Was it really 'insufficient' though? The USS South Dakota got hit pretty hard during the Second Naval Battle of Guadacanal and though she suffered some damage none of it was critical, to include "the only time in US Naval History that a US battleship was struck by a foreign battleship's main-caliber AP projectile" that struck the ship near the aft main turret.
Was it really worth it though? I read critical comments on the Iowa-class that in an article about US fast battleships some time ago and could agree with some of the reasoning, that the tousands of tons of extra steel to make them go a few knots faster compared to the South Dakota and North Carolina classes wasn't really worth it given that they were mainly utilized as AAA escorts for carriers and flagships, both of which could have easily been done by other ships.
Some info from www.navsource.org
Plate No. I showing gunfire damage report inflicted on the South Dakota (BB-57) during the battle at Guadalcanal, 14 - 15 November, 1942. Published 1 June 1947.
17+ inches of steel armor is nice to have.... Couple of things to add: the Kirishima had an older armor layout with the armor being distributed over more of the ship. The South Dakota had the newer all or nothing design with armor concentrated over the most vital areas. Also, Japanese shells had a longer fuze setting as it allowed better ability underwater (falling short) but resulted in sometimes going through unarmored parts and exploding too late.
"The barbette hit on the South Dakota by the 14" shell from Kirishima was almost at right angles and with a small downward angle. The shell tore a rather large hole in the 1.5"-thick STS (armor-grade steel) weather deck and DENTED the 17.3" Thick-Chill (55% (circa 9") hard face thickness!!) curved Class "A" barbette side plate"
Also found on Navy General Board the article on the Iowa as well as another article on the Alaska class large cruisers. It is a really good historical website.
Iowa Class Battleships - A Departure from Traditional Design - Navy General Board
The Iowa class battleships were the most powerful dreadnoughts launched by the USA. However, these powerful ships were a departure from traditional design.
www.navygeneralboard.com
Alaska Class : America's (Not Quite) Battlecruisers - Navy General Board
Shares Facebook Twitter reddit Like 1 The warships of the Alaska class are perhaps one of the more confusing ships ever put to sea by the United States. Designed to prowl the oceans and hunt down enemy commerce raiders, they possessed high speed and considerable firepower. Vastly more powerfully...
www.navygeneralboard.com
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