Southern Pacific #4294 HO Cab Forward 4-8-8-2 AC-12 Steam Locomotive DCC & LokSound

Southern Pacific #4294 HO Cab Forward 4-8-8-2 AC-12 Steam Locomotive DCC & LokSound
#Cab Forward#AC-12

Parní lokomotiva modelové železnice v měřítku HO pro železniční modeláře v modelářské kvalitě - Intermountain 59009(D)(S) Southern Pacific #4294 HO Cab Forward 4-8-8-2 AC-12 Steam Locomotive DCC & LokSound.

■ Sharp Painting and Lettering. ■ Powerful Drive. ■ Directional Lightning & Intricate Details. ■ Factory equipped with an ESU® LokSound® Select sound decoder. ■ Number #59009S.

In the 1920 s, the Southern Pacific had a need for powerful locomotives, but found that the new articulated 2-8-8-2 s did not work well for them. They were a hazard to the crews when traveling through the long tunnels and snow sheds on their system. The exhaust fumes were capable of blinding and suffocating crew members, so to resolve this problem, the Southern Pacific decided to run in reverse.

The next articulated engines from Baldwin were built with the cabs in the forward position. The SP went on to build many classes of these "Cab-Forwards". The Southern Pacific had used Cab-Forward locomotives since the early 1900s on its mountain routes. With the smokestack located behind the cab, the engine crew wasn t asphyxiated during the run, which included miles of tunnels and snowsheds.

To help deal with increased rail traffic during World War II, the War Production Board approved the SP s order for 20 new 4-8-8-2 Cab-Forward locomotives. Baldwin delivered the locomotives, classified as AC-12 by the SP, in 1943 and 1944.

For more history on Cab-Forward locomotives, see Cab-Forward: The Story of Southern Pacific Articulated Locomotives by Robert J. Church.

The Southern Pacific #4294 HO Cab Forward 4-8-8-2 AC-12 Steam Locomotive DCC & LokSound features:

Sharp Painting and Lettering, Powerful Drive, Directional Lighting & Intricate Details. Sound units are factory equipped with an ESU® LokSound® decoder. Electrical pickup on 16 drivers and 12 tender wheels. Front and rear Kadee Magne-Matic operating couplers at correct height. Illuminated headlight, backup light, and number boards. Metal RP-25 contour wheels, in gauge. Minimum radius: 24". Weight: 2 pounds 1 ounce (engine weighs 1 pound 11 ounces). Era: 1943 to late 1950s.

The InterMountain cab forward steam locomotive is said to be a very attractive model & the most accurate, most highly detailed HO steam locomotive ever produced.

The HO AC-12 has a high level of accurate detail and equipped with ESU LokSound Digital Command Control (DCC) sound decoder that operates on DCC and DC layouts.

The best known example of the 4-8-8-2 cab forward design in the United States is the unique Southern Pacific Cab Forward that no other US railroad ordered. This placed the cab at the front by the simply turning the entire locomotive, minus the tender, by 180 degrees. This arrangement was made possible by burning fuel oil instead of coal.

The cab forward design was used by the Southern Pacific Railroad to deal with the peculiar problems of its routes. The 39 long tunnels and nearly 40 miles of snow sheds of the Sierra Nevada Mountains could funnel dangerous exhaust fumes back into the cab of a conventional steam locomotive. After a number of crews were nearly asphyxiated, they started running their conventional locomotives in reverse. This meant that the tender was leading the train and blocked the view ahead. It also put crewmen on the wrong sides of the cab for seeing signals. The tenders were not designed to be pushed causing speeds to be reduced. Southern Pacific commissioned Baldwin Locomotive Works to build a prototype cab forward locomotive, then ordered more units before the prototype had even arrived.

All of the cab forwards were oil burning locomotives, which meant there the tender could easily be placed at what would normally be the front of the locomotive. The oil and water tanks were pressurized so that both would flow normally even on uphill grades. Visibility from the cab was excellent, one crewman could easily watch both sides of the track. The biggest advantage was that the arrangement placed the crew well ahead of the exhaust fumes, insulating them from that hazard.

InterMountain did an excellent job modeling the AC-12 in HO scale. The locomotive and tender are made primarily of plastic. Separately applied parts include all handrails and piping, whistle, and dynamo. The tender also has separately applied underbody brake rigging. The cab interior has a boiler backhead with painted gauges and valves.The locomotive and tender lettering are straight and match prototype photos.

The motor and flywheel are housed inside the locomotive boiler. The motor powers the second driver axles of each engine. The side rods transfer power to the other drivers. The model has an articulated frame. As on the prototype, the model s front engine is rigid and the rear engine is hinged at the front. A wiring harness connects the electronics in the locomotive to the DCC decoder and speaker in the tender.

Before operating the locomotive a model railroader should thoroughly lubricate it with plastic-safe light oil as indicated in the instruction manual. All the running gear operate smoothly without any binding. Testing the model in DCC with an MRC Prodigy Advance power pack delivers 14.5 VAC to the track and in the DCC speed tests the AC-12 accelerates to a top speed of 40 scale mph (the prototype could reach more than 60 mph). Running the model with a 20-car train along the layout for minutes goes without problems. The model looks great rounding a 32" curve and travels forward through turnouts without any difficulty. However, the locomotive s trailing truck tends to derail when backing through turnouts.

When advancing the throttle, the exhaust sounds are synchronized to the motion of the drivers. At rest automatic sounds includes the characteristic air pumps. The chuffing exhaust sounds are also synchronized to the motion of the drivers. User-triggered functions include the bell, whistle, coupler, and a water stop sequence. The many programmable configuration variables (CVs) are outlined in an extensive instruction manual on CD-ROM. The InterMountain AC-12 is a great-looking model. The DC sound and top speed issues should be addressed in future releases.

The InterMountain Cab Forward is one of the most highly detailed steam locomotives in model railroading. There are numerous etched metal and wire details throughout the model as well as finely molded plastic details. Just like the prototype, the front "engine" is rigid, only the rear "engine" articulates. The minimum radius is 24". There are no visible gear towers above the "engines" for a better prototype appearance. LED lighting is used throughout including the front headlight, rear tender light, and cab number boards. All metal Kadee® couplers are mounted on both ends. The locomotive is powered by a powerful Northwest Short Line motor. This locomotive is sure to become a favorite on your railroad!

Four classes of the Southern Pacific Cab Forward are produced by InterMountain, AC-8, AC-10, AC-11, and AC-12. Each class and road number is faithfully and uniquely represented by paint and tender lettering scheme differences, all based off of prototype information.

AC-8 built July - October 1939 (All scrapped by April 24, 1959). AC-10 built January - June 1942 (All scrapped by August 7, 1959). AC-11 built November 1942 - May 1943 (All scrapped by April 1959). AC-12 built October 1943 - March 1944 (All retired by September 1958. All were scrapped except #4294 which is on display at the California State Railroad Museum in Sacramento, CA)





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

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