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COVER LLOUISAOUISA FEATURE 50 Years of A QuarryQuarry Astle Park Rally HHunsletunslet
MMakeake a HHeavyeavy A HaightonHaighton DDutyuty IIndexerndexer
MMajorajor HSUHSU ENGINEERING GROUP GGoesoes toto FranceFrance £3.60 THE ORIGINAL MAGAZINE FOR MODEL ENGINEERS 6 SPEED NEW METAL STORE LATHE WITH 12 SPEED NEW NOW OPEN - MILL DRILL- CL500M 500 PAGE MANCHESTER 430mm between centres Compound slide with 4 way tool post Power fed screw cutting facility CATALOGUE CENTRAL Forward/reverse lathe operation Clutch for independent NOW GET YOUR £ .00 mill/drill operation SUPERSTORES 849EXC.VAT ALSO AVAILABLE: £ .80 FREE COPY! 1018INC.VAT CL430 - As above NATIONWIDE but without the IN-STORE Mill/Drill head PHONE £669.00 exc.VAT £838.80 inc.VAT 0844 880 1265 FULL RANGE WHERE QUALITY ONLINE OF ACCESSORIES AVAILABLE COSTS LESS www.machinemart.co.uk
£ .00 ENGINEERS ENGINEERS METAL LATHE 499EXC.VAT £ .80 HEAVY DUTY BENCH VICES 300mm between centres LH/RH thread MILLING 598INC.VAT STEEL WORKBENCHES • A range of fi xed and swivel BOLTLESS screw cutting Electronic variable speed Gear DRILLING FROM ONLY vices with top quality QUICK ASSEMBLY change set Self centering 3 jaw chuck & guard £ .98 cast iron construction Power feed MACHINE 149EXC.VAT STEEL SHELVING £ .98 - CMD300 179INC.VAT FROM ONLY • Simple CL300M • Bench mountable, tilts 45º left £ .99 FROM ONLY • Sturdy lower shelf 18EX.VAT fast assembly £ .98 & right from vertical • Table travel • Durable powder £ .79 29EX.VAT 22INC.VAT in minutes 100x235mm • Table Effective Size coated fi nish CMV140 using only £ .98 LxW: 92 x 400mm 35INC.VAT INCLUDES SINGLE Shown fi tted with MODEL JAW WIDTH BASE EXC.VAT INC.VAT a hammer £ .00 LOCKABLE optional 3 drawer unit ONLY CV100B 100mm Fixed £18.99 £22.79 EXC.VAT £ .00 349 DRAWER CVR100B 100mm Swivel £21.99 £26.39 EXC.VAT £ .80 £84.99 Ex.VAT £101.99 Inc.VAT 469 418INC.VAT CV125B 125mm Fixed £29.98 £35.98 £ .80 MODEL DIMS CVR125B 125mm Swivel £29.98 £35.98 ASSEMBLES 562INC.VAT WxDxH (mm) EXC.VAT INC.VAT AS BENCH OR CV150B 150mm Fixed £43.99 £52.79 CORNER UNIT CWB1000B 1000x650x880 £149.98 £179.98 CVR150B 150mm Swivel £46.99 £56.39 MIG WELDERS CWB1500B 1500x650x880 £199.98 £239.98 FROM ONLY MICRO MILLING & CMV140 140mm Swivel £64.99 £77.99 CHOICE OF 5 COLOURS Quality machines from Britain’s CWB2000B 2000x650x880 £259.98 £311.98 leading supplier £ .98 DRILLING MACHINE 179EX.VAT • All models featured are turbo £ .98 • Bench mountable RED, BLUE, BLACK, 215INC.VAT HEAVY DUTY 8/250 TURBO AIR fan cooled (except • MT2 Spindle Taper COMPRESSORS SILVER & GALVANISED PRO90) • See CMD10 PROFESSIONAL STEEL • Face mill capacity 20mm, TOOL CHESTS online end mill 10mm • Table cross Superb for included travel 90mm, longitudinal & CABINETS range ideal MEASURING accessories travel 180mm The ultimate in tool storage! for DIY, 1 £ .98 EQUIPMENT MODEL MOTOR SPINDLE EXC.VAT INC.VAT 119EX.VAT hobby & FULL RANGE OF SPEED £ .98 semi- HEADSHIELDS, 143INC.VAT FROM ONLY CMD10 150W/230V 100-2000rpm £349.00 £418.80 professional £ .98 TIPS, WIRE, CMD300 470W/230V 0-2500rpm £499.00 £598.80 use 9EX.VAT GAS & MORE 2 £ .98 £ .98 11INC.VAT ANTI FATIGUE 249EX.VAT HUGE MIG £ .98 MODEL DESCRIPTION EXC.VAT INC.VAT * was £490.90 inc.VAT FOAM FLOORING 299INC.VAT CHOICE ‡ was £539.98 inc.VAT 135TE • 6 interlocking foam tiles protect fl ooring & OF SPRAY CM100 150mm/6” Vernier Caliper £9.98 £11.98 GUNS & CM180 0-25mm Micrometer £9.98 £11.98 MODEL MIN-MAX AMPS EXC.VAT INC.VAT provide comfort when standing or kneeling FROM ONLY PRO90 24-90 £179.98 £215.98 Ideal for use in garages, workshops etc. • Each £ .98 AIRTOOLS CM145 150mm/6” Digital Vernier £16.99 £20.39 BIG 2HP 79EX.VAT CM265 300mm/12” Digital Vernier £36.99 £44.39 110E 30-100 £214.99 £257.99 tile is 610 £ .98 135TE Turbo 30-130 £239.98 £287.98 x610mm & MODEL DESCRIPTION DIMS EXC. INC. 7.5CFM 95INC.VAT MODEL MOTOR CFM TANK EXC.VAT INC.VAT HYDRAULIC 151TE Turbo 30-150 £269.98 £323.98 includes WXDXH(MM) VAT VAT 165TEM Turbo 30-155 £339.00 £406.80 detachable, CBB203B 3 Dr step up 710x315x250 £69.98 £83.98 Tiger 8/250 2Hp 7.5 24ltr £79.98 £95.98 PRESSES Tiger 7/250 2Hp 7 24ltr £89.98 £107.98 PROFESSIONAL QUALITY 175TECM Turbo* 30-170 £399.00 £478.80 yellow borders CBB206B 6 Dr Chest 710x328x365 £99.98 £119.98 205TE Turbo‡ 30-185 £429.00 £514.80 £ .98 1 CBB209B 9 Dr Chest 710x315x420 £119.98 £143.98 Tiger 11/250 2.5Hp 9.5 24ltr £119.98 £143.98 Built for tough daily use in 19EX.VAT Tiger 8/510 2Hp 7.5 50ltr £129.98 £155.98 automotive/industrial workshops £ .98 CBB210B 10 Dr Chest 710x315x475 £139.98 £167.98 ARC/TIG 23INC.VAT CBB212B 3 Dr Cabinet 755x470x810 £169.98 £203.98 Tiger 11/510 2.5Hp 9.5 50ltr £149.98 £179.98 • All models include gauge FOR 6 TILES CBB215B 5 Dr Cabinet 758x468x815 £199.98 £239.98 MODEL EXC.VAT INC.VAT INVERTERS CBB213B 3 Dr Cabinet 758x418x975 £199.98 £239.98 ENGINE 4 ton bench‡ £129.98 £155.98 • Used for ARC/TIG FROM ONLY welding • Low amp ANGLE GRINDERS 2 CBB217B 7 Dr Cabinet 758x468x975 £249.98 £299.98 CRANES £ .98 10 ton bench* £189.98 £227.98 149EX.VAT 12 ton floor* £239.98 £287.98 operation - ideal for Fully tested £ .98 FROM ONLY INC.VAT 20 ton floor* £399.00 £478.80 auto bodywork & mild £ .99 to proof load 179 22EX.VAT 50 ton floor‡# £1598.00 £1917.60 /stainless steel TAP & DIE SETS MODEL DESC. EXC.VAT INC.VAT £ .99 CAG800B High # was £1978.80 inc.VAT FROM ONLY 27INC.VAT FROM ONLY CFC500F 1/2 ton folding £149.98 £179.98 £ .98 £ .98 £ .99 quality * Available with/without 7 pce pin, 129EX.VAT 129EXC.VAT INC. DISC 14EX.VAT tungsten CFC100 1 ton folding £154.99 £185.99 £ .98 £ .98 & HANDLE £ .99 CFC1000LR 1 ton £199.98 £239.98 bracket & pressing plate ‡Without kit 155INC.VAT 155INC.VAT 17INC.VAT steel long reach MODEL DISC (MM) MOTOR EXC.VAT INC.VAT Supplied in AT161 * was £203.98 inc.VAT CAG800B NEW 115 800w £22.99 £27.99 metal storage case, ROTARY • Folding and fi xed frames ELECTRODE CON1050B NEW 115 1050w £27.99 £33.59 except 16pce available • Robust, rugged TOOL KIT B&D CD115 115 710w £29.98 £35.98 MODEL AMPS DIA. EXC.VAT INC.VAT TYPE EXC.VAT INC.VAT construction AT101 10/80 1.6 – 2.5mm £129.98 £155.98 CAG2350C NEW 230 2350w £49.98 £51.59 16pce Metric £14.99 £17.99 • Overload safety valve CFC100 CRT40 AT132* 10/130 1.6-3.2mm £159.98 £191.98 24pce UNC/UNF/NPT £19.98 £23.98 AT161 10/160 1.6-4.0mm £199.00 £238.80 BENCH GRINDERS 28pce# Metric £23.99 £28.79 £ .98 HYDRAULIC 29EXC.VAT & STANDS 33pce# Metric/UNF/BSP £31.99 £38.39 £ .98 32pce Metric £41.99 £50.39 LIFTING TABLES Kit 35INC.VAT ARC ACTIVATED • Stands come includes: complete with 6" & 8" #28pce Best Budget Buy, 33pce • Ideal for lifting & HEADSHIELDS AVAILABLE moving models • Height adjustable CORDLESS ROTARY bolt mountings Recommended: stand with clamp CWH7 and feet WITH LIGHT • Foot pedal operated HTL500 TOOL WITH 262 PCE CWH6 FROM ONLY • Rotary tool • 1m KIT ONLY £ .98 anchor holes 39EXC.VAT STAND AVAILABLE FROM £ .00 fl exible drive • 40x £29.98 EX.VAT FROM ONLY EX.VAT £ .98 ONLY £41.99 EX.VAT 259 accessories/consumables £35.98 INC.VAT INC.VAT £ .98 £ .80 47 EX.VAT £50.39 INC.VAT DRILL PRESSES INC.VAT 29 310 £ .99 £ .98 EXC.VAT INC.VAT MODEL MAX. TABLE HEIGHT EXC. INC, 44 35 3-IN-1 SHEET £ .99 LOAD MIN-MAX VAT VAT 53INC.VAT CDS3 METAL • Activates instantly HTL300 300kg 340-900mm £259.00 £310.80 MACHINES when Arc is struck • Protects to EN379 • Suitable CBG8W HTL500 500kg 340-900mm £289.00 £346.80 for arc, MIG, TIG & gas welding features CDP5EB NEW 8" whetstone & DRILL POLISHING KITS CMW-9 6"drystone. STANDS • Kit Inc: Tapered FROM ONLY # With sanding belt £ .98 spindle, Coloured 179EXC.VAT 9 DRAWER MODEL DUTY WHEEL ONLY mop for initial £ .98 WOODEN £ .98 215INC.VAT DIA. EXC.VAT INC.VAT 19EX.VAT cleaning, pure TOOL CHEST CBG6RP DIY 150mm £29.98 £35.98 £ .98 cotton mop for • Bend, Roll & Shear metal • Felt-lined drawers ONLY 23INC.VAT up to 1mm thick Min. Rolling Diameter 39mm CBG6RZ PRO 150mm £39.98 £47.98 £ .98 high polish fi nish • • LxWxH 610 x CBG6RSC HD 150mm £49.98 £59.98 59EX.VAT & polishing compound FROM ONLY • Bending angle 0-90º 280 x 440mm £ .98 £ .98 CBG6SB# PRO 150mm £49.98 £59.98 71INC.VAT Drill not 4" £19.98 Ex VAT £23.98 Inc VAT MODEL BED WIDTH EXC.VAT INC.VAT • Keep £ .98 CBG6RWC HD 150mm £54.99 £65.99 19EX.VAT SBR305 305mm £179.98 £215.98 109EXC.VAT included 6" £24.99 Ex VAT £29.99 Inc VAT £ .98 precision tools £ .98 CBG8W (wet) HD 150/200mm £55.99 £67.19 8" £29.98 Ex VAT £35.98 Inc VAT 23INC.VAT SBR610 610mm £359.00 £430.80 safe and tidy 131INC.VAT V OPEN MON-FRI 8.30-6.00, VISIT YOUR LOCAL SUPERSTORE SAT 8.30-5.30, SUN 10.00-4.00 *NEW STORE OPEN 7 DAYS BARNSLEY Pontefract Rd, Barnsley, S71 1EZ 01226 732297 EXETER 16 Trusham Rd. EX2 8QG 01392 256 744 MIDDLESBROUGH Mandale Triangle, Thornaby 01642 677881 B’HAM GREAT BARR 4 Birmingham Rd. 0121 358 7977 GATESHEAD 50 Lobley Hill Rd. 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Copnor 023 9265 4777 BURTON UPON TRENT 12a Lichfi eld St. DE14 3QZ 01283 564 708 IPSWICH Unit 1 Ipswich Trade Centre, Commercial Road 01473 221253 PRESTON 53 Blackpool Rd. PR2 6BU 01772 703263 CAMBRIDGE 181-183 Histon Road, Cambridge. CB4 3HL 01223 322675 LEEDS 227-229 Kirkstall Rd. LS4 2AS 0113 231 0400 SHEFFIELD 453 London Rd. Heeley. S2 4HJ 0114 258 0831 CARDIFF 029 2046 5424 LEICESTER 0116 261 0688 ONLINE 44-46 City Rd. CF24 3DN 69 Melton Rd. LE4 6PN SIDCUP 13 Blackfen Parade, Blackfen Rd 0208 3042069 CARLISLE 85 London Rd. CA1 2LG 01228 591666 LINCOLN Unit 5. The Pelham Centre. LN5 8HG 01522 543 036 SOUTHAMPTON 516-518 Portswood Rd. 023 8055 7788 www.machinemart.co.uk CHELTENHAM 84 Fairview Road. GL52 2EH 01242 514 402 LIVERPOOL 80-88 London Rd. L3 5NF 0151 709 4484 CHESTER 43-45 St. James Street. CH1 3EY 01244 311258 LONDON CATFORD 289/291 Southend Lane SE6 3RS 0208 695 5684 SOUTHEND 1139-1141 London Rd. Leigh on Sea 01702 483 742 COLCHESTER 4 North Station Rd. CO1 1RE 01206 762831 LONDON 6 Kendal Parade, Edmonton N18 020 8803 0861 STOKE-ON-TRENT 382-396 Waterloo Rd. Hanley 01782 287321 COVENTRY Bishop St. CV1 1HT 024 7622 4227 LONDON 503-507 Lea Bridge Rd. Leyton, E10 020 8558 8284 SUNDERLAND 13-15 Ryhope Rd. Grangetown 0191 510 8773 MAIL ORDER CROYDON 423-427 Brighton Rd, Sth Croydon 020 8763 0640 LONDON 100 The Highway, Docklands 020 7488 2129 SWANSEA 7 Samlet Rd. Llansamlet. SA7 9AG 01792 792969 0115 956 5555 DARLINGTON 214 Northgate. DL1 1RB 01325 380 841 LUTON Unit 1, 326 Dunstable Rd, Luton LU4 8JS 01582 728 063 SWINDON 21 Victoria Rd. SN1 3AW 01793 491717 DEAL (KENT) 182-186 High St. CT14 6BQ 01304 373 434 MAIDSTONE 57 Upper Stone St. ME15 6HE 01622 769 572 TWICKENHAM 83-85 Heath Rd.TW1 4AW 020 8892 9117 DERBY Derwent St. DE1 2ED 01332 290 931 MANCHESTER ALTRINCHAM 71 Manchester Rd. Altrincham 0161 9412 666 WARRINGTON Unit 3, Hawley’s Trade Pk. 01925 630 937 DONCASTER Wheatley Hall Road 01302 245 999 MANCHESTER CENTRAL* 209 Bury New Road M8 8DU 0161 241 1851 WIGAN 2 Harrison Street, WN5 9AU 01942 323 785 CLICK & DUNDEE 24-26 Trades Lane. DD1 3ET 01382 225 140 MANCHESTER OPENSHAW Unit 5, Tower Mill, Ashton Old Rd 0161 223 8376 WOLVERHAMPTON Parkfi eld Rd. Bilston 01902 494186 COLLECT EDINBURGH 163-171 Piersfi eld Terrace 0131 659 5919 MANSFIELD 169 Chesterfi eld Rd. South 01623 622160 WORCESTER 48a Upper Tything. WR1 1JZ 01905 723451 23932 Calls to the catalogue request number above (0844 880 1265) cost 7p per minute plus your telephone company’s network access charge For security reasons, calls may be monitored. All prices correct at time of going to press. We reserve the right to change products and prices at any time. All offers subject to availability, E&OE. 366 374
Published by MyTimeMedia Ltd. Enterprise House, Enterprise Way, Edenbridge, Kent TN8 6HF Tel: 0844 412 2262 From outside UK: +44 (0)1689 869840 www.model-engineer.co.uk SUBSCRIPTIONS UK - New, Renewals & Enquiries Tel: +44(0)1858 438798 Email: [email protected] USA & CANADA - New, Renewals & Enquiries Tel: (001)-866-647-9191 REST OF WORLD - New, Renewals & Enquiries SUBSCRIBE TODAY Tel: +44 (0)1689 869896 Email: [email protected] AND SAVE UP TO 38% BACK ISSUES & BINDERS OFF THE SHOP PRICE Tel: 0844 848 8822 Vol. 215 No. 4516 4 - 17 Sept 2015 From outside UK: +44 2476 322234 PLUS RECEIVE A FREE Email: [email protected] Website: www.myhobbystore.co.uk MINIATURE INTERNAL MODEL ENGINEERING PLANS 352 SMOKE RINGS COMBUSTION Tel: 0844 848 8822 News, views and comment on From outside UK: +44 2476 322234 ENGINES BOOK Website: www.myhobbystore.co.uk/me-plans the world of model engineering. WORTH582 £19.95. EDITORIAL Editor: Diane Carney 353 JOURNEYMAN’S JOTTINGS: See page 351 for details Tel: +44 (0)1539 564750 OLD ENGINES REVIEWED Email: [email protected] Journeyman turns the pages of Tehnical Assistant: Stewart Hart some historic publications. PRODUCTION Designer: Yvette Green 356 OTTO FOUR STROKE ENGINE 374 LBSC ROSE BOWL Illustrator: Grahame Chambers Retouching Manager: Brian Vickers Jan Ridders designs and illustrates COMPETITION 2014 Ad Production: Robin Gray a well mannered engine. Steve Eaton recalls last year’s event. ADVERTISING Senior Account Manager: Duncan Armstrong 360 IMLEC 2014 376 A MAJOR GOES TO FRANCE Email: [email protected] Diane Carney brings a second Ray Griffin transports a machine of Tel: 01634 238893 report from Nottingham. quality to his home near St.Tropez. MARKETING & SUBSCRIPTIONS Subscription Manager: 381 THE 50th ASTLE PARK RALLY Kate Hall 363 ROBERT TIDMAN & CO. STEAM ORGAN ENGINE Diane Carney attends a MANAGEMENT David Owen constructs a small, full size favourite Cheshire show. Head of Design & Production: Julie Miller Group Advertising Manager: Rhona Bolger engine from the days of the steam fair. Email: [email protected] 384 AN EASY TO MAKE HEAVY Tel: 01689 869891 366 LOUISA DUTY INDEXER Chief Executive: Owen Davies The construction of a useful piece of Chairman: Peter Harkness Alan Green meets the challenges of his third Hunslet. workshop equipment by Harprit Sandhu. 368 A BOILER MAKING AID 388 PATRIOTISM: The Royal Ted Jolliffe describes a simple tool Army Ordnance Corps © MyTimeMedia Ltd. 2015 Alan Crossfield describes his All rights reserved ISSN 0026-7325 to ease the fitting of boiler tubes. DOE winning 5 inch gauge Patriot. The Publisher’s written consent must be obtained before any part of this publication may be reproduced in any form whatsoever, including photocopiers, 371 IDRIS: A 16mm LOCOMOTIVE and information retrieval systems. All reasonable care is taken in the preparation of the magazine contents, but the publishers cannot be held legally responsible FOR A NOVICE ENGINEER 390 INTERNAL COMBUSTION: for errors in the contents of this magazine or for any loss however arising from such errors, including loss resulting from negligence of our staff. Reliance placed Martin Ranson turns to THEORY AND PRACTICE upon the contents of this magazine is at reader’s own risk. locomotive building. Ron Wright continues his in-depth Model Engineer, ISSN 0026-7325, is published fortnightly with a third issue in May and October by MYTIMEMEDIA Ltd, Enterprise House, Enterprise Way, course on understanding I/C. Edenbridge, Kent TN8 6HF, UK. The US annual subscription price is 70.95GBP (equivalent to approximately 118USD). Airfreight and mailing in the USA by *Print and Print + Digital agent named Air Business Ltd, c/o Worldnet Shipping Inc., MINIATURE INTERNAL Subscriptions FREE Only 156-15, 146th Avenue, 2nd Floor, Jamaica, NY 11434, USA. Periodicals BOOK COMBUSTION ENGINES 394 CLUB NEWS FOR ALL NEW UK Vol. 215 No. 4516 • 4 - 17 September 2015 postage paid at Jamaica NY 11431. US Postmaster: Send address changes SUBSCRIBERS* to Model Engineer, Worldnet Shipping Inc., 156-15, 146th Avenue, 2nd Floor, WORTH £19.95 Geoff Theasby takes a look at Jamaica, NY 11434, USA. Subscription records are maintained at CDS GLOBAL what is happening in the clubs. Ltd, Tower House, Sovereign Park, Market Harborough, Leicester, LE16 9EF. Air Business Ltd is acting as our mailing agent. Join our online community www.model-engineer.co.uk 397 DIARY COVER LOUISA FEATURE 50 Years of A Quarry Astle Park Rally Forthcoming events. http://www.facebook.com/modelengineersworkshop Hunslet
http://twitter.com/ modelengineers ON THE COVER... Make a Heavy A Haighton Duty Indexer
Major HSU ENGINEERING GROUP Goes to France £3.60 Polishing in the early morning sunshine at Astle Park. THE ORIGINAL MAGAZINE FOR MODEL ENGINEERS Photo by Diane Carney. ME4516 Cover.indd 205 13/08/2015 11:23 www.model-engineer.co.uk 343
A fine exhibition quality model of the British Railways Standard Class 9F 2-10-0 Tender Locomotive No 92220 ‘Evening Star’, by Mr Ron Martin The Transport Sale Est. £50,000 - £60,000 Auction Date: Wednesday 23rd September 2015 Auction Location: Donnington Priory, Newbury, Berkshire RG14 2JE Viewing times and online catalogue: www.dreweatts.com For more information please contact: [email protected] | 01635 553 588
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A wide range of innovative tools and accessories available! This is just a small selection from the ranges we offer! Please buy from your local stockist whenever possible. You can find them, and view www.expotools.com all of our products at: www.expotools.com TRADE ENQUIRIES WELCOMED. In case of difficulty obtaining items you can order direct on our website.
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g n i t r a P Parting d e te r e v n i inverted R oR o For more information please visit our website at Parting inverted FoR The eccentricengineering.com.au
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John Winter 38TH ANNUAL & Co. Ltd. • MAKE YOUR OWN CASTINGS • Model Engineering and Don’t wait until 2016 to Small Scale enter your model! Foundry Work Warwickshire Exhibition Apply to Carol White for a FREE Centre Catalogue/Price List • Crucibles • IngotsI • SafetyS f wear • Casting fluxes • Refractories, thermal blankets & bricks • Oil bonded sands/sands/binders • Sodium Silicates/Esters Enter your work, • Tel: Halifax +44(0)1422 364213 • Meridienne Email: [email protected] be part of the show Exhibitions Ltd P.O. BOX 21 Washer Lane Works, Halifax HX2 7DP Please take a look at our website: 15th to 18th October 2015 • www.johnwinter.co.uk • ENTER YOUR MODEL in this Prestigious Competition There are sixteen classes covering every aspect of model engineering WHY NOT DOWNLOAD AN ENTRY FORM TODAY? www.midlandsmodelengineering.co.uk or call us on 01926 614101 All exhibitors receive a commemorative plaque and attendance certificate. Cash prizes are awarded where applicable. BOOK YOUR TICKETS NOW FREE SHOW GUIDE ADMISSION ONLINE FULL PRICE * Tickets are PRICES TICKETS* TICKETS** available via our website at discounted prices. Adult £9.00 £10.00 ** Full price tickets are available on the Senior Citizen £8.00 £9.00 day from the ticket office or by phone Child (5-14 yrs) £5.00 £5.50 before 7th October 2015. Call on 01926 614101. Family Ticket 1 (1 adult & up to 3 children) £14.00 £15.50 SHUTTLE BUS FROM LEAMINGTON SPA RAILWAY STATION Family Ticket 2 (2 adults & up to 3 children) £23.00 £25.50 FREE PARKING AT VENUE Lecture programme, exhibitor list & bus timetables online. GROUP DISCOUNTS: 10+ enter code GRP10 on website. www.midlandsmodelengineering.co.uk
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www.subscription.co.uk/mdel/V811 0844Lines open weekdays543 82008am – 9.30pm & Saturday 8am – 4pm BT landline calls to 0844 numbers will cost no more than 5p per minute. Calls from mobiles usually cost more. Model Engineering Liaison Group New from Machine mart In Smoke Rings, Issue 4514 The new Autumn/ Winter catalogue (7 August 2015) I raised the from Machine Mart is now available. question of the testing of The New 500 page catalogue features steel boilers and asked over 1,100 price cuts and new readers, particularly products meaning it’s a ‘must have’ those involved with this for model engineers’ workshops. Over discipline, what their 15,000 items of tools and machinery thoughts might be on the are available in stores across the country subject. I have not heard and online; tools for all your model engineering needs. To order back from anyone so far your catalogue simply go online to machinemart.co.uk, visit but I did have a phone your local store or call 0844 880 1265. call from the Chairman of the Southern Federation of Model Engineering Societies 100 Yeas ago… (SF) to say, quite correctly, It is always interesting to Watkins-Pitchford of Lamport that they are themselves not look back at past issues of Rectory, himself an amateur policy makers. The policy Model Engineer as I’m sure engineer who realised the is written by the Model many readers do. During wealth of untapped, skilled Engineering Liaison Group the time of the First World labour that existed amongst the (MELG) which consists of one War the magazine, in its own Model Engineering fraternity. representative from each of way, provided something He spoke to a reporter from four constituents: the SF, the of a running commentary the Daily Echo of his idea for Northern Association of Model on proceedings. I glanced ‘bringing to the assistance of Engineers, the 7¼ Inch Gauge back, recently, at the issues the works producing munitions Society and the Midland of Summer 1915 to fi nd there of war a great reserve of Federation of Model Engineers was much coverage of the engineering skill that is at plus Tony Wood from Walker Amateur Ordnance Volunteers present practically unabsorbed’. Midgeley, Insurance Brokers, (AOV) munitions work scheme, Armstrong of Elswick was who Chairs the MELG. I am formed to supplement the only fi rm to take up the grateful to Brent Hudson, SF the Government output of offer made by the Reverand, Chairman, for his phone call munitions by voluntary labour. realising its potential, and and am happy to correct here In great and particular demand sent him contact details of a any inaccuracy that might have were shell bases. The instigator number of other men who had been conveyed in my text. of the scheme was the Rev. W. communicated similar offers of help, but with whom they were unable to correspond individually. Rev. Pitchford Traction Engine Rallies wrote to all of these souls, plus MEET THE In this issue I bring you a everyone he could think of EDITORIAL TEAM very brief report on the 50th The 50th Astle Park Rally that might have been able to
he first Chelford Traction Diane Engine Rally I attended 1 Carney Twas probably 1968, so Astle Park Traction Engine not quite the first one, but I help, and found the response attends a favourite only recall missing one since then and that was due to going DIANE traction to Somerset to collect our engine rally at Chelford, Sentinel waggon the year we Rally which I hope you will Cheshire. purchased it. Every New Year, to be ‘most gratifying’. The CARNEY as we open up a new calendar, the second weekend in August is circled in red. Astle Park! As a family we spend quite Editor enjoy reading; the rally has a lot of our summer weekends Model Engineer of 15 July attending various rallies in the North West; some are old, established events and there are always one or two new always been a highlight of gatherings springing up but 1915 published the drawing from the point of view of an exhibitor, each has its own good points and its foibles. Ask anyone who attends regularly, however, and they will tell you my summer. This led me to there’s something about Astle of the shell base - section Park that gives it the edge over all the rest. It has its own unique atmosphere, which can Burrell single crank compound (SCC) Stanley Monarch on the left and Foster, be put down to many things Winnie on the right. Both attended the first rally in 1966. thinking - it was not really but the beautiful parkland and elevation - and amateur setting is probably one of the infancy, there had been several small events in the South Of the four men mentioned, contributing factors. It’s been only Bill Briggs of the original the traditional meeting place Cheshire and North Midlands areas for two or three years, committee is still with us and for the many engine owners, he was in attendance with drivers and families in this area yet there was a significant until the coming of Old Glory number of traction engines in his Wallis & Steevens traction engineers were invited to ever since its inception and for preservation in the north of the engine. Two of the original most, of course, it’s a highlight committee’s engines were of the social calendar. This county and, these being the days before low-loaders were present (photo 1); Burrell SCC, year was also blessed with Stanley Monarch perfect rally weather too. in common use, it was thought of 1900, in 1988 that such events had that there was a need for an No. 2336, which was owned send away for a blank, at This short report focuses on by Alan Barber and is now the full size traction engines, event within a day’s travelling time. Four local gentlemen of in the care of his grandson, of course, but there were Adrian (who was instrumental countless other exhibits the preservation movement - Alan Barber, George Lea, Jim in organising this year’s to look at. There is always special celebrations) and their own place in the news a huge section of vintage Dakin and Bill Briggs - got the cost of one shilling, with Foster general purpose engine commercial vehicles, military together to devise a plan to put Winnie, Works No. 12539 vehicles, vintage and classic on an event in their own neck STEWART of the woods, to which they of 1910, then owned by Jim cars (270 in the programme!) Dakin of Goostrey, now owned and motorbikes and there would invite all the local engine owners. Their first approach by Frank Lythgoe of Lymm and trade; apart from in the back were about 20 miniature presently in the care of, and which they were required was to the Lower Withington HART traction engines. presented by, Phil Moston who Village Hall Committee who had had some involvement was also engine steward this Early days year. The first rally was held in 1966 with similar events down the road at Jodrell Bank. They It was good to see a number Technical pages of The Worlds Fair and came about due to a need of other engines that had also to prove their ability before were happy to assist and the to fill something of a gap in attended the first rally in 1966. the region. Although traction group looked at hiring Astle Photograph 2 is of Burrell engine rallies were in their Park, a local and ideal location Assistant in many ways. Devonshire Engine No. 2950, Little Mac owned by David where occasional snippets www.model-engineer.co.uk >> being commissioned to start
381 381_383 Astle Park.indd 381
of news were reported, 13/08/2015 09:43 production. it was only ‘The people to whom I in Model Engineer that such coverage was to be found. am appealing’ he wrote, ‘are The fl edgling days of traction engine rallies in the 1950s amateur engineers, governing and 1960s were extensively reported in this magazine and bodies of schools where YVETTE GREEN reading those old reports is, for me, quite fascinating. We are engineering is taught, owners Designer now, of course, in an era when many established rallies are of estate workshops where celebrating 40, 50 or even 60 years in existence. I personally lathes are run, fi rms who employ enjoy traction engine rallies and have been involved with resident mechanics for the repair them all my life. Would readers welcome more such reports - of machinery and associations of not every issue, of course, but now and again? amateur engineers.’ to be continued…
352 Model Engineer 4 September 2015 Journeyman’s Jottings PART 8 Old Engines Reviewed
Journeyman turns the pages of some historic publications.
Continued from p.811 M.E. 4509, 29 May 2015
The journals, Engineering and The Engineer provide a wealth of material for those looking for an unusual modelling project. This occasional series will look at some less well-known designs, briefly review the contemporary description, analyse their potential and offer some interesting suggestions.
Fig 40
Four Cylinder Engine: Engineering, One wonders if the initial use for the February 18th, 1876. engine was a good excuse to justify Following on from Chapman’s a prototype engine? To quote the Link Movement Engine, there description: are numerous other attempts at ‘Mr. Brown mounts a plate on the alternative engine designs. One, oblique pin of the crank at the end which I hope to consider soon, will be of the driving shaft and transmits the West Six Cylinder Disc Engine. In the pressure of the pistons to this the meantime, a contemporary design disc through struts having spherical by Mr. C. Brown and manufactured ends as shown in the engravings. by the Swiss Locomotive and Engine The disc crank plate - as we may call Works, Winterthur is illustrated for our it - is prevented from rotating by pins consideration (fig 40). working in guides as shown in Fig. 4 Dating from 1874 and built for the [of the engraving]. purpose of driving a fan at the Swiss Mr. Brown makes his valve all in Locomotive Works, the engine utilises one piece and provides it with teeth four cylinders and a ‘disc crank plate’. ‘a’ around the periphery, these teeth >> www.model-engineer.co.uk 353 gearing with other teeth ‘b’ Water Tube Boiler for Fig 41 formed on the valve chest Motor Cars: Engineering, cover, as shown in Figs. 1 & 2. April 14th, 1899. The effect of this is that a slow Back a couple of installments and constant rotary motion of we considered some unusual the slide valve on its face is steam boilers, hence it seemed insured, and Mr. Brown writes time to have a closer look at us that with this arrangement another example. This particular the rubbing surfaces take a case constructed by Messrs. T. beautiful polish, and remain in Toward & Co. has some features absolutely perfect condition.’ that would make for a useful but This would be a fascinating compact boiler. Exactly what engine to see reproduced measures would be needed to in model form; the only reduce this boiler to a smaller disappointment being that scale I leave to those with more all the workings would be know-how. The thickness of hidden from view. An altered material and flange accuracy form might allow for the cover would seem to be critical. The of the disc crank plate end description was as follows: to be produced with some ‘The general arrangement of ‘windows’? Also owing to the the boiler is well shown in Fig. actual construction, some 1 (fig 41)whilst its construction thought would be needed as will be easily understood to the assembly of parts in from Fig 2. 2 and 3 (fig 42) a particular order. It seemed which show it in front and side feasible to install pistons first, elevation. As there shown, the then piston rods already fitted to boiler consists essentially of two the crank plate disc and driving tube plates, connected across shaft. The final components to by water tubes at their lower be added would be the valve portion, and above by a single and bottom cover. As a slight large tube which acts as a aside, Mr. Brown also designed steam drum. Flanged covers or some steam locomotives and end doors, suitably stayed, form steam trams upon which we the water pockets, into which may turn our attention later. all the tubes open. The tubes, it will be seen, are inclined, so as to promote circulation in a Fig 42 definite direction. By removing the end doors easy access is gained to the tubes for cleaning or repairs. The top and sides of the boiler are enclosed with a casing of light steel, which is in general lined with firebrick, though in cases in which the utmost degree of lightness is not aimed at, water spaces may be used instead. This casing extends below the tube- plates and serves to form the furnace and support the grate. The boiler is a quick steamer, as is shown by the following particulars of a test made with the one we illustrate above.
• Lighted up on coke... 1.18pm. • Water boiling from all cold...... 1.32pm • 10lb. steam...... 1.36pm • 20lb. steam...... 1.38pm • 50lb. steam...... 1.40pm • 100lb. steam...... 1.41pm • 150lb. steam...... 1.41 ½ pm • 180lb. steam. Safety valve lifted...... 1.42pm
354 Model Engineer 4 September 2015 HISTORIC ENGINEERING
Fig 43
• Trial began with strong happens to live next to an old head is detachable, but is so gas is the fuel. The generator is blast in chimney ...... 1.46pm and now converted telephone shaped as to permit the entry shunt wound, normally to give • Finished ...... 2.46pm exchange. In the front yard of cooling water from the a pressure of 16 volts. area stands a massive mobile jackets of the barrel. Careful The set is used for other In an hours test, made to phone mast. Quite what the consideration has been given purposes than that of the determine the capacity of this original driver of the van would to the reduction of friction, not automatic telephone systems. boiler, water was evaporated at make of our modern means of only to improve the effi ciency It fi nds useful service for small a pressure of 190 lb per inch communication we shall not of the engine, but also to lighting installations and for above the atmosphere, the hazard a guess but he would reduce wear and tear and charging batteries. A unit of the amount being 615 lb and the recognise, no doubt, the small thus remove the necessity for same type but for 500 Watts steam being perfectly dry. The generator set illustrated here. frequent overhauls. A bronze capacity is also manufactured makers state that even when On fi rst glance it is amusing to bush is used for the small end by Messrs. Stuart Turner, Ltd., worked with a forced draught see that the magneto is nearly of the connecting rod, but the and is used on the exhibition equal to 4 in. of water the as big as the engine itself. Both big end is provided with a roller stand to supply current for boiler does not prime.’ combined probably weigh less type of bearing. The simplicity lighting purposes and for the than the generator (fi g 43). of the arrangement at the crank operation of a number of motor Generator for Automatic The generator set was pin is evident from Fig. 3, and driven models.’ Telephone Exchanges: manufactured to supply 120 the provision of balance weight The mention of Stuart Engineering, June 20th 1924. Watts for the GPO to meet on the crank, which is also Turner reminds me of a small Stepping into the 20th Century the power requirements of there shown, makes for smooth project that has been running now, we can consider a small automatic telephone running. A roller bearing is now for 23 years. I was able neat 120 Watt generator exchanges. The challenge for fi tted to the crankshaft near to purchase a set of part manufactured by Messrs. Stuart Turner was to produce the overhung crank. This, with machined castings for a Stuart Stuart Turner Ltd., Henley- a reliable power supply, with a ball race at the end, gives No. 4 vertical steam engine on-Thames. Not a name low noise production and ample support to the shaft for the excessive sum of fi ve that should be strange or once having been started to and ensures that the engine, pounds. From time to time unheard of in the Model be left running unsupervised. though small, will stand up to progress has been made on Engineering world as the The engine illustrated in the hard and continuous service. a couple of items; eventually range of other products was accompanying drawing was From the fl ywheel the drive I hope to complete it. More also considerable. Whilst exhibited on the Stuart Turner is taken through a fl exible effort has been required to contemplating this small stand at the British Empire coupling to the dynamo. A correct or replace some of the engine and generator from the Exhibition in the same year. governor of the trip type is components that have been original Henley-on-Thames Part of the description ran as provided, which cuts out the part ‘massacred’ than was based company, the thought follows: magneto should the speed, initially anticipated … but it extended to the changed world ‘The engine has a bore of through any cause, become was still worth the outlay for we now live in as it refl ects an 1¾ in., while the stroke is 2 in. excessive. The engine may be the main castings. Having read age now long gone where the Further information from the fi tted for use on petrol or coal through this description for the GPO controlled not only the description is as follows: gas. When petrol is used, the generator I am inclined to use post but the telecom industry. A The two stroke cycle is used, lubricating oil is mixed with the the completed engine in a 12 local vintage vehicle enthusiast and consequently there are fuel and reaches the interior of volt steam generator set. has a lovingly restored example no movable valves, tappets the cylinder with it. A drip feed of a green GPO van. He also or valve gears. The cylinder lubricator is fi tted, however, if ●To be continued. www.model-engineer.co.uk 355 Otto Four Stroke EnginePART 4
This four stroke engine is intended for the model engineer with moderate skills. Whilst not a step-by-step construction series, the drawings and associated clear illustrations are the focus of the article, with simple explanations given where required.
The carburettor Jan Ridders Firstly I copied, more or less, the classic carburettor that and, as a result, no carbon opposite is true; in fact it is designs and I had used for the Atkinson soot or wet spark-plug due to only a small arrangement, illustrates a engine. Provided it is made incomplete combustion; integrated into and on the well behaved accurately this carburettor • The ideal ratio petrol vapour/ petrol tank; four stroke operates reasonably well but air of 1 to 14 is easily • This carburettor cannot be engine. it was the most critical part of obtainable by adjusting overheated because there is the engine. The adjustment a simple regulator for no heat conduction to it from is rather sensitive, there is a adding extra air. This very the cylinder. The length of Continued from p.93 constant risk of flooding the homogeneous gas mix the (rubber) connection tube M.E. 4512, 10 July 2015 engine and carbon soot readily provides for a perfectly to the intake manifold is not accumulates on the spark plug running engine; critical at all. I didn’t notice due to incomplete combustion • The engine is immediately any difference between using of the fuel mix. provided with the correct a 10 and a 50cm tube length! I was not, therefore, satisfied gas mix so starting up is very The possible locations for with this carburettor and I was reliable and fast without the this carburettor is therefore advised by those who know, need for choke. Choking is very flexible; that is was hardly possible actually not possible with this • Regulation of the petrol level to implement substantial system; is irrelevant; improvements on its basic • In fact it is no longer possible • No risk of stoppages; design. That was the reason to flood the engine - at least there are no narrow ‘flood I designed a completely I haven’t succeeded in doing gates’ and any possible new alternative, one which that so far; contaminating dust particles produces a mix of air and • The speed of the engine remain visible in the petrol 100% molecular petrol vapour can be easily controlled by tank; they disappear while - instead of liquid petrol operation of the additional air draining the tank at the end droplets - with the optimal regulator on the rear of the of a demonstration; ratio of about 1 to 14 (petrol/ tank; • Petrol consumption is minimal; air). The performance of this • This carburettor design is no more than necessary for carburettor is astonishingly very simple: no venturi, no the power created; good with multiple advantages: petrol jet with needle, no • No chance for petrol leaks to accurate dimensions, no the outside of the carburettor, • There is always 100% opportunity for false air and/ therefore safe and without molecular petrol vapour in or petrol leaks; unpleasant smells. the gas mix, consequently • This carburettor may look there are never any liquid somewhat bigger than I now use this carburettor for petrol droplets in the cylinder the classic one but the all my stationary IC engines.
356 Model Engineer 4 September 2015 SIMPLE FOUR STROKE Fig 11
>> www.model-engineer.co.uk 357 Fig 12
358 Model Engineer 4 September 2015 SIMPLE FOUR STROKE
NOTES TO THE DIAGRAMS
The moving piston in the cylinder ‘sucks’ on the carburetor - until the engine runs at a comfortable speed again. From this below the piston with a two stroke engine and above the piston point the situation becomes more stable. The volatile element with a four stroke engine. This causes an air stream through the in the fuel also causes some adjustment sensitivity at the very tank of the carburettor via the air intake pipe on the tank of the start but that improves quickly as its concentration decreases. carburettor. The air is streaming over the petrol surface taking Usually, after some minutes from fi rst starting the engine will 100% molecular petrol vapour with it, creating a gas mix without become stable and easily controllable. petrol droplets. In principle droplets burn less easily in the This separation effect of the fuel can be avoided by using cylinder than 100% petrol vapour. Coleman Fuel. It is a super refi ned kind of petrol with an The primary gas mix in the tank contains more petrol vapour absence of very volatile and heavy hydrocarbons components. than necessary for the ideal ratio of 1 part petrol to 14 parts The composition of this fuel is almost constant so adjustments of air. That’s why extra air must be added at the exit of the to the carburettor are much less sensitive than when using carburettor tank through a slot in the connection pipe. The standard petrol. Because there are no nasty residues of heavy diagram describes this adjustable air inlet; decreasing the hydrocarbons this fuel can be used until the tank is empty. This amount of extra air will increase the amount of primary gas mix Coleman Fuel is used for camping stoves and is easily obtainable from the tank and increasing it will, of course, have the opposite from camping and outdoor pursuits retailers. effect. That means that there will always be a point at which A non-return check valve must be put in somewhere between the ideal ratio of 1 to 14 occurs, at which point the engine will the carburettor and the intake manifold of the engine. This is start running. Changing the petrol vapour/air ratio will affect the always necessary for two stroke engines to avoid the compressed engine’s speed - so the engine’s speed can be regulated with the gas mix below the piston to be pushed back into the carburettor. same adjustment nut to a certain extent. For four stroke engines this is a safety precaution because a back Fresh motor-car petrol contains a very volatile and stream through the carburettor can occur at an unexpected back combustible element that must be mixed with comparatively stroke of the engine. This may not be immediately dangerous large volumes of air. For that reason it is necessary, at the fi rst with this open system, but it’s undesirable anyway. engine start-up, to add much air to the primary gas mix. Open The gas pressure between the cylinder and the carburettor is the slot completely when starting up the engine (e.g. with a about atmospheric so the carburettor can be simply connected hand drill) and gradually turn the nut over the slot, reducing with a rubber hose, the length of which is not critical at all. the air intake, until you hear the engine take over. Somewhere It is advisable to fi ll the tank not more than half. Model engines around this position of the nut, the engine will start up with cylinder content up to 15 cubic centimeters can run for 15 perfectly well, most of the time, with fresh petrol. Depending minutes or longer which is more than enough for a successful on the consumption of the engine this volatile component demonstration in my opinion. The size of the tank doesn’t affect will disappear gradually, causing the engine’s speed to reduce the functioning of the carburettor at all so one can enlarge the slightly. At that moment the extra air must also be decreased tank if preferred.
On Sale 11th September No.233 COMING UP IN THE AUTUMN ISSUE
› A rare aid to fi ling, Bill Morris describes a swing tool.
› The return of CNC in the Home Workshop sees Marcus Bowman making a pair of motorcycle heel guards.
› Mark Noel continues our theme of mill modifi cation and restoration by detailing improvements to his Myford VMB.
www.model-engineer.co.uk 359 17 PART 2 IMLEC 2015
18
Karen Howard makes up a good coal fire in preparation for her run. Karen’s first run which was sadly discounted.
IMLEC was hosted this year engine, including the fitting After his early morning delay by Nottingham Society of of a Reg Chambers boiler due to coupling alignment Diane in 1989. It was often used problems, Steve Eaton was Model and Experimental Carney but never quite finished until next to go with his 3½ inch brings an Engineers. This was the 2006 when it was taken into gauge V4, Bantam Cock - yet illustrated second time this club has the workshop, stripped down another LBSC design and one report on this organised the event and and not allowed out until all of Steve’s earliest locomotives year’s contest for what a splendid weekend the platework, cleading, cab built when he was but a it proved to be. and detailing was made and teenager (so not that long ago, the Martin Evans fitted. Today it looks a very surely?). This engine has run in Challenge Trophy. respectable Hielan’ Lassie IMLEC several times and once aren Howard, the first and bears the name, Ghillie took the award for best 3½ of the ladies, was next Dhu (a wee, kindly natured, inch gauge locomotive (photo Continued from p.295 Kon the track (photos 17 dark haired fairy inhabiting 19). Steve took five adults M.E. 4515, 21 August 2015 and 18). This locomotive was the northern West Highlands plus his young niece, who has purchased as nothing more I believe). Very unfortunately attended several IMLECs with than a rolling chassis and over Karen’s run was thwarted him, and completed the run many years was gradually by the Dynamometer bug (a in his usual style - faultless completed to being a runnable wee, bad tempered, frizzy driving technique and burning haired fairy inhabiting the about three shovelfuls of coal. Dyno car) and what was Okay, a slight exaggeration, 19 a splendid run for a little perhaps, but he was the only engine was discounted as Driver to use less than a pound the recorder only worked for of coal, as the table tells us, the first two minutes of the returning into the station with run. Karen bravely agreed to a few glowing embers and a start a second attempt later knowing smile. It wasn’t all in the afternoon but during plain sailing though; he told me that run had to ask two of after the run that the axle pump her passengers to alight packed up on the first lap so early on as she struggled to he was forced to do a quick lift the train up the tortuous course in using an injector! The Nottingham curves with the only 3½ inch gauge entrant to five she started out with. Her finish above Steve in the table final place was 30th but here’s was a narrow gauge 2-6-2 so hoping her first go at IMLEC he can take credit for being Steve Eaton tries to work out how to use the injector! will not be her last. the highest placed standard
360 Model Engineer 4 September 2015 IMLEC 2015
20 21
A brave attempt by Linda Gearing and Tom.
After Linda came Paul has gradually moved up the Pavier from Llanelli. The rivalry table each time, fi nishing between the Paviers - father fourth at Bournemouth and son - has added a little last year. At his home club, merriment to IMLECs of recent Urmston & District MES years. It’s largely irrelevant the engine is a very regular whether either of them wins - passenger hauler and Keith as long as Paul fi nishes ahead has recently completed some of his son! Well, it was certainly improvements in the hope Paul’s day today as he took of getting into the top three, fi fth place (three paces above perhaps. The locomotive Ben!) with Smuggler after a has had a new grate, better terrifi c run of just under 31 superheaters, steel fi re arch, minutes with 16 passengers balanced slide valves and a (photo 22). For a while he modifi ed blast arrangement. James Tilbury with the late Arthur Eve’s American Baldwin tank engine. sat in the top place on the Opting to take 10 passengers leader board. This GNR/LNER he set off quite well and had gauge locomotive achieving an bad at 1.152 placing James in Class O3, 2-8-0 to the Martin a good, steady run for over effi ciency of 1.296% and 8th 13th place. Evans design is a good IMLEC 32 minutes. Unfortunately the place over all. The second of the ladies engine, built to haul heavy effi ciency fi gure was not as From one extreme to the was next into the station. trains; expertly driven and well good as previous years and other, one might be tempted to Linda Gearing was driving a turned out in its lined black Keith fi nished 14th, adjacent say on watching the approach Simplex originally built about 23 livery it performed extremely to his son in the table as it of the next competitor. James years ago by a fellow Fareham well on the day. happened. Tilbury from Urmston & District Society member, Tom Harrison. Keith Tilbury has competed The second-last run MES brought along a club Martin and Linda bought it last with his nine year old Polly for Saturday was by Karl engine bequeathed to the year hoping that its steel boiler V at every IMLEC that I have Midgeley from Gravesend UDMES but presently in the might last one more summer attended in recent years and with a beautiful LMS 5XP, 5612 care of James and his father, but it wasn’t to be, so Martin Keith. It is a freelance engine made a new copper boiler for built by the late Arthur Eve it and refurbished the running 22 and based on a Baldwin 2-4-2 gear. It ran several times narrow gauge tank locomotive without cleading and proved and - as I have said in these to be a good, free steamer pages before - is an engine so it was fully fi nished off and of great character and has painted and lined in Spring proved itself to be a good, this year. Whilst it had not reliable runner too (photo competed in IMLEC before, 20). James opted to take 12 it did once win its own club’s passengers having plenty of effi ciency trial so perhaps Linda faith in the pulling power of this had high hopes for today? For locomotive. He had no diffi culty a little engine, though, it did in lifting the train and had a consume rather a lot of coal at very good run of 33 minutes a fraction over two pounds but exactly. Coal consumption was Linda’s fi ve passengers enjoyed quite high, hardly surprisingly in the whole 27 minute trip and this large locomotive, and the with a thermal effi ciency of thermal effi ciency was not too 0.709% she was placed 24th. Paul Pavier, head down and determined! >> www.model-engineer.co.uk 361 23 24
Ben Healey’s splendid LMS 5XP basks in the afternoon sun. Driver Karl Midgeley climbs the rising curves.
Jamaica (photos 23 and 24). by-side with a freelance tank ran for fully 35 minutes, one bogie was quickly re-railed and This engine looked glorious in engine of similar size and with of the longest runs of the day, Kevan was on his way again. the sunshine and I know Karl which Karl has competed at and this possibly cost him in As expected (as always?) the was looking forward to the run. IMLEC several times so taking terms of coal consumption. coal consumption was the His grandfather, Ben Healey, part with the ‘Jubilee’ was Deciding whether or not to highest of the competition, yet had built this locomotive side- going to make a change. Karl squeeze in that extra lap can the ‘work done’ figure was not be a difficult decision but when quite the highest but only the things are going well - why second highest (of which more 25 not give it a go? Finishing just later). Kevan finished in 22nd under the mid point of the table place - but must surely be in this was a creditable run with a the top three when it comes to good load. entertainment value! IMLEC would not be IMLEC As the evening sunshine without the regular Saturday bathed the station, Karen back shift being worked by Howard (photo 27) started her Kevan Ayling of Worthing with second attempt (as reported his Kitson-Meyer 2-8-0 0-8-2 above) following the earlier (photos 25 and 26). This much problems and the competitors, anticipated run was completed visitors and spectators settled in just under 30 minutes and down to enjoy a delightful 28 passengers enjoyed the buffet outside the club house. experience. (There was some All in all a most enjoyable day. question as to why the rules Fingers were crossed for some put a limit of 28 on a train load more good weather on Sunday. - it’s a rule that seems lTo be continued. to be applied in some places an not others so I think it needs addressing 27 as no-one could remember quite why it is there at all. I suspect on Kevan Ayling takes a delivery of coal. More please… this occasion the number of available trucks might have been the limiting 26 factor.) Kevan set off with his train load and was making good progress until the front bogie derailed whilst navigating the traverser. It wasn’t a high speed derailment but a combination of this locomotive possibly being a little light on the front and a very slight misalignment at an expansion joint combined Karen Howard completes her second run as 28 passengers enjoy an evening excursion. to cause a problem. The Paul Kellar takes the final reading of the day.
362 Model Engineer 4 September 2015 Robert Tidman & Co. Steam Organ EnginePART 3
Flywheel Ø300 x 35 wide Fig 5 David Owen 6 spokes constructs a small, full 60 45 size engine from the days of the steam fair. 20 Ø20 60 Continued from p.225 Ø20 M.E. 4514, 7 August 2015
12.5
Reduced with keyway & Crank webs tight fit & drilled for retaining bolt drilled & pinned The completed Robert Tidman & Co. organ engine. 400 Crank
They say that every journey starts with the first step and my first step on making this Robert Tidman & Co organ steam engine was a failed attempt to buy a set of beam engine castings on eBay! The Tidman engine, despite being full size, was quite small at around 30 inches tall and, having a 12 inch flywheel, it was just within the 14 inch swing of my lathe. I also liked it as it appeared quite simple and therefore, hopefully, within my limited capabilities!
The crank Photographs 39, 40 and 41 The crank (fig 5) was made show the manufacture of the from 20mm silver steel bar crank webs. Initially I bought and the webs attached. and used roll pins to secure the webs but, as I was later advised this was not good 39 practice, I changed them for 6mm silver steel pins which were filed flush before I removed the part between the web plates (photos 41 to 45). For the bearings, I purchased some Oilite bushes and turned brass bar for the housings. The housings on the original engine were square and rather than buy 2 inch square solid brass and cut it, I thought it Starting to make the crank webs. easier to buy 2 x 1 inch, join >> www.model-engineer.co.uk 363 40 41 42
Milling the crank web material to size. The completed crank webs. The crank webs fitted to the crankshaft.
it together for manufacture 43 44 and then separate again once milled and drilled to size. I cut the bar into 2 inch lengths (photo 46) and Superglued the halves together which held long enough to measure the centre accurately and then mount in my four jaw chuck (photo 47). I drilled the pieces with a 25mm bit before using a boring bar to enlarge to the 26mm of the bushes and cut a rebate to 33mm to Another view of the crank with crank pin fitted. 6mm silver steel pins proved a better choice. take the flange of the bush. Then the block was reversed to taper one face as per the 45 46 original (photo 48). I drilled the bearing housings on the 5 base and fitted some ⁄16 UNC studs, then made some plates to tighten down the top half of the bearing holders. Because each bearing was slightly different, I used an automatic centre punch to put witness marks on all the parts to show correct orientation etc. To mount the connecting rod to the crank, I fabricated a The pins filed flush. Brass bar stock for the bearing housings. block in two halves and then
47 48 49
Bearing housing in the lathe. The slight taper is included as per the original. The phosphor bronze big end bearing bush can just be seen.
364 Model Engineer 4 September 2015 TIDMAN ENGINE
drilled a suitable size hole the crosshead sliding nicely and then sharply hit it with a was then drilled so that the for a split phosphor bronze I put it in place, turned a rod hammer to give me a clear piston rod could be attached bush. This was attached to which was the same size mark as to where the centre (photo 59). the crank and holes marked as the piston rod to a point should be. The crosshead ●To be continued. to drill though the base of the connecting rod (photo 49). 50 51 The crosshead The crosshead came next. It needed another phosphor bronze bush which, as the central hole was square, I fi led until it was a good interference fi t and then pressed it home before drilling for the cross shaft (photos 50 and 51). At this stage the crosshead was much bigger A phosphor bronze bush in the crosshead. The partially completed crosshead. than the gap between the slideways so I milled it to nearer the correct size then 52 53 put the A-frame fl at on my mill to cut the slideway beds to size (photo 52). I then drilled the central hole in the A-frame that the piston rod would later pass though (photo 53). I milled the hole to get a fl at base, so that it could later be sealed with graphite, and drilled and tapped two holes for studs to mount a gland (photos 54 to 58). Once I had Milling the slipways to size. Drilling the piston rod’s hole in the frame.
54 55 56
Material shaped for the glands. The gland fl ange drilled. Drilling the piston rod gland hole.
57 58 59
The piston rod gland nearing Tapping the gland holes. The crosshead now in position. completion. www.model-engineer.co.uk 365 Louisa
Alan Green meets the challenges of his third Hunslet.
ar from the limelight than the large Quarry engines Standing on the real and outside public but all run on 5 inch gauge footplate reveals the maker’s Fawareness the little rails, all are fun to steam and intention to ensure that a Hunslet workhorses grew in each competent passenger goodly mess coming from numbers and variants without haulers if required. the chimney blackened the celebration. Today they are Louisa is a readily familiar driver’s face. By some cruel cherished by the modeller in member of the Hunslet clan, quirk of fate the scale of the every size and gauge. yet she is much older (1877) model in conjunction with Readers may remember my and smaller than my two a raised 5 inch gauge track Tale of two Hunslets featured of the earlier article. It has achieves the same object! It in Model Engineer a couple been interesting to note the proves the theory that drivers of years ago (issue 4462, progression to the larger of steam engines express their 9 August 2013), together engines and often a headache satisfaction through a dirty- with some superheater to resolve diffi culties. For faced smile. measurements and tests. example the smokebox door Louisa is a good deal smaller is a simple fl at (?) plate. One Design, draw and make wonders whether the real one Having designed, drawn ever sealed properly. However, and made two Large Quarry for the model a good deal engines I found that much of ingenuity was required to of the earlier design work accommodate all the usual was applicable and many equipment inside such a drawings could be classed as small smokebox. The guiding modifi cations. Nevertheless principles have been ready Louisa provided her fair share access and easy dismantling. of challenges. In an age What is more, Louisa sports embracing CNC machining two superheater fl ues – purists and 3D printing I wonder please look the other way! just what advantage most
366 Model Engineer 4 September 2015 HISTORIC LOCOMOTIVES
model engineers gain. My milling machine has DRO and I know how to measure. When setting the valves to agree with simulation the valve travel clocked within 0.002 inch. Maybe somebody could calculate just how many coordinates are involved from frame and reverser to valve gear and cylinders. Most of the valve gear had been designed for the larger engines. Louisa was fi tted with a poor set of Stephenson’s gear with rather hopeless suspension. I suppose that at mainly walking pace it matters little, except that a mindset which accepts rubbish, when the accuracy doesn’t matter, is unlikely to know how to get it right when circumstances demand it. It is suffi cient to record that all the working features on the model Louisa are fi t for the tasks expected on the track, where she will be working hard. There are no castings used and even the prominent cylinders are machined from the solid. Drawing on the success of my Quarry engines those long restricted passageways of the original have been roughly halved by locating the port face close to the inside of the mainframes. The different springing arrangement caused a shift in the valve gear driveline from ahead of the cylinder to behind, though none of this is apparent from the outside. Tolerances are quite close, particularly as the ports and valves of the model are somewhat nearer to 20th Standing on the real footplate reveals the maker’s intention to ensure Century practice. It may be worth stating that the worst that a goodly mess coming from the chimney blackened the driver’s face. feature of old Stephenson’s valve gears is the suspension By some cruel quirk of fate the scale of the model in conjunction of the links, otherwise there has been no necessity to with a raised 5 inch gauge track achieves the same object! change or develop the gear since its inception. The rather typical Hunslet development transition from The absence of running worries about starving one side manifold contains a safety the older haystack fi reboxes. plates, as seen in the pictures, at the expense of the other. valve, whistle, regulator and Proportionally it appears to is authentic; the problem of The comprehensive just about everything except function extremely well. The hiding a decent lubricator process of ‘design, draw and the gauge glass! This type saddle tank is of less capacity reservoir is not. At this stage make’ provides the range of of boiler, with a grate wider than my bigger Hunslets, but Louisa has run-in on a diet of challenges enjoyed by the than it is long, proves an I am hoping to judge the fi ne oily air for several hours. When author and the whole project excellent steam raiser. In dividing line between capacity lubrication is transferred to its has given considerable shape it is somewhat of a and insulation from the boiler. twin pump system there are no pleasure. ME www.model-engineer.co.uk 367 A Boiler Making Aid
his simple to make tool has proved its worth Ted Jolliffe 1 Tseveral times in the describes a making of copper boilers. simple little The example illustrated was tool to ease made to fit a particular size of the fitting of tube, but the principle can be boiler tubes. applied to many other sizes with equal success. One of the often repeated pieces of advice given to makers of copper boilers is to make some provision for ensuring that while the major silver-soldering operations are A close-up of the threaded end of a cycle spoke. Note that the rolled, as in progress the tube nest does opposed to cut, thread is slightly larger in diameter than the parent metal. The not fall into the firebox. Such spoke is from a wartime ARP cycle and shows considerable signs of distress. an event can lead, at the worst to spoiled work, and at best engagement. Again, normal amount of tube to protrude at to unsuitable use of workshop threading operations involving either end, if required, so that Esperanto. screw cutting, or use of a scour problems are lessened One method sometimes die removed metal at what is and tube life is extended due advocated is to skim a few potentially the weakest point. to the time it would take to thou off the end of the tube There is one other method, erode away the end before any to make it a close fit into used in industrial practice but lasting harm occurs at the tube the tubeplate. The ridge left never, as far as I am aware, in plate joints. being considered sufficient to our sort of operation - that of prevent calamity. This always thread rolling, where the thread Making the tool seems to be a method inviting is formed by deformation of The tool described was made 3 later troubles. The tube end the metal by forming rolls. to work with ⁄8 inch nominal is already in danger of scour No metal is removed but the diameter tube but sizes can be from hot ash being drawn into tooling for carrying this out for varied to suit the job in hand and along it while in operation. a ‘one-off’ operation would (photo 2). Therefore no sizes Removal of even a few thou be fairly complex and time are given; the construction tends to decrease the life of consuming to make. (If you can be seen from the photos the tube, there being less want to know what a rolled and any tricky bits are all I metal to be scoured away. thread is like have a look at the shall describe. Apart from Another recommendation is end of a spoke for a bicycle the ball bearing everything to thread the end of the tube wheel (photo 1); note that the is mild steel. Just to give an and plate, providing a positive thread is slightly oversize to the indication, the square bar 5 spoke diameter, as a result of used here was ⁄16 x 3½ inches the rolling process). There is a long. It is worth taking a bit of 2 major drawback to using this trouble to ensure that the two method on our comparatively pieces are of equal length. weak and thin walled tubes; Because it was to hand I 5 there are some quite hefty used a ⁄32 inch diameter ball pressures involved and so bearing from my ‘odd stock’ the tube would need to be jar. (Odd stock is a magnetic supported on a mandrel while ball where I am unsure of its the rolling process was under origin; it does not pay to use way. It was used to some a hardened steel ball that extent in full size. I recall during will rust in a clack, injector or a visit to Buxton seeing tubes similar location). being screwed into a main line Decide on which will be the locomotive boiler. Sadly I have ball holding piece and scribe an These are the components of the tool, together with a piece of forgotten the name. accurate centreline along the tube used for testing the result. Apart from the hardened ball the This little tool will solve the top of that piece. Mark out and remainder is all from mild steel. problem, and allow a preset centre pop for the two support
368 Model Engineer 4 September 2015 MODEL MAKER’S TOOLING
pegs. Now add together the at this rough and ready way of thickness of the tube plate, plus working but it has not failed me 3 4 the amount of tube end you yet. Now use a drill the same want to protrude plus half the size as the diameter of the ball diameter of the ball. When you and enter it into the small pilot come to turn the end, this is the hole until the merest whisker of point where the residual collar a fl at is shown in the hole. By left after turning acts a stop so a fl at I mean the full diameter that each tube is dimpled in the of the drill, as opposed to the same place. point. A dab of thick grease will Settle on the size of pins you hold your ball in position in the will use and drill though the embryo socket. Now carefully top and three quarters of the squeeze the ball into the pip way into the bottom with a drill already formed to give a nice suitable for a press fi t. (You rounded socket, which should A close up view of the fi nal end shape The detent, or socket, which will can cheat, drill to size and use be just under the half depth of of the inserted ball end of the tool. receive the metal to form the dimple. a cyanoacrylate adhesive to the ball. If all is right you will just The centre drilled hole together with Note the witness of the small drilled fi x them in the base). Enlarge see the witness of the point of the small hole drilled for the marking hole which set up the alignment and the two through holes to a the pilot drill at the base of the position serves to permit any excess the tiny fl at left by the full diameter of nice slide fi t for the pins and socket. That side is complete. cyano to escape. the drill while forming the recess. press the pins into place in Now take the other section the part drilled piece. They and mount it to run truly in the Follow the same procedure ball and slightly up each side should be long enough that four jaw chuck, with the pilot as before to make the dimple, until it does. ‘Cut and try’ is they do not protrude through hole end protruding. Turn it ensuring that you do this on the method here. If the end of the top member when both to the inside diameter of the the face, which has the through the tool will enter the hole in are in contact. Now with the tube you are using so that the holes for the pegs. Next, after the tube freely you are about de-greasing the ball, use a right. Remember that there good dab of cyano and press will be a slight distortion of the This little tool will solve the problem, and allow a preset the ball into the formed dimple. end of the tube when forming Wipe away any surplus which the dimple and allow for that amount of tube to protrude at either end, if required, emerges through the holes. before trying the tool. Leave to cure overnight. For The fi nal job is a bit of so that scour problems are lessened and tube life is light jobs like this I use a simple turning. As the dimple spring clothes peg to keep a is formed, the end of the extended due to the time it would take to erode away. moderate pressure on the joint tube will be slightly distorted while curing takes place - belt out of round. A simple taper and braces maybe but it keeps drift inserted and tapped in two pieces accurately located diameter is a nice slide fi t into me happy. will soon restore roundness together, using a very small the tube. (Make sure that there Once cured, if you are without over stretching the drill, go through from the top are no internal burrs on the tube correct, the ball should slide tube. If you have any doubts to half your ball diameter into end to give you a false reading). snugly into the socket when make a simple ring gauge - a the bottom bar. This sets the Before removing from the the tool is assembled. Of grand title for a piece of steel position of the ball and gives lathe, pop in a centre using course the end will no longer - with a suitable hole which an accurate indication to place your smallest centre drill - this fi t into the tube so to make a matches the outside diameter the socket. I do not recall ever is just to give any excess fi t it is necessary to fi le away of the tube (photos 6 and seeing a mention of this easy cyano an escape route later. from the opposite side to the 7). Tap the drift into the end way to preset the depth of the hole. Set the measurement on a Vernier, or if not super 5 6 critical, one of those cheap slide gauges sold for DIY jobs. With the drill bit in place lower it so it touches lightly on the top of the work. Use the pointed ends of the Vernier under the depth stop nuts and bring them down to lightly bear on the higher jaw (photo 5). Lock them off at that point and The two halves of the tool, showing the you have a preset depth. Even use of the small hole to give accurate if you have to change drills it is alignment of top and bottom forming easy to keep the stop in place members. The pegs held all steady and slide the drill up or down in while the small hole was placed. the chuck so that the point just touches the work, then lock it With the drill point touching the centre pop on the work piece the pre-set slide gauge is positioned off. Purists will doubtless scoff between the stop and the adjusting nuts, which are tightened down onto the gauge to set the depth of cut. >> www.model-engineer.co.uk 369 7 8
Not massive but enough for its purpose, the dimple formed in the test piece of tube. A later version of the tool was made (and given away) that allowed the dimple to be raised further back into the tube.
9
The taper is tapped into the end of the tube until the gauging ring is a snug The forming operation under way, using the vice as the press. fit on the outer wall of the tub, ensuring that when it comes to assembly, On annealed copper only a very light pressure is needed. the tube ends will fit through the prepared holes in the tubeplate. of the tube and keep trying the bench vice. The pressure the gauge; when you have a needed to form the dimple 10 ‘touch’ fit without shake you is surprisingly little - a nip of have achieved all you need. A the vice is all that is needed. short taper like this can easily Remove the dimpled end from be turned by angling over the the tool, restore it to round topslide of the lathe. Go for using the drift, make sure it a good finish and, to make is clean and carry on until easing out simple, make your you have done all the tubes taper quite a gentle one. (photos 8 and 9). This is not an exposition on Using the tool boiler making so it is left to you Simplicity itself! Slip the two to continue the work. I only square bars together over their hope that this little gadget will pegs, enter the rounded end assist in making the boiler a into the tube and lower into success. ME Taper drift and gauging ring.
A final word of warning 11 Many years ago I undertook to make a load of bits for the new track we were installing at Chingford MEC. This entailed pressing some 2500 components. I did the job in the bench vice quite successfully but a couple of weeks later, when tightening the vice on a job, the moving jaw broke off at the end of the slide. I am convinced that the strains incurred in the press work were sufficient to weaken the cast iron at that point. For some reason the broken vice was retained and emerged from under the bench recently, as a reminder not to abuse even such robust equipment as this (photo 11). My apologies for there not being a series of pictures of the operations described; I made this tool some 30 years back and rough sketches in the shop notebook are my only reminders of the methods used (digital cameras had not then come into general usage). I should add that the tool has been used as a pattern in the construction of A warning, this vice was used as a press too often and eventually broke several boilers over the years, even used on larger tubes, under the strain. It was kept on the grounds that the iron may come in and they have given every satisfaction. handy - after some 14 years repose I begin to wonder!
370 Model Engineer 4 September 2015 Martin Ranson, an award winning maker of steam launches, turns to locomotive building.
Continued from p.221 M.E. 4514, 7 August 2015
PART 6 Cylinder port block Photographs 41 and 42 and fig 27 illustrate this item. In A 16mm Locomotive the spares box was a length of brass bar with a nominal 3 size of ¾ x ⁄8 inch. This was for a Novice Engineer an ideal shape to use for the Idris original two cylinder port A suggestion was made to me, at a Model Engineer Exhibition some time ago, that after about blocks. I know this engine 50 years of building steam boats it was time I considered building something different and now only has a single cylinder but the method which was that I might try a small locomotive. After some considerable thought was given to moving into used for two cylinders is what was, for me, new territory, Idris came into being. My hope is that this article will provide very easy to use and makes some inspiration to my fellow ‘beginner’ locomotive builders. drilling the long holes for the
0.375 0.571
Fig 27 0.24 0.29 0.24 Min. 0.343
3/16 x 40
Ø3/32 clear 3/16 x 40 .206 1
6 Tap 8BA 0.7 0.6
Tap 10BA
0.27 0.755 2 long connecting holes drill Ø0.088 for depth of 0.35 Port Blocks then drill Ø0.075 for total depth of 1.10. Tap 6BA for depth of 0.35. >>
www.model-engineer.co.uk 371 3 ⁄32 inch and position the port force fit into the end of the 44 block over it using a piece of cylinder bore. Some people rod or use the back end of may prefer to soft solder each 3 a ⁄32 drill bit. The mounting end into place or use Loctite holes can be used to spot or Hermetite gasket sealer, 3 through onto the brass plate or even to use a ⁄8 x 40 TPI and then drilled clearance for model engineer size thread 8BA (photo 41). The method for the cylinder top end. The used to align the block was top cylinder cover would be 5 to place lengths of ⁄16 and ½ threaded to match. This is then inch bar alongside it and make soft soldered onto the base sure these were parallel to the piece which swivels across edges of the plate. Please note the port block. My hope is that that the four short holes for the engine should last quite the port steam passages are a few years before any work deliberately not yet drilled. is needed on the piston or cylinder bore (figs 28 and 29). Cylinder The piston rod is threaded Machining the port block. Photograph 40 showed the two 7BA each end onto a length of 1 original cylinders, one with its ⁄8 inch stainless steel. 7BA can 3 steam and exhaust passages people may, perhaps, prefer piston and end cap removed be tapped onto ⁄32 diameter easier to line up. The two to make the entire length and the other assembled. rod but the resulting thread 9 un-drilled port blocks were simply ¼ or ⁄32 inch thick; it The construction used for will need to be reduced with soft soldered together and would be easier to simply drill the cylinders came mainly a file or machined back down 3 the ends squared up using a short hole for each steam down to a choice of what was to ⁄32 diameter. There would a four jaw self centring or pipe to be soft soldered into available; remember it is now not be much left of the thread. four jaw independent chuck. (carefully). My first idea was only a single cylinder engine. However, if any 2.5mm stainless The combined piece of metal to make union connections so One method would have been is available this could be used 1 is easier to hold and stand the pipes would be removable to use a piece of brass or instead of ⁄8 inch diameter. This upright in a drilling machine, if needed in the future. It gunmetal large enough to have would produce a better match the spare block would then be may be considered to be an removable cylinder ends held for the 7BA thread (diameter is the part clamped in the vice unnecessary complication on with 10BA bolts - it takes a nominal 0.098 inch) and one as necessary. The bearing pin but it is ideal for any more initial work but, for any end of the threaded rod should hole and the long holes for experimenting. Photograph subsequent dismantling, it is pass through the lower cylinder the steam passages can be 44 shows the block mounted much easier. On this engine cover without too much bother. drilled into one of the blocks. in a small vertical slide fitted the cylinder end is a tight Any filing required would be This also shows the screws onto the lathe carriage so the that were cut down and used surplus metal can be removed for blanking plugs in the end with an end mill.
of the block. They can be Most of my marking out is 76 1/4 sq. 25 Ø0.456 Ø0.325 held in place with a dab of done by hand so when the 0.24 brass Ø0.25 Ø0.1 soft solder, sealing compound engine parts are assembled Ø0.1 or Loctite. Note these plugs they will generally only fit must not be too long or they in one position. I therefore Recess will block the holes supplying mark each piece on an inside steam. The screws were 6 surface with a number or letter. 0.08 0.1 Ø0.141 BA brass, cheesehead with a The port block was soldered 0.085 0.08 0.25 thread length of 0.125 inch. onto a piece of brass for 0.25 0.227 The threaded holes to connect mounting in the vertical slide. 1.461 the steam pipes can also be After it had been machined, 1.08 drilled and tapped (photo 42). the block was wiped clean Cylinder Do not drill the holes too close of any soft solder, a sheet of Piston thickness Ø0.25, bore Ø0.325. Nom. spare travel each end 0.034, piston stroke 0.56. Cyl. ports nom. Ø0.07, both ends together, otherwise the union 800 grade emery was laid of piston rod threaded 7BA nuts cannot be fitted and out on a flat board and the tightened. The two blocks can soldered surface rubbed clean Two ports be separated by melting the to gently get back to a brass Ø0.07 Tap 7BA solder, after all the operations colour. Photograph 39 shows on one of the blocks are the blank brass plates used 87 completed. Please remember for mounting the port block, 0.1 to clean out any swarf from the obviously too large and not 1.09 various passages. shaped or drilled. When the My method for shaping the holes for the crankshaft are port block meant the top of marked the centres distance 3 the block was ⁄8 inch thick and for the port block needs to 0.516 Cylinder Base the bottom end was reduced be 1.65 inch to the rear of Soft soldered to cylinder Fig 28 down to 0.270 inch. Some the crankshaft. Drill this hole
372 Model Engineer 4 September 2015 16mm LOCOMOTIVE
an absolute minimum. One 1 advantage of using ⁄8 inch rod Nom. distance between Ports final dia. 0.07 Nom. distance between is that it produces a step to bearing pin & 4 ports 0.446 Start at 0.055 edges of ports 0.084 hold the piston centralised; Drill in at 10˚ angle obviously the piston and rod Crank pin are clamped up hard to each Ø0.141 other. Photograph 45 shows the assembled cylinder with Crankshaft its block, bush and spring Ø0.155 to join to the crank pin and photo 46 shows the cylinder assembled just as it came off Stroke 0.56 Throw 0.28 the bench. Every piece of swarf Brass screws Cylinder bearing was removed as thoroughly 6BA x 0.125 Ø3/32 clear as possible with compressed cheesehead air and by fl ooding it with oil. I Centres distance 1.65 exactly usually use Black Molyslip and Ports Layout keep a pile of old dusters ready Fig 29 to catch any spray. The engine turned over very smoothly after oiling and swilling out any fi nal bits of swarf. No apologies 45 46 for repeating this cleanliness regime, in fact all the various pipes, valves, lubricator and boiler need to be as clean as possible when they are eventually connected together. One method to remove swarf from a short, internally threaded piece is to use a cotton bud which has been dipped in oil, or twist up a paper tissue into a long spiral. ●To be continued. The completed cylinder. First run on compressed air.
● Leyland’s 60th Anniversary Celebrations
● Taming a Drilling Machine Vice
● Mastiff Plus
MICHIGAN ● Two Unifl ow Engines (Son of Thomas Telford) ● Saunderson & Mills A 5 inch gauge American outline locomotive designed by the Bristol Tractor in 3 in. scale SMEE - an ideal Club Locomotive
www.model-engineer.co.ukON SALE 18 SEPTEMBER 2015 373 LBSC Rose Bowl Competition 2014
he Curly Bowl - or the LBSC Rose Bowl - is Steve Eaton Tawarded annually to writes about celebrate the continuing last year’s popularity of the locomotive event at designs of LBSC and to Leyland. acknowledge the ever-lasting high regard with which his pioneering work is held. The Leyland Society of Model Please come and join Engineers hosted this iconic us for this year’s event event last year at their superb track in Worden Park. This is which it to be held at possibly the longest track that the Chesterfield Model this event has ever been held Engineering Club on on so it was a good test for the Sunday 13th September; LBSC designed locomotives. Jason Pattinson’s Pamela. The weather was looking fine Run 1 come and see what it’s for most of the day and with First to be judged was a Pamela entered by Jason Pattinson. all about! five entries in total; one 2½ The late Eric Mills built the locomotive in the 1950s. Eric inch and four 3½ inch gauge was an experimenter and many of his ideas are present in engines all was set for a 10 this nicely made Pamela, all aiding drivability and efficiency. o’clock start. These include variable blast, push-pull injector valves and This year guest judge balanced water valve. Jason purchased the engine and he and previous winner Adrian has repainted the locomotive and had many hours of pleasure Hinchcliffe joined us. from her. The engine steamed very well and all the judges had a chance to drive it, a nice run on the long Leyland track. It would Run 2 take a longer test to get used to, and try, all of Eric’s blobs and The Heilan Lassie is a popular design from the LBSC gadgets fitted to this engine, nevertheless she ran very well. collection; they generally tend to run well and make a good, Jason was left to have a run on the track while run number powerful track engine. This particular example was entered two was under scrutiny. by Steve Higham and Josh Gannon and has a multi-cultural Jason was awarded second place. history. It was built in Rhodesia in the 1950s then came to the UK in the 90s and in 2010 it was rebuilt to its present outline with new cab, superstructure, tender bogies and extra detail added. The locomotive was fitted with Auto drains and the double blast pipe and then painted black, indeed she was one of the first black Heilan Lassies seen in this competition but it did look well in it. Pressure was gained in no time on this large boiler engine and she was soon on the track being driven by Josh before each judge had their turn. It’s a long reach to the controls for a 3½ inch engine but the cut-out cab and LBSC backhead made an easy drive for every one. Second Judge, Mike Law looked quite at home on this one as he has just finished a Heilan Lassie with his dad, Ivan. (I wonder if his will finish up black!)
The black Heilan Lassie with Josh Gannon and Steve Higham.
374 Model Engineer 4 September 2015 LBSC TROPHY
Run 3 Next to get up steam was Ben Pavier who is no stranger to competitions. This time he entered his 3½ inch Maisie - the fi rst of two in this year’s event. The locomotive was started by John Bailey and was about 50% complete when Ben acquired it in 2005. Over the next couple of years Ben built a non combustion chambered boiler, completed the plate work and tender and got her into running condition. Fitted with a hand pump, injector and axle pump she was a nice, pure example of the design. It was in steam in no time and soon on the track. Maisies always seem to run well and this was One of two Maisies; this one is Ben Pavier’s winning entry. no exception. We all had a drive with no problems romping round the long track, the locomotive was well behaved with little attention to the fi re required during a lap. Ben received a well-deserved fi rst place and the LBSC trophy. Run 4 The second of the two Maisies was entered by Norman Almond, another supporter of this event although usually with 2½ inch gauge locomotives. Norman Acquired this engine, which was built some time in the 1980s, with the intention of cannibalising it to fi nish one that he had already started but in the end decided to rebuild it. He fi tted new wheels, axles, axleboxes and rods and rounded it off with a superb paint job, done with a brush! Steam was raised very quickly and went from 50 to 90 lbs/ sq. in. in the blink of an eye. Once on the track there was very little between the two Maisies. In the end there was only a few marks to split them.
The second Maisie entered by Norman Almond. Chris Almond’s Dyak Queen. Run 5 The last run of the day was Norman’s son, Chris Almond. Fairly new to the hobby this was Chris’ fi rst event and he entered a 2½ inch gauge Dyak which will soon be 80 years old. Chris purchased the engine from Dave Ilett in Feb 2014. The Dyak Queen was started in 1934 and completed in 1941 by the late Mr. E. G. Ilett (Dave’s dad), this being around the time that it was fi rst published. Dave could remember seeing his dad making the engine and in 1979 he refurbished the engine. The engine number relates to the year started and the year its fi rst build was completed. It is basically built to the drawings so has no lagging as standard but it has been fi tted with automatic drain cocks, O-ring block connector for water connections and is also weighted for better adhesion. Chris The winner, Ben has repositioned the bypass and extended the reverser to Pavier with his make driving more comfortable. splendid trophy. The Leyland ‘mainline’ track no longer has a 2½ inch rail but there was a small stretch of up and down where we could try the locomotive; not an ideal test as it was quite steep but the little engine managed to get all the judges and Chris to the bottom and back. It had amazing grip for such a small engine. Well Done Ben! Thank you to the Leyland club for hosting this superb event and supplying food and drinks to Decision time everyone, all day long. Thank After all the runs the judges The prizes, courtesy of you to all the competitors retired for their deliberation on the Model Engineer, were for entering and letting the the prize winner. It was a hard awarded by last year’s judges try their locomotives. one as usual and no more than winner, John Barr and I hope the competitors and fi ve marks separated fi rst and the LBSC Rose Bowl was spectators enjoyed it as much fi fth but we had a winner in presented to Ben to keep for as we did. The legacy of LBSC Ben Pavier. the year. lives on. ME www.model-engineer.co.uk 375 A Major 1 Goes to
France The prototype Major was displayed to the public amid Coronation celebrations.
At the traditional meal know that Niall understands may be that other machines quality. If he had taken the are in existence and Bill would Ray Griffin following our annual visit to the Model Engineering trouble to purchase the mill welcome contact with owners transports and put it in store for many not on his list. Exhibition at Alexandra a versatile years, perhaps for his own My next reference (ref 2) is machine of Palace in January 2014, use in the future, it was a Lathes. This encyclopaedic quality to his Niall and I were talking machine of excellence. Before source of information on home near St. Tropez. about milling machines. I the decision was taken for lathes and milling machines mentioned that the time had me to become the new owner gives a valuable description come for me to acquire a and move the machine to of the specifications of the my workshop in the South Haighton milling machine. Of machine more capable than of France, we decided particular interest on this site my old EMCO FB2. that I should look into the are photographs comparing specifications of the Haighton the Haighton HSU1 with the Major HSU1 milling machine Hardinge UM. A further useful The idea evolves and confirm that it would suit source of information is the The EMCO had served my purposes. Niall pointed me Yahoo Hardinge users group well for many years as my in the direction of some useful (ref 3); here information is indispensable milling and and informative websites for freely exchanged. This group drilling tool. I had made several this machine. is particularly useful due to models from the Stuart steam The first (ref 1) and most the similarities between the engine range, including the useful was that of Bill Todd. Haighton and Hardinge mills. double Victoria, and had Bill is passionate about the completed my version of all the Haighton range of machine The Haighton Major model machines in the Stuart tools and his internet site is HSU1 milling machine workshop series. The EMCO is a mine of information in this The Haighton Major, an accurate, versatile and easy area. He provides photos manufactured from to use machine. However, I did of his research into the approximately 1953 until 1958, feel that a heavier machine, history of Richard Haighton was essentially a copy of the able to undertake larger work, Ltd. Engineers, of Canning well-regarded Hardinge TM/ would be useful. During our Street, Burnley, England. He UM precision universal milling review of milling machines also shows many detailed machines. The machine was seen at the show, Niall said photographs of his restoration intended to fill a particular to me, ‘why not take over work on a Haighton HSU1 niche in the market. There the Major’? This immediately milling machine and Haighton was nothing comparable with sparked my interest. Cadet Lathes. He is very its combination of quality, I knew that some years approachable and has been size and capacity available earlier he had saved a milling a great help to me in getting at that time from a British machine from a potentially mine going. Fifty milling manufacturer. ‘Tom Senior ignominious end when the machines were made by offered a range of useful engineering workshop of Haighton’s in the 1950s until machines but none had a his Faculty at Southampton the precision production vertical head that could match University was closed. At that department was closed in the versatility of that fitted to time, I did not know much 1958. Bill maintains a list of the Haighton. Machines from about this machine but did the six known survivors. It Centec were well made but
376 Model Engineer 4 September 2015 WORKSHOP MACHINERY
much smaller (until the advent, standards, now adopted uses a splined and universally- 165, 225, 340, 600, 905, 1230 too late in the day, of the 2C), internationally, but also for jointed shaft, driven by V-belt and 1850 rpm. A large bevel while those from Adcock the insight he brought to the from a rearwards extension to gear is attached to the mandrel and Shipley, a market leader, behaviour of machine tools the countershaft that carries to drive the vertical head, were either geared towards under load.’ a four step pulley. The shaft is giving speeds at the quill of production, too large or, again, The main column is of connected to a cast-steel box, double those of the mandrel. lacked a suitable head (as did substantial construction and mounted under the table at its My machine is equipped those from Victoria/Elliott). The sits on an octagonal base right-hand end, fi tted with a with a taper to take 5C collets 3 only opposition would have constructed from welded ⁄16 two start worm gear running in (an INT30 taper was fi tted come from Alexander with their inch steel plate. There are two an oil bath, with engagement to later models), the spindle direct copy of the early Deckel cast aluminium doors in the by a swing lever. Of course, also has a 2.25 inch x 10 FP1 Universal’ (ref 2). During base, one on the left-hand side as spindle speeds increase, tpi threaded nose. It runs in the celebrations in Burnley provides access to the drive, so does the table feed; the grease-lubricated Timken for the coronation of Queen the other, at the front, covers drawback to not employing a taper-roller bearings fi tted with Elizabeth II on the 2nd of June, a small storage compartment. separate motor. labyrinth seals capped by cast 1953, the prototype Major Gussets in each bottom corner Power is supplied by a aluminium covers at both ends. was displayed to the public are fi tted with tapped holes for heavily-built Brooke two What the selling price was is mounted on a Haighton lorry levelling screws. speed, three phase motor unknown but it may well have (photo 1). This photograph The table feed screws run (mounted on a hinged plate equalled that asked for the was kindly supplied to Bill through needle roller bearings within the stand), running at contemporary Schaublin 11A Todd by Kathleen Haighton, in their end support plates and 1480/740 rpm and producing at around £450 - then the price a direct descendant of have a ball-bearing to take 2.0/1.0 HP. A fi ve way rotary of a decent semi-detached Richard Haighton, founder of thrust behind each hand wheel lever switch, mounted on the house (ref 2). Haighton’s Ltd. The end support plates were left-hand side of the column, ‘The machine was hand scraped fl at, as were all is used to select the speed, Planning the move manufactured entirely in-house, the slide ways. My machine direction, and stop/start. Drive I told Niall that I would be with the castings coming from number 0012 still shows is by Vee belts and a simple delighted to become the new the company’s own foundry much evidence of the hand countershaft arrangement, with owner of the Major and we and even the gears being cut scraping work. The nuts are a single A-section belt from the started to plan the move. The on the premises. Reports from in bronze and of the ‘double’ motor running over a four step dimensions of the machine an ex-employee note that each type - adjustable to remove pulley to drive an intermediate can be seen in fi g 1 , which machine was hand-fi nished backlash - and all horizontal shaft; with a triple A-section is a copy of the original and took many months to slides have proper, tapered belts driving the spindle. The specifi cations leafl et. The complete’ (ref 2). gib strips. The knee gib is a resulting speed range for the machine with accessories The Major is a true universal double tapered wedge block mandrel covers a useful 110, weighs approximately 500Kg milling machine: equipped with with push-screw adjustment. a 6.5 x 26 inch power feed The hand wheels have a sliding table that can be swung 45 sleeve that acts as a simple Fig 1 degrees each side of central. dog clutch to allow the handles There is a 2 inch diameter to be disconnected (for safety) over-arm and cast-iron drop when power feeds are being bracket, supporting the 1 inch used. The micrometre dials are in diameter horizontal milling 3 inches in diameter; crisply arbour and a quill-feed vertical engraved and locked by head with both fi ne and rapid knurled rings that act along the drill-actions. The machines axis of the screw, preventing were constructed to a very any setting error as they are high quality and were fi nished locked or unlocked. to Schlesinger’s limits which The heavily-built knee is are described in his book, raised and lowered by a hand Testing Machine Tools. Not wheel whose shaft runs in being an engineer myself, I am needle roller bearings with, at not competent to comment on each end, a ball-bearing race this topic. However, Tubal Cain, to take thrust. The elevation in Model Engineer of 4 October screw which runs through 1996, vol 177, issue 4026, a bronze nut is fi tted with a page 397, paid the following steel grease seal. It has a 5 tpi tribute to Dr. Schlesinger: ‘It left-hand acme thread and is is no exaggeration to say that supported by a deep-groove Dr. Schlesinger had a greater thrust bearing on the bottom. infl uence on the design and Four rates of automatic table performance of machine tools feed are provided 0.001 inch, than any other man since the 0.003 inch, 0.005 inch and days of Whitworth, Maudslay 0.007 inch per revolution of and, perhaps, Holtzapffel. the spindle. A knock-off table Not only for his inspection feed is provided. The system >> www.model-engineer.co.uk 377 and moving an item such at the barn where the Major as this needs thorough and was stored. The team of 2 careful preparation. Niall, Richard, Jonathan and We decided to move it I arrived early in the morning. in one piece. It would have The flat, hard surface required been possible to strip the mill by the lorry and pallet lift was into more easily managed approximately 50 metres away individual parts but I wanted from the place where the to maintain everything in place machine was stored. The route until I was more familiar with was along a strip of grass that the assembly. My first thought was reasonably flat; though was to hire a vehicle with a there were a few undulations. tail lift, drive through France, There were problems: we cross the channel by ferry; needed to turn a corner and load up, then return home. along one side there was a The mill was stored in the drop of approximately one proximity of Southampton metre. The storage space so the ferry to Portsmouth was dry, the machine was would have been appropriate. covered in plastic sheet and The total cost of this means all working surfaces coated of transport turned out to be with a protective wax. The first incredibly high for a one off thing was to move the Major job such as this. Niall found a out into the open. We had pallet transporter that would four 1 inch diameter x 1 metre collect a loaded pallet from long steel pipes as rollers. A the Southampton end and long crowbar was inserted deliver it to my address north under the base of the machine of St. Tropez for £225. The and a roller inserted. When conditions were a pallet of 1 two rollers were in place the The mill starts its journey across grass to the road. metre square and a weight machine was pushed forwards limit of 1000Kg so our load and as one roller came out at progressed surprisingly easily; hollow. The 500Kg of machine, was well within limits. This the rear another was inserted swapping rollers and moving balanced on rollers, overcame was very reasonable and we at the front. Once free of the the sheets from one end to the our efforts to manage chose the option. restricted space in the store other. movement, and gravity took Arrangements were in place (photo 2) we were able to In one brief moment possession. We suddenly by the month of May and the use two substantial 2 x 3 we nearly lost control. came face to face with the pallet, holding straps and metre sheets of plywood to Unexpectedly, one corner of a difficulty of regaining control covering materials assembled traverse the grassy route. This sheet dropped into a shallow on a rolling surface. We had made provision and one of the crew was ready with a wooden 3 4 wedge to arrest movement. This worked well but made us very wary of further depressions in the ground. The traverse to the pallet went surprisingly quickly. We did not have lifting tackle so the machine was pushed on the rollers up an incline made from a piece of steel plate resting on the ground and top edge of the pallet. It sounds more difficult than it was. It was a case of pushing a small distance up the ramp and putting in a wedge to stop rollback. Gathering breath for another push followed by wedging. The machine was soon on the top of the pallet. It was eased into the centre with a crowbar, levering against the slats in the pallet. The machine was secured Preparing for shipping, the mill was secured Industrial strength cling film encapsulates the machine. to the pallet with coach bolts with ratchet straps. passing through the holes
378 Model Engineer 4 September 2015 WORKSHOP MACHINERY
for the levelling screws in the base and holes drilled in the Fig 2 wood of the pallet. There was room in the cabinet for the vertical head and overarm of the horizontal arbour with lots of packing. Extra security was achieved with ratchet straps passing through the pallet and the secure points at the top of the machine. The Major has the benefi t of a swivelling table and we turned it to maximum to reduce the overall width. A metal tool box containing accessories was also strapped to the front of the pallet. The whole machine was then covered in industrial strength cling fi lm and then covered with a plastic sheet (photos 3 next morning a van arrived; and 4). We were happy that it reversed up to the workshop 5 was ready for travel. The lorry door and wheeled the pallet arrived on the following day and into place. The moral of this the Major was off to France. story is to make sure that transporters are made aware of Receiving the Major access at the start. A few days after my return Unpacking was exciting; home there was a phone there was no damage and call to say that the delivery everything was as it had left the would be made the next day. UK. At fi rst sight the prospect I had cleared a space in the of removing the pallet was workshop for the machine to daunting. My assistants were in pass on the pallet lift. The next the UK and I needed something morning there was a phone to lift the machine. There are a call from the driver. He was at number of engine hoists on the the top of our road and could I market and I decided to buy walk up to take a look. I should one. The specifi cations need explain that our house is at careful consideration; maximum the end of a short road on an weight cannot be lifted at the incline. I walked to the top to maximum extension of the fi nd a lorry of the dimensions lifting arm. There are also two normally seen on motor ways stabilising legs that protrude and a very apologetic driver. from the front and the width He could go no further with the of these varies from make to lorry and given the weight of make. I decided on the 2 Ton the machine his pallet lift would hoist from SGS Engineering run out of control on the slope. Ltd. (ref 3). This is a sturdy He explained that they would hoist, and can lift ½ ton at have to return another day in a maximum extension of the arm, smaller vehicle with a tail lift. 1 ton at half extension and 2 There then followed much tons retracted. There is a gap The two ton hoist made light work of the lifting. delay. Our French transporters of 940mm (fi g 2 ) between the were trying to establish the protruding legs at the front. lever in the slats in the pallet. wheeled away and placed on logistics of the new delivery This tapers to 450mm and is The hole for the overarm the fl oor. It later became clear with the UK contactor. A not suffi cient to admit a 1 metre passing through the top of the that the SGS hoist had been a stalemate ensued, only pallet far enough to place the column was used for lifting. I really good decision. It is well resolved by my visiting the lifting chain over the centre of was reluctant to use the shaft of made (in the UK) and of heavy transport depot close to the mill. However, I could see the overarm in case it became duty construction. Toulon. The staff of the French that if I moved the mill to the damaged. I used a length of I placed the Major in its offi ce were very sympathetic front corner of the pallet and 1 inch diameter steel bar and chosen spot and then realised and immediately arranged, cut away redundant wood, the chains looped around the hook that this was not practical. at their expense, to deliver hook of the hoist would reach (photo 5). When the time came, The overarm protruded from the machine the next day in the centre of the machine. I was astonished at the ease of the rear and the controls were a small van with a tail lift. You The machine slid nicely into the lift. With a few pumps the not easy to reach. The hoist can imagine my relief when the position on the wood, using a mill was raised from the pallet, was called into service to lift >> www.model-engineer.co.uk 379 the machine and move it to that time, my workshop had a am aware of the dangers of easily and can be made to the an ideal working space. The single phase supply from our three phase electricity and correct size. hoist was then used to lift a house. My Myford Super 7 am confident that my system The machine is now working heavy pillar drill from the floor Connoisseur lathe is equipped is safe. Rules governing the well and is a joy to use. onto a workbench as part of with a three phase motor installation of electrical circuits the workshop rearrangement. and an electronic variable vary from country to country Was it worth the effort? When not in use, the folded speed inverter that operates and should be taken into The answer is an unqualified hoist takes little space and from the single phase supply. account. YES! Until the Major arrived in will be a boon for lifting in the Fortunately, we have a three With the electrical supply in my workshop I had been used future. phase electrical supply to place it was time to connect to the small EMCO for milling Cleaning the Major after the house so it was a case of the machine and turn it on. which, although accurate, its many years of idleness taking the other two phases It was very satisfying to hear needs careful attention to required a good supply of through underground cables to the motor hum and see the speed and depth of cut to white spirit, fine wire wool, the workshop. mandrel turning. One or two avoid a poor finish. The kitchen roll and disposable There is no earth connection problems with the drive belts Major was a revelation to me, rubber gloves. The wax provided by the electricity soon became apparent: the especially on the value of the coating had done its job well supplier. It is the responsibility belt from the motor to the heavier build. It is accurate and and the working surfaces were of the consumer to provide countershaft was replaced takes heavy cuts in its stride. soon restored to a shiny new a suitable earth. When the as it was stiff and worn. It It is also very versatile and appearance. The paintwork house was built the original proved difficult to find a local can be used as a horizontal was surprisingly good for a owners formed the house source of belts so I turned to milling machine, vertical milling machine that has now past earth with a large copper the Internet and found exactly machine and almost like a its 50th Birthday. I am happy plate buried deep below the what I needed through a vertical lathe with the work with the paintwork and will foundations, connected to UK company called Bearing held in a collet in the mandrel not attempt restoration. Bill the house wiring by a large Boys (ref 4). Another problem and a tool post bolted to the Todd shows a machine on diameter copper wire. The materialised when I tried to use table. Photograph 7 shows his website that has been earth wire in the workshop the power drive to the table. this lathe-like function - used restored and repainted to an is a continuation of the earth The driving belt for this is taken to bore a collet in situ. The enviable finish. in the house. I decided to from the mandrel and was horizontal arbour had been lost Once the machine was add another earth outside slipping due to old age and over the years and I needed to cleaned, greased and oiled the workshop to increase there is no system to increase make a replacement, using a it was time to provide the security. This takes the form of the tension. To change this purchased collet as a base. electrical supply. The motor on a 2 metre length of earth rod belt would have meant a It is fortunate that six my machine requires a three driven into the garden outside complete dismantling of the survivors from the original phase electrical supply. At the door to the workshop. I mandrel which I was reluctant batch of 50 of these superb to undertake. The solution was machines made in Burnley to use jointed belting, also in the 1950s are listed on 6 available from Bearing Boys. Bill’s website. Perhaps there This is purchased as a length are others just waiting to be of plastic links which join found. ME
REFERENCES 1. http://wktodd.webspace.virginmedia.com/ 2. http://www.lathes.co.uk/ 3. http://www.sgs-engineering.com/ 4. http://www.bearingboys.co.uk/
7
The Major settled in its new home in France. Demonstrating one function of this versatile machine.
380 Model Engineer 4 September 2015 The 50th Astle Park Rally
he first Chelford Traction Engine Rally I attended Diane 1 Twas probably 1968, so Carney not quite the first one, but I attends a only recall missing one since favourite then and that was due to going traction to Somerset to collect our engine rally at Chelford, Sentinel waggon the year we purchased it. Every New Year, Cheshire. as we open up a new calendar, the second weekend in August is circled in red. Astle Park! As a family we spend quite a lot of our summer weekends attending various rallies in the North West; some are old, established events and there are always one or two new gatherings springing up but from the point of view of an exhibitor, each has its own good points and its foibles. Ask anyone who attends regularly, however, and they will tell you there’s something about Astle Park that gives it the edge over all the rest. It has its own Burrell single crank compound (SCC) Stanley Monarch on the left and Foster, unique atmosphere, which can Winnie on the right. Both attended the first rally in 1966. be put down to many things but the beautiful parkland infancy, there had been several Of the four men mentioned, setting is probably one of the small events in the South only Bill Briggs of the original contributing factors. It’s been Cheshire and North Midlands committee is still with us and the traditional meeting place areas for two or three years, he was in attendance with for the many engine owners, yet there was a significant his Wallis & Steevens traction drivers and families in this area number of traction engines in engine. Two of the original ever since its inception and for preservation in the north of the committee’s engines were most, of course, it’s a highlight county and, these being the present (photo 1); Burrell SCC, of the social calendar. This days before low-loaders were Stanley Monarch of 1900, year was also blessed with in common use, it was thought No. 2336, which was owned perfect rally weather too. that there was a need for an by Alan Barber and is now This short report focuses on event within a day’s travelling in the care of his grandson, the full size traction engines, time. Four local gentlemen of Adrian (who was instrumental of course, but there were the preservation movement - in organising this year’s countless other exhibits Alan Barber, George Lea, Jim special celebrations) and to look at. There is always Dakin and Bill Briggs - got Foster general purpose engine a huge section of vintage together to devise a plan to put Winnie, Works No. 12539 commercial vehicles, military on an event in their own neck of 1910, then owned by Jim vehicles, vintage and classic of the woods, to which they Dakin of Goostrey, now owned cars (270 in the programme!) would invite all the local engine by Frank Lythgoe of Lymm and and motorbikes and there owners. Their first approach presently in the care of, and were about 20 miniature was to the Lower Withington presented by, Phil Moston who traction engines. Village Hall Committee who was also engine steward this had had some involvement year. Early days with similar events down the It was good to see a number The first rally was held in 1966 road at Jodrell Bank. They of other engines that had also and came about due to a need were happy to assist and the attended the first rally in 1966. to fill something of a gap in group looked at hiring Astle Photograph 2 is of Burrell the region. Although traction Park, a local and ideal location Devonshire Engine No. 2950, engine rallies were in their in many ways. Little Mac owned by David >> www.model-engineer.co.uk 381 2 3
Burrell SCC Devonshire, Little Mac has, as far as I recall, attended every Chelford Traction Engine Rally.
4 Another Cheshire engine all its days, King George V dates from 1912 and was originally owned by local threshing contractors, Barlows of High Legh.
invited to provide an extra attraction this year. Les Searl and his team had steamed three road locomotives on the road from their home in Sussex; McLaren No. 1652, Sentinel Super No. 5558 is named Maggie May. This waggon worked hauling loads for Criddles in Liverpool Boadicea of 1919, Burrell No. and has been in the ownership of the Clarke family throughout its days of ‘retirement’. 3829 His Majesty of 1920 and Fowler No. 8920 The Dale of Scholar Green, Staffs same family, Barlows of High Sentinel waggon that had Great North of 1901 (photo and has been in the same Legh near Warrington, since attended in 1966 came just a 5). These three, together with family for well over 50 years. its working days and is today few miles from Macclesfield five local engines, performed Foden traction engine No. owned and rallied by Chris (photo 4). This Super Sentinel a fantastic demonstration 2654, King George V (photo Barlow. In addition to these dates from 1924, is works No. of heavy haulage for the 3) has, again, been in the general purpose engines, a 5558 and has been a regular enjoyment of the crowds on attender over the years. Saturday afternoon as the McLaren pulled what probably 5 50 years on amounted to about 100 tons Well over 50 engines attended of ‘dead’ weight several times the rally this year, all of which around the arena. The real contributed to the huge ‘fireworks’ were due to start success of the event. The at nightfall - but this certainly programme showed 54 made a thunderous precursor! engines booked in, most of There was an example of which were local to the area most types of road steam and and a large proportion of a representative of most makes which travelled to the event on the field. I shall let the rest under their own steam. (I of the photographs (photos 6 believe this is another factor to 14) and their captions tell that contributes to the special the story but close by saying atmosphere at Chelford - the that if ever you find yourselves Three visitors from Sussex; the Searl family’s magnificent road locomotives had steady arrival of engines on in the Cheshire area in early arrived under their own steam having visited the Welland rally in late July and the Friday afternoon.) As part August, make this rally one of now bound for the Great Dorset Steam Fair. From left to right: Burrell No. 3829 of the special celebrations, your destinations as it really is, His Majesty of 1920, Fowler No. 8920 The Great North of 1901 and McLaren however, three visitors from and always has been, one of No. 1652, Boadicea of 1919. the South of England had been the best. ME
382 Model Engineer 4 September 2015 STEAM RALLY REVIEW
Fowler roller, works No. 16436 of 1925 is owned 6 7 by Richard Fairhurst of Worsley, Manchester. Richard has gone to great lengths to acquire and fi t authentic tar spraying gear to the roller, thus presenting it as it would have been in its working days. Early Saturday morning was warm, still and beautiful as the crews of Foden No. 2104, Propspector and Fowler No. 15653, Renown polish the lamps.
8 9 Will Dakin from Sandbach brought along two examples of Davey Paxman’s portable engines. On the left is his beautifully restored engine No. 15584, Little Sheila of A few minutes later and both engines are a hive of activity. 1910 and on the right, running like a sewing Will Dakin’s machine but not as yet 10 traction engine cosmetically restored is is on the right in a 1905 example, works this photo; a 1911 No. 12729. Davey Paxman No. 14829, Little Audrey and on 11 the left a 1926 Fowler No. 9187 Lady Carrick. Both superb examples of single cylinder, general purpose traction engines.
Another very genuine showman’s engine and 12 Another unusual make in the form of a Tasker tractor, No. 1424 and owner Mike Priestner from named Will O’ the Wisp is on the right here. The present owner is John Dunham Massey was just McDonald-Smith of Knutsford, some four miles distant. Next to it is about to put the belt on 1925 Burrell compound roller Pride of Somerset - Somerset being its Fowler SRL No. 14682 home county where it spent its working life. This roller has been rallied Evening Star ready for a by Richard Bridge and his late father, Arthur, for many years. day’s generating. In my view this engine is probably very representative of how 14 these engines looked in their working days - mechanically sound and not overly shiny!
A second 13 demonstration of heavy haulage took place on Sunday afternoon as Fowler No. 12906 Foremost pulled Renown, Prospector and Evening Star Fowler No. 16519 was purchased by a young Sam Bozson of Dunham Massey - roughly a 50 ton a couple of years ago. Sam was brought up with engines and now keeps this load - around the lovely little Fowler Bonzo (named after his late granddad) immaculate. I have arena. never seen such a neat pile of ashes on a Saturday morning! www.model-engineer.co.uk 383 Heavy Duty Duty Heavy An Easy toMake 384 equipment. a usefulpieceofworkshop through theconstructionof Harprit Sandhu Myford S7noseshown by appro This holeneedstoclearthespindle oftheindexer General 0.090 x. 0.03in,itisfortheboltthatloc guidesus 1 Arrangement, Ele .250 2.250 1 4.609 2.875 .250 1 .750 1
4.250 2.500 v ation 8. 000 ks thespindleinplace 5.500 1. 12 a part thatis8incheslongand5indiameter betweena part centres. directly onthemillingmachinetableanditisconvenient to have the 5 This isasubstantialbuteasy to make indexer thatcanaccommodate machine oradrillpress. The headstock andtailstock canbeused 2.500 The headstock canbeusedasastandaloneindexer onamilling substantial basefor any numberof otherindexing operations. 1 Indexer .750 indexer. The fi nished 6.375 1 0.1 0.625 .50 1. 25 12 0 Model Engineer 5 Looking attheheadstoc End S make). A No. 2 Morse taper is make). ANo.2Morsetaperis noses wouldbeeasyenoughto inch Myford S7lathe.(Other matches thenoseona3.5 discretion oftheuser. could easilybeaddedatthe holes; additionalholecircles plate describedhas60and40 home workshop.Thedividing it foreasiermanufacture inthe S7 shaperbutIhavesimplifi ed Atlas asanaccessoryfortheir similar tothatprovided by of shapers.Thisindexeris machines tookoverthework world war, before milling before andafterthesecond the spindle can support all the the spindlecansupportall provided inthespindleso that The indexer’s spindlenose capacity Ø5.5in nominal Vi ew lathe manufacturers provided byshaperand imilar Indexerswere 6.0 4September 2015 00 k Fig 1 Ø1 .750 WORKSHOP PROJECT
collets, chucks and tooling that Welding fl ow into the joints and the rolled plates may warp when can be used on the lathe. Work Though a skilled welder can parts cannot move while we a cut is taken off one surface. can be moved from the lathe use a small (home workshop) do the soldering. (This is not a problem with to the indexer, and back to the wire welder to build up the Large pieces like this need hot rolled materials.) For this lathe while still in the chuck it kind of work we need done lots of heat to get all parts up reason it might be necessary was turned in, thus preserving it is much easier done with to temperature at the same to machine each side twice, the inherent accuracy. The head a large commercial welder. If time and lots of fl ux to make once before and once after of the indexer can be used as a we prepare the parts properly, sure that the joints will be the warping. Annealing before stand alone device for dividing the welding itself can be done clean. Do not skimp on heat, machining will help and can operations on all chuck and in a few minutes. Preparation the fl ux or the silver solder. be done by placing the base collet held parts. consists of making sure that Make space for the silver in a barbecue cooker for half All the work involved can the parts fi t together and solder by creating three small an hour and turning the gas be done on a drill press, a stay in position during the bumps on each soldered fl ame up as high as it will go small vertical milling machine welding process. It includes surface with a chisel. These or getting a good bed of red and a 5 inch (10 inch in US) chamfering appropriate bumps should be about 0.005 hot briquettes going before lathe. The work could be done locations so that the welding inches high to keep the parts putting the base directly on without the milling machine materials can penetrate the from coming together tight. them. Not elegant but it will but it is much easier if a mill is parts the way we need them Position the parts together work on most cookers. Allow available. The base is one part to, to make strong joints. We with pins and mechanic’s wire parts to cool slowly overnight that may require commercial are doing some heavy welding to hold everything together. with the cooker cover down. machining assistance because on small parts so expect some 0.500 inch long pins made of (Low carbon steel needs to of its size. warping. Most of the warp on 0.125 inch brass rod placed be heated to above 400F to Figure 1 provides the the 0.625 inch materials that in 0.125+ inch holes work well anneal it. The hotter the better.) general arrangement. form the bases/feet can be and are easy to install. Use two Photograph 2 shows an taken out with a large hammer pins at each joint. Use a short early trial assembly to provide Materials list before we begin machining. piece or 0.125 inch silver steel a mental picture of the space The following materials are Those welds that will be with a pointed end to transfer available between the chuck needed to make the indexer: covered up with other pieces hole locations to matching and the tailstock. will need to be cleaned up faces. (A third hole can be used • 1 Base - plate or bar stocks. (splatter and weld removed) for triangulation if necessary.) Cutting the Tee slots • 1 Head stock - plate or bar before the other pieces are Since steel tends to corrode The Tee-slots (visible in the stocks. added to make sure that they on cooling it will be best if each photo of the fi nished indexer) 3 • Tailstock - plate or bar will fi t tight to the assembly - assembly can be soldered are best cut by fi rst taking ⁄8 stocks. meaning that two trips to the in one operation. This can inch wide cuts down each side (The bar stock sizes needed welder may be necessary if we be done if the assembly is and then opening them up with are listed on the drawings.) don’t want the welder to do the positioned such that it can be a Tee-slot cutter. The bolts for 3 • Head stock Spindle - 1.5 inch cleaning up. heated and then the solder fed these slots will be ⁄8 inch in round by 6 inches long. On this project 0.187 to to it without having to move it. diameter. The trick to making 5 • Tail stock insert - ⁄8 x 3 0.250 inch chamfers will be these long cuts is to use inches silver steel. enough to allow strong and The Base compressed air at 5 to 10 psi 3 • Headstock lock - ⁄4 x 2 proper welds to be made. Figure 2 (overleaf) describes to keep the slot both in front of inch brass. Soft welding rod that can be the base and photo 1 shows and behind the cutter clean. If • Tailstock lock - ½ x 1.25 machined should be specifi ed. the fl ame cut material I used. this is not done the swarf gets inch brass. These parts have been cut caught in the cutter on both • Dividing plate - 5 x 5 by Silver-soldering from rather heavy steel plate sides and destroys the cutter 1 ⁄8 inch plate. The parts can also be stock. I am describing the rather rapidly. If you have • Bar stock for spindle pin silver soldered to make the indexer as made from standard suds equipment on the milling mounting - 1 x ¼ x 8 inches. assemblies. Again we have shapes welded together. machine the coolant can be • Spindle locking detent pin to make sure that the parts The drawings show how this used to keep the slots washed ¾ x 3 inch steel. fi t together properly; there is can be done from standard out. Use lots of coolant to • Fasteners allowance for the solder to shapes. Un-annealed cold fl ood the work. • Tee bolts and nuts, six - 3 ⁄8 x 2 inches. • Machine screws to hold 1 2 dividing plate - three 3 10-32 by ⁄8 inch long. • Set screw for spindle back 1 nut - 10-32 by ⁄8 inch long. • And miscellaneous odds and ends from the scrap bin.
Patterns may be made and castings used but for the purpose of this article we will assume that all parts will be fabricated. The base and fl ame cut head and tailstock blanks Establishing an idea of overall size. >> as received. www.model-engineer.co.uk 385 After the Tee-slots are complete, the slot tops can be Fig 2 cleaned up by taking a light cut 14.250 (0.010 inches) on either side of 2.250 10.250 3 each slot with the side of a ⁄8 inch milling cutter. If you are going to take a
cut on one of the longitudinal .750 sides for a reference surface, 1 that cut should be taken 00 before moving the plate off 0 6.0 the milling machine table so 2.50 that the reference surface will be exactly parallel to the Tee-slot you have just cut. This slot needs to be exactly at the centre of the base on the longitudinal axis. The cut Thickness of plate 1.25in has limited utility and I do not Internal and external radii 0 to .25in particularly recommend it. Cutting the alignment slots The Base, Flame Cut for the head and tail stocks on General notes each end too is optional. Each 1. For the flame cut parts, either hot rolled or cold rolled slot should be 0.250 inches materials may be used. wide (tight) and a bit more 2. For the fabrications, a low carbon, unalloyed steel like ASTM than 0.125 inch deep to easily 1018 is a good choice for ease of welding and for ease of accommodate half of a 0.250 machining. inch square key. The slots in the 3. The welds should be prepared with 1/4in chamfers to allow head and tail stocks will have a good deep weld to be created. This is important to creating a to be positioned to match these rigid indexer. slots so keep that in mind for the future. More on this later. 14.250 Clean up your work with a single cut file to remove all burrs 2.250 and imperfections. Wipe off the 1.750 coolant, oil the base to prevent .750 rusting and set it aside for now. Making the headstock 01 and the tailstock 2.50 Figure 3 describes the fabricated head and tailstock and fig 4 describes flame cut parts. The center height on both the headstock and the Components: 1.250 tailstock must be identical 14.00 x 1.75 x 1.25 two pcs so they need to be machined 2.50 x 1.75 x 1.25 Fabricated Base 2.50 x 2.25 x 1.25 on the same set-up, one
3 4
The tailstock and headstock bottoms being machined flat The head and tailstocks once their bases have been machined. prior to starting the other machining operations on them.
386 Model Engineer 4 September 2015 WORKSHOP PROJECT
right after the other. This will make sure that the centre Fig 3 height of the hole in both is at 2.000 exactly the same dimension. 2.875 0.500 1.500 But fi rst both parts need to 0.500 0.125 have the bottom mounting surfaces made fl at (photo
3) and at right angles to the 0.625 00 0.500 0 fi nished sides. This is best 2.0 accomplished by clamping each to an angle plate or in 3.50 0.500 the four jaw chuck and taking light cuts off the bottoms till 1.000 they have been cleaned up. 1.494 Before you start, compare 0.625 0.875 2.250 the two parts to see which 6.000 one will need more taken off. Machine that one fi rst and Fabricated Head Stock then machine the other to match. Mostly this is a check Components: to make sure that there will be 2.25 x 6.00 x .625 enough material removed from 2.25 x 2.00 x .875 the base of each piece so that 2.00 x 2.00 x 2.875 1.750 1.00 x .500 x 1.50 a workable solution results. Photograph 4 shows the 0.750 headstock and tailstock placed 1.000 on the milling machine table to 2.000 make a rough check that will ensure that they will be in line 0.625 once the machining has been 0.625 2.375 2.375 .875 .875 1 completed. 1 Once the bases of the parts have been made fl at, clean them up with a fi le to remove all burrs. Study the work to 6.000 determine what the exact Components: 1.750 center height of the indexer 6.00 x 1.75 x 0.625 will have to be. Write it down. 1.875 x 0.75 x 0.50 We will be working to this Fabricated Tail Stock 2.375 x 1.75 x 1.00 dimension for the cross holes. ●To be continued.
Fig 4
15.6° r1.000 r0.500 3.000 3.000
1.466 2.000
0.625
.875 r0.394 .875 1 r0.250 .875 1 0.625 1 .494 1
r0.250 r0.250
r0.250
6.000 6.000
Head Stock, Flame Cut Tail Stock, Flame Cut Thickness of plate 2.875in Thickness of plate 1.5in
www.model-engineer.co.uk 387 Patriotism PART 12 The Royal Army Ordnance Corps
Following the successful Alan introduction of the Royal Crossfield Scots in 1927, the LMS describes locomotive department his much turned its attention to admired, improving the Claughtons. DOE winning Patriot This latter class of in 5 inch gauge. locomotives consisted of one hundred and thirty
Continued from p.247 LNWR designed 4-6-0s. M.E. 4514, 7 August 2015 Since their introduction in 1912, the Claughtons had been the flagship express passenger locomotive of the ‘Premier Line’ and, until the introduction of the Royal Scots, used on the fastest and heaviest trains. The author’s 5 inch gauge locomotive
appearance of the model in on compressed air, which of Painting its unpainted state (photos course had necessitated some Warm dry conditions are the 163 and 164). The very next lubrication of the moving parts. ones most sought after for this day I started to dismantle the Components thought to be type of job and the summer of locomotive in preparation for at risk from oil contamination 2013 provided just what was the first stage in the painting were subjected to submersion needed. June 9th was the date process – degreasing. in a suitable solvent. I have set for the annual LMS Rally Although the locomotive at found one of the most effective at Worden Park Leyland and this stage had yet to be track products for this purpose to this was to be the last public tested, the chassis had run be cellulose thinners. One The completed locomotive... 163
388 Model Engineer 4 September 2015 LOCOMOTIVE MODELLING
drawback is that it can be quite costly especially in the 164 quantity required to degrease a large locomotive. A more sensible option appeared in the form of ‘gun wash’, a low grade of cellulose thinners, more suited to the bathing of components and where a good deal of loss would be inevitable. Several litres were acquired from HMG Paints of Manchester and a set of plastic tubs purchased from a local hardware store. Parts found too big for full submersion would have the solvent applied by brush (photo 165). A plastic tub and cheap paintbrush were the only tools required and because of the favourable weather conditions, I was able to continue the job outdoors where there were no issues concerning ventilation. After … seen unpainted for the last time in mid summer 2013. removal from the solvent, each part was left to dry in the sun. have remained, an undetected Large components such as threat with the potential to leach 165 the boiler, smokebox and cab, out and lift any subsequently thought not to have been in applied paint. contact with oil, were simply A similar procedure was given a wipe over with a used on the components of solvent impregnated cloth. the tender chassis, after which Photo 166 shows they were placed in a shallow components of the locomotive box until required (photo 167). chassis after degreasing. This picture also shows the set Mainframe plates were not of nut-runners used throughout separated from each other the period of the build and although individual cross- subsequent dismantling. Some stretchers were removed on are ‘off the peg’ commercial a ‘one at a time’ basis. Each tools but those for the smaller was inspected and several sized screw-heads (10 - 14BA) were found to have a fi lm of oil have been home-produced on the surface adjacent to the from cap-headed Allen screws. frame. Had I not removed these components, the oil fi lm would ●To be continued. Parts semi-submerged in solvent.
166 167
Showing the extent to which the chassis was disassembled. Tender components awaiting painting. www.model-engineer.co.uk 389 PART 17 Internal Combustion Theory and Practice
Ron Wright, a retired Fig 121 Coupling technical college teacher, Impellor shaft Turbine provides an in-depth course in I/C. Air in Continued from p.250 Exhaust gas out M.E. 4514, 7 August 2015
Air to cylinders Exhaust gas
Fuel injector
I’ve always thought that Fig 122 one of the most significant sayings in model engineering Air out to cylinders is that originated by the late L.B.S.C.; ‘you can’t scale nature’ and I’ve come to regard this as being of special importance in Exhaust the design, construction gas out Air in from and operation of small I/C atmosphere engines, where the working principles are exactly the same as those applying to full size engines. This forms the basis of this article which I hope will be useful and Exhaust informative to readers who gas in have a particular interest in I/C, especially those just starting out in our hobby.
390 Model Engineer 4 September 2015 UNDERSTANDING I/C
effi ciencies of gas fl ow at This obviously imposes Fig 123 all speeds, with no sudden very great centrifugal forces changes of direction and, as on the rotors which must Exhaust Air to engine gas in can be seen in this particular therefore be made as light as design, the inner leading edges possible and balanced with Casing of impellor blades are curved absolute precision and, for the in the direction of rotation same reason, rolling element in order to help ‘scoop’ air bearings are not ideally in axially along the central suitable for this duty owing to Air Exhaust inlet passage and then to the relatively large masses of inlet out propel it tangentially into the their rolling components. surrounding volute where it Instead the shaft is carried slows down and changes its in sleeve bearings, usually lead kinetic energy into pressure bronze, which are themselves Impellor which fl ows to the cylinders. able to rotate within the Turbine Bearings Similarly the turbine blade housing; the whole assembly leading and trailing edges are being fed with substantial Coupling shaft shaped so as to tangentially quantities of oil so that the shaft ‘cup’ the kinetic energy of the and sleeves actually fl oat on oil hot exhaust gas as it fl ows fi lms with no metallic contact. Turbocharging A fuel injected engine is inwardly from its volute to However ball bearings A turbocharger, or turbo- represented in fi g 121 having impinge against the blades suitable for turbocharger use supercharger, is a turbine an injector situated slightly which direct the gas towards are being developed (some driving a centrifugal upstream of each inlet valve. the hub and then axially out with ceramic balls) as they supercharger; a system For a carburetted engine the to the exhaust system, in the offer less rolling resistance whereby exhaust gas kinetic carb’, if located down stream of process converting the kinetic than plain bearings and hence energy, as it fl ows out of the impellor, has to be enclosed energy into torque which throttle lag, i.e. spooling up engine cylinders, is harnessed in a sealed air chamber (fi g rotates the impellor at high time when the throttle is to rotate a turbine wheel which 124) in order to ensure that the speed via the shaft. opened, can be reduced. is directly coupled by a short absolute pressures in the fl oat shaft to a centrifugal impellor chamber and venturi remain in Bearings Lubrication which induces atmospheric correct proportions with respect At fi rst sight a turbocharger A problem arises during the air and feeds it to the engine’s to each other at all speeds and appears to be very simple starting and stopping of inlet manifold. loads. in having only one moving engines when the oil supply is Figure 121 shows this in The rotating components assembly, but certain problems minimal. For example when the schematic form for a four are shown in fi g 125 which arise from the fact that the ignition is switched off the rotor cylinder engine and fi gs indicates that the blades are mass of air from the impellor may well be spinning at 20,000 122 and 123 show the basic profi led in such a way as varies as the square of its rev/min but the oil pressure assembly of a turbocharger. to obtain the best possible rotational speed, which in will be dropping towards zero. turn means that in order to Similarly when starting up the provide a substantial mass of rotor will immediately start to Fig 124 air at high engine speeds and spin before the oil pressure Air from turbocharger full throttle, the impellor must rises to normal leaving only rotate very fast indeed, often at boundary lubrication available over 100,000 rev/min. for bearing protection.
Fig 125 Exhaust KE
Sealed casing
Carburettor
Fuel in
Blade edges ‘cupped’ to receive kinetic energy (KE) from exhaust gas Mixture to inlet manifold Blade leading edges ‘scoop’ shaped to induce air axially
>> www.model-engineer.co.uk 391 Fig 126 Fig 127 Vane ends form To turbocharger narrow nozzles Latch Spring down compressed Stub shafts
Accumulator full
Valve open Normal Running
From oil pump A Exhaust gas stream aimed at outer tips Latch Spring of turbine blades down extended Vane ends opened to allow increased mass of gas to impinge fully Oil on blade radius feed
Piston travel limited Valve Closed Engine Stopped
Latch Spring fully up extended
B
full power, the rotor speed acceleration employ systems Valve may need to rise to well over Starting Closed of variable geometry to keep 100,000 rev/min in order to the rotor speed high when the supply full boost pressure. engine is on part throttle and Now, obviously, the rotor - therefore the exhaust mass no matter how small and light - flow minimal. One system designed to cure latch to hold the piston. In this cannot accelerate from 20,000 One of these arrangements this problem is shown in fig situation the cylinder retains rev/min to over 100,000 rev/ is shown in fig 127, A and B in 126, A, B and C. some oil and remains in a min instantaneously; it must which a ring of pivoting vanes This consists essentially of ‘standby’ mode with valve shut. take a few seconds which is located around the periphery a conventional oil pressure When the starter switch is means that a slight time lag of the turbine rotor and housed accumulator having a spring operated (6C), a solenoid (not must occur between pressing within the volute casing. The loaded piston fitted with a shown) is energised which lifts the pedal and obtaining full pivots consist of short stub latching device and a one the latch to free the piston rod crankshaft power, i.e. the shafts which protrude through way valve in the feed. During and allow the spring to push engine will not ‘pick up’ the casing wall to a simple ring normal running (6A) oil pressure the piston into the cylinder to immediately. mechanism by which all can feeds to the turbocharger and deliver oil to the turbocharger One way of minimising this be rotated in unison by some also fills the cylinder, thereby during the starting oil pressure problem is to employ two small form of servo device or stepper pushing the piston and rod fully rise phase. diameter rotors in parallel, i.e. motor. back with the latch down and two separate turbochargers At part throttle the vanes the valve open. Throttle lag instead of one. Large diameter are rotated (fig 127, A) so that When the ignition is switched Another problem arising from rotors having a correspondingly their inner ends partly close to off (6B) the spring pushes the inertia of the rotor is that large polar moment of inertia. form nozzles which direct the the piston into the cylinder to of throttle response time or Another good design feature low mass gas on to the outer pressurise the oil and close the throttle lag. is to position the turbocharger edges of the turbine blades. valve, thereby to feed oil to the When idling the rotors might as close as possible to the This increases the radius of turbocharger as it runs down. be revolving at say 20,000 exhaust manifold to minimise the tangential thrust applied This continues until the piston rev/min so if the throttle is the gas travel path. to the rotor to increase the rod end stop contacts the opened wide in a demand for Other ways of assisting rotor shaft torque and thereby its
392 Model Engineer 4 September 2015 UNDERSTANDING I/C
increased energy gained by Firstly the exhaust gas Fig 128 Exhaust in the molecules causes them to temperature of a Diesel engine To inlet manifold move with increased kinetic is considerably less than that energy; i.e. their temperature of a petrol engine owing to the increases and they try to push Diesel’s higher compression Exhaust themselves apart to reduce the ratio which raises the B.M.E.P. by-pass gas density. Just the opposite so that less fuel energy is of the exercise. wasted in the exhaust gas, If the heated air is allowed hence the turbine is not so into the cylinders, which in severely thermally stressed as effect form a closed container, it would be when coupled to a then the impellor will be petrol engine. Exhaust attempting to push air against Secondly a Diesel engine out the thermal activity of the has no throttle and induces air molecules and will hence be only, hence there are no gas unable to deliver full boost. fl ow restrictions to impair the Clearly the air needs to impellor performance. be cooled before it reaches And thirdly, a Diesel engine’s the cylinders to remove this power output is controlled by ‘obstruction’ and allow full the quantity fuel injected per rotational speed; there being away from the turbine rotor boost to be developed. One cycle. Consequently when the resistance from the impellor in response to a maximum system of doing this is shown pedal is pressed there is an which is not delivering large value of boost pressure being in fi g 129. immediate increase in the fuel masses of air. detected. delivery resulting in an almost Because of the increased Figure 128 shows a Diesel application instantaneous power response, rotational speed less time is wastegate in the open position, Turbochargers are now quite i.e. throttle lag is much less of required to accelerate the rotor it being a straightforward tulip popular for petrol engine a problem than it is in petrol to full speed and throttle lag is head valve which is normally car use but in fact they are engines. reduced. held closed by a spring. A better suited to Diesel engines At full throttle the vanes diaphragm connected to because:- ●To be continued. are shifted inwards (fi g 127, the valve stem and housed B) such that their inner ends within a sealed capsule, is in open up the gas passages to communication with the inlet Fig 129 A eliminate the restriction and manifold boost pressure and allow the gas to strike the rotor will push the valve open when blades across their whole radii. a pre-determined value is This increases the total thrust exceeded. B against the blades and drives C the turbine with suffi cient Altitude advantage power to provide full boost When employed on aero from the impellor. engines turbochargers gain Control of the vanes is by an advantage with increasing signals from the E.C.U., which altitude because atmospheric Fins is sensitive to engine speed, pressure reduces as the manifold pressure and throttle aircraft climbs. Cooling position etc. This means that the air flow pressure differential across Maximum boost pressure the turbine, i.e. between the There is no mechanical exhaust port and the exhaust connection between the engine pipe becomes proportionately crankshaft and the supercharger greater thereby enhancing the mechanism, unlike positively rotor riving torque. driven blowers. Hence the rotor speed is totally independent Charge cooling of engine speed and may The whole object of well rise to dangerously high supercharging is to force as levels which could result in many air molecules (oxygen Boost Air Cooler mechanical damage to the and nitrogen) as possible into Positioned in front of the normal engine radiator. rotor and detonation within engine cylinders during the the combustion chambers as induction strokes, regardless of The top tank is divided by a central baffle, ‘C’ on the diagram. a result of too high a boost engine type, which obviously Air from the impellor enters at pipe ‘A’ & flows down the right pressure. raises the pressure above hand side tubes to the bottom tank & up through the left hand This is prevented by the atmospheric. side tubes, losing heat as it goes. provision of a device known However, during the Finally the cooled air flows from pipe ‘B’ to the engine as a wastegate, which directs compression process inlet manifold some of the exhaust gas within the supercharger the www.model-engineer.co.uk 393 he quality of Sunday papers is not strained, 1 Tthey droppeth from the gentle letterbox, upon the doormat beneath. They are twice blessed, by him that readeth and him that recycleth. Give me excess of them, that I may laze about in bed and have a leisurely breakfast. At a recent amateur radio rally I bought two Light Emitting Diode arrays that I thought could be used for my solar-powered, basement emergency lighting system. The original home- Turbine Garratt by Peter Southworth at Sheffi eld SMEE. constructed panels are constantly on but the new I caught a fi ne bit of video noticeable (photo 1). Pete Nash Geoff panels load up the solar panel prompted by an item in Steam presided over a good collection Theasby quite heavily, so the system is Railway. 45699 Galatea, of stationary engines and here very vulnerable to fl uctuations with its train, going up Shap, he is fi ring up a hot air engine reports in the light intensity. Clouds immediately followed by 70000 (photo 2). That looks like a on the or trees between the Sun Britannia with its train, both on slight over-supply of ‘hot air’! latest and the panel cause wide screen together! At one point, W. www.sheffi eldsmee.co.uk news from the Clubs. variations in the light intensity. speed was down to 11 mph, so In writing to us promoting Also, connecting my multi- the sound track is wonderful. their Open Day on 12 range voltmeter across the Look on YouTube for ‘Galatea September, Chairman, Peter solar panel creates a crude on Shap’. The speed of Maybury of Bromsgrove form of light meter. Thus I can modern trains at this location is Society of Model Engineers tell the difference between about 100mph. inspired me - never being full sunlight, overcast sky, full In this issue: a turbine one to miss a chance - to moon, fi rst quarter etc., just by locomotive, valve gear, a request further information watching the meter. motorcycle, toast, trucks, a on the Society so he sent the I have occasionally referred breakdown, a target, a bar Spring and Summer editions to my other hobby of amateur stool and shrink wrapping. of Offcuts, the club newsletter. radio and if any readers are Henk-Jan de Ruiter writes, The Spring edition revealed interested, may I refer them regarding the Congreve rolling that much track work, GL to a well-produced series of ball clock in M.E. 4511, that and Garden Railway has items on YouTube called The the ball is missing. Well! A taken place over the winter. Tx Factor (Tx is amateur-speak ‘Not the Ball’ competition! I note that it is a condition of for Transmit). They cover many He is right. I presume it was membership that all members aspects of amateur radio removed in order to prevent it contribute to operations on activity today, each programme going missing in transit or at running days. Recommended lasts about 30 minutes and the show. He also suggested is this website: there are eight episodes to a drinks cabinet for the http://tinyurl.com/qfn8hoj date, with more to come. ‘Restaurant Car’ and I also The Summer issue reports a thought of cupholders. Thank visit to Statfold Barn Railway you, Henk. where it was noticed that the 2 On 5/6 July, Sheffi eld French, Corpet locomotive, Society of Model & Minas de Aller, with its unusual Experimental Engineers Brown valve gear, has been held their Open Weekend. A restored since their last visit. number of locomotives were in W. www.bromsgrove action including Alan Cooper’s sme.co.uk/ 7¼ inch gauge Darjeeling & Conrod, Summer, from Himalayan, recently featured in Bristol Society of Model M.E. Having ridden around the & Experimental Engineers track behind it, I found that it is reports that the Society has both powerful and accelerates bought a 3-D printer and has quickly. The late Peter already produced a number Southworth’s turbine Garratt, of whistles. Chairman, Derek restored and completed by Todman was pleased to Pete Nash generating rather too much Hot Air at Sheffi eld SSMEE. Jack Evans, was performing, learn of yet more expertise (Photo courtesy of Mick Savage.) the whine of the turbine very demonstrated by members
394 Model Engineer 4 September 2015 CLUB NEWS
at a recent On The Table evening. They have changed 3 coal supplier and this found universal approval from the locomotive drivers. One tonne of this has therefore been purchased. ‘Club Characters’ this time considered Mike Keighley. Joining the Fleet Air Arm at Lossiemouth, he found that one of the base helicopters was maintained by male mechanics and the other by females. The latter was by far the cleanest aircraft! Peter Wright researched the history of Fox Walker locomotives and the Nailsea coalmines. Our Cog is Bristol’s technical journal and the Spring issue displays Ian Glasspool’s 1:3.5 Ariel motorcycle. Yes, it’s a model! The fi rst of seven, it took Ian 18 months to build. The engine Ariel motorcycle by Ian Glasspool at Bristol SMEE. (Photo courtesy of Ian Glasspool.) is complete with internals but is not a working model Festival in an item written Rex was not an engineer but a Artex! - Geoff) then cover with (photo 3). Editor, Richard Lunn for Surrey Signal, from the Tax Inspector; you see, they are PVA adhesive. When nearly makes no apologies for noting G1MRA, Surrey Group. Steve normal after all! Young member dry, empty the vacuum cleaner various safety precautions in Webb describes a GWR Motor Joshua has produced a new, over it. Voila! A perfect industrial the workshop, stemming from Trailer/Autocoach built from compact locomotive known locomotive fi nish! a posed picture in the last scrap materials. (M.E. 4508). variously as the ‘Bar Stool’, W. www.cosme.org.uk edition. Having been trained Bob Ott explains renewable or ‘Mechanised Pogo Stick’. Warrington & District at Rolls Royce, he remembers energy sources. George It is quite powerful and easy Model Engineering Society’s the gruesome picture of a man Swallow was fi nally persuaded to alight or dismount from, an Daresbury Gazette has Editor, who was scalped whilst using a not to mend his 25-year-old attribute much favoured by the Duncan Webster marvelling lathe. Chris Castleman makes toaster yet again, having older members... (photo 4). Ian that most of the disparate brake blocks for his 9F. Hints on replaced the old springs with Varty visits the thorny subject of group of volunteers actually cleaning injectors are followed new ones, which proved rather locomotive liveries and thinks hold down responsible jobs in by a feature on tab and slot enthusiastic, needing quick he has the answer. Spray it with real life... fabrication of models and an reactions to catch the toast what is to hand (probably not W. www.wdmes.org.uk idea for drilling large holes in as it tried to achieve orbit but thin metal sheet. Kevin Slater to invest in a new one. All goes into steam oils and John those available seem very high 4 Whale improves the Winson tech but cannot cope with 14XX. Richard Lunn explains homemade bread cut with a the Hackworth valve gear. breadknife, only pre-sliced W. www.bristolmodel factory-produced ‘pap’ (my engineers.co.uk word - Geoff). Editor, Steve Newslink, Summer, from Webb lists some interesting Sutton Model Engineering websites, all except the club’s Club, covers their 80th own, which I had to look up... Exhibition and Anniversary. On W. www.suttonmec.org.uk the front cover is Mike Dean’s COSME Link, Summer, 5 inch gauge (William) Dean comes from Witney & West 2-4-0 which he has donated Oxfordshire Society of to the Small Relics Museum Model Engineers (as it was) at Didcot Railway Centre. City of Oxford Society of President, Derek Tidbury Model Engineers (as it is now) attended the second Exhibition which is celebrating 60 years in 1938 and many since. of operation. Joy wishes to Richard Hughes of Leeds, has relinquish the editorial eyeshade an O-Gauge Bassett-Lowke so a new incumbent is being Super Enterprise, a little-known sought. The late Rex Bateman Southern Railway locomotive. has bequeathed his model of Adrian Johnstone visited the Invicta to the Society. This was Royal Holloway 2015 Science built by W. Terrington-Hughes. Joshua’s ‘Bar Stool’ at City of Oxford SME. (Photo courtesy of Sam Weller.) >> www.model-engineer.co.uk 395 to Australia, driving and firing boilers, including the effect of 5 locomotives from a RSH- the brick arch, and covering built Pacific to a 2-6-2 tank the different fuels; meths, gas on the Puffing Billy Railway. and coal. At a recent meeting, ‘Wolverton Pug’ reports being a stranger appeared: “Hi, I’m shot at as his train travelled Colin, from Hereford”. Up jumps through Acton Yard. the President, “Hi, Colin, I’m W. www.rsme.co.uk Tom, from Leominster!” (13 B&DSME News, July, from miles apart back in UK). Tom Bournemouth & District also visited the North Borneo Society of Model Engineers Railway which is becoming an tells us that Roger Stewart- increasingly popular railway Hindley has had the cylinder on Sabah, using locomotives block for his LNER J39 built in 1955 by Vulcan in machined by a Weymouth Lancashire. The May Fun Day company as it is too big for his attracted 30 families visiting for Bob Devereux’ XT Rudyard Kipling at Bournemouth Myford. Chris Bracey writes on the first time, together with old &DSME. (Photo courtesy of Roger Stewart-Hindley.) recent activities at the track. friends paying repeat visits. The Bob Devereax brought his AMRA exhibition attracted 60 Ryedale Society of Model Also a book and DVD sale Indian railways XT Rudyard exhibitors and the club track Engineers reported an raised funds for the Glory Kipling (or, ‘Kippers’) not seen was much missed. Public and interesting day on 14 June School in Nepal, now getting for some months (photo 5). show organisers both requested when a Grandma visited back to normal after the W. www.littledown its return in future. An S Class courtesy of her family’s interest earthquake. £400 has been railway.co.uk 4-8-2 locomotive, plinthed at in vintage trucks. Some fine raised, not a lot to us but a Northern Districts Model East Perth since 1976, has been vehicles were on view. One of great deal in Nepali terms. Engineering Society (Perth) ‘shrink-wrapped’ following the the occupational hazards of Stockholes Farm Miniature (Western Australia) Steam discovery of crumbling asbestos public running is the occasional Railway says that on Easter Lines July/August says that on it. This will be removed by breakdown. When a bolt fell out Monday there were 34 work is about to start on the specialist contractors. S542 of the firebox door assembly members on duty, possibly cover for the patio area, now Bakewell is a 3 foot 6 inch on a Black 5, resulting in lack more than ever before, and that planning permission has gauge locomotive built in 1943 of steam, the passengers were they had 10 locomotives been granted by the City for WAGR. amused to be rescued by a running. Ivan had a good talk of Stirling council, and is W. www.ndmes.net B1. One group was almost to the builder of a Rhodesian intended for completion ready A recent flying visit to South convinced that a rescue crane Railways Garratt on display for the Sandgropers event in Yorkshire Transport Museum pulled by a radio controlled at Harrogate and is getting on November. It will be used for the revealed this huge model locomotive actually had a junior with his own LMS 4-6-2+2-6-4 evening meal and speeches. (about 12 feet long) of Britain’s member inside, driving it... model. The railway is in a good Extra lighting will also be last battleship, HMS Vanguard, W. www.rsme.org.uk condition for the Summer. installed in the station area built by one of the museum’s Coate Express, July, the W. www.sfmr.co.uk and outdoors. Marcus Jones founders (photo 6). newsletter of North Wilts Reading Society of Model in England found a steam rally And finally: you’re really an Model Engineering Society, Engineers sent me The to attend and also wangled engineer if... you go on a cruise reveals that John Spokes Prospectus for July. They a drive of Jaguar SS100 and so you have a personal tour of acquired a hot air engine in recently held a fun day for C-types to a charity function. the engine room. his youth, whilst working at over 100 of the Autistic Pride He says its not easy having photography company in group, attended by the Mayor, to ‘heel-and-toe’ a 1953 Le 1966, Johnsons of Hendon which is believed to be a First Mans winner through sleepy (now disappeared under Brent for the club. ‘61249’ covers villages, even if it is a replica! Cross shopping centre) and a fault caused by ‘CH’ being Jim Crawford continues on Contact: decided to restore it. This interpreted as ‘Case Hardened’ the combustion process in [email protected] was not a success and now, rather than ‘Cheese Head’, having discovered that it was which may have led to a by Marklin and dated about serious incident. A meeting 6 1910, he realises that it should of the Young Engineers was have been left well alone and delayed by the M4 being treasured! (Hmmm, I was closed in both directions. given an old plate camera and When they finally assembled, some plates to play with in the they were consulted about 1950s. What would they be the Polly locomotive colour worth now?) John also visited scheme. After the predictable the Buckinghamshire Railway ‘sky blue pink with yellow Centre at Quainton Road. The spots’ had been declined, 50th Anniversary celebrations Brunswick Green with black went very well with a goodly outside on the frames and turnout of models including red inside was decided upon. Ian Hand’s Showmans’ engine. Mike Burke writes on a visit Model of HMS Vanguard at South Yorkshire Transport Museum.
396 Model Engineer 4 September 2015 SEPTEMBER 6 Warrington DMES. 13 Harlington LS. 19 Chesterfield & District 4 Rochdale SMEE. Running day. Contact Public running and MES. Open Day (visitors Don Allen: Crime Really Duncan Webster: Exhibition, 2 - 5pm. welcome) with public Does Pay! Castleton 01925 262525. Contact Peter Tarrant: running at Hady Hill. Community Centre, 7pm. 6 York City & DSME. 01895 851168. Contact Mike Rhodes: Contact Len Uff: Running day. 13 Leeds SMEE. 01623 648676. 0161 928 5012. Contact Bob Polley: Public running at 19 North Wiltshire MES. 4 Romford MEC. 01653 618324. Eggborough Track, Play Day, visitors Competition night. 7 Lancaster & from 10am. Contact welcome but please 8.00pm. Contact Morecambe MES. Geoff Shackleton: contact Ken Parker: Colin Hunt: Informal meeting. 01977 798138. 07710 515507. 01708 709302. Contact Mike Glegg: 13 Sutton MEC. Sunday 20 Bedford MES. 5/6 Chesterfield & District 01995 606767. track day from noon. Contact Alan Beard: MES. Open Weekend Contact Jo Milan: 01234 301867. 7 Peterborough SME. - Extensive passenger 01737 352686. 20 Chichester DSME. Bits & pieces. carrying. Contact 13 Welling DMES. ‘Steam on Sunday’ Contact Terry Midgley: Mike Rhodes: Public Running 2 - 5pm. at the Blackberry Lane 01733 348385. 01623 648676. (Behind Falconwood Elec track. 2pm – 5pm. 5 South Cheshire MES. 9 High Wycombe MEC. Sub stn.). Contact Martin Contact Ben Ernshaw- Club Open Day. Mike Whitehouse: Thompson: Mansell: 01243 773451. Contact Stuart Daw: The Dambusters. 01689 851413. 20 Frimley & Ascot LC. 01782 767587. Contact Eric Stevens: 15 Chesterfield & District Special club running. 5 Tiverton & District 01494 438761.10 MES. Meeting with talk: Contact John Evans: MES. Running Day 9 St. Albans DMES. Club Footplate Experiences. 01276 34970. at Rackenford track. Night. Terry Wybrow: Contact Mike Rhodes: 20 Grimsby & Cleethorpes Contact Bob Evenett: Why I Love Trains. 01623 648676. MES. Public running, 01884 252691. Contact Roy Verden: 15 Lancaster & noon - 4pm. 6 Basingstoke DMES. 01923 220590.12 Morecambe MES. Waltham Windmill site. Public running at the 10 Sutton MEC. Bits & Members running Contact Dave Smith: Viables Craft Centre. pieces. Contact Jo Milan: afternoon. 01507 605901. Contact: Austin Lewis: 01737 352686. Contact Mike Glegg: 20 Guildford MES. 01256 764765. 12 Cardiff MES. Steam up/ 01995 606767. Charity Day Running. 6 Ellenroad Engine Family/ visiting engines 16 Leeds SMEE. Contact Mike Sleigh: House, Elizabethan day - no public running. Jack Salter: Battery [email protected] Way, Milnrow, Rochdale. Contact Rob Matthews: electric locos. Contact 20 Leeds SMEE. Engines in Steam, 11am Geoff Shackleton: Public running at - 4pm. Enquiries: 02920 255000. 01977 798138. Eggborough Track, 01706 881952. 12 Oxford (City of) SME. 16 Salisbury DMES. from 10am. Contact 6 Frimley & Ascot LC. Family Day at Natter night with Geoff Shackleton: Contact. Public running. the track. Contact: film show. Contact 01977 798138. Contact John Evans: [email protected] Jonathan Maxwell: 20 Oxford (City of) 01276 34970. 12 York City & DSME. 6 Grimsby & Cleethorpes Bits & pieces. 01722 320848. SME. Public running, MES. Public running, Contact Bob Polley: 17 East Somerset SMEE. Cutteslow Park. Contact: Steam up and Fish [email protected] noon - 4pm. Waltham 01653 618324. & Chips at the Club. 20 Plymouth MSLS. Public Windmill site. 12 SMEE. Polly Course Day Contact Roy Lipscombe: running at Goodwin Park. Contact Dave Smith: 4. Contact Allen Berman: 01761 414357. Contact Malcolm Preen: 01507 605901. 07954 175518. 17 Warrington DMES. 01752 778083. 6 Guildford MES. 13 Basingstoke DMES. Members’ running day/ Natter night. Contact 20 Rugby MES. Public Visitors’ Open Day. Duncan Webster: running at Rainsbrook Small engines group. Boiler certs req’d. Contact Mike Sleigh: 01925 262525. Valley Rly., 2 – 5pm. Contact: Austin Lewis: [email protected] 18-20 Lancaster & Contact Ken Eyre: 01256 764765. 6 Oxford (City of) Morecambe MES. 5 in. 01788 842709. 13 Bracknell Railway SME. Public running, ‘Scale Trains’ weekend. 20 Warrington DMES. Cutteslow Park. Contact: Society. Public running Contact Mike Glegg: Running day. Contact [email protected] at Jocks Lane, 01995 606767. Duncan Webster: 6 Plymouth MSLS. Public Bracknell, 2.30 - 5pm. 18 Rochdale SMEE. 01925 262525. running at Goodwin Park. Contact Paul Archer: General meeting, 20 West Huntspill MES. Contact Malcolm Preen: 07543 679256. Castleton Community Open Day from 10am. 01752 778083. 13 Grimsby & Cleethorpes Centre, 7pm. Contact Contact Geoff Stait: 6 Reading SME. Public MES. Public running, Len Uff: 0161 928 5012. 01278 794176 (eve). running in Prospect noon - 4pm. Waltham 18 Romford MEC. Caroline: 20 York City & DSME. Park, 1.30pm. Windmill site. Crossrail Presentation. Running day. Contact Peter Harrison: Contact Dave Smith: Contact Colin Hunt: Contact Bob Polley: 07920 833546. 01507 605901. 01708 709302. 01653 618324. www.model-engineer.co.uk 397 year 5 warrantywarraanty On ALL WABECO Machines
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