CLASS O MIKADO. The popular Mikado (2-8-2) was best exemplified on Great Northern by the celebrated O-8. The first three engines in this sub-class (3397-3399) were GN-built in 1932 and were the only locomotives constructed in the U.S. that year for domestic service. The O-8 was not only the heaviest Mikado type ever built, but the heaviest on axle of any steam locomotive, aggregating 81,250 pounds per axle. Originally designed steam pressure was 280 poinds, but this was later reduced to 250 pounds. Twenty-two rebuilt O-7's joined the O-8 class in 1944-1946.
From a Great Northern Railway (U.S.) brochure published around 1960.

Great Northern O-8 2-8-2 — Open or Closed Cab

Great Northern started by converting M-2 2-6-8-0s to O-7 Mikados, changing the boiler made them O-8s, This final configuration was very successful for the Great Northern. Notice the dual airpumps on the smoke box front. Glacier Green Boiler. Stunning... Reserve yours today.

• All Brass Construction
• Fully Detailed Backhead
• EOB in 3 Rail
• TMCC/ Railsounds 4.0
• Compatible with Legacy, DCS, TMCC, Conventional Control
• Coil Couplers
• Available in 2R or 3R
• 054 3 Rail Track, 56" Radius 2 Rail Track Compatible
• $1499.95 MSRP
• $1399.95 Reservation Price
• 2R Add $200 for QSI DCC and Sound
• Coming September 2012