A journal following the history, design, construction and operation of Bernard Kempinski's O Scale model railroad depicting the U. S. Military Railroad (USMRR) Aquia-Falmouth line in 1863, and other model railroad projects.
©Bernard Kempinski All text and images, except as noted, on this blog are copyrighted by the author and may not be used without permission.
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October 15, 2021

Alexandria Slave Jail Model

Earlier this year Alexandria's new Freedom House Museum hired me to build a model of the slave jail that was located at the corner on Duke and Payne Street. This slave jail, also called a slave pen, was used by various slave dealers for about 25 years. When the Union Army occupied Alexandria, they took over the facility forever ending its use as a slave pen. In a touch of bittersweet irony, they used it as a jail for some Confederate prisoners, as well as misbehaving Union soldiers.  For a full history of the facility,  please see this link.

A period photo after the Union made extensive
changes to the building

This was a challenging model to build both for technical and emotional reasons. 

The Union Army made many changes to the building during the time of the civil war. They also took several pictures of the buildings. The museum wanted the model to depict the time when it was used as a slave dealer. But we had almost no photos from that era. Luckily we did have an extensive archeological study of the building done by Benjamin Skolnik, of the Office of Historic Alexandria. We also had the results of an historical architectural history study by Susan Pommerer of the Smith Group. They did an extensive review of many existing records. They also did a detailed measurement of the existing structure. Included in the study was a laser scan of the building, but that did not provide much direct useful information to me as the model builder. More valuable were the isometric and elevation views that Susan provided to me.

Even with those excellent resources, there were many details that we were not sure about, particularly in the backyard. We hope this model is an accurate representation of the building as it stood just before the Union Army ended slave dealing in Alexandria for good.

The model will be on display in the museum later this year.







9 comments:

  1. Nice work Bernie. I was curious if the brick walls were constructed of embossed plastic sheet, or another material?

    Jeff

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  2. the brick walls are laser engraved MDF and plywood.

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    Replies
    1. Interesting. I guess this method allows for any bond pattern you want, in addition to accurate brick sizes.

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    2. Yes, to a limit. In smaller scales the engraved grout line becomes disproportionately large due to the minimum laser spot size, which is about 0.006 inches.

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    3. Yes, to a limit. In smaller scales the engraved grout line becomes disproportionately large due to the minimum laser spot size, which is about 0.006 inches.

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    4. Interesting, I guess the laser is similar to a traditional saw kerf with a table or skill saw. I have no experience with any 3d/or digital fabrication. As an architect I have always just draw buildings in autocad, and now revit. Looking to switch over to the Apple world soon, as I am not a big fan of autodesk

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  3. How do you handle the corners? Miter joints? And the interlocking of the brick pattern?

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    Replies
    1. I laser cut the walls, then mitered the joint on a disc sander with a miter table.

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  4. A wonderful model of a terrible place. Nice work as always.

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