On-site Propeller Cropping in Ghent

press release
Wednesday, May 02, 2012

When all four propeller blades of a 100-meter general cargo vessel were severely bent, a repair was required by the classification society. Hydrex therefore performed a detailed video inspection, followed by a repair while the vessel was berthed in Ghent, Belgium.

 

To make a full assessment of the damage, the diver/technician team first performed a detailed underwater inspection of the blades. This revealed that one blade was bent over an angle of 15° while the other three were bent over an angle of 90°. Because the damage was too extensive, straightening these last three blades was not an option. To keep the balance of the propeller, it was decided to crop all four blades at the exact same position.

 

The information acquired during the inspection was then used to determine the correct measurements needed for the cropping.  The area to be cropped was marked out on the four blades and verified. The team then cropped the blades one by one and ground their edges to give them the correct radius. When the cropping was complete, the Hydrex technicians polished the blades to make sure that any remaining loss of efficiency would be minimal.

 

This restored the propeller’s balance and brought its performance as close to its optimum performance as could be achieved. The job was completed on-site, saving the time, expense and extra work of drydocking the vessel.

Maritime Reporter September 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

ABB's 25th Year in Dubai

ABB Turbocharging is celebrating its 25th anniversary in UAE. Established in 1989 in Dubai, ABB has grown to become a fully-fledged service station capable

Moore Stephens Expects Vessel Operating Cost to Rise

Vessel operating costs are expected to rise by almost three per cent in both 2014 and 2015, according to a new survey by international accountant and shipping consultant Moore Stephens.

Wärtsilä Steerable Thruster Gets Class Approval

DNV-GL approved the design of the Wärtsilä WST-14 thruster, significant as approval was granted based on a thruster design that has yet to be introduced into full series production.

Ship Repair & Conversion

Moore Stephens Expects Vessel Operating Cost to Rise

Vessel operating costs are expected to rise by almost three per cent in both 2014 and 2015, according to a new survey by international accountant and shipping consultant Moore Stephens.

Maritime Reporter @ 75: The Daily Cartoon

Maritime Reporter & Engineering News was founded by John J. O'Malley (1905-1980) in 1939, and today ranks as the world's largest audited trade publication in the world serving the maritime industry,

Mitsubishi Super Skiving System

Mitsubishi Heavy Industries, Ltd. (MHI) has completed development of the "Mitsubishi Super Skiving System" for machining internal gears with high speed and outstanding precision.

 
 
Maritime Contracts Maritime Security Maritime Standards Naval Architecture Navigation Pipelines Pod Propulsion Port Authority Ship Repair Shipbuilding / Vessel Construction
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2415 sec (4 req/sec)