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Okay, it looks like mikelkie has decided to take over Baz's build thread with a 7-1/4" Super Simplex build. This is a pretty strange thing to do. I guess we'll just all go with it as it looks like the hijack is "Full Steam Ahead and" no body has even flinched! Most folks would have started their...

Seems like the documentation of a Simplex build other than Baz's, belongs in a new separate thread? Up to this point, this thread was about Baz's Simplex and other folks giving suggestions and help for his build. David

Hi Baz, Well, sorry to hear this information from you. I had a feeling it might go this way. I'm not sure why you would have to strip everything down to get it running on air. I assumed everything was adjusted as you went. If you don't have a compressor, or funds to complete, this is probably...

Hi Baz, I have not checked up on you in a while. Things are looking good! I like your smoke box and door. Very good! Looks like you decided to not machine the radius on the door front, left as raw casting? David

Awesome! A Myford lathe! Good for you. I hope you can get it all sorted out and running. David

Hi Barry, Good to see you are trudging on! So sorry everyone got sick at your place! I hope everyone has recovered. Carry on, looking good! David

Hi Baz, I remember when my loco was close to running on air, I did everything I could to make that happen as soon as possible. I only worked on those things that would bring the loco closer to running on air. All of the glands are filled with graphite string, no O rings. Gaskets were made as the...

Hi Baz, Nice bit of tooling for your drill press. Have you been able to get a fitting for compressed air to connect to the steam supply to the cylinders? David

Hi Baz, Well, thank you so much! Merry Xmas to you and yours as well! We have about 6 inches of snow on the ground right now, it is beautiful. The locals folks hate it, but, I love it. My thought is, if you don't like it, you should move! Okay, screwed connection for the smoke box to boiler...

Hi Baz, Do you have the boiler barrel to try for fitting to the ring? For connecting the boiler to the ring, you might consider using button head screws instead of rivets. It will be handy to be able to take this joint apart. David

Those kinds of "scratches" are called "apprentice marks"!! We all have them here and there! David

The mark left by the milling machine is not too bad. It will get painted anyway. How did it happen?? David

Thanks for the reply. David

Nice start Sura. Tell us more about the locomotive you are building. Is it your design, or, is it a published design? What is the gauge? David

Hi Barry, Straight threads on the steam pipes, hmmm... This will be a potential leak point if there is no shoulder to screw against. The lock nut shown on the drawing will help prevent leak when installed with a little thread sealer. It looks like your steam supply pipe will include a lock...

Hi Barry, As promised, here are the drawings of the axle pump that goes into the Super Simplex. I do not know if it will fit into the same space for the Simplex. I do not seem to be able to attach photos to PMs. David

Hi Barry, Looks good! I now understand how your exhaust and steam pipes will assemble. Should work just fine. The fitting that screws into the side of the cylinder may eventually need some sort of high temp sealer on the threads. Is this a straight thread, or, tapered like a pipe thread? David

Hi Barry, That should work okay as long as you are able to get a wrench onto the compression nut with everything else in place. Are you going to do the steam supply in a similar manner? David

Hi Barry, I will have to see how your fittings will be assembled. It is not clear how everything will be screwed together. If you were to ever need to remove a cylinder, or steam chest, I'm not sure how it would be done. I will follow along and see what you have in mind. I made my...

Hi Barry, Yes, I certainly did not want to make the eccentric rods twice, which is one reason (as you have guessed correctly!) for waiting so long to make the final version of them. Running with adjustable rods is nothing to be ashamed of. I did it for months at my club track under full steam...