Disclosure: First off, these are not my models, but that of the "Old Navy" Steve Lund and Bill Hathaway.
I had the pleasure of meeting them in 2007 at the Monitor Center at the Mariners' Museum in Virginia, U.S.A. At that time I was involved in Civil War reenacting (role as a U.S. navy officer) and we were all participating at a special event. The "Old Navy" guys brought a trailer loaded with 1/35 scale R/C ironclad models.
I am putting together this information in case others are interested in building a Civil War ironclad, and need more information. I thought I had more still photos of the models but these are all I found. The video shows many of the models.
[Sure, the U.S was not the first country to have an ironclad but did have the first battle between the in March 1862. Between the north and the south about 66 ironclads were completed during these four years. Some quite simple and others quite out of the norm. If you want to build a U.S. ironclad check them out - the variety is amazing.]
The first photo is the full scale replica (hollow) of the U.S.S. Monitor located behind the museum.
The second photo is that of Steve (right) and Bill (left), middle person is unknown. They are standing in front of an accurate reproduction of the Monitor at 1/35 scale. It an R/C - powered model.
The remaining photos are close-ups of the Monitor model.
So here is my video link: https://www.youtube.com/watch?v=GMnEmFW0XPk The video is a bit old but I think you get the idea.
Steve and Bill made an excellent book, 'Modeling the Ironclads" which is available at: https://thenrgstore.org/products/modeling-the-ironclads . However you can preview it or print this out yourself you can download it at: https://walternelson.com/ironclads.pdf
ps. I was going to build a 1/35 scale Monitor but got side tracked while searching for a way to make thick, black smoke which I could not find and this project eventually gave way to building other models.