QUOTE: Originally posted by selector For close-set drivers, as on most steamers, HighIron, wheelbase IS a funtion of the combined diameters of the fixed drivers when concerning curves. This is easily tested by calculating what the wheelbase would be for four 55" drivers vs. for four 69" drivers. The difference of 14" per driver times four drivers is a whopping 56", and clearly establishes a minimum radius of curvature for the loco with the larger drivers. N'est-ce pas?
Chip
Building the Rock Ridge Railroad with the slowest construction crew west of the Pecos.