USS Monitor "Monadnock" Trunk Steam Engine Animation.avi

This animation demonstrates the internal parts of John Ericsson's monitor "Monadnock" steam engine. This engine is similar to the first U.S. Navy ironclad "The Monitor" steam engine, also build by John Ericsson.
The terminology for the engine type is probably a half-beam, twin-piston trunk steam engine. Also has been described as a double end-to-end-cylinder trunk engine, with two single-trunk pistons.

Geometry was taken from an old engraving, which is shown at the end of the video. Bore of the original engine was 40 inches, and stroke was 22 inches. Trunk diameter is 13 inches.

The engine was drawn in CAD, which took about 6 hours, and 6 another hours to adjust the geometry to get an exact 22 inch stroke.
The CAD drawing was then copied 16 times, and the rotating parts moved 22.5 degrees for each drawing.
JPG's were then plotted for each of the 16 drawings, and the JPG's converted to GIF's using PaintShopPro.

The GIF's were combined into animation using PolyView (free software), and then CamStudio (free software) was used to capture the screen and create an AVI video file.

Preliminary CAD drawings of this engine can be viewed here:
https://sites.google.com/site/jorgensensteamsite2/ironclad-monadnock-steam-en...

Initial construction photos of this engine can be viewed here:
https://sites.google.com/site/jorgensensteamsite2/ironclad-monadanock-steam-e...

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CLASSIC STEAM ENGINE ENGINEERING FORUM
at this link:
http://www.classicsteamengineering.com/index.php

Category:

Science & Technology

Tags:

• USS
• Monitor
• ironclad
• steam
• engine
• john
• ericsson
• model
• animation
• trunk
• half-beam
• Battle
• of
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• Merrimack
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• CSEE
• CLASSIC
• STEAM
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[steamnut2008]

Normally, the cylinders would be separated, and a standard crankshaft installed between them, but John Ericsson used this unusual combination of two single-trunk cylinders because the space available at the rear of the ironclad "Monitor" was very limited, and this was a very compact design that would fit into the hull. It produced a large amount of horsepower in a small packaged unit.

[WWII4444]

the way it works seems rather ungainly at first glance.

[keyboardjeff]

Very nice.

[Buemmo]

samll and effective! What else can you wish for?

[Robkat3751]

very strange way to get the rotational to the shaft.