Baynunah Class Corvette

By Keith Henderson at March 08, 2012 03:43
Filed Under: Navy News

Abu Dhabi Ship Building (ADSB), UAE, recently launched their third Baynunah Class corvette, hull number four of a fleet of six. The Baynunah program is due for completion for the UAE Navy by 2014.

Caption: First of Class UAE Navy corvette Baynunah (P171)
Image credit: Abu Dhabi Ship Building

Considered to be one of the largest Middle East warship construction programs, the corvettes will undertake a wide range of duties and their design, a derivative of CMN's BR70 230 ft (70 m) corvette class, uses a deep-V hard-chine hull combining good sea keeping characteristics with manoeuverability. It has a relatively shallow draft for operation close inshore a features a stealth superstructure and a helicopter landing deck with hangar.

First of class was built at CMN, Cherbourg, France, and launched in 2009 with subsequent hull construction being carried out by ADSB. Vessels two and three have already been built and were commissioned in 2011. The hull of LOA 234 ft (71.3 m), beam 37 ft (11.3 m) and draft of 9.5 ft (2.9 m) displaces 915 t and is constructed of steel with an aluminum superstructure.

There is an unusual CODAD propulsion system comprising four diesel engines driving three waterjets with selectable operation, offering lower weight and better performance compared to conventional configurations. The four engines are MTU 16V595 TE90 rated at 4.2 MW at 1800 rpm. Two lateral engines each power a Kamewa 112S11 waterjet through a Renk AUSL gearbox. For greater operational flexibility, the center twin input, single output (TISO) Renk ASL 2 x 115 gear unit can be driven at continuous maximum power by two engines or at partial load with only one diesel engine outputting to a single, larger, center mounted Kamewa 125B11 waterjet. Control of the center gear unit with one or two diesel engine operation is fully automatic.

Maximum speed with all four engines running is 32+ kn: at the cruising speed of 15 kn the range is 2,400 nm. The Baynunah class corvettes have a design endurance of 14 days.


Caption: The Renk transmissions used on board the Baynunah Class corvettes.
Left a twin input, single output (TISO) Renk ASL 2 x 115 gear unit can be driven
at continuous maximum power by two engines or at partial load with only one
diesel engine. Right One of two Renk AUSL single input, single output gearboxes
powering the outer water jets.
Image credit: Renk AG

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