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I could have used an extra hand taking the measurements needed to estimate the radius of the trunnion shaft guides. I inserted an 1/8 drill bit in the steam passage and measured across two transfer punch rods and averaged the distances to come up with 4.050 radius The order of operations seemed...

more photos from yesterday CFLBob, it looks like it may rain today but the fair is open... they routed the hit and miss engine exhaust at the machine shop to a fake cannon to draw visitor's attention A babbit bearing scraper set that was razor sharp and a ingot of babbit with a lot of lettering...

What a great day at the Flywheelers swap meet and antique engine show. I've been attending for over ten years and still saw things I never noticed before Strange steam traction roller converted to gasoline engine. The 1/2 scale Avery replica steam tractor is a beautiful engine and so docile...

Made the slide valve, valve spindle and some oil cups with covers. Used a shop built ball turner rather then the radius tool for the brass balls that go onto the mains covers. I had some 5/32 303 SS and fabricated the eyes for the valve spindles by brazing. First attempt was using a 6-32...

Thank you sir Camelot, That sounds right to me. I have had the same effect when using a radius tool making parts like the wheels on a tubing bender. No chatter if I used a smaller radius and worked side to side cutting a small amount on tangent. Once the full radius "bites" it goes badly as the...

Good eye KVOM, I hadn't noticed that the piece was pulled out from the collet also. Maybe it wasn't gripping tightly on the threads and that's why it grabbed and spun. I remember tapping the flanged part against the collet so it would resist bending. thank you

Thank you for the compliments, The valve spindle guides didn't go so well. They roughed out okay in a single setup, being drilled and reamed then threaded and undercut. It was the radius feature that went sideways. I watched someone on video use a rounding over endmill as a cutter in the...

Valve plate material that I had planned on using was a scrap of 304 SS 0.120" plate left over from a heat treat oven build. Not a good choice because of work hardening. Snapped a brand new 3/8 x 1/8 endmill and left a jagged mess on the slots that were cut before it snapped. That got thrown in...

Continuation of steam chest. Used degree block and set part in vice, swept indicator across front to back to ensure parallel because I only have one set of degree blocks. Its typically off a lot and it was. "Tappy-tap-tap and Bobs your uncle" as some people say ☺️ . Milled out the internal...

Hello again, Thank you Peter. I believe anyone in this hobby has some compulsive behaviors. I recall knocking a shelf down accidentally that held 4 drill indexes and reamers. I tried to just turn off the lights and go inside, but I couldn't. Sat there on the floor and mic'd each of the small...

Hi Toad, A hardware store will sell a small quantity in the plumbing aisle. Ace Hardware sells 2 ft for $3 for valve packing. ace hardware graphite I believe graphite packing is superior to Viton o-rings because it conforms to any non-concentricity of the packing and stem. It also swells a...

If you are anywhere near southeast of nowhere, this is always a hidden gem https://floridaflywheelers.org/

Thank you everyone for following along and the nice comments. Here is the link to a video of it making mouse-power Miniature Tunnel Ram V-8

Last parts were the cooling system. I didn't save any pictures of the water pump, pulleys or fan but pretty much followed what others have done and made the fan little larger and added a shroud. The radiator was made a little different in the way the fins were spaced. I made a bunch of little...

Green Twin, Terrific thread. Really enjoyed the explanation of the displacement curve and the beautiful engravings. In an earlier post you said: "It should be noted that a D-valve is not rigidly connected to the valve rod, to allow the D-valve to move in/out slightly, and move closer to the...

Thank you Captain John! I work with many Navy veterans who gave good advice to help me with this. They were all amazed when I brought the engine into the shop and ran it for them. They often support my hobby by saving small bits of scrap for me before sending it to the dump. Thank you for your...

Thank you Peter, Appreciate the likes from KVOM, Richard and Stan I kept thinking about brazing these parts also, but was committed once I started one of them. I think I will give brazing a go on the valve links as they appear to be about 75% waste also. Curious if you folded the yoke or...

The big end of these rods uses a through bolt and a small block I called a keeper that needs to be removable, but a tight fit. I made them out of the same 1215 round bar stock by slitting them and side milling to a close fit, and thru drilling while still attached to the parent material. Another...

TIG welding aluminum is a very difficult thing to do for a novice. I was set on making an aluminum fuel cell rather then a brass tank for this project, so I buckled down and watched dozens of videos on the subject. I ended up listing all of the variables and only changing one thing at a time...

The connecting rods seemed reasonable to be next to make. They are unusual in the big end similar to the crossheads. Mr. Muncaster favored rectangular bearings and wedges. Original plan states that they are to be forged, but I lack any blacksmithing facilities so chose to carve out of 1" 1215...