describe the petropavlovsk-class battleship
An upper belt of armor was necessary and the weight required was gained by shortening the waterline armor belt, which left the ships' ends protected only by the sloping armor deck. Other changes included the replacement of the barbettes with turrets of the same type as used in the battleship and the substitution of QF guns for the original guns. This last change saved enough weight to permit four more six-inch guns to be added
Petropavlovsk-class battleship
The design was intended to have a maximum speed of 17 knots using forced draft, but model testing of the hull showed that it could only reach . Rather than delay construction by redesigning the hull, the navy accepted the slower speed. Development of the quick-firing (QF) gun meant that an upper belt of armor was necessary and the weight required was gained by shortening the waterline armor belt, which left the ships' ends protected only by the sloping armor deck. Other changes included the replacement of the barbettes with turrets of the same type as used in the battleship and the substitution of QF guns for the original guns. This last change saved enough weight to permit four more six-inch guns to be added.
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Petropavlovsk-class battleship [SEP] Background and description
Tsar Alexander III's ambitious building programme of 1882 called for construction of 16 battleships in 20 years for the Baltic Fleet. By 1890 the program was behind schedule and the director of the Naval Ministry, Vice Admiral , proposed that six first-class and four second-class battleships be built together with some armored coast-defense ships to make up the numbers required. The "Petropavlovsk"-class ships were designed as first-class battleships to meet his requirement for a heavily armored ship that displaced and had a speed of , a maximum draught of and a range of with good seakeeping qualities. The design began as an enlarged and improved version of the battleship , but with her main armament of four guns mounted in lighter barbettes rather than the heavy gun turrets of the older ship.