RINA Launches Sailing Rig Guidelines

RINA
Monday, October 08, 2012

International classification society RINA has developed guidelines for yacht sailing rig analysis, manufacturing and maintenance. The scheme includes full certification of the rig and a verifiable planned maintenance scheme.
Paolo Moretti, General Manager Marine, RINA Group, says, “This is a new approach to a challenging engineering problem. Until now, sailing yacht classification has focused on the hull and machinery. We think that this is illogical, as sailing yachts depend on their rig. So we are extending class service to cover the rig, from plan approval to in-service regular surveys exploiting the results of an innovative dynamic strength analysis. We see strong demand for this from the increasing number of large sailing yachts built for charter and commercial use, and from flag states that need our expertise to oversee the rig properly. But it is not just for commercial charter yachts, this is for any yacht and we know many private owners want to extend classification to cover this vital part of the yacht.”
The new guidelines for sailing rigs have been developed using a bottom–up philosophy, studying rig failures and researching relevant solutions to achieve cost-effective reliability improvement. A database of recorded dis-mastings has been examined using reliability engineering methods. Typical failure modes have been determined. High-risk priority items have been identified. Ad-hoc dynamic strength analyses have been calibrated and actions have been taken to achieve a significant reduction in rig failure rate.
Moretti says, “We class more yachts than anyone and we have long experience with yachts. We have learned, for example, that a high percentage of dis-mastings are associated with standing rigging failures. As with every complex system, failure rate of sailing rigs usually depends on time, varying over the life cycle, and insufficient knowledge about the rig response to the at-sea behaviour of units, sometimes coupled with lack of proper maintenance, is one of most common root causes of failures. In many cases, captains and crews are not aware of critical information relevant to their rigs and this often leads to wrong sail reduction manoeuvres that overstress the system. As far as the mast calculation is concerned, wave-induced inertial loads are sometimes of the same order of magnitude as aerodynamic loads and have to be taken into account during rig design. Our analysis criteria address those issues and we believe this is a unique service which will see a very high uptake.”
Under RINA requirements for sailing rigs, critical rig items will be surveyed and tested under surveyor attendance. A planned maintenance scheme will be required, and scheduled periodic surveys will be witnessed by class surveyors, supported by approved manufacturers as required. To support the crew and captain, RINA will approve a rig booklet giving guidance for rig maintenance and handling. A feasibility study for onboard accelerometers has been carried out to be used for crew guidance and data recording purposes.
One of the central aspects of RINA certification will be the use of a dedicated computational tool that has been developed to support rig structural design. This software, based on CFD and FEM analysis, is the most advanced in this field and also facilitates the calculation of inertial loads due to hull motion in severe weather conditions.
Owners and yards may opt for different levels of certification schemes. Rig plan approval is available as a stand-alone service. Rig type approval is available for CE yachts under 24 m. There is an additional class notation for yachts L>24 and a mandatory class notation for sailing charter yachts. These are backed by periodic class survey, outfitting testing and type approval certification, manufacturer-certified quality assurance, and manufacturer-certified planned maintenance schemes and certified compliance to statutory requirements.
RINA currently classes over 1,250 yachts and is supervising over 200 newbuilding yachts.

 

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

Technology

Gulf Island Fab Sign Bechtel Offshore Cooperation Agreement

Gulf Island Fabrication, Inc. says it has signed a cooperative agreement with Bechtel Oil, Gas, and Chemicals, Inc. to work together to pursue opportunities for offshore projects for the U.

UK Chancellor Mentions Hi-Tech Tax Breaks on Bibby Offshore Visit

Bibby Offshore, subsea services provider to the oil & gas industry, says it has hosted a visit by George Osborne, Chancellor of the Exchequer, to the Company’s workshop,

ABS, MPA to Collaborate on Maritime R&D

ABS and the Maritime and Port Authority of Singapore (MPA) signed a memorandum of understanding (MOU) today to promote maritime research and development (R&D) and innovation.

Shipbuilding

HydroComp to Hold Propeller 'Mini-Workshop'

A special version of HydroComp's intensive Propeller Workshops will be brought to Tampa before the start of IBEX 2014.   The Mini-Workshop is a special version

Danos Adds Environmental Services

Danos recently added an Environmental Services Division to the company’s collection of oilfield related services, which includes production workforce, construction,

Star Bulk Takes Delivery of First Capesize from JMU

Athens, Greece-headquartered Star Bulk Carriers says it has taken delivery of 'M/V Peloreus' a 182,000 dwt Capesize built by Japan Marine United (“JMU”) and the

Naval Architecture

HydroComp to Hold Propeller 'Mini-Workshop'

A special version of HydroComp's intensive Propeller Workshops will be brought to Tampa before the start of IBEX 2014.   The Mini-Workshop is a special version

New Crewboat Design for Offshore O&G Market

Upgraded crewboat design employs carbon-reinforced composite materials and is lighter, faster and more fuel-efficient than alternatives. Marine Oil Transportation

GE, LR Study Gas Turbines for Commercial Ships

GE Marine and Lloyd’s Register Sign Memorandum of Understanding to Collaborate on Applying Gas Turbines to Power Commercial Ships GE Marine and Lloyd’s Register

Yachts

Homecoming Scotland 2014 Fireball Championships

Lerwick Harbour is ready for an exciting week of sailing with the 2014 Fireball European Championships taking place at the port next week. As a warm-up to the main event,

DMC Builds the Smallest Ever Nozzle

Damen Marine Components (DMC), part of Damen Shipyards Group, announced it has smashed its propeller nozzle world record by 33 percent downwards. This downsizing

RCCNZ Praised for Missing Schooner Search Effort

The search for the missing schooner 'Nina' by the Rescue Coordination Centre New Zealand (RCCNZ) in June-July 2013 went beyond what many overseas authorities would have conducted,

 
 
Naval Architecture Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction Winch
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: 0.1858 sec (5 req/sec)