Welcome to my channel. Please visit BrickShelf to see photos, info, and some video of my models. A link is provided below. I hope you like them. Thanks for visiting.
Can you still get the building instructions for this, I have recently finished Paul Krieg’s Walshaerts engine and I am eager to build more, yours looks fantastic!
I have just built this wonderful model, although many parts are now quite hard to come by. Still awaiting a miniature air pump for the revering gear, but runs well. Thanks very much 😊
Strasburg Railroad in Lancaster County, PA for Unforgettable Experiences on Authentic Train Cars,..,; ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5KGdNLbj-RA.html
Thank you once again for the instruction, Paul. I enjoyed the build very much. There are so many clever solutions and tricks in your design. I had to make some minor changes, mainly because of limited space and material. Although I had to be very careful with most modifications because in your design every detail plays its important role. Today I completed it and it works surprisingly smoothly. Thank you for a wonderful experience. Here is a picture of my version: www.brickshelf.com/gallery/tacvud/Walschaerts/walschaerts_75.jpg
Wow!! You did a great job! You have made some changes that I will also keep in mind for my own engines. You did all this so quickly. Thank you so much for sharing it with me!
I can hardly accept any compliment. I just followed your highly professional instructions where each step is clearly documented. My main modification is the flywheel where I had to make it smaller and avoid some rare and expensive parts. Do you mind if I make a video and place it on RU-vid - with all credits to the original author, obviously?
I am glad to know my instructions worked for you. Is there any trouble with your flywheel holding together? I like your design. Please feel free to share your engine as you like. I look forward to seeing your engine running. You have very interesting videos and I have subscribed to your channel.
I found this video a few days ago and since that time I have replayed it many many times, in order to watch, study and admire all those technical details you put in this wonderful construction. I would never say that something complex like this can be built (and run) from Lego. Thank you so much for the instructions. I simply could not resist and started to build, though with a limited brick supply only. So far I have made one half to prove how it works. And ... it really works! Now, I will rebuild it again after learning which places are the most critical, e.g. for a smooth movement of the piston inside the valve. And yes, now in the correct green-red outfit which is so fantastic. Do you still have it at home and run it occasionaly?
I am not an expert on this, but I think there was debate over whether Baker or other types were most efficient. I believe one of the main reasons for converting to Baker was the elimination of sliding link joints present on the Walschaerts or Heusinger gear. Baker uses pins which were supposed to be more reliable and replacements could easily be stored.
Are the cylinders built entirely purist, or have you added something to make them more airtight? Also, are they built like normal expansion cylinders, or have you changed something so it runs on vacuum instead of compressed air? (Or have you just reversed the vacuum to blow air?)
Entirely purist; not airtight. It doesn't use the expansive power of steam or compressed air. Where movement's concerned, its reasonably close to the actual thing, however, I can't make a curved link. Vacuum or compressed air? It'll run either way. It'll run if you blow into it without putting your mouth against it. This particular engine would be considered outside admission, meaning the steam enters from outside the valve & exits through the center. When operating with the vacuum I'm "pulling" the "exhaust" out the center port which, in essence, makes the air in the room the "steam" entering the outside ports. I couldn't take advantage of expansion because Lego's leak. Compressed air into the center will run, but not as well. A way to tell if an engine is inside or outside admission is the valve stem is pinned to the combination lever above the radius rod for outside & below the radius rod for inside.
What a fantastic build, definitely going to check out the instructions as I've been looking into building something like this myself. Big props to you!
+Brett Cheeseman Building instructions: www.brickshelf.com/cgi-bin/gallery.cgi?f=516057 Yes, it is expensive. If you build a single cylinder and do not worry about colors it gets much easier.
+CUBE Saldude1 If I understand correctly that would work fine as a compression ring as in an arch or the top of the Pantheon in Rome, but a flywheel tends to explode unless it is bound together.
wonderful job! Only thing I noticed was serious play in the bell crank when you were in center position; thus is why the valve was almost inactive. Wonderful engine!
Outstanding vid, Paul! This is really something I have to go to soon, that "light" show at the end is incredible. I've got to ask, did someone really have a Lego wobbler at the model engineering exhibit, ha ha?
Still my all time favorite! Hope you and your family are still doing well. Had to make a new account because of all the google nonsense, and I wanted to see if you were still building. I'm just gettin' back in; got a new design for a curved expansion link finished and can't wait to try it out. Best wishes, and of course happy building!
Mechanicsnut Thank you. Sorry for the late response. I haven't been checking in. We are well, thanks. This time of year we are getting the old tractors out to play. I've only tinkered a little with small bits. I would love to see a successful curved expansion link.
+Kyle Swartfager "Rail Road Medley" by Sadie Green Sales Ragtime Jugband. You can find them at www.sadiegreensales.com . The song is number three on their "Jugband Mania" CD.
Thank you. The engine demonstrates a Walschaerts expansion gear. It was developed for steam locomotives to improve the use of steam expansion in the cylinders from neutral to full forward or reverse. The model is stationary because that is more practical in this case. But it was important to be able to run at high speeds and to be able to reverse the direction. Because it is more complicated it did not catch on until heavier trains made it necessary. Another advantage on locomotives was it is mounted entirely on the outside of the frame giving easier excess for servicing. Regards.
I have a list. It will take some time to provide. I made building instructions. You can find them on my Brickshelf account. Search for members "paul-dieter" at brickshelf.
I finally found the Parts List for any one interested... www.brickshelf.com/cgi-bin/gallery.cgi?f=566628 Building instructions are at the same site. If there are specific questions, please ask and I will try to address them. Thanks
Again truly outstanding work,,, as a lad between 10 and 15 my Dad took me all over the country searching out all the colliery winding engines and all the mill engines in the woollen and cotton mills of Yorkshire and Lancashire, Would I be right in saying the other advantage of the Corliss valve gear was the saving on fuel, because the valve opens to admit steam,,,, but then it can be cut off or closed much quicker, there by with the minimum of steam admitted if allowed the full expansion of the steam in a closed cylinder. To replicate such a mechanism using only standard parts is outstanding ,,,,,
Thank you so much! It sounds like your father was very interested in machinery as well. Very nice! I believe you are right about using the expansion properties of steam. The dash pots were a major challenge.
Sometimes I press assembled pieces on their side against a level surface to help line them up during critical phases of construction. Careful attention is paid to the condition of each piece. Nicks and scratches can be very bad. Having a design that lines up laterally, horizontally, and vertically is important, especially when parts are sliding to and fro. To see Piston and Rod and Cylinder construction- please see my Brickshelf gallery, click Walschaerts } ...gInstruction } PistonandRod, etc.
Thank you! It means a lot to have such a positive response from you. This is the engine that inspired me to study and build the baker in Legos. During that process I chose to build Walschaert first. So I guess it inspired both. It was nice to revisit this destination of countless bike rides from my teen years and early 20's.
Really nice job! I am currently building something similar, but mine will be solenoid powered, and only a single cylinder, this valvegear is fascinating :)
