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I have been following along with some discussions in another thread, and the more I read, the more confused I get (more confused than my normal confusion). I have seen some proposed forumlas for calculating the venturi dimensions. Discussions of how carburetors scale down from a full sized...

Any metal implement/tool that comes in contact with molten metal must be preheated before contact is made. This includes adding scrap to a furnace, preheating ingot molds, skimmers, ladles, etc. Metal tools, ingot molds, etc. may appear to be perfectly dry, but apparently it has residual...

I have posted photos of my dad's model engines, two Roper steam bicycle replicas, and Stanley Locomobile replica, but they are buried in another thread. Dad was a prolific model engine builder, and a retired machinist/repair person, who also operated two full sized steam engines for the family...

I found some interesting information about flat plane vs cross plane crankshafts on engines, and also firing order considerations. A rather involved topic, but interesting. .

Starting a thread here for power distribution systems, including medium voltage system, and PLC-based control systems. This is for the hard core power/controls folks out there in power land; otherwise consider this rather tedious and boring reading.

Here is a good video on the commercial lost-foam casting process.

The annual FIRE exhibit is coming up May 29 - June 2, locally in Memphis TN, at the Mississippi River bluffs, Metal Museum site. I am trying to decide if I want to go "full leathers", or just attend as a spectator. The heat and humidity during the day in these parts can be brutal, which is...

If you are into steam locomotives, this video may interest you. Quite fascinating that some countries used steam locomotives until quite recently, I guess due to an abundance of coal I guess. Lots of very nice machine tools left underground. The parts laying around are fascinating; rods...

We will drive over to Arkansas somewhere before April 8th. Lets hope we don't get stuck in traffic. Some say there will be 1.5 million visitors in the immediate AR areas where we plan to go. Should be interesting if there is clear weather. 4 minutes total eclipse where we are going. ...

I have been drawing professionally for 29 years, both manually on the drawing board, and on computers. Recent discussions involve mixing up symbols for first and third projection. I have to admit I have never used these symbols, and would not know what they look like if I saw them. Can...

Is there any interest in expanding the "Home Foundry and Castings Section" of this forum, to include separate folders for things like "Foundry Construction", "Investment Casting Methods", "Sand and Molding Techniques", "Casting Defects", "Pattern Making", etc. ? It seems like once a topic goes...

I am breaking off this thread from another one, because it is off-topic from the original thread where it was posted. From the other thread: I recall seeing Brian Rupnow's work in Solidworks on this site in perhaps 2008, and I remember thinking "This is the future of model engine engineering"...

I have seen some recent discussions about how best to fill 3D printed patterns, so that the lines don't mirror over into the molding sand. I think some have mentioned some methods here previously, but here are my ideas based on some recent discussions I have seen. One person mentioned "high...

Barney Kedrowski has finally succeeded in getting his friend's rare "Julien" hit and miss engine running, after a significant restoration effort. Barney is the person who took photos of his Ball Hopper Monitor for me, which has allowed me to create a nice 3D model of that 4hp engine. A very...

Perhaps I am the last model IC engine builder on earth to discover this book, but I am new to model internal combustion (IC) engines and their ignition systems, and so am just now discovering this great resource, by Bob Shores. This book clears up a lot of the mysteries surrounding model...

Here is a continued discussion of how to calculate steam engine horsepower. .

Can anyone identify the circled part. This is not my photo, but rather a random photo from the net. I saw a resonably priced fully machined 10V kit on ebay, with a low bid on it, so I bid 2 more dollars, and I won the bid. The advert says "Some missing parts", and the one I notice is the...

I ran across this individual on ytube. I had not seen his videos before. He has some very interesting videos; I am in the process of watching some of his videos. https://www.youtube.com/@enginecoot/videos .

This is an unnofficial announcement (I am not affiliated with these folks), about the model engine show next year that will be held at the National Auto Museum. Apparently our member "55fairlane" is heading up this effort. Please support him in this endeavor if you can. I don't know much about...

The Frisco Standard marine engine is on my list of iconic engines that must be documented, saved, and reproduced in castings, for posterity. I have made quite a bit of progress on the 3D design for a single-cylinder Frisco Standard, and have been keeping an eye on potentially modifying the...