Ed In the era of beehive oven coking, this was usually done in immediate proximity of the coal mine. This is largely because coking greatly reduces the weight, by boiling off volatile hydrocarbons and

Larry Regarding MK4's and similar: You want a bit of wire that fits into the centering spring, and is a little shorter than the free space between the pivot post and the coupler's spring retaining loo

Craig Loco Doc, doing business as the Salida Roundhouse, uses Faulhabers for most of his many HOn3 remotering kits, and also sells the bare motors. He uses 18 (or 24?) volt versions to get the low 12

Dale Axle wipers do not actually need the high contact forces that make most commercial axle wipers such effective brakes. They do require moderately high contact pressure to maintain electrical conti

Sam The minimum clear width for SG through bridges was 16' for straight track, increasing for curved alignments, per the 1920 AREA specifications for steel bridges. And "The minimum width center to ce

Following up on Darryl's post, I an across the following reference. https://archive.org/details/stampmillinggol00rickgoog/page/n5 to "The stamp milling of gold ores"; by Rickard, T. A. (Thomas Arthur)

The masonry variations that Duncan describes are largely due to the stone's source. Quarried stone intended for coursed masonry is deliberately taken from formations that will yield consistent thickne

Tanks Ed John

Phil's contribution led me to the Lone Star Region's Clinics page at <http://www.lonestarregion.com/node/5>, and down in the 'Specalty' section is a 3-part series "Mining 101-3". This is a very good e

Martin The K-Combined (KC) and K-Detached (KD) brake gear were produced in several sizes, proportioned to a car's light weight. The 8"x12" cylinder bore and stroke version was standard for cars of abo

Still available from Trout Creek, and always have been! John Stutz

Ray Re: Trivia question: Where did the OY come from? I expect Schenectady. This because ALCo had acquired the production rights sometime before 1910. Rotaries are included in their 1910 Buenos Aires E

Tony Your Rotary listing is short by 2 or 3 dozen. There appear to have been 17 more steam Rotaries built in Japan for local use, and a similar number built in Europe: I believe that the 42" gauge Jap

Ed Do a Google search on 'steam railroad rotary snow plow', and check out the photos. Mostly exterior, but some interior ones, taken from catalogs and contemporary descriptions. The Gerald Best book i

In addition to the Belpaire firebox, Tony's 1894 photo of #47 shows an early application of Walschaerts valve gear, being used here over a decade prior to its general adoption on US locomotives. The R

Doug Kadee 714 scissors couplers (and the brown version 715? ) are the defacto standard for HOn3. They are somewhat oversize for the full size MCB couplers used on the Colorado NG roads. Since the cen

Regarding the five C-25 equivalent engines: These were not exact copies of CR #103, and that engine was twice severely modified by the D&RG, first with a an extended cab and later with a near standard

Jim & Earl Regarding folio and similar measurements: The D&RGW locomotive diagrams issued in the 1950's, and formerly available from the Maxwell Collection, do indeed show boiler barrel "OD"s. This is

Hiking the White Pass some years ago, I found the ties at about 2' CtoC. John Stutz

Michael The Hathi Trust at https://www.hathitrust.org/digital_library is the place to search for such, but I do not find anything for the Railway Review later than 1923. Probably due to American copyr