On 431mm guns for Ruggiero di Lauria class ironclad battleships

[GianmarcoBianchi]

Benedetto Brin liked big cannons for his giant ironclads. For the 3rd series of Brin design philosophy, Ruggiero di Lauria, Francesco Morosini, and Andrea Doria, they use the same caliber 431mm to the former class Italia.
As for this gun, were those the same to Italia and Lepanto's?
Laurias' guns were covered with egg-liked shield. Any photo show its clear and exact shape?

 

[Pirate Pete]

Screen grabs from page 342 of Conway’s 1860-1905, apologies for poor quality..

 

[Phoenix_jz]

Benedetto Brin liked big cannons for his giant ironclads. For the 3rd series of Brin design philosophy, Ruggiero di Lauria, Francesco Morosini, and Andrea Doria, they use the same caliber 431mm to the former class Italia.
As for this gun, were those the same to Italia and Lepanto's?

The Ruggiero di Lauria-class all used a gun initially known as the 431 A (Armstrong) in the Regia Marina, and later re-designated 431/27 A1882. They retained the same bore length as Lepanto's earlier 431 B (431/27 A1881) of 11,658.6mm (27 caliber lengths exactly, as the 431mm was a 431.8mm bore), though it was slightly longer overall (12.433m vs 12.370m). There were minute differences in construction but it all balanced out such that the gun systems weighed exactly the same - 105.0 tonnes.

The gun mounts themselves were very similar overall, in fact of identical mass and dimensions and with the same range of motion - but in the Ruggiero di Lauria-class they seemed to have been mounted one degree inclined, which allowed for greater maximum elevation without actually increasing the elevation limits of the guns (+13°/-5°) versus the Italia-class (+12°/-6°). They were also placed lower in the ship.

Laurias' guns were covered with egg-liked shield. Any photo show its clear and exact shape?

I don't have too many good images of this, unfortunately, but these are the best I have (scans from Le Navi di Linea Italiane):

 

[GianmarcoBianchi]

The Ruggiero di Lauria-class all used a gun initially known as the 431 A (Armstrong) in the Regia Marina, and later re-designated 431/27 A1882. They retained the same bore length as Lepanto's earlier 431 B (431/27 A1881) of 11,658.6mm (27 caliber lengths exactly, as the 431mm was a 431.8mm bore), though it was slightly longer overall (12.433m vs 12.370m). There were minute differences in construction but it all balanced out such that the gun systems weighed exactly the same - 105.0 tonnes.

The gun mounts themselves were very similar overall, in fact of identical mass and dimensions and with the same range of motion - but in the Ruggiero di Lauria-class they seemed to have been mounted one degree inclined, which allowed for greater maximum elevation without actually increasing the elevation limits of the guns (+13°/-5°) versus the Italia-class (+12°/-6°). They were also placed lower in the ship.



I don't have too many good images of this, unfortunately, but these are the best I have (scans from Le Navi di Linea Italiane):

View attachment 812663

View attachment 812664

View attachment 812665

it seems like that, Doria has the egg-shaped shield. And Lauria's/ Morosini's have more edged shapes.