Fantastic new title from Fantastic new title from

Fire

Safety valve

Smoke stack

Boiler (water inside)

Throttle (regulator)Steam line from boiler

Exhaust line from engine to stack Steam chest (valve inside) Valve gear

Cylinder (piston inside) Piston rod Drive rod

Fuel tank

Reach rod to reverse lever in cab

Frame

Eccentrics

PUBLISHERS

Bell crank

Lifting link Expansion link

Valve rod

Backward rod

Forward rod

Rocker arm through frame

Valve link

• The basics of steam

• The basics of steam

• Cylinders

• Cylinders

• Pistons and lubricators

• Pistons and lubricators

• Reversing mechanisms

• Reversing mechanisms

• Valve gears

• Valve gears

• Boilers • Fuels and burners

• Boilers • Fuels and burners

• Boiler fittings

• Boiler fittings

• Feedwater systems

• Feedwater systems

Including an extensive gallery of steamers from the author’s collection

Including an extensive gallery of steamers from the author’s collection

A Passion for Steam

A Passion for Steam

MARC HOROVITZ

MARC HOROV

A Passion f or Steam A Passion f or Steam Small scale steam locomotives and how they work Small scale steam locomotives and how they work

A Passion for Steam by Marc Horovitz

A Passion for Steam uses 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 HOROVITZ

£2

166

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.

Smokebox

Pennsylvania, one for me, and the fifth was purchased by an anonymous buyer. We were all delighted.

Smokebox

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.

Cross tubes Flue Firebox

Figure 4: Wrighton boiler

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.

Flue Riser Firebox

Figure 5: Aster’ s Baldwin 0-4-2T boiler

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.

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.

The meths burner utilizes three flat wicks with septums between to help direct the flames. In the upper left is the lubricator, disguised as an air tank.

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.

communicating with the smokebox. In the flue wer e a number of cr oss tubes set at an angle to incr ease sur face ar ea and impede the draft a little. This was a high-functioning boiler with a lot of sur face ar ea and the fir e was entir ely contained within the water space. It was a little mor e dif ficult to constr uct than the Smithies and, should one of the cr oss tubes spring a leak, tough to r epair . Aster used a variation of this boiler (figur e 5) in their Baldwin 0-4-2T . John van Riemsdijk (JvR), a mainstay of the Gauge 1 Model Railway Association and a man scientifically trained in things steamy , has developed a number of excellent boilers for small engines. The JvR type B boiler (figur e 6) featur es a

plain boiler shell with an exter nal fir ebox towar d the r ear . Several fir e tubes within the boiler emer ge at the r ear fr om the bottom of the boiler into the fir ebox, and into the smokebox at the fr ont. This is an ef ficient boiler that is r elatively easy to constr uct. The JvR type C boiler (figur e 7) has met with gr eat success amongst model engineers and at least one commer cial builder . Aster has used it on several of its engines. Ther e ar e one or two variations to this boiler . The way it nor mally appears is as a simple boiler tube with flues that pass all the way thr ough it, fr om fr ont to r ear . A special exter nal fir ebox, often made of stainless 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.

Smokebox

Fire tubes (as many as five) Firebox

Figure 6: JvR T ype B boiler

Smokebox

Flues (usually two or three) External firebox

50 Figure 7: JvR T ype C boiler

T op: Aster used a JvR type B on its small, freelance 0-4-0T Old Faithful . Here you can see where the firetubes emer g e into the firebox.

Above: The JvR type C boiler has an add-on firebox that directs the fire into the firetubes, which emer ge from the back of the boiler . This one, on an Aster 0-6-0T pannier tank, is made of stainless steel and extends back over 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

R ight: The rear tr uck of Fir efly has been removed and the ashpan dropped. The grate is in its working position.

Smokebox

Boilers

Firebox door

Lower Right: W ith the grate dropped, the interior of the firebox is visible. The dr y-back design gives more fire-grate area. Flue holes can just be seen on the tube plate on the right side. Below: H ugh Saunders built this coal-fired Also 2-6-2T Fir e fly . It has a proper locomotive-type boiler with a dr y-back firebox.

separate unit. This dir ects the fir e, which is under the boiler , thr ough the tubes and into the smokebox. This may be the easiest-to-build inter nally fir ed boiler ar ound. All of the above-mentioned boilers ar e most suitable for alcohol fuel, although gas bur ners have been adapted to some of them. For coal bur ning, the locomotive-type boiler (figur e 8) is almost a must. As the name suggests, this is an adaptation of the boiler type used on full-size locomotives. Ther e is a fir ebox at the back with a grate in it for the coal. The fir ebox can be sur r ounded by water on five sides (called a wetback fir ebox), or just on the sides and the cr own sheet (called

Flues

Firebox (wet back variety)

Grate

167

Figure 8: Locomotive-type boiler(Shown with coal fire—works equally as well with alcohol)

a dr y-back fir ebox), or a combination ther eof. The wet-back fir ebox is the most dif ficult to build, but is the most ef ficient. However , it cuts down on combustion space within, which could be critical to a small locomotive’s per for m ance. The dr y back is easier to build, but loses some heat via radiation thr ough the dr y back. In our small-scale engines, though, the d i f f e r ence in per for mance is minimal. In the back wall of the fir ebox is the fir e door , thr ough which the fir e is fed. Fr om the fr ont wall of the fir ebox, a number of fir e tubes, or flues, communicate with the smokebox. These may include one or mor e lar ger superheater flues, thr ough which the superheater pipe(s) pass. As mentioned above, this is the most dif ficult type of boiler to build. It also has t h e h ighest ratio of heating ar ea to water

215 x 273mm, 208 pages, colour throughout, Hardback with dust jacket. ISBN: 978-1-902827-18-6

ATLANTIC EDITIONS LTD

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Plus post & packing No.178 JUNE 2009

GAR DEN RailGAR DEN Rail

Incorporating GARDEN RAILWAY WORLD

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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

Distribution News trade Warners Distribution

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© GardenRail 2009

ISSN: 0969-952X

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ContentsContents

5 EDITOR’S LETTER

Tag Gorton

10 ALL FIRED UP

Chris Bird PART 2

26 26

15 PEAT BOG SERVICE STATION

Cliff Thomas

19 LETTER FROM THE EDGE

John Wenlock

21 WELCOME TO DOLLYWOOD

Mark Thatcher

10

10

40 BLACKIE

Mike Ousby

44 TRADING PLACES

48 DIARY DATES - MAIL BOX

MARKET PLACE

No.178 JUNE 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: John Robinson

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25 NO LOCOS BEYOND THIS POINT

Geoff Hankin

26 H&M GARDEN RAILWAY

John Robinson

34 IT’S INCONVENIENT

Mike Goodwin

36 THE PORTISHEAD PORTASHED

John Rogers

19

19

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ON SALE 18th JUNE 09

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