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HO 4-6-6-4 CSA-2 Challenger Locomotive with Tsunami2 DCC & Sound, UP #3938

Item No. ATHG-1022
HO 4-6-6-4 CSA-2 Challenger Locomotive with Tsunami2 DCC & Sound, UP #3938
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3.5 out of 5 Customer Rating

HO 4-6-6-4 CSA-2 Challenger Locomotive with Tsunami2 DCC & Sound, UP #3938

Item No. ATHG-1022
$629.99
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Product Details

PROTOTYPE SPECIFIC INFORMATION

ALCO constructed the first 4-6-6-4 locomotives in the world, numbered 3900 to 3914, for the Union Pacific Railroad in 1936. These huge engines were named the Challenger Simple Articulated, or CSA-1, class. The railroad received 25 near copies, classified as CSA-2, the following year.

Unlike compound Mallet engines that crawled along with drag freights, the Challengers had two sets of high- pressure cylinders and could safely reach passenger train speeds. The mammoth locomotives also had a heavy-duty starting tractive effort of 97,400 pounds.

Originally constructed to haul fast freight up the famous Wasatch grade, the CSA-1 and -2 Challengers would hold a variety of assignments over their long careers- including passenger service. Depending upon their operating territory, they burned either coal or oil, and some locos were converted back- and-forth several times.

ROAD NUMBER SPECIFIC FEATURES:

  • #3820 Class CSA-2, Worthington feedwater heater, large sand dome, covered vertical bar pilot, walkway “hump”, no steam pipe to front cylinders, blackened metal side rods, satin paint finish, oil burner. Era 1940s+
  • #3823 Class CSA-2, Elesco feedwater heater, large sand dome, covered vertical bar pilot, walkway “hump”, no steam pipe to front cylinders, blackened metal side rods, satin paint finish, oil burner. Era 1940s+
  • #3907 Class CSA-1, Worthington feedwater heater, standard sand dome, boiler-tube pilot with wide handrails, no walkway “hump”, steam pipe to front cylinders, blackened metal side rods, satin paint finish, coal burners. Era 1936+
  • #3911 Class CSA-1, Worthington feedwater heater, standard sand dome, boiler-tube pilot with wide handrails, no walkway “hump”, steam pipe to front cylinders, blackened metal side rods, satin paint finish, coal burners. Era 1936+

STEAM LOCOMOTIVE FEATURES:

  • Illuminated number boards and headlights
  • Headlight turns off in reverse
  • Illuminated directional back-up light in the tender
  • Correctly operating eccentric cranks
  • Adjustable top cab vent and cab windows
  • Pivoting front and rear engines for negotiating 18” radius curves
  • Current pick-up on all driver and wheels
  • Boiler backhead with full details and printed gauges
  • Synchronized chuff, whistle, bell, blow-down, air compressor, dyno and pop-off valve sounds
  • User-controlled whistle, short whistle, bell, squeal, coupler crash, injector, water stop and light dimmer
  • Individually-applied detail parts, including brass-painted bell and whistle, piping, valves, generator, steps, air pump, air tanks, reverser and coupler lift bar
  • Front coupler pocket can be inserted to mount operating coupler
  • Dual cube speakers for great sound quality
  • Upgraded headlight lighting with brighter LED
  • Improved loco-to-tender connection harness for increased durability and serviceability
  • Minimum recommended radius: 22”

SOUND-EQUIPPED MODELS ALSO FEATURE:

  • Tender-mounted DCC decoder with SoundTraxx Tsunami2 sound
  • Dual cube speakers for optimal sound quality
  • Sound units operate in both DC and DCC
  • Full DCC functions available when operated in DCC mode
  • Engine, whistle, and bell sounds work in DC
  • All functions NMRA compatible in DCC mode
  • Precision slow speed control
  • Program a multiple unit (MU) lashup with lead unit only horn, bell, and lights
  • Many functions can be altered via Configuration Value (CV) changes
  • CV chart included in the box

Product Specifications

DCC Equipped
Era 1911-1940
Full Road Name Union Pacific
Lighting LED
Minimum Radius 22" (559 mm)
Prototype Manufacturer American Locomotive Company (ALCO)
Reporting Mark UP
Scale HO
Sound Tsunami2
Sub Brand ATHEARN
Wheel Configuration 4-6-6-4