Walschaerts Steam engine finally completed in November 2012. Only Lego and Lego Duplo brand pieces have been used. There are no modified pieces, glues, or lubricants. Invented by Egide Walschaerts in 1844, this devise was patented under the name Walschaert by his friend Mr. Fisher. Mr. Walschaerts worked for the Belgium State Railways, and anything that he invented while working there would have belonged to his employer. The Stephenson gear was patented in 1843, just one year before the Walshaert gear. The Stephenson gear was used almost universally outside of Belgium, while the Walschaert gear was used only in Belgium. It was only after locomotives became too large and heavy for the Stephenson gear that the Walschaerts design was more widely adopted. Walschaert is by far the dominant gear of the 20th century. This is not a Lego set. I have made building instructions for anyone interested. Please visit my BrickShelf gallery at http://www.brickshelf.com/c...
to view them. I have also provided a link from my YouTube channel.
Unfortunately, I could not make a curved link. I tried to set the valves so the error is at the center position of the link because the engine's pneumatic reversing mechanism does not allow it to run in that position. I still have the 2009 model which is seen near the end of this video. The model is the father to all my other engines because it set scale and design standards which the rest follow. My wife Tracy made the display case as a Christmas present. I was not allowed in the wood shop for several days. Special thanks to Sadie Green Sales Ragtime Jugband (sadiegreensales.com) for allowing me to use their music in this video. Many of the pieces were ordered from Pick A Brick at Lego.com and also Bricklink stores at bricklink.com. Please view my feedback (Brickhead) for a list of those very kind vendors. Hope you enjoy this video. Comments are welcome. Have a great day!