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March 2012
Stability requirements
for yacht racing
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Guidance on stability requirements for yacht racing and manufacturing is drawn from a number of sources, with
various different measures used to judge compliance. This can be rather confusing, so a summary page (Stability tab above)
explains some compliance options for yacht racing.
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Jan 2012
Revalidation underway
Measurement guide revised
System updated
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Revalidation forms are being sent out now. There are some changes - the details are on the measurements page.
Certificates for the new season will be issued from the end of February.
The measurement guide has been revised - and there is a new upwind-headsail measurement.
A set of keel drawings, split into planforms and sections, will give a better idea of surface area and volume distribution.
Keel construction materials are listed, and lifting/swing keels and associated hull ballast can be identified.
The system software has been amended in line with the above changes as well as the feedback from 2011.
Final testing will take place over the next few weeks.
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October 2011
Rating review
VPRS summaries
1 + 2 page
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With the 2011 racing season coming to a close, there is plenty of opportunity to gather feedback and to decide on improvements
to feed into the VPP models for 2012. In addition, there will be some minor changes to the measurements
and a set of keel diagrams will improve differentiation between keel types.
In response to widening interest and some direct requests, a couple of short system summaries are now available - links above.
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May 2011
Poole Yacht Club
2nd weighing session
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A second weighing session took place on Friday 13 May at Poole Yacht Club, again in good weather. An easy half day with only
5 boats to weigh, but well worthwhile, with one recording a gain of 586 kg and another of 14%.
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April 2011
Poole Yacht Club
weighing session
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A weighing session was conducted on Friday 15 April at Poole Yacht Club - in almost perfect conditions. Most of the boats were very well
prepared and there were plenty of people freely giving their time to help out. As a result the day was a great success - and with 18 boats
weighed - the cost was very reasonable.
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March 2011
PYRA recruitment
party at Parkstone
RMYC Class 2
racing with VPRS
VPRS upgrade complete
Ratings now available
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PYRA recruitment is underway - if you signed up at the party held at Parkstone Yacht Club then please remember to return your application
form well before the first race. The VPRS joining fee has been waived for PYRA members in 2011; full membership includes entry
into the system as well as the rating certificate.
The Class 2 boats at the Royal Motor Yacht Club (at Sandbanks, near Poole Harbour entrance) will now use VPRS to score their racing -
which takes place on Thursday evenings.
VPRS has been revised and tested - and the system parameters have been frozen for the new season. Most of the changes relate to sail design,
construction and reefing, but moveable ballast is also now accounted for.
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February 2011
Poole Class 1A
to use VPRS
Website upgraded
Parkstone Cruisers AGM
Class 1 adopts VPRS
Class 3 to decide
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Poole Class 1A - which races on Tuesday evenings and at the weekend - has decided to use VPRS to score their series. A
weighing session, for which a lot of interest has been expressed, is being organised for mid April. This will provide a great opportunity
to take a number of additional measurements - and ensure that we have a fair set of ratings early in the season.
The website is now ready for the 2011 racing season. The measurement guide is more detailed and there are some additional accompanying diagrams.
For new rating applications, PDF and Excel forms are available for download.
A presentation explaining the design and use of the system was given to the Parkstone Cruiser Class at their AGM on 9 February. This was
followed by a lively discussion, after which Class 1 voted convincingly to adopt VPRS. As expected, the situation was less clear for classes
2 and 3 which decided to stay with PHHS. However, the debate continued after the meeting and there is now a possibility that class 3 will
also adopt.
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January 2011
VPRS upgrade started
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VPRS is being upgraded to recognise the advantages of 'deck sweeper' head - sails and laminated sail construction. The way in which weights are
captured will be rationalised - and moveable ballast will be accounted for. Finally, the system will be extensively re-tested, with an
emphasis on identifying sensitivities to small errors in the measurement data. Enhancements planned for later in the year will see the
prototype VB/Excel platform replaced by something more
powerful and maintainable - and there will be some functional additions to the web interface.
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December 2010
Poole Class 1A
presentation
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A presentation was given to Class 1A members at Poole Yacht club to explain the design of VPRS - and the benefits of using it when compared with the other local systems.
An interesting discussion followed during which many useful points were raised; some of these will be addressed in the system upgrade this winter.
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November 2010
PYRA adopts VPRS
across all classes
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Finally, after a year of evaluation, and a lively debate at the AGM, PYRA voted to adopt VPRS across all classes - replacing both IRC and PHHS.
This had the immediate beneficial effect of simplifying the class structure, with the promise of much more competitive racing in 2011. As a consequence
of this decision, there has been greater interest from the individual clubs in Poole harbour.
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September 2010
Weymouth yacht clubs
express interest
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There has been some interest and favourable exchange with the clubs in Weymouth, although we have yet to
show the system in any detail.
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April 2010
VPRS prototype
goes on trial
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Having evolved from a personal research project that started more than 3 years ago, into a sophisticated VPP-based yacht
rating system, VPRS was finally ready - after months of work over the cold winter months, for the 2010 trial.
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October 2009
Presentation to
PYRA Committee
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In response to concerns about PHHS, Ruth Kelly gave a presentation to the PYRA Committee on rating and handicap systems and
introduced the prototype VPRS system as one of the possible alternatives. The committee decided to sponsor further development
of the system and to run a trial during the 2010 season.
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