Lokomotiva na svoz uhlí modelové železnice v měřítku Sn3 pro železniční modeláře v modelářské kvalitě - Boo-Rim Precision Lumber Co. #001 Sn3 Class A 16 Ton 2-Truck Wood Fired SHAY Logging Steam Locomotive DCC & Sound Ready.

S SCALE - originally called "H-1" because it was half the size of Gauge 1 (1:32), the "S" name is derived from "sixty-fourth". Sn3 – using S scale (1:64 ratio) with 14.3 mm (0.563 in) gauge track.

In rail transport modelling, Sn3½ is a scale/gauge combination derived from S scale to represent narrow gauge 3 ft 6 in (1,067 mm) track by using 16.5 mm (0.65 in) gauge track (the same as HO gauge). The scale is 1:64. As 3 ft 6 in (1,067 mm) track scales down to 16.5mm at 1:64, modelers use HO gauge track (which represents standard gauge at 1:87 scale) on Sn3½ layouts. This scale is popular in North America to depict 3 ft (914 mm) narrow-gauge prototypes (using dedicated 14.28 mm (0.562 in) gauge track and known as "Sn3"), and elsewhere to depict the 3 ft 6 in (1,067 mm) narrow-gauge railways (using H0 scale 16.5 mm / 0.65 in gauge track and known as "Sn3​1⁄2") of South Africa, Australia and New Zealand. Sn3½ is so popular in South Africa, Australia and the most common narrow gauge in the United States and in Ireland.

3 ft (914 mm) gauge railroads were widespread in the United States in the period 1880-90. While most of these railroads were converted to standard gauge by the start of the 20th Century, a number of lines survived till the Second World War and later, and became popular subjects for modelling. Probably the most popular prototype is the Denver and Rio Grande Western Railroad, followed by other Colorado railroads such as the Rio Grande Southern and Colorado and Southern. Other railroads from California and the eastern states are also popular.

As a wood fired engine this locomotive could pull a five car train up the 3,5 percent grade having the tall railing around the water bunker.

Some Operating Features:

8 Wheel Electrical pickup. All Wheel Drive just like the prototype. Swiss Made Maxon Motor w/Integral Gearing. Real 2:1 "Bevel Cut" "Ring and Pinion" Geared Trucks. Real Driveshaft and "U" joints just like the prototype. "Quartered" Sound Cam hidden on the Driveshaft. Stainless Steel Driver Tires. "CNC" Cut Precision Gears throughout . Factory Installed, Operating Genuine Kadee ® Couplers. Outfitted for use with oil fuel, has the ubiquitous oil bunker atop her water tank. She is also sporting "Lima Arc" headlamps.

Driving normal fixed frame locomotives on logging railways was virtually impossible. The irregular underground made the wheels come off the track and derailed the locomotive. The three most numerous solutions to this problem were the Shay (2771 built), the Climax (appr. 1100 built) and the Heisler (appr. 850 built).

The Shays landmark is its powerful fast running three cylinder steam engine on the right side. Early examples though were fitted with two cylinders and with a straight boiler.

American Geared Locomotives - Historical Background:

Like so many technological advancements, invention is often derived from need. These interesting geared locomotives were conceived and designed by men working on site and looking for better ways to transport logs as quickly as possible on temporary rails over rough terrain. Ephraim Shay was one of these men and the story starts with him.

Ephraim Shay (1839-1916) designed the first Shay locomotive and patented the type.

Ephram Shay (right) studied to become a school teacher and taught in New Jersey and Ohio during the late 1850s. From 1861 to 1864 Shay Ephraim served in the Western Theatre of the Civil war, under General William Tecumseh Sherman. Upon his discharge in 1864, Shay married and moved to Michigan he established a general store and sawmill and was running a logging business to supply the mill.

In the early days of logging, the loggers would transport the logs down the rivers to the sawmills. When no river was available or when the trees near to the river had all been harvested, they used ox and horse drawn sleds in the Winter to haul the logs out of the forests. When demand increased, crude railcars pulled over wooden rails set to a 26-inch gauge were used to haul out more and even bigger logs.

In 1876 Shay realised that a steam powered locomotive would greatly help his business and allow him to haul more logs and become more competitive. He started off with a very crude and simple twin cylinder locomotive, but soon. Shay realised that the dynamic force of conventional locomotive pistons on either side of the loco proved to be too much and damaged the track curves.

He thus set about designing a solution that applied an equal amount to torque to each side of the locomotive. In 1877 he hired William Crippen of Cadillac, Michigan to build a boiler and cylinders that were connected to the axel of the little loco by a belt-drive. Shays design was not patented and Crippen went on to produce the locomotive for the local industry. The Lima Machine Works in Ohio was requested to build the locomotive by James Alley as Crippen was over booked. Again as there was no patent, the Lima company produced the locomotive and a few variants for the logging business.

Shay modified his designs according to his needs, but in 1880 he needed an upgrade. As Crippen was too busy, Shay contacted the Lima Machine works company and they worked with him on his redesign.

A Lima Works engineer, John Carnes, came up with the idea of powering each axel of both trucks using bevelled gears situated outside the trucks on one side of the locomotive. The gears were connected by horizontal shafts that were subsequently connected to a crankshaft driven by the steam powered cylinders, vertically oriented above. SN-6 was a duplicate built for Milton J. Bond who had seen and was impressed by Shay s locomotive. The SN-6 was the first of 2770 Shay locomotives built by Lima.

Shay finally realised that he had something interesting here and he filed for patent on March 30th 1881. This was his Golden egg as it was the Lima works that would be building the locomotive and he would be paid royalties for every one made. His patent covered the concept of using gears to drive the axels. A patent that covered many forthcoming locomotive designs.

He spent his later life promoting his locomotives and in 1901, at the age of 62, Ephraim Shay sold all of his stock in Lima, thereby completely ending links with the company. Shay kept on inventing and lived out the rest of his life in Harbor Spring, Michigan.

Here we look at the 3 most popular geared locomotives of the late 1800s and early 1900s.

The Shay Locomotive:

The classic Shay loco as we have come to know it is consisted of 2 or 3 vertical steam cylinders positioned on the right side of the engine just forward of the crew cab. The piston rods were attached to a "crank shaft" similar to that used in today s automobile engines. Attached to either end of the "crank shaft" were drive shafts that extended to a gear box on the outside of each wheel. The left side had no gearing or cylinders. The boiler is located off centre and to the left of centre of the entire frame. This was necessary for the location of the cylinders.

They were manufactured with either two or three cylinders. The three cylinder models were used on the larger and more powerful engines.

Models with two, three, or four truck sets were manufactured. More trucks meant more distributed weight and thus more powerful locos could be built. The two truck models carried their fuel and water bunker at the back of a single frame for the entire locomotive. On the three truck models, an additional tender with its own single driving truck was added to the basic two truck locomotive frame. With the four truck model, the tender was longer and was supported by two driving trucks.

The first Lima factory built Shay that was a two truck Class "A" sold to J. Alley Co. for $1,700 in 1880, with two others being sold that year. The last Shay built was the three truck Class "C" locomotive (sn-3354) sold to the Western Maryland Railroad in 1945.



PLEASE NOTE: Due to the small edition size and the great demand for this item, allocations are expected to occur.

UPOZORNĚNÍ: TITUL JE VYROBENÝ V OMEZENÉM MNOŽSTVÍ JAKO UMĚLECKÝ PŘEDMĚT. UVEDENÁ PRODEJNÍ CENA JE PLATNÁ DO VYPRODÁNÍ TUZEMSKÝCH ZÁSOB.

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