Lokomotiva na svoz dřeva modelové železnice v měřítku HO pro železniční modeláře v modelářské kvalitě - United Scale Models Buffalo & Susquehanna HO Class B Geared 2-Truck Brass Scale SHAY Logging Steam Locomotive & Tender DCC, Japan Atlas, 1960s Run.

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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.

The Climax Locomotive:

Designed by Charles Darwin Scott - Spartansburg, Pennsylvania. Patented by George D. Gilbert. Gilbert, who was a relative by marriage of Charles D. Scott, was an design engineer for the Climax Manufacturing Company. The locomotive was first manufactured by Climax Manufacturing Company and subsequently by Climax Locomotive Works, both of which were located in Corry, Pennsylvania. It was built between 1888 and 1928.

The basic Climax consisted of 2 steam cylinders whose piston rods came out of the cylinders and attached to a transmission located under the centre part of the engine frame. Connected to front and rear of the transmission were drive shafts which ran along the centre line of the engine below the boiler, cab, and fuel bunker. The drive shafts were connected to gear boxes in each truck. These gear boxes supplied power directly to both wheel sets in each truck.

Models with either two or three truck sets were manufactured. The three truck models were used on those engines that required more power and more fuel. The third truck was powered and carried a tender (similar to those on "rod" engines) to carry additional fuel and water.

The Heisler Locomotive:

The first locomotive of the Charles Heisler design was built in 1891 by the Dunkirk Engineering Company. The design was patented by Charles Heisler in 1892.

The Heisler consisted of 2 steam cylinders positioned in a "V" under the boiler about 3/4th the way back from the front. The piston rods came out of the cylinders and attached to a "crank shaft" located under the centre of the boiler. Attached to either end of the crank shaft were drive shafts. The drive shafts were located below the centre line of the engine. On the two truck models, the drive shaft attached to a gear box located on each truck s wheel set that was located furthest from the centre of the engine frame. Power was then supplied to the other wheel set on the truck with an outboard tie rod connecting two wheel sets together. This tie rod is readily visible in the picture above.

In terms of speed, it was the fastest of the 3 most prevalent geared steam locomotives depicted here. It also had the fewest numbers manufactured of these type of locomotives.

Models with either two or three truck sets were manufactured. The three truck models were used on those engines that required more power and more fuel. The third truck was powered and carried a tender (similar to those on "rod" engines) to carry additional fuel and water.

Bachmann & Rivarossi Geared loco models:

There are a few model companies producing geared locos. On30 locos are very popular in the US and G scale Shay locos are also common in many a garden layout. You will find good brass models and also live steam and miniatures too. Bachmann produce HO, On30 and G scale Shay locomotive models and are perhaps the most popular manufacturer of these locos. They also produce a Climax model.

Rivarossi produced two Heisler Locomotive models, a two truck and a three truck version.

The Bachmann HO scale range consists of HO scale models from North America. HO are 1/87 scale models, running on the same 16.5mm track gauge as OO scale models. The Spectrum range are also HO and N Scale American prototypes but feature a greater level of detail and improved mechanisms.

As well as producing painted unlettered locos - ready for personal customisation, Bachmann produce Shays in the company liveries for Greenbrier & Elk River, Ely Thomas Lumber Co., Weyerhaeuser Timber, Cass Scenic Rail Road, W.M. Ritter Lumber Co. and WVP&P Co.

As well as producing painted unlettered models, Bachmann produce Climax locos in the company liveries for Moore-Keppel & Co., West Virginia Pulp & Paper, W. M. Ritter Lumber Co. and Clear Lake Lumber Co.

Rivarossi has produced the Heisler in two truck wood burning and oil burning models with the following liveries: McCloud River, Georgia Pacific, Coos Bay Lumber, West Side Lumber Co., Potlach, Pickering and Boise Cascade. The model was produced as a three truck model for Lehigh Navigation Coal Co, St. Regis Paper Co. and Cass Scenic Railway.

The Shay was one of the most unusual steam locomotives ever conceived. Designed to power logging or mining operations, this standard gauge workhorse features a steel or wood-style cab appropriate to prototype.

Only four remaining operational Climaxes represents the last Climaxes to be used in revenue service, eventually ending its illustrious industrial career in the late 1960s. The standard gauge prototype still operates in tourist service on the Durbin & Greenbrier Valley Railroad in Durbin, West Virginia.

Again, we see independent trucks with universal joints and sleeves on the central drive shaft. Bevelled gears drive all the axels. Another slow mover. The movement of the piston rods set at steep angles driving flywheels and gearboxes under the loco is very interesting to watch. It has a very slow operation, but again with plenty of torque.

Rivarossi Two Truck & Three Truck Steam Heisler HO Scale:

These models were first produced in the 80s and then updated at the end of 2002. In 2003, Lima was forced into liquidation and in October 2004 Hornby acquired the assets of Lima, including Rivarossi.

These Rivarossi models, produced in the early 2000s are made with an all-new body that completely eliminates moulded-on detail. All of the piping, sand lines, air lines, and more are separate details. Blackened wire grab irons and handrails add to the realistic effect. There is also a solid-brass whistle, pop valves, bell, front number plate and photo-etched builders plates. And check out the other new features like flush-fitting cab windows, optional headlight styles and working knuckle couplers.

Inside that beautiful body lurks a tough, new drive that works like a real Heisler! A can motor and new gearbox are connected to a super replica of the V-2 "motor engine," so the crankshaft, rods and valve gear move like the originals.

Driveshafts transmit power to solid-metal worm gears on one axle, and side rods power all of the wheels just as the prototype did. Best of all, the models are DCC-ready so you can plug in your favourite decoder and start running.

A larger weight and an optional traction-tire-equipped driver set are included to improve pulling power. Plus, the trucks have been carefully engineered to provide all-wheel electrical pickup and still take incredibly sharp curves with ease.

Perfect for any industry from logging to coal mining to industrial switching these new models are offered in both 2 and 3 Truck versions. Each is fully assembled and factory painted. Various road names are available.

The Rivarossi 3 Truck model depicts a large standard gauge three truck machine, and is quite impressive.

The underlying shell is enhanced with many added details- fine black wire handrails, coupler cut bars, air brake pump, reservoir, and piping, with the smoke box number plate, bell, whistle and safety vales in brass.

The working motion is a treat and the model is powered from a motor in the cab and bunker which drives the trucks using the central drive shaft with universal joints, as per proto type; the gearbox is hidden in the firebox. The loco sports a good plain satin black finish with dark graphite smoke box.



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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