New LST Class for ROK Navy
The South Korean Navy is augmenting their amphibious forces capability with the addition of four larger landing ships. This new class designated LST-2 has an LOA of 127 m and displacement of 4,500 t. The present largest LSTs are three Alligator Class LSTs with LOA of 370 ft (113 m).
Caption: ROK’s Biro Bong is one of three Alligator Class LSTs with LOA 370 ft (113 m) which will be
augmented with the addition of four LST-2s. An air cushion landing craft is in the foreground.
Image credit: U.S. Navy photo by Mass Communication Specialist Chief Ty Swartz
The first in class vessel is under construction at the Hanjin Heavy Industries shipyard and is due for delivery in 2013 with subsequent deliveries following to 2016.
Propulsion configuration details show an unusual CODAD (combined operation diesel and diesel) with a TISO (twin input, single output) gearbox arrangement whereby the power from two MAN 12V28/33D STC engines are merged by a gearbox with a single output shaft. There are two shafts propelling the ship with CP propellers. Each engine is rated at 5,460 kW at 1,000 rpm giving a total power of 21.8 MW. There is a 10 per cent overload on this rating for one hour in six hours. The engines will be installed in the ship with special elastic mountings to improve shock resistance and reduce noise and vibration .
The STC type suffix indicates sequential turbocharging providing higher torque over a wide rpm range. In addition, STC gives improved acceleration and lowers fuel consumption,
The engines are to be manufactured in Korea by MAN Diesel & Turbo licensee STX.
Caption: MAN Diesel & Turbo’s high speed diesel engine type MAN 12V28/33D
is rated at 5,460 kW at 1,000 rpm.
Image Credit: MAN Diesel & Turbo SE.
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