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Murphy - I explained the changes from the drawing in a previous post. The drawing is exaggerated soley for the purpose of explaining the basics. You are not going to have a 2' long crankpin, rather you will have more like a pyramid or cone extending outward from the wheel, reason #1 to provide component strength, reason #2 to spread the dynamic force over more of the wheel, which should reduce rail pounding. <br /> <br />The second thing I mentioned is angling the main rod outward from the cylinder to the first wheel, and all wheels would be pyramided/coned outward by necessity. Otherwise the first side rod "tight" to the wheel would interfere with the conical wheel. <br /> <br />But as you say, a lot of engineering for what? I cannot answer the main question of whether having large diameter drivers, a large firebox, and no trailing truck to support it (e.g. more weight on drivers) is any advantage over any other steam designs.
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