Green Twin Complete

A special section just for steam engines and boilers, as without these you may as well fit a sail.
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PatJ
Lighting the Boiler
Lighting the Boiler
Posts: 37
Joined: Mon Mar 05, 2012 5:23 pm
Boat Name: To be determined
Location: Central USA
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Re: Green Twin Complete

Post by PatJ » Wed Nov 17, 2021 8:18 pm

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.

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User avatar
PatJ
Lighting the Boiler
Lighting the Boiler
Posts: 37
Joined: Mon Mar 05, 2012 5:23 pm
Boat Name: To be determined
Location: Central USA
Contact:

Re: Green Twin Complete

Post by PatJ » Wed Nov 17, 2021 8:21 pm

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.
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User avatar
PatJ
Lighting the Boiler
Lighting the Boiler
Posts: 37
Joined: Mon Mar 05, 2012 5:23 pm
Boat Name: To be determined
Location: Central USA
Contact:

Re: Green Twin Complete

Post by PatJ » Wed Nov 17, 2021 8:23 pm

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.
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User avatar
PatJ
Lighting the Boiler
Lighting the Boiler
Posts: 37
Joined: Mon Mar 05, 2012 5:23 pm
Boat Name: To be determined
Location: Central USA
Contact:

Re: Green Twin Complete

Post by PatJ » Wed Dec 08, 2021 9:37 am

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
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