MAD-4A wrote:WLBjork wrote:...but a pre-dreadnought would get battered by a WW2 era CA (if not CL).
no - Russian PDs fought German DREASNOUGHTS at Moon sound. While TTs may be a problem (most were designed before TT protection) but they still fought well. The German PDs even fought the Grand fleet at Jutland (only 1 was lost {to a TT}) a CA (TTs not withstanding) would be in trouble from those 12" guns.
I did specify
WW2 ships.
Let's take the Des Moines class. Generally has 6-8" of armour*, which is penetrated at a range of 6,000-8,000 yards by the Russian 1895 12"/40 that would have been on those ships. At that range, and with the original fire control systems, there is less than a 40% chance of a hit from a full broadside of the 4 12" guns.
Firing the 8" guns back, the Des Moines can penetrate the maximum 10" of armour* at a range of 10,000 yards, with a significantly higher rate of fire and greater accuracy. Further, those 8" guns are capable of higher elevation, allowing plunging fire beyond this range (in no small part due to the advent of radar), allowing effective engagement at ~28,000 yards.
Furthermore, Des Moines has a significant speed advantage, allowing her to control the action.
*Armour thickness taken from Wikipedia. Naval gun performance taken from NavWeaps and as such I'm not certain which armour type this data refers to, and it is therefore possible that the engagement will move in favour of the Des Moines.