The Robert Pearson Collection: Baldwin Air Locomotives

Although Porter ended up with the bulk of the pneumatic locomotive market Baldwin sold them first.

 

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Ashland Coal & Iron Railway Co.  Baldwin Construction No. 14975, 42" gauge, 9x14 cylinders, 28" drivers
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Baldwin Class 4-20-C, 52, 30" gauge, 13x12 cylinders, 28" drivers, 5' wheelbase.  Built for Hormiguero Central Corp., Cuba for plantation service
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Baldwin Class 6-54-D,1 built for Atchison, Topeka & Santa Fe Ry. 85 tons largest class of fireless locomotives built by Baldwin