In early 1999 I started converting one of the valve … one disadvantage of walschaerts and baker gear is the fixed lead regardless of cut off. 0394 Strasburg - Railroad Museum of Pennsylvania - Flickr - KlausNahr.jpg 3,072 × 2,304; 3.2 MB Notes to Valve Gear Animation Videos. It introduces angular elements of Marshall gear into Walschaerts’ in a complex yoke drive with a bell crank. baker blender3d gear locomotive steam valve Here is another valve gear I am building in Blender, this time it's the Baker valve gear. The remainder of the gear is the same, so that the return crank and combination lever take the same form, although the proportions are usually modified. Baker Valve Gear Simulator in Python What started off as a compile-time project has finally yielded some results. Southern Valve Gear. The Miniature Locomotive, November-December 1954 Baker valve gear, originally designed for traction engines, enjoyed some success in its home environment, America. The Baker valve gear replaces the expansion link of the Walschaerts gear with an assembly of levers and links which produces the same effect of allowing continuous variation valve travel. Since this gear is so capable of first class steam distribution equality it is disconcerting to find its suspension so poor in most traction engine designs. Caprotti valve gear invented in the early 1920s by Italian architect and engineer Arturo Caprotti based on automotive valves it uses camshafts and poppet valves. Walschaerts Valve Gear. As some of you are aware, my interests in engineering exceed computing and from time to time take the front seat for brief periods. Baker valve gear was designed in three different sizes, at least for inside admission valves; - Standard This was the smallest size gear assembly with a gear ration of 5 to 1, i.e., take the crank circle and divide by 5 to get the full cutoff valve travel (roughly speaking). Developments in RR Motive Power, 1948 ALCO Pacifics 1913 Bulletin NYC Travel Folder and B&A Travel Booklet C&NW Historical Booklet, 1942 Historic C&IM Publicity Booklet Century of Progress 1933-34 Chicago Railroad Fair 1948-49 Baker valve gear was the main competitor to Walschaerts valve gear for steam locomotives in the United States. Southern Valve Gear Applied to Inside Admission Piston Valve. The Baker valve gear replaces the expansion link of the Walschaerts gear with an assembly of levers and links which produces the same effect of allowing continuous variation valve travel. Personal memories of Baker My first dealings with the Baker Company were in the summer of 1917 when I took a set of 2' boiler tubes to them to be retipped, or a new piece to be welded on one end. Since then I have made continuous additions and improvements to add other types of valve gear and improve functionality and ease of use. and closes at 300 deg. Stephenson Valve Gear. Valve gear: While Stephenson gear is usually found between the locomotive frames, there are some locomotives with outside Stephenson valve gear. Control fluid losses during gravel packing with Baker Hughes's Multi-Cycle Fluid Control Valve (MCFCV). The remainder of the gear is the same, so that the return crank and combination lever take the same form, although the proportions are usually modified. Jul 15, 2008 #1 I have a valve setting job in progress following new babbitt in the mains on a 1921 Baker 21-75 Uniflow. Until around 1900 the Stephenson valve gear was almost universally applied to North American locomotives, but because its linkage is axle-driven inside the locomotive frame it is difficult to maintain and railroads began to favor external gears. and closes at 125 deg., the rear port opens at 178 deg. Strictly speaking it was not a valve gear but a variable expansion mechanism adapted to the Walschaerts layout replacing the expansion link and sliding die block. July 24, 2009 Previous Next Go to Decoders for HO Atlas Genset: November 1, 2010 Wishlist Data. The Baker valve gear had one operating advantage over the Walschaerts in that it could be set up for a larger valve with longer valve travel, 8-1/2" versus about 7" for Walschaerts, and was generally more rugged and could operate a heavier valve better. In 1986 I wrote the first of the MS-Dos versions of the software to simulate Baker valve gear. Baker Valve Gear Fundamental Geometric Relationships. The valve is then locked open to allow optimal production, without the need for intervention. Strictly speaking it was not a valve gear but a variable expansion mechanism adapted to the Walschaerts layout replacing the expansion link and sliding die block. ive only built 2 locos with walschaerts, 1 having 4 cylinders so the fixed lead is of less effect. It combines elements of the Walschaerts