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...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). Whatever...
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By the way, Walschaert gear is correct; Walschaerts gear is not (unless it is used in the possessive case, with an apostrophe, eg: "Walschaerts' design"). The inventor's name was (Egide) Walschaerts (pronunciation: ay-gee-d val-sherts), but the design was patented under the name Walschaert for political reasons. Ref: Publications Style Manual, Pennsylvania Railroad Technical and Historical Society. |
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Some of these illustrations my help answer the question: "How does a steam locomotive work?".
Links (Locomotive, Steam, Walschaert)...
- SteamLocomotive.com
- Comprehensive data and history of North American steam locomotives [History of Pacific type]
- Locomotive Boilers and Engines
- 1920 Purdue University treatise on locomotive boiler and engine design, construction, and operation (San Diego RR Museum). Includes a Walschaert Gear page.
- Locomotive Engine Running and Management
- 1890 Book on locomotive operation -- things like Chapter 5: ...Pulling Out - Hooking Back the Links - Working the Steam Expansively - Advantage of Cutting off Short...
- How a Steam Railway Engine Works
- Nice images and descriptions of locomotive hardware, with another Walschaert animation (UK)
- Steam Engine Valve Gear On The Computer
- Downloadable freeware simulations of every kind of valve gear you've ever heard of by Charles Dockstader (CA). We're Mac heads here, but we downloaded his .exe files and borrowed a Wintel machine to try them out and were impressed with this work; very cool and enlightening.
- Locomotive Basics - valve gear
- Text and JavaScript diagrams of the Walschaert gear. Also Valves & Pistons (lap & lead), and Cylinder design (PV indicator) (UK)
- Steam Engine Slide Valve Animation
- Valve timing diagrams with lap & lead illustration (UK)
- Railroad Paint Shop
- Line drawings (GIFs) of locomotives [steam loco drawings]
- SteamCad.Railfan.net
- Collection of AutoCad Line Drawings of U.S. Locomotives. Link to a 1.3M "Drive Assembly" (Walschaert gear) AVI animation file.
- WalschaertValveGear
- I can't read the Japanese characters on this site, but it's worth the trip for the Big Boy valve gear illustrations.
- 3D Walschaert Gear Movie [warning: 1.15M Quicktime movie]
- Fossinn Graphics AB is a 3d computer graphics and animation company (SE)
- Chippewa Valley Railroading Information Page
- Soo Line #2719 ALCo H-23 Pacific 4-6-2 (WI) -- nice restoration images
- California Trolley and Railroad Corporation
- Southern Pacific #2479 Baldwin P-10 heavy Pacific 4-6-2 (CA) -- under restoration
- Frisco #1522 (Baldwin 4-8-2 Mountain)
- St. Louis - San Francisco Railway Steam Locomotive 1522 and the St. Louis Steam Train Association (MO) -- good FAQs page and photo gallery.
- Baker Locomotive Valve Gear
- Richard Leonard's page of historic Pilliod Co. spare parts catalog -- one should be able to figure it out from the "page 4" and "page 14" images.
- How do we get make-up water into an operating high pressure boiler? Here are some sites that explain "How does a steam injector work?"...
- UK Heritage Railways - Injector Magic
Bluebell Railway - How the Injector Works
Locomotive Engine Running and Management - Injectors
Steam & Engine of Austrailia - Water Injector
- Walschaert Valve Gear - Wikipedia Encyclopedia
- Wikipedia Encyclopedia is using several of our images on this page.
- Virtual Guide to WP Locomotive of Indian Railways
- Macromedia Flash interactive animation of an Indian 4-6-2 locomotive (488 MB)
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