Athearn Genesis G1024 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3907 DC

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.

FEATURES:

• #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+
• 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”

SPECIFICATIONS:

• DCC: Ready/21-Pin NEM
• Lighted: LED
• Sound: Ready
• Minimum Radius: 22″ (559 mm)
• Reporting Mark: UP
• Sub Brand: ATHEARN
• Full Road Name: Union Pacific
• Scale: HO
• Wheel Configuration: 4-6-6-4
• Era: 1911-1940
• Prototype Manufacturer: American Locomotive Company (ALCO)