Cruisers were getting bigger and the 6" secondary armament of the Ross class battleships was felt to not be strong enough for the job any more. The Antarctican Admiralty had liked the twin 9.5" on the Byrd class and felt that an upgraded Ross class with six twin 9.5" turrets would be a ship to be reckoned with. The size of the ships grew a little bit more. The first steel battleships had been just under 400 feet now they were nearly 500 feet and twice the tonnage. Most of all these were to be the first turbine engined battleships built for Antarctica. The turbine machinery required a third funnel,



The Peary class also introduce the tripod mast to Antarctican battleships. Gunnery directors made there first appearance in this class. One of the pitfalls with the class was that there were now eight quite large holes in the armoured deck where the barbettes went through. For almost a year these ships were the most powerful in the world. Then they became obsolete. It was that quick. The speed of the building of the Dreadnought surprised the world. At age 20 the two remaining ships of the class were converted first to training ships, then one as a trials, and area defence vessel, while the other was stripped and converted to an aircraft carrier.

It does help if I remember to add the drawings before I post to the internet, duh.


While as the trials ship, the Commodore Peary had the forward two, broadside, 9.5" turrets removed and replaced with the new dual purpose 5" twin turrets. These were left aboard when the ship was converted to an ADV. Two quad 2 pounder mountings were added and several 20mm fitted. Eventually some radar was added to the gunnery controllers and an air search radar to the top mast.

 
Displacement 16,800 tons standard, 19,750 tons full load
Length 495 ft
Breadth 82 ft
Draught 26 ft
Machinery 2 shaft, steam turbines, 30,000shp
Speed 22 knots
Range 7000 miles at 10 knots
Armour 11" side, 2" deck, 11"/7"/5" turrets
Armament As completed

4 x 14" (2x2)
12 x 9.5" (6x2)
2 x 3" AA (2x1) added 1916
4 x 2pd AA (4x1) added 1917
 
As ADV

2 x 14" (1x2)
2 x 9.5" (1x2)
4 x 5" DP (2x2)
8 x 2pd (2x4)
10 x 20mm (10x1)
Torpedoes 1 x 18" submerged in the bow (up to four reloads)
Complement 870-895 as Flagship
Notes Commodore Peary - converted to ADV 1927-29
Commodore Bellinghausen - mined 1916
Commodore Plaisted - mined 1916
Commodore Bancroft - converted to CV


Bow torpedo room of Peary class battleships. Note reloads.