The Steamboating Forum

My largest attempted iron pour was about 60 lbs of iron.
My largest successful iron pour was about 30 lbs of iron.

These days, I think I could relatively easily pour 90 lbs of iron using a lifting crane and a pouring cart, both of which I built.

The green twin started as a whim to learn 3D modeling, and turned into a mission to master pouring gray iron, which I finally succeeded in doing.

It was no longer about building a model engine, but rather learning how to cast engine parts in gray iron.

I have a lot of engines I would like to cast at this point.

Here is a Dake that I have 3D printed the patterns for.

I would really like to cast a Frisco Standard single, with a 3" bore, and am approaching completion of that design.

I plan on casting the helical gears for the valve train.

Here are the helical gears I will cast for the 3" bore Frisco Standard.

The are the same diameter, but give a 2:1 ratio, which is a bit of a trick.

I got a notice today that the last part of the multi-part green twin magazine article series was on its way in the mail.

So time to open up the original green twin thread, which I had kept concealed so as to not preempt the magazine article.

I still don't have the drawings up yet, but will post those at some point on 11x17 sheets.

Pat J

Here is the introduction thread, which contains links to all of the various build threads for the green twin.
https://www.classicsteamengineering.com ... post-24343