Sailors SocietyViganBühler GmbHGeneva DryPort of StocktonTBA Group
  • TBA Group
  • Port of Stockton
  • Telestack
  • Port of South Louisiana
  • Geneva Dry
  • Vigan

Hydrex propeller blade modifications

Hydrex propeller blade modifications

(Posted on 21/07/19)

Recently teams of Hydrex diver/technicians performed propeller blade modifications on several bulk carriers and tankers. In Singapore, Cẩm Phả and Amsterdam cropping was the only option for the damaged blades while in Rotterdam the bent areas on a bulk carrier’s propeller blades could be straightened.

The four blades of a 190-meter bulk carrier’s propeller were severely bent. An on-site solution was needed to restore the propeller’s balance and efficiency. A team was therefore mobilized to Cẩm Phả, Vietnam to bring the damaged blades back as close as possible to their original condition.

After the equipment arrived at the vessel’s location the team started the operation with a detailed survey of the affected propeller blades. The inspection revealed that the four blades were bent over angles of 90 to almost 180 degrees.

The team then used the information acquired during the inspection to calculate and determine the exact measurements needed to modify the trailing edges of the propeller blades.

Next the divers cropped the blades and ground their edges to give them the correct radius. When the cropping was complete, they polished the blades to make sure that any remaining loss of efficiency would be minimal.

In Singapore only two of the four blades of a 183-meter tanker needed to be cropped using this technique. The other two propeller blades had suffered small cracks and dents along their trailing edges. Because the damage to these blades was limited, cropping was not required. The divers grinded away the cracks and polished the edges of the blades to prevent further cracking.

A 220-meter tanker in Amsterdam had lost the tip of one of its propeller blades. The opposite blade had not been damaged, but it was also cropped to keep the propeller’s balance.

Four of the five blades of a 182-meter bulk carrier had small bent areas on the tip and trailing edge. These were straightened one by one during the ship’s stop in Rotterdam.

As the other vessels in this article, the bulk carrier could continue its schedule without going off-hire to drydock and with the performance of the propeller restored.

Latest News

New Nuclear for Maritime takes centrestage with record attendance

(Posted on 19/06/24)

Over 350 delegates registered for CORE POWER's landmark New Nuclear for Maritime Summit held in London... Read more


AI tools key to the 'urgent action' needed to meet IMO climate targets

(Posted on 19/06/24)

Yarden Gross, CEO and Co-founder of maritime technology start-up Orca AI, is championing the rapid,... Read more


Torbjørn Gjervik appointed Western Bulk CEO

(Posted on 19/06/24)

Western Bulk Chartering AS to has announced the appointment of Torbjørn Gjervik as Chief Executive... Read more


INTERCARGO condemns deadly attacks on bulk carriers

(Posted on 14/06/24)

Following news that a seafarer has died and another has been seriously injured in the latest Houthi... Read more


Ecomar delivered to AtoB@C Shipping

(Posted on 14/06/24)

ESL Shipping's subsidiary AtoB@C Shipping has on 13th June taken delivery of Ecomar, which is the third... Read more


GAC to acquire Quadrant Pacific’s ship agency business

(Posted on 14/06/24)

GAC Group, a leading provider of shipping, logistics and marine services in the Asia-Pacific market,... Read more


Onboard carbon capture relies on industry collaboration says DNV

(Posted on 07/06/24)

Onboard carbon capture (OCC) is attracting interest within the shipping industry, providing shipowners... Read more


Franman to promote Saudi’s IMI in Greece and Cyprus

(Posted on 07/06/24)

Athens-based Franman, a leading representative and supplier of premium equipment, parts, products and... Read more


Veson: Bulker newbuilding values at 15-year high

(Posted on 01/06/24)

Values for newbuild vessels of 180,000 DWT are up by c.5.45% from USD 66.09 mil to USD 69.63 mil according... Read more


NorthStandard annual review figures verify value of scale and reach

(Posted on 31/05/24)

Global marine insurer, NorthStandard, recorded increases in premium income, investment returns, and... Read more


TMS Awards 2023TelestackCimbriaVan AalstPort of South Louisiana
  • Bühler GmbH
  • Van Aalst
  • Sailors Society

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping