Fantastic new title from Fantastic new title from
Boiler (water inside)
Throttle (regulator) Steam line from boiler
Exhaust line from engine to stack
Steam chest (valve inside)
Cylinder (piston inside) Piston rod Drive rod
Reach rod to reverse lever in cab
Lifting link Expansion link
Rocker arm through frame
Backward rod Valve link
•The basics of steam
• The basics of steam
•Pistons and lubricators
• Pistons and lubricators
• Reversing mechanisms
• Valve gears
•Fuels and burners
• Fuels and burners
• Boiler fittings
• Feedwater systems
Including an extensive
Including an extensive
gallery of steamers from
gallery of steamers from
the author’s collection
the author’s collection
A Passio n for St eam A Passio n for St eam Small s cale ste am loco motives and ho w they work
Small s cale ste am loco motives and ho w they work
A Passion for Steam by Marc Horovitz
A Passion for Steamuses a significant section of the extensive Horovitz collection of steam locomotives to provide a photographic panorama of ‘garden size’ steam railway locomotion in all scales, complete with a potted biography and technical details of each model. This book not only traces the post-war development of commercial small-scale steam but also provides a full and accessible explanation of just how the various types of model actually function. To this end the first section of this authoritative work uses accurate and colourful CAD diagrams that, together with pertinent photography and informed text, provides information in a way that is not only very accessible for the new live steamer but a work of reference that will find a place in every hobbyist’s bookcase. The comprehensive gallery section of this inspirational book will, I am sure, be read and reread, not just for the information that it contains, but also for the sheer sensual pleasure of enjoying so many delightfully photographed steam locomotives.
Reader quotes: “... The first part has to be the best introduction to the workings of garden steam that I have ever seen ...”
“... This has to be the ultimate book for the Christmas list if you are a garden steam fan...”
“... My only disappointment is that I have nearly finished reading it already...”
MARC H OROVIT Z
Peter Fenn’s Mt. Gretna 4-4-0
The Mount Gretna Narrow Gauge, an offshoot of the standard-gauge Cornwall &Lebanon, was a two-footgauge line in Pennsylvania. It was built to carry tourists to picnic sites and hiking trails and, later, National Guardsmen to their training grounds. The four-mile-long railroad owned a total of four locomotives. The first was a 0-4-4 Forney that proved unsuitable. The other three, constructed for the line by Baldwin, were smaller replicas of the 4-4-0 standard-gauge engines that ran on the Cornwall & Lebanon. The Mt. Gretna Narrow Gauge was the only twofoot-gauge US railroad ever to run 4-4-0 locomotives. In 1986 I was approached by a man who lived in Pennsylvania and who had an interest in this railroad. He asked if there were any models of these obscure locomotives on the market. I assured him that there were not, so he asked if I could find someone to build some for him and coordinate and oversee the project. I wrote to Peter Fenn of Wye Valley Model Engineering in Hereford (UK), with whom I’d had some correspondence and had visited on one of my trips over, to see if he was interested in the project. Peter, I knew, was a superb engine builder. Fortunately, he was interested, and we were away. We decided on a scale of 16mm to the foot. Our client wanted the engines to be functional and to resemble the Mt. Gretna locomotives as closely as possible externally. He was not so concerned about the workings of the engine, so Peter and I decided that meths firing and slip-eccentric reversing would be the best way to go. I supplied Peter with what drawings and photos I could find of these locomotives, and he commenced. I received periodic progress reports from Peter, which I forwarded on to Pennsylvania. As the project neared completion, the problem of paint and colours came up. Here, our client was able to supply all the necessary information, as he was involved in the local historical society and had done a lot of research in this area. Colour samples and diagrams were forwarded to Peter. I supplied Peter with full-size artwork for the lettering and lining on the loco, and he had dry transfers made. Finally, in 1991, the locomotives were finished and shipped. A total of five were made – three for the man in
The Mount Gretna Narrow Gauge was the only two-foot-gauge railroad in the US to use 4-4-0 locomotives. The colourful paint job seems correct and proper for a 19th-century tourist line.
Pennsylvania, one for me, and the fifth was purchased by an anonymous buyer. We were all delighted.
The meths burner utilizes three flat wicks with septums between to help direct the flames. In the upper left is the lubricator, disguisedas anair tank.
Cross tubes Flue Firebox
Figure 4: W righton boil er
The model This model is finished to a very high standard indeed. The multi-colour paint job is flawless and as authentic as possible. All important details are there. The engine has an internally fired multi-flue boiler. On the backhead is a proper pull-out type throttle, along with a water glass with blowdown, pressure gauge, blower valve, and a bypass valve for the axle pump. There’s a dead-leg lubricator on the right side of the cab. Cab fittings are laid out with a precision I’ve not seen elsewhere. Slip eccentrics operate the valves. All axles on the locomotive (but none on the tender) are sprung. The springs are soft enough that they actually function in the way they were intended. The tender carries water in the rear and fuel forward. A hand pump can be accessed through the water hatch. A small valve just behind the coal bunker operates the chicken-feed fuel system. Alcohol is added via a port in one of the tool boxes.
communica ting with t he smokebo x. In the flu e were a nu mber of cross tu bes set at an angle t o increase surface are a and impede th e draft a lit tle. This w as a high-f unctioning boiler with a lot o f surface ar ea and the fire was en tirely conta ined within the w ater space. I t was a littl e more diffi cult to cons truct than the S mithies and, should on e of the cro ss tubes spr ing a leak, tough to repair. Aster used a variation o f this boiler (figure 5) in their Baldwin 04-2T. John van Riemsdijk ( JvR), a m ainstay of the Gauge 1Model Railw ay Associati on and a m an scientifi cally traine d in things stea my, has deve loped a nu mber of exc ellent boile rs for small engi nes. The J vR type B boiler(figu re 6) featu res a
Flue Riser Firebox
Figure 5: As ter’s Baldw in 0-4-2T b oiler
Above: Four-bar crosshead guides are used on the model, as they were on the full-size locomotive. Spoked leading wheels were milled, not cast.
plain boiler shell with an extern al firebox toward the rear. Several fire tubes wit hin the boi ler emerge at the rea r from the botto m of the b oiler into the firebo x, and int o the smokebox at the fro nt. This is an efficien t boiler th at is relativelye asy to cons truct. The JvR typ e C boiler(f igure 7) ha s met with great succes samongst model engi neers and at least o ne comme rcial builder. Ast er has used it on seve ral of its en gines. Ther e are one or tw o variation s to this b oiler. The way it nor mally appears is a s a simple boiler tube with flues t hat pass all the way throug h it, from f ront to rea r. A special external fi rebox, often made of stainle ss steel, is attached to the boiler as a
Right: Great attention has been paid to the layout of the cab. Note how precisely the pipework has been bent.
Fire tubes (as many as five) Firebox
Figure 6: Jv R Type B boi ler
Flues (usually two or three) External fire box
50 Figure 7: Jv R Type C boi ler
Top: Aster used a JvR type B on its small, freelance 0 -4-0T Old Faithf ul. Here y ou can see where the f iretubes e merge into the fi rebox.
Above: The JvR type C boiler ha s an add-o n firebox t hat directs the fire into th e firetubes, which em erge from the back of the boil er. This on e, on an A ster 0-6-0 T pannier t ank, is made of sta inless steel and exten ds back ov er the rear axle.
Specifications Specifications Builder:Wye Valley Model Engineering – Peter Fenn (UK) Date built:1991 Gauge:0 (32mm) Scale:16mm Boiler:Internally fired, multi-flue Fittings:Safety valve, throttle, water glass, pressure gauge, blowdown, blower, bypass valve Fuel:Alcohol Blow-off pressure:60psi Cylinders:Two, double-acting D-Valve Reversing gear:Slip eccentrics Lubricator:Displacement Weight:13lbs (loco and tender) Dimensions:Length (loco and tender), 235⁄8in;width, 41⁄4in;height, 63⁄4in
Right: The rear truck ofFireflyhas been rem oved and the as hpan drop ped. The grate i s in its working po sition.
Lower Righ t:With th egrate drop ped, the in terior of the fireb ox is visibl e. The dry-back d esign gives more fire-grate a rea. Flue h oles can just be seen on t he tube plate on th e right sid e.
Below:Hu gh Saunde rs built this coal-fi red Also 2 -6-2T Firefly. It has a prope r locomotive-type boiler wit h a dry-back fi rebox.
separateun it. This dir ects the fir e, which is under the b oiler, through th e tubes an d into the smokebox. This may be the easiest-to-b uild interna lly fired bo iler around .All of the a bove-menti oned boiler s are most suitable f oralcohol fue l, although gas burner s have been adapted to some of them. F or coal bur ning, the l ocomotivetype boiler (figure 8) is al most a must . As the na me suggests , this is an adaptation of th e boiler typ e used on f ull-size loc omotives. T here is a firebox at the bac k with a gra te in it for the coal. T he firebox can be surrounde d by water on five side s (called a wetback firebo x), or just o n the sides and the cro wn sheet (c alled
Firebox (wet back v ariety)
Figure 8: Lo comotive-ty pe boiler (Shown wit h coal fire— works equal ly as well w ith alcohol)
a dry-back firebox), o r a combin ation there of. The wet -back firebox is t he most dif ficult to bu ild, but is t he most effi cient. However, it cuts dow n on comb ustion spac e within, w hich could be cr itical to a s mall locomo tive’s perfo rmance.Th e dry back is easie r to build, but loses so me heat via r adiation thr ough the dry bac k. In our s mall-scale en gines, thou gh, the diff erence in perform ance is min imal. In th e back wall of the fire box is the fire do or, through which the fire is fed. From the fr ont wall of the firebox , a number of fire tub es, or flues, c ommunicat e with th e smokeb ox. These may include on e or more l arger super heater flues , through which the superh eater pipe(s ) pass. As mention ed above, t his is the m ost difficult type of boil erto build. It also has t he highest r atio of heat ing area to water
215 x 273mm, 208 pages, colour throughout, Hardback with dust jacket. ISBN: 978-1-902827-18-6
ATLANTIC EDITIONS LTD West Street, Bourne, Lincolnshire PE10 9PH Tel: (0)1778 392032 (UK & Overseas) – E-mail: email@example.com
COVER PRICE COVER PRICE
Plus post & packing No.177 MAY 2009
G ARDEN R ail G ARDEN R ail
Incorporating GARDEN RAILWAY WORLD
Publisher: Trevor M. Ridley
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Columnists Geoff Calver, Alan Davis, Stuart Moon, John Rogers, David Pinniger, Peter Spoerer
Garden Civil Engineering David Pratt
Technical Columnist John Lythgoe
Horticultural Columnist Becky Pinniger
Photography Phil Sixsmith
Buildings & Structures Kit Reviews Mark Thatcher
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© GardenRail 2009 ISSN: 0969-952X
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C ontents C ontents
5 EDITOR’S LETTER Tag Gorton
10 ALL FIRED UP Chris Bird
13 ARTICULATED LOCOS OF THE KHLR Colin Copcutt
16 A SIMPLE 16mm FLAT WAGON Peter Cole
18 GROUND RULES FOR THE GARDEN Becky Pinniger 10
38 GAS FIRING A ‘SPAM CAN’ David Stick
44 TRADING PLACES
47 CLUB NEWS
48 DIARY DATES - MARKET PLACE
No.177 MAY 09 Front Cover: The tram service, being uni-directional has proved very popular with the passengers and has become a regular service on the DLR, thanks to its ability to swing both ways. Photo: Mark Thatcher
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20 IN THE NIGHT GARDEN Paul Holt
23 SUPERTRAM Geoff Nicholls
24 ADDING MORE DETAIL Barry Pulford
26 NEW AND IMPROVED Mark Thatcher
33 30 YEARS OF MAMODRY Alan Dunster PART 2
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