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Big scale: Accucraft will soon sell its first U.S.-profile 1:13.7-scale locomotive, called ’Emma.‘

Using the National Summer Steamup in suburban Sacramento as a launching pad, Accucraft Trains Co. announced three new locomotives in July.

The Union City, Calif.-based maker of museum-quality brass models showed engineering models of a Union Pacific 4-8-8-4 “Big Boy,” a 1:13.7-scale 0-4-0 locomotive and a new entry-level engine that will retail for less than $400; all run on 45mm track. The company didn’t provide estimated delivery dates.

Big loco: Accucraft has shown an engineering model of its 4-8-8-4 Union Pacific ‘Big Boy.’

The “Big Boy” will be a 1:32-scale locomotive that will be about 50½-inches long, 4¼-inches wide and 61⁄3-inches tall. The butane-fired engine will have four cylinders with drain valves, two flues and will operate at 65psi, with two safety valves.

In addition, it will have not only an axle-driven water pump, but also a hand-operated pump in the tender. Further, the engine will be outfitted with an adjustable lubricator, a water-level gauge and a blow-down valve. Minimum operating radius will be 10 feet (three meters). Accucraft said in September that it would build 75 units and that it would be priced at $8995.

Union Pacific had 25 4000-class locomotives built between 1941-1994 by the American Locomotive Co. The “Big Boy” was a coal-burning freight hauler with an articulated design, designed to pull as much as 4,000 tons up grades at speeds up to 65mph. The company retired the fleet in 1959 and eight still exist as static displays.

Little loco: A new entry-level 0-4-0 locomotive from Accucraft, called ‘Dora,’ will retail for $395.

Accucraft’s first American-profile 1:13.7-scale locomotive, dubbed “Emma,” is a four-wheeled engine with a large saddle tank based on a Brooks industrial engine. The loco will be almost 13-inches long, about 5½-inches wide and seven inches tall. It will have two D-vale cylinders, a single-flue, butane-fired boiler with a water-level gauge, safety valve and a forward/reverser control, along with a lubricator, and operate at a 48-inch (1.2-meter) minimum radius.

The “Emma” will come in both lettered and unlettered models and is expected to retail at $995.

“Dora” will be Accucraft’s new entry-level locomotive (though it won’t displace the iconic “Ruby” series). A 0-4-0, “Dora” will have two wobbler cylinders hidden within its frame and a geared drive-train. The butane-fired engine will have a single-flue boiler, a safety valve and lubricator. “Dora” too will have a 48-inch minimum operating radius, but will be about six inches long, 3½-inches wide and a little more than six inches tall.

“Dora” is a free-lance design with no specific prototype in mind; it was inspired by a scratch-built locomotive designed by Marc Horovitz, editor of Garden Railways magazine, called “Indefatigable.” Accucraft has listed “Dora’s” price as $395.

Accucraft Trains Co., (510) 324-3399, http://www.accucraft.com/.