When it comes to uneven trackwork, when wheels of a steam loco went up or down on one side, were the rod bearings of the type that allowed for this movement as the crankpin was no longer perpendicular to the rod? In the youtube video about the UP 844 Highball at 75MPH, you can really see the suspension at work on the closeups, and made me wonder about the rod bearing stresses other than power transfer.
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CALNNC posted:When it comes to uneven trackwork, when wheels of a steam loco went up or down on one side, were the rod bearings of the type that allowed for this movement as the crankpin was no longer perpendicular to the rod? In the youtube video about the UP 844 Highball at 75MPH, you can really see the suspension at work on the closeups, and made me wonder about the rod bearing stresses other than power transfer.
There is sufficient clearances designed & machined into the plain type, i.e. NOT rolling bearing, rod bearings. In addition, there is lateral clearance within the axle driving boxes to the frame, even on roller bearing equipped locomotives.
A good question I had never thought about. Thanks for asking it, and the answers provided.
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