Thought you all might be interested in the mimimum recommended radius for the Bachmann outside frame consolidation. It is listed at a radius of 197 feet. That's 49.25 inches in 1/4 inch scale. the usual 22 inches works out to 88 foot radius.
Take your hats off to the engineering staff at Bachmann for this capability. The ET&WNC 4-6-0 is listed at 253 feet or 63.25 inch radius. These are Baldwin factory figures