The Pacific War Online Encyclopedia
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|2610 tons standard displacement
|376'6" by 40'10" by 14'2"
114.45m by 12.45m by 4.32m
2x4, 2x2 40mm Bofors AA guns
11 20mm Oerlikon AA guns
2x5 21" torpedo tubes
6 depth charge throwers
2 depth charge tracks (56 depth charges)
||2-shaft G.E.C. geared
4 Babcock & Wilcox boilers
|504 tons fuel oil|
|3300 nautical miles (5300 km) at 20 knots|
||SC air search radar
SG surface search radar
|| Some units were completed
with QC sonar due to a
shortage of QGA.
1945: One bank of torpedo tubes
replaced with 1x4 40mm guns and the 20mm outfit increased
to 10x2 20mm
The Allen M. Sumners, completed in 1943-45, were an attempt to improve on the firepower of the Fletchers. They were a disappointment to the U.S. Navy, which expected more from the new design. Few of the ships actually achieved the design speed of 36.5 knots, with some units unable to do better than 33.6 knots in trials. The bridge and living quarters were quite cramped to make room for fire control directors and electronic equipment. The twin mounts had a longer firing cycle and trained significantly more slowly than the single mounts of the Fletcher. However, the focused firepower proved beneficial in combat. These ships also had twin rudders (significantly improving maneuverability) and radar accommodations prefiguring the C.I.C. concept. Their greatest deficiency was the great weight of the forward mounts, which tended to drive their bows into the water and introduced stress points in the hulls. However, they proved durable in combat with the kamikazes.
The notion of twin gun mounts for destroyers had
tested in the Porter and Somers
classes, but these had no antiaircraft
capability, and a suitable twin dual-purpose mount could not be
developed in time for the Fletchers.
Such mounts were later produced for large warships, and by 1943
production was sufficient to permit their use in destroyers. A
for a six-gun destroyer was completed in 1942 in anticipation of
availability of the mounts.
A peculiarity of the Allen
M. Sumner design was that the after 5"/38
twin gun mount was capable of firing dead ahead, over the masts
recommended that a dozen of these destroyers should be completed
as offensive mine layers
by replacing the torpedoes, two
depth charge throwers, and three of the 20mm guns with mine laying
for 120 mines.
These ships could carry 120 mines
and were thought fast
enough to sneak into enemy waters by
carry out their mission. They are listed separately as the Robert H. Smith class.
|arrived 1944-8||Sunk 1944-12-3 off Leyte
|completed 1944-10-12 (San Francisco)|
|completed 1944-10-25 (Seattle)|
|arrived 1944-11-10||Sunk by kamikazes
1945-4-12 off Okinawa
|completed 1944-11-24 (Seattle)|
|completed 1944-11-25 (San Pedro)|
|completed 1944-12-26 (Seattle)|
|completed 1944-12-27 (San Pedro)|
|completed 1945-1-27 (Seattle)|
|completed 1945-2-17 (San Pedro)|
||Sunk by kamikazes 1945-5-28 off Okinawa|
|completed 1945-3-3 (Seattle)|
|completed 1945-3-8 (San Francisco)|
(2010; accessed 2013-2-9)
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