Republic Monotors

If you want I can send the drawing via an E-Mail if you PM the address you want it sent.

I would be glad. Dilandualb@yandex.ru

Those members on the gun frame are equivalent to 4" or 100 mm H beams that cast frame is directly over a 4" by 5.5" (100 mm x 137.5 mm) I beam with half inch steel plate between. It should easily take the recoil. The trunion is 8" 200mm in diameter.

Oh! I found the good schemes for the 1870s monitor:

https://upload.wikimedia.org/wikipedia/commons/9/90/Danish_Ironclad_Gorm_%281870%29_Turret.jpg

https://upload.wikimedia.org/wikipedia/commons/7/7e/Danish_Ironclad_Gorm_%281870%29_Plan.jpg

This is the blueprints for the danish "Gorm", comissioned in 1871. She was armed with two 10-inch RML guns.

Very interesting muzzle loaders with angled return, very extreme from some I've seen.  I just start designing I've always felt compressed air was better than live steam and electricity for ships as it will power common "steam engines" for winches etc. without the danger of electricity and water, or live steam at very high pressures/temperatures and very scalding in the event of a rupture or battle damage.  Putting the bunkers on either side of the boiler room adds protection as the top four feet of the boiler room is above the water line.  Using the two crank arrangement shown more of the weight of the engine could be moved forward and the side passages surrounding the Magazine give access to each side so the engine could be moved back five feet more.  

Taylor said Maxim's but the Germans abandoned the Maxim in 1908 in favor of the MG 08 https://en.wikipedia.org/wiki/MG_08 a derivative of the Maxim. Of course Amerika came from an alternate history and the standard Maxim may have lasted longer in their world

Sent Turret and ship plan via E-Mail.

Well, it's the typical design for XIX-century Coles turret. As you could see - the whole desing is as low as it possible. This systems are pretty heavy!