Inside/outside frame power

rrmanOGR Forum Member

I was given a Pentrex , Cumbres & Toltec cab ride VHS tape (remember VHS?? ). The commentator mentioned that the engine being an outside frame configuration (driving rods connected to counterweights whose axles extended to wheels inside the frames), delivered more power than a normal inside frame configuration (driving rods directly connected to wheels outside frame) would.

http://cs.trains.com/mrr/f/11/t/66176.aspx

Wondered if this was true statement. Assuming engine weight, cylinder size and steam pressures etc. could be made equal between inside and outside frames, wouldn't the available drawbar pounds be about same? I realize the C&T is smaller narrow gauge compared to standard gauge engines, so wonder how this was true, or basis for this statement.

1/17/171:13 PM

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