Showing posts with label RYA. Show all posts
Showing posts with label RYA. Show all posts

Saturday, 4 September 2010

West Mersea Regatta & More Silverware

During the recent West Mersea Regatta I managed to crew on board the Golden Fleece.

First of all I hadn't been out on a yacht for about 15 years+ and my RYA Incompetent Crew skills were extra-ordinarily rusty; that said, it is easy to pick things up again.

The principal differences between yachting and dinghying is of course the increased size of everything. There are of course a few different levers and strings to pull but there doesn't appear to be the concentration and focus on sail shape that I spend my time on in the Xenon. For example the Golden Fleece is a classic and the design means the primary sail is the genoa not the main sail. As a result much of the attention goes on making sure tacks/gybes go smoothly and the genoa is full. I don't think we talked about adjusting the luff in the main at all. Whether we were heeling over or not did not make much of a difference either whereas the secret of sailing the Xenon is keeping it flat - by the way forget that if I race against you.


Pic - The Golden Fleece of West Mersea

What I found quite interesting was that we had on board a chap whose sole job was to navigate us round the course. It makes absolute sense given the increased scale of everything we were attempting to do and it adds another dimension to racing. This means that when dinghy racing you are strongly advised to learn as much about your course as possible before you start; there is no cosy seat to excuse yourself to while you figure out where you are and which direction to point.

I must thank the Captain of the Golden Fleece for having me on board, it was a great experience. The boat has an interesting history, originally from South Africa and occasionally wrecked ..... more information here.

Finally, the silverware we won was for the most Elegant Classic Yacht (...and crew of course).

Saturday, 1 May 2010

Definitions of RYA Portsmouth Yardstick Numbers

When looking up your Portsmouth Yardstick Handicap number on the RYA website, you'll find the letters PN, PY, SY, RN & TN next to them.

For example the Topaz Xenon is 1070 RN.

Basically this means that all us Topaz Xenon sailors are sailing on an estimated handicap. Encourage your club to submit returns to the RYA and we should see something more accurate appearing. I suspect though it is probably near enough accurate as I am starting to beat the Laser sailors in the club.

See.....RYA Definitions

Portsmouth Numbers (PN): are measures of performance. They represent times over a common but unspecified distance, and are expressed as whole numbers.
Primary Yardsticks (PY):are Portsmouth Numbers published by the RYA and well attested by many clubs over several years.
Secondary Yardsticks (SY):are Portsmouth Numbers published by the RYA but not as consistently attested as Primary Yardsticks.
Recorded Numbers (RN): are Portsmouth Numbers published by the RYA on the basis of limited information.
Trial Numbers (TN):are Portsmouth Numbers allocated by clubs until a Recorded Number is assessed.

Sunday, 18 April 2010

Club Handicaps & Bostock Cup

To track and record my sailing progress, I have decided to publish the race results and how I have performed against handicap. I will advise that this is purely for my own reference and interest.

I have used the Results Worksheet which is published on the RYA website and build by the Portsmouth Yardstick Advisory Committee. If you like me are interested in statistics it provides fascinating results.

Standard Corrected Handicap (SCH)
The way it works is as follows....

For any given race, there will be an unknown theoretical ‘best possible’ corrected time that could be achieved by a boat sailing perfectly, tacking on the right wind shifts, avoiding adverse currents, etc. In practice boats are not perfect and their crews make mistakes that cause them to sail slower than this optimum. The resultant distribution of corrected times across a fleet will typically be ‘skewed’ since it is easier to make mistakes than to avoid them. A few boats may come close to the theoretical achievable time, some will make an average number of mistakes & there will be a diminishing tail of slower boats making increasing numbers of errors. Performance assessment requires a comparison standard against which to measure each boat. If this standard is simply the average of all corrected times in a skewed distribution, it will be weighted towards the poor performance end and the majority of boats will appear to have sailed better than ‘average’, distorting the assessment. The performance standard is defined instead as the corrected time achieved by the largest group of boats; that is the peak or ‘mode’ of the distribution. Boats that achieved this Standard Corrected Time (SCT) will have sailed ‘to handicap’.

Click on image for more detail

The YR2 procedure allows for the typical 'skewed' distribution in calculating the SCT. The average of corrected times for the top two thirds of the PY, SY & RN boats in the race gives the Average Corrected Time (ACT). ACT+5%, corresponding to the statistically average performer relative to handicap two thirds down the fleet, defines the 'poor performance' limit. The corrected times of all PY, SY & RN boats faster than ACT+5% are then averaged to give the SCT for the race. This new group of boats may be the same as the original two thirds or more or less, depending on the performance distribution in each race. The elapsed time for each boat is divided by the SCT and multiplied by 1000 to give its 'achieved performance'. Corrected times worse than ACT+5% are defined as 'poor' and should be excluded in calculating a boat's average performance for handicap assessment.

PY Handicaps
The handicaps I have used are those published by the RYA. The one assumption I have made in my calculations is that the handicaps of the Wivenhoe Ones are well established and can be included in SCT calculations.

Bostock Cup Results

Click on image for more detail

Handicaps and statistics are very interesting things. The Xenon crossed the finish line second, came 8th out of the club handicaps and 4th in the RYA handicaps (2.3% above par on today's sail).

If you spot any obvious errors let me know.

Friday, 11 September 2009

Topper Xenon and Endeavour Championships

I could hardly own a Topper Xenon and not make mention of the RCYC Endeavour Championship.

Well, here goes - The RCYC Endeavour Championship is a unique event in the UK dinghy sailing world, recognised by the RYA as the pinnacle of that year's dinghy sailing achievements which will hail a "Champion of Champions". Held on the tidal waters of the rivers Crouch and Roach every October, it's an invitation only three day event, with the guest-list hand-picked from National Champions of selected fleets.
Once the year-long preparations for the event are complete, the Topper pantechnicon arrives in Burnham containing thirty 'box-fresh' Xenons and the Topper technicians (dogs-bodies) who prepare the boats for the competitors. The Friday is a training day of Olympic standards when the entrants get the chance to familiarise themselves with the dinghy that may help to them to realise their dream "...over the hallowed waters of the Rivers Crouch and Roach". The Saturday and Sunday is a relentless progression of eight races, whatever the weather...

So I wait for my invitation and see if I am able to swap Xenons for a slightly newer model...October right? I'll save the date!

So why a Topper Xenon for this event?.......the continuing choice of the Xenon for the Endeavour Championships solves two problems at a stroke. Previous entrants considered that the RS400 (the previous boat) was a handful for lighter crews and there were occasional difficulties with availability. The Xenon's crew weight is pitched between 18 and 24 stone and Topper continues to supply all the boats so entrants need only arrive in the dinghy park to find a boat awaiting them (cheers easy).

hmmm.... at this point all I will say is my crew and I need to loose some weight...picture above is from http://rodtinsley.co.uk/ and is of Steve Tylecote and Toby Lewis who won in 2007. Looks just like me and the Barman.

ps. look how flat they have the boat