sail-world.com -- ORC announce Velocity Prediction Program improvements
ORC announce Velocity Prediction Program improvements
Wed, 7 Nov 2012
On the occasion of its 43rd Annual General Meeting, the Offshore Racing Congress (ORC) is happy to announce a major step forward in the accuracy of its Velocity Prediction Program (VPP) to be implemented for the 2013 sailing season. One of the principal aspects of this program, the Residuary Resistance (Rr) formulation, has been revised to now be more accurate for a broader range of yacht types that race within the ORC fleet database.
This new innovation is the result of an extensive multi-year study conducted by the International Technical Committee (ITC) in which historical data derived from tank test results has been combined with new research using Computational Fluid Dynamic (CFD) tools to create the new formulation.
'This is a huge step forward in solving a difficult problem which has faced VPP research for many years,' says Bruno Finzi, Chairman of ORC. 'The Congress applauds the ITC for the completion of this major project that will benefit all boats racing in the ORC fleets around the world.'
The new Rr formulation used in the new VPP is producing theoretical predictions which are much closer to the measured performance data taken from numerous boats in the ORC fleet.
'We looked at this carefully to help validate our results. The implied wind calculations are also much closer to that observed on the race course,' says Alessandro Nazareth, Chairman of ITC.
The Rr project's new formulation was the result of collating the relevant Delft Systematic data, analyzed by ITC member Kay Enno Brink and the CFD results coming from ITC's Philippe Pallu's work at CRAIN and the Fine-marine code work performed by new ITC member Jason Ker. Another ITC member working on this project was Andy Claughton of Southampton University.
'Validation of this new formulation has been very important to ensure that all elements of the fleet are treated fairly,' says Claughton. 'Our tests indicate that if any race from the past is rescored using the new rule the spread of corrected times for the first 10 or 15 boats is reduced, sometimes by 20-30%. This is fantastic progress.'
For more information on ORC's test fleet using the new 2013 VPP, visit the ORC website.
Burke Marine
Burke Marine, suppliers of international quality marine clothing and equipment, was founded by Martin Burke on the shores of Sydney Harbour in 1971. Visit our website for your nearest stockist. [More info]
http://www.burkemarine.com.au
Ensign Ship Brokers
Ensign Ship Brokers was established in 1980 and has spent the last 28 years expanding our marine knowledge and developing our reputation! We strive to provide the very best service! [More info]
http://www.ensignbrokers.com.au/
GME Standard Communications Pty Ltd
Leaders in communications and navigation. Their goal has always been to make products whose innovation, convenience and peace of mind can help improve the lives of their customers. [More info]
http://www.gme.net.au
Hamilton Island Luxury Accommodation
Full range of private apartments, villas and houses on Hamilton Island. 1, 2, 3, 4, and 6 bedroom options available. All include buggy and island airport or marina transfers. [More info]
http://www.whitsundayholidays.com.au
Multihull Solutions
Multihull Solutions is Australia and New Zealand’s premier offshore and cruising catamaran and trimaran specialist, offering sales and servicing of the world’s finest multihull brands.
[More info]
http://www.multihullsolutions.com.au
Navionics Australia
Navionics is proud of its superb cartographic database comprising more than 25,000 charts and port plans; the largest privately owned database of its kind, the only one using full seamless technology [More info]
http://www.navionics.com.au
OziOpti
OziOpti is all about 'getting kids in boats' and the Australian company supporting the introduction to of the world’s most popular junior sailing yacht, the 'International Optimist Dinghy' [More info]
http://www.oziopti.com.au
Performance Sailcraft Australia (Asia Pacific)
Laser builder Performance Sailcraft Australia has taken on the successful RS Sailboat range from Britain, and is now licensed to build and distribute all of the RS range in the Asia Pacific region. [More info]
http://www.lasersailing.com.au
Sanctuary Cove International Boat Show
2013 Sanctuary Cove International Boat Show is Australasia's most significant marine lifestyle event. We look forward to welcoming you to the 25th annual event. [More info]
http://www.sanctuarycoveboatshow.com.au/
Sealink Magnetic Island Race Week
Entries for the fourth annual Sealink Magnetic Island Race Week have opened! 4 days of racing, 5 days of fun – that is what you can look forward to from 3-7 September at Magnetic Island. [More info]
http://www.magneticislandraceweek.com.au
Ullman Sails
For over 45 years, Ullman Sails has been devoted to helping our customers reach their sailing goals. [More info]
http://www.ullmansails.com
VicSail Sydney
Vicsail Sydney Pty Ltd, launched into the Australian sailing fraternity in 1983 and has been sailing strong ever since. At Vicsail, “We Sail the Boats We Sell”. [More info]
http://www.vicsailsydney.com.au