flooks Smithies o f Watford,castings of which they respec l tive y supply. I u e M H H r H. r m st also acknowledge my indebt dness to . ar ison, M D . ow M D r E . L r 0. G s . len, y,and other ,for the help they h ave afforded me in various directions. HE NRY GRE E NLY . L D E C ON ON , . 1 8 07 00 I NTRODUCTORY - N OTE BY W. J . TE N N AN T, B U ILDERS of model locomotives are so frequently asked in con versation the prefatory question, Oi what u til ity are your models that a justification of th eir value seems to the writer to be a ’ M nl pardonable prelude for r Gree y s book . It may at once be conceded that th e evil -smelling,dribbling,ten -and - sixpenny model of the type familiar to generations of schoolboys is of use only to such extent as it may serve to encourage in its proud possessor a possibly useful sympathy with things mechanical . The real utility of the model begins for th e amateur mechanic when its construction induces him to exercise and improve his craftsman ul ship and to c tivate an interest in modern locomotive engineering. For th e novice engaged in practical engineering work as an engineer student or as an apprentice,a model manifests its utility h h by making him view locomotive design as a w ole . In t e fore ground oi' his daily life the detail of engineering is so prominent, and therefore bulks so large in the view,as to tend to obscure the broader aspects of engine design with which,among other matters, the beginner sh ould be preparing h imself to deal ; and it is in the production of models,and particul arly in the production of working models,that he may usefully be led to think intelligently upon problems of the kind that his chiefs h ave to solve,and that h e ' himself will h ave to grapple with if in due time th e mantle of responsibility descends upon him . Incidentally,the young pro fessional will probably find that model- building will bring him into touch with the n oniprofessional amateur,and if he attains to any considerable degree of familiarity with amateur work he will be likely to receive a salutary stimulus from observation of the N N I TRODUCTORY OTE. surprising quantity and excellence of a large proportion thereof ; this will assuredly be useful to him,and it will be likely to lead both amateur and professional to prope rly appreciate,and maybe to worthily imitate,the work of such men as th e gifted brothers Cbates and other skilful model - makers whose productions are treasured in the unrivalled collections to be found in the southern galleries of th e Victoria and Al bert M useum,the M ecca of the a mateur of engineering. Coming now to the trade,ready- made model locomotives have been greatly cheapened in cost and improved in design and con: struction within th e last few years ; this improvement is largely due,it is suggested,to Th e M odel E ngineer journal and to the Society of M odel E ngineers,with both of wh ich our author has A been honourably connecte d for some time past . great deal of e xceptional experience has been afforded him in this connection as a designer of locomotive models of all sizes,from commercially i valuable engines of 7 cwt. ,downward,and s recorded in the following well- illustrated pages,in which many useful and interest ing evidences of originality,neatness and ingenuity of design and unique completeness of treatment will be found,together with a regard for elegance of externals which is admirable . That the proportions of a successful working model are not obtainable by slavish reduction of the scale of its prototype is made clear in this volume,which lays down very plainly the lines along which success may reasonably be sought,and thereby would seem A to well justify its existence . ttention is particularly directed to i ” Chapter III . ,on The Principles of Locomotive Des gn, and I ” Chapter V . ,on Boiler Design . C ON TEN TS m p c . I I TR D TI . N O UC ON I L oco m 'r n I . o rv TY PE S III TH E PRI N CI P E E . L S or L ocou orrvn D SI GN H E I V . T GEN ERAL CONSIDE RATIONS or B OI L ER DES I GN H V . T E CONSTRUCTI ON or MODEL L ocou orrvns : FRAM ES, B ooms , RADIAL Axnns oxns AN D Tnvcxs,AN D OTHE R DE TAI LS - V I . WHE E LS ,An ne,CRAN K Axnns,AND a mo ap nmo ARRAN GE ME NTS V I I N . CYLI DERS AND VALVES V V E III . ALV E G ARING I X M TI DE T IL . O ON A S X B OI L ER C TR TI N . ONS UC O XI B OI L ER M ounrmc s AN D T E R FITTI S . O H NG C B T N TEN D E RS B OI L ER FEED I N G D FI R I N G A R R N GE XI I . A S, A KS, , AN A ME NTS — r x D1 .smxs F OB M N R E L comorrvns Ap p nnm . I IATU o LI ST OF PLATES PL ATE PL ATE r rr n n n V I a Detai s an i I ene a a eme t of M otio . d uts e View o f . G l A g ( ) l O d ‘ ’ - for a 1 0 in . au e Tank L oco G . N . R At antic L oco 1 g g . l motive motive . - A Desi n f or a -in sc l e M o e (b) Ten wh ee e Trai in B o ie I . a I Q . d l l d l g g ' Tank motive L oco . N ort E astern Railway L oco i e o c A Desi n f or a -in a ar e mot v N . sc e ( . ( ) g g l l g Ten -wh ee e L ocomotive - l d . III . De i ns f r in s e o s o . ca M e s g g l d l . - - V A M o - n i h h ee r n I I e i . sca e a e onia (a) E g t w led F o t coupled . d l i l C l d n Tank L ocomotive Rai wa L ocomotive N o .