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[quote]QUOTE: Originally posted by Murphy Siding I did a bunch of reading on this subject today. However I'm thinking that you're a little dimensionally challenged on this: The driver wheels are 4'-8" apart. The side rods are connected to the outter face of the drivers, at the outside radius. Height wise, the rods are a little taller off the ground than the drivers. No matter how you offset the connecting rods outward, the dimension between the drivers will remain about 4'-8". The *old* steamers had the fire box between the drivers- therefore less than 4'-8" wide. The *newer* designs looked like the firebox was moved back, behind the drivers and no longer resrained to 4'-8" dimensional width. To carry the firebox weight, it looks like either 2 or 4 trailing wheels were added. [/quote] Murphy - Email your mailing address and I'll send you a drawing so you know what I'm talking about. It would be relatively easy to fit a 9' x 9' firebox in between a set of drivers which are 9.5' apart lengthwise and rods which are extended outward from the drivers at 9.5' apart widthwise. Whether the weight of a larger firebox can be suspended between the two sets of driving wheels is another question altogether.
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