Wheels of Time 50145 N Scale 53'6" General Service Flatcar Southern Pacific SP 507780 Aircraft 1/32 The use of steel as

The use of steel as the primary car building material not only increased the strength and longevity of the cars

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Wheels of Time 50145 N Scale 53'6" General Service Flatcar Southern Pacific SP 507780 Aircraft 1/32 The use of steel asWheels of Time 50145 N Scale 53'6" General Service Flatcar Southern Pacific SP 507780 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