![]() ![]() We enhanced this boiler backhead image (88K JPEG) with labels for our friends at the Danbury Railway Museum (CT). See some of the controls in a locomotive cab. Why are the main driver counterbalances not symmetrical? (30K GIF)Ĭut-away illustration of a steam locomotive's internal workings. Some of these illustrations my help answer the question: "How does a steam locomotive work?".įor thermo techies, here's a Steam Engine Pressure-Volume Diagram. Ref: Publications Style Manual, Pennsylvania Railroad Technical and Historical Society ( PRRT&HS). The inventor's name was (Egide) Walschaerts (pronunciation: ay- gee-da val-sherts), but the design was patented under the name Walschaert for political reasons. Whatever.īy the way, Walschaert gear is correct Walschaerts gear is not (unless it is used in the possessive case, with an apostrophe, eg: "Walschaerts' design"). Why?! It's just an experiment to try to satisfy a fascination held with this mechanism ( Walschaert valve gear 54K GIF) since childhood (late '40s). (270K GIF)Īn even larger version with animated cycling of the cutoff and reverse linkage action. Here's a larger version, with 'color coded steam' and sound. Steam Locomotive Walschaert Valve Gear Animation Steam Locomotive Walschaert Valve Gear Animationīased on 4-6-2 Pacific, Soo #2714: images, data ![]()
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