(BLEMISHED, MISSING WATER VALVE ON SHELL, AS IS, SEE PHOTO) BR5821 UP Challenger 4-6-6-4, #3985 Excursion Locomotive, Oil Tender, Black & Graphite, Paragon3 Sound/DC/DCC, Smoke, HO

The name Challenger was given to steam locomotives with a
4-6-6-4 wheel arrangement. This means that they have four wheels in the
leading pilot truck, which helps guide the locomotive into curves, two
sets of six driving wheels, and finally four trailing wheels, which
support the rear of the engine and its massive firebox. Each set of six
driving wheels is driven by two steam cylinders. In essence, the result is
two engines under one boiler. The Union Pacific Railroad sponsored
development of this type to meet the need for higher speeds in main-line
service. Historically, articulated locomotives had been limited to slow
speeds by factors inherent in their design. The technical breakthroughs
achieved with the Challenger enabled the carrier to develop the Big Boy
with the same speed expectations. Speeds in excess of 60 M.P.H., while
unheard-of on other railroads using articulated steam locomotives, became
commonplace on the Union Pacific.

Industry-Leading
SOUND Features:

• Operates in DC & DCC (use DCMaster
  for DC Sound)
• Record & Play Operation - Records and
  plays back sounds and movements once or repeatedly for automatic operation
  
• 16-bit Sample Rate for exceptional
  high frequency sound clarity
• Playback Whistle for multiple whistle
  lengths and patterns
• Choice of 3 selectable Whistles
• Alternate Whistle / Horn where
  applicable for locomotive with air horn and steam whistle - both the main
  whistle and alternate can be easily played
• Adjustable bell ringing interval for
  faster or slower bell
• Numerous user-mappable functions with
  available keys
• Johnson Bar or Power Reverse Sound at Direction Change
• Passenger Station Ambient Sounds -
  Controlled with Function Key
• Freight Yard related radio chatter -
  Controlled with Function Key
• Lumber Yard Ambient Sounds -
  Controlled with Function Key
• Farm related radio chatter - Controlled with
  Function Key
• Crew Radio Communications -
  Controlled with Function Key
• Maintenance Yard related radio chatter -
  Controlled with Function Key
• Demo Mode for display and
  demonstrations
• Grade
  Crossing Signal - Controlled with Function Key
• Simple Programming with Integral DCC
  Decoder
• Automatic Forward / Reverse Signal -
  When activated, stopping triggers and stop whistle toot. When moving forward
  from a stopped position, toots twice. When moving in reverse, toots three
  times.
• Chuff sound intensity varies with load
• Individually adjustable sound volumes
  for most effects

**Specifications on this page subject to
change.