Wheels of Time 50160 N Scale 53'6" General Service Flatcar Western Pacific WP 2231 Rocket Motor - Bulk 1737 was the first K-4

1737 was the first K-4 produced for the Pennsylvania Railroad

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Wheels of Time 50160 N Scale 53'6" General Service Flatcar Western Pacific WP 2231 Rocket Motor - Bulk 1737 was the first K-4Wheels of Time 50160 N Scale 53'6" General Service Flatcar Western Pacific WP 2231 These 53' 6" flatcars were constructed with a welded fish belly steel frame in contrast to the cast steel GSI frame. The fish belly frame provided an optimal distribution of tension and compression forces from the center of the car to the bolsters. Think of it as a bridge. In addition, fabricating a welded frame was far less labor intensive than an equivalent riveted