Valve Gear & Timing

Stevenson Valve Gear

In 1841 two employees in Stephenson’s locomotive works, draughtsman William Howe and pattern-maker William Williams, suggested the simple expedient of replacing the gabs with a vertical slotted link, pivoted at both ends to the tips of the eccentric rods.

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Stage 1 & 2

(November 7, 2007)

Stage 1 and 2 contain the frame and drive wheels.

The frame is beautiful.  It is probably made on a CNC and is powder coated.  It is held together in four places – the front and read frame spreaders.  There is also a spreader that holds the front spring Continue reading


(November 2, 2007)

The first section of the locomotive included everything necessary to build the entire kit.

Typical OS fashion, the kit is immaculate – everything is done with great thought and precision.  My first order arrived just about two weeks after I placed it.

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Consolidation 2-8-0

I’m building the Railroad Suppy 2-8-0 Consolidation. I really have not kept up with updating this page, but will post pictures here and there to give you a look of where I am in the project. I’ll have to re-post pictures, since they are in separate galleries.

Drivers on the Frame – 3/29/2005

I’m a bit behind on updating this page. The drivers are all complete and on the axles along with the crank pins and on the frame. The frame rolls really nice. Smooth as silk. You can find pictures in the gallery. I hope to get a lot done next week, since I will be home for a few days of rest following Lent and Easter.

Axles Almost Finished – 12/14/2004

Today I began work on the four main axles. I’ll finish them up tomorrow. The drivers are off to be keyed by Don.

Slow Progress – 12/11/2004

I have not posted much on this page. However I am making slow progress. The cylindar block along with the cylindar and piston valves. I’m now working on the axles. Once they are finished, ti will be time to press them on the drivers and turn in the flanges. I have a few pics. Once I take a few more, I’ll post them here. I’m learning a lot on this project under the guidance of a master builder and friend, Don Cornell. I haven’t made nearly as many mistakes as I did in building the Mogul. I’m just taking my time on this engine and doing things right.

Parts Ordered – 1/20/2004

This afternoon, I talked with Mike and place the order for the first four sections of castings. When the order is complete, I will pick it up to save on shipping.

Visited Railroad Supply – 1/19/2004

Today, I visited Railroad Supply to see their operation and the quality of their castings. I was really pleased with what I saw. Roland gave my father and I a tour of his shop and the warehouse. Everything was really well organized and the castings look top quality. Castings and raw stock is in well supply for all of the locomotives offered.

Later in the day, Mike met us with a copy of the building and erection prints for the Consolidation. The prints are also very well done. Everything is clear and direct. Each print has a list of everything needed for the print and each part has a smaller print for more detail. Prints are seperated in manila envelopes by each section

Locomotive Specifications

Total weight (engine and tender) dry: ?

Weight on drivers, dry: ?

Overall length: ?

Height: 21-1/8″

Driver diameter: 6″

Capactiy of tender: ?

Fuel: Coal or oil

Valve gear: Walschaerts

Working pressure: 125 lbs

Cylinder bore and stroke: 1-5/8″ x 3″

Tractive effort: ?

Minimum radius: ?

American 4-4-0

The Queen of Peace blank 1-1/2″ scale blank 4-4-0

Fr. Finelli

(You can find pictures of a rebuild of this locomotive in the gallery.)

The American style locomotive was the standard engine built by all of the locomotive manufacturers for many years bfore the turn of the century. The locomotive had many exterior variations, however Continue reading