GEARING CLASS DESTROYER

The '''Gearing'' class' of destroyers originated near the end of World War II when the United States Navy required more range (fuel) and anti-aircraft capabilities from its ''Allen M. Sumner'' class destroyers. It managed that by adding 14 ft (4 m) to the length in the midsection.
The first of these modified ''Sumner''-class destroyers was ''Gearing'' (DD-710).

Contents

FRAM I upgrade

FRAM II upgrade

Chao Yang class

Specifications as built

External links

FRAM I upgrade

In the late 1950s many of these ''Gearing'' class destroyers underwent extensive modernization overhauls, known as FRAM I, which was designed to shift them from more of an AA platform to an ASW platform.
The FRAM MK I program was designed primarily for the Gearing class destroyer. This upgrade includes rebuilding the ship's superstructure, engines, electronic systems, radar, sonar, and weapons. The aft twin 5" guns was removed. upgraded systems include SQS-23 sonar, SPS-10 surface search radar, 2 x triple Mk 32 torpedo launchers, 8-cel ASROC box launcher, and QH-50C DASH ASW drone helicopter, with its own landing pad and hanger. [1]
The QH-50C DASH was an unmanned anti-submarine helicopter, controlled remotely from the ship. The drone could carry 2 x MK.44 homing ASW torpedoes. During this era the ASROC system had effective range of only 5 miles, but the DASH drone allowed the ship to deploy ASW attack to sonar contacts as far as 22 miles away. [2]
An upgraded version of DASH, QH-50D, remained in use by the US Army until May, 2006. [3]

FRAM II upgrade

The FRAM MK II program was designed primarily for the Sumners class destroyer, but were used to upgrade the Gearing class as well. This upgrade program includes life-extension refurbishment, new radar system, Mk. 32 torpedo, DASH ASW drone, and most importantly, a new variable depth sonar (VDS).

Chao Yang class

After the Gearing class ships were retired from USN service, many were sold abroad, including over a dozen to the ROCN (Republic of China Navy) in Taiwan. The ROCN upgraded these ships under the Wu Chin I, II, and III programs and commissioned them as the Chao Yang class. The last batch of 7 Chao Yang Class destroyers were retired in early 2000s. [4]
Under the Wu Chin upgrade program, the old twin 5" mounts were removed and replaced with 4 x Hsiung Feng II SSM, 10 x SM-1 (box launchers), 1 x 8-cel ASROC, 1 x 76mm gun, 2 x 40mm/70 AA, 1 x 20mm Phalanx CIWS, and 2 x triple 12.75" torpedo tubes. The DASH ASW drone were retained on some ships.
After the Chao Yang destroyers were decommissioned, the SM-1 launch boxes were moved to other ROCN ships, to improve their anti-air capability.

Specifications as built

Displacement: 2,616 tons standard; 3,460 tons full load
Length: 390.5 ft(119 m)
Beam: 40.9 ft(12.5 m)
Draught: 14.3 ft(4.4 m)
Propulsion: 2 shaft; General Electric steam turbines; 4 boilers; 60,000 shp
Main Battery: Six 5"/38 cal. dual purpose guns in three twin mounts
Speed: 36.8 knots
Range: 4,500 nm at 20 knots

External links

★ ''Gearing''-class destroyers at Destroyer History Foundation

★ http://www.gyrodynehelicopters.com/gearing_class.htm