BLI 8493 N Scale M1a 4-8-2 Steam Loco Pennsylvania PRR 6712 - Stealth DC Alaska Railroad ARR parallel-twin two-stroke engine

parallel-twin two-stroke engine

To achieve such numbers

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BLI 8493 N Scale M1a 4-8-2 Steam Loco Pennsylvania PRR 6712 - Stealth DC Alaska Railroad ARR parallel-twin two-stroke engineBLI 8493 N Scale M1a 4 8 2 Steam Loco Pennsylvania PRR 6712 Stealth DC The M1a's and M1b's are 4 8 2 "mountain" type steam locomotives operated by the Pennsylvania Railroad. Used primarily for hauling freight, many PRR crews regarded the M1's as the pinnacle of the railroad's steam power. Standout features on both classes are the square shouldered Belpaire firebox, the 72 inch driving wheels, and a large cross mounted air tank positioned at the front