and Baker patterns. The Baker valve gear replaces the expansion link of the Walschaerts gear with an assembly of levers and links which produces the same effect of allowing continuous variation valve travel. Southern Valve Gear. Young Valve Gear . The valve incorporates multi-cycle tubing pressure applications to open and lock the flapper. The long-travel and long-lap types are used on larger locomotives that require wider steam ports to permit the passage of large volumes of steam. The mechanism of the Walschaert valve gear is entirely different than the general run of valve gears in that the resultant motion of the valve is due to two independent component motions; one motion is produced by the eccentric-crank-arm which moves the valve to a position of no lap plus no lead, while the remainder of the valve movement, lap plus lead, is actuated by the crosshead. These tubes were from a 10 HP Nichols and Shepard steam traction engine, no. The Baker valve gear is made as three different types — standard, long-travel, and long-lap. The following comes from a “Is it just a Phantom” – David Wardale’s response to Herr Ebel published in Lok Report in March 2001: “It should be noted that needle roller bearings were an integral part of the American Baker valve gear, and are extensively used on Walschaerts valve gear on Chinese locomotives, operating successfully in a rather harsh environment.” The ones I saw were in Denmark. by Carl Purinton. Share: Go to Turbine Lift Off! Berkshire Jim Kreider posted on Facebook, August 2018: As a "Mech Engineer", you may be interested that the Baker valve gear, where the "gear" itself is the linkage connecting the eccentric rod (attached to the return crank) to the valve rod (attached to the valve), that "gear" may be understood as a four-bar linkage from mechanism design theory. The Baker valve gear shares many of the same operating principles as that of the Walschaert valve gear. In June 1880 the London and North Western Railway fitted it to a new 0- 6- 0 … Southern valve gear was briefly popular on steam locomotives in the United States. In my simplistic terms it would appear that in full forward gear looking at the right hand side the front port opens at 358 deg. Baber Turf Equipment Co. Unit 6 / 10 Firth Street Auckland 2113 New Zealand 09 294 6040 Email Us 3447 built in 1893, left hand steering and no friction clutch. Baker Valve Gear Setting Questions (Traction Engine) Thread starter Nick Stanley; Start date Jul 15, 2008; N. Nick Stanley Guest. This valve gear was especially adapted for locomotives with valves above or below the cylinders; it was tried on an old Bury type goods engine on the Furness Railway and proved, successful. Baker valve gear invented by American engineers in 1903 and widely used in North America. Category: Tony's Tips, Locomotives & Miscellaneous. Share your thoughts, experiences and the tales behind the art. Whatever your well’s geometry or requirements for continuous or intermittent lift, we have a valve solution to optimize your operation. Baker Valve Gear. Baker valve gear was the main competitor to Walschaerts valve gear for steam locomotive s in the United States. Media in category "Steam engines with Baker valvegear" The following 31 files are in this category, out of 31 total. I have spent the morning watching the simulator for outside admission Baker Valve Gear and trying to get my mind round it. The remainder of the gear is the same, so that the return crank and combination lever take the same form, although the proportions are usually modified. Considered more … These types cater for valve travel up to 9 inches. Baker valve gear drawing for 1-inch scale SP Atlantic by Lester D. Friend, from "The Miniature Locomotive", May-June 1953. The Baker valve gear had one operating advantage over the Walschaerts in that it could be set up for a larger valve w/longer valve travel, 8-1/2" vs. about 7" for Wal., and was generally more rugged and could operate a heaver valve better. Valve Event, Cylinder Event and Valve Ellipse Diagram Explanation PDF. The Baker Locomotive Valve Gear was the invention of Abner D. Baker (born 1861), whose A. D. Baker Company manufactured steam-powered farm equipment. Although it moves properly when the wheels rotate, I cannot get it to "shift" from forward to reverse like it does when you shift it in the Dockstader sim. Gas lift valves from Baker Hughes ensure efficient gas injection to maximize your oil production. Richard Leonard’s Baker Valve Gear Unit Course in Locomotive Firing Modern Power for Today’s Trains, 1949 Mod. hi john, don has tactily suggested that Stephensons gear is the best - read between the lines re baker valve gear! 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