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PY Inflation?

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Sussex Lad View Drop Down
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    Posted: 24 Aug 22 at 10:50am
.....and to add to my previous rant ;-)

Any handicap system based on returns and number crunching is not going to work on one off races anywhere.

The PY system wasn't (I think) intended to work on anything other than a longish series of races, say a spring series or summer series etc. where weather conditions can average out. Waste of time on one off's.

I'll shut up now as I don't want to upset anyone's Karma (too much) lol
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ChrisI View Drop Down
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Post Options Post Options   Quote ChrisI Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 12:35pm
"....IMO it's time the RYA invested more time and money in sorting it out".

SL.... agreed, It is definitely the case that tide should affect handicaps. Although if the boats sailed at a club are quite close (eg Laser and Enterprise) then adjustments are very minor - and wind strength probably more important. But it also depends on the race course. On the Thames we mostly sail two hours before high water until HW itself, sailing up with the tide and back down and around, but when low waters are in the middle of the day we sometimes do downriver races on the ebb, to a turning buoy timed for approx low water then back on the flood. So of course handicaps for these two types of races should strictly speaking be quite different (.....as you say slower boats are advantaged when tide is with you all the time). Some clubs like HISC take a view and presumably because their race configurations are generally similar decide on a general formula for their own handicap adjustments (https://www.hisc.co.uk/media/1098/hisc_handicap_description.pdf).

But when you say the RYA should invest more time and money in sorting it out what are you looking for....... a quadratic equation of some sort with variables of the percentage strength of tidal flows and the percentage direction of flows during which parts of the race? While you are at it others will probably want average wind speeds included during the first part of the race while the fast boats are sailing or the the whole race while the slow boats are sailing or.....etc etc?

Surely adjustments are best done by the club itself that knows its waters best, exactly as HISC have done, rather than being dictated from above?


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fab100 View Drop Down
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Post Options Post Options   Quote fab100 Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 2:31pm
Lights touchpaper and stands back...

Tide: what about the lee-bow effect? Evil Smile Evil Smile

I'll get my coat...

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Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 2:48pm
Originally posted by Neptune

Ignoring tide and all that, the Great Lakes handicaps have a majority, and I say that loosely, slower boats getting slower too and there ain’t no tide inland for sure.   While tide is an impact on leg length, boat manoeuvres also have a bigger impact on speed the faster you go, so slower boats on shifty inland water and small course should be favoured!

Im not sure the point you're making here but from what i've seen and experienced the Great Lakes numbers only kind of work to a point in a very large fleet sailing a smallish course with a lot of dirty wind. Which is pretty much what they were intended to do.

At any other time they disproportionately favour the less well sailed slow classes, and I think this is because the sample size is reduced. It's a trade off - you only use the returns relevant to these events, but if only bronze fleet (for example) Miracle sailors turn up the national champion will walk the series the following year.
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Post Options Post Options   Quote The Q Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 3:08pm
Originally posted by fab100

Lights touchpaper and stands back...

Tide: what about the lee-bow effect? Evil Smile Evil Smile

I'll get my coat...

Works on the broads in some places where you can balance the water pressure off your bow against a hard quay heading, while you are sailing along 6 inches from the heading at a strange angle..

until...

You pass a dyke, then if you're not quick you go piling into the other side of the dyke..
Still sailing in circles
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Post Options Post Options   Quote seasailor Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 3:08pm
When I were a lad I remember racing a cadet against all sorts of other faster boats. You often had to beat up the shore against the tide, then judge when to head out into the middle of the estuary to be able to get round the windward mark.

In a cadet you had to go much further up the river before you dared to try to make it across. So you were not just slower but had to sail further. Also, if a 505 misjudged the crossing they could tack and sail against the tide in the channel. If I did that in a cadet I would never make it.

I agree with the idea that slower boats are disproportionately adversely affected by the tide.

At my current club we sail some series on PY, some where a correction factor is applied to account for tide and one with personal handicaps.


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Post Options Post Options   Quote Sussex Lad Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 3:17pm
Originally posted by ChrisI



But when you say the RYA should invest more time and money in sorting it out what are you looking for....... a quadratic equation of some sort with variables of the percentage strength of tidal flows and the percentage direction of flows during which parts of the race? While you are at it others will probably want average wind speeds included during the first part of the race while the fast boats are sailing or the the whole race while the slow boats are sailing or.....etc etc?

Surely adjustments are best done by the club itself that knows its waters best, exactly as HISC have done, rather than being dictated from above?




This where it gets complicated.....

Your second para in my quotation.
On paper you are right the club that knows it's waters is best positioned to adjust the numbers.
In reality this will never work for various reasons:

Lack of expertise within the club.

Over burdening the club with another volunteer job that needs doing. It then gets done for a season, the volunteer gets some grief and then gets fed up with it and then the task is dropped.

..... and this is the most important part......What folk are comfortable with ......In short: Moses receiving the tablet of stone from God is a marvellous parable in this context. Many, many people, atheists and all are emotionally more comfortable with this approach to directives........this is also why I would advocate that the RYA do it. It needs to have authority and people need to have faith in it.

Regarding your first above para:
I cannot believe the PY team haven't got enough data over the years to do a comparison just to see How boat speed is affected by a tidal stream. Don't compare classes because classes develop and get faster (maybe), compare PY groups, see how it affects the average results of boats within a certain py band. Compare various categories of venue in the same way........They have years and years of data all of which is relevant. It would take time and expertise and require some investment of cash no doubt.

Regarding the desire by some to investigate wind strength, gustiness, including (no doubt) humidity, temp and state of the crews underpants......well what can I say?

No system devised by man is flawless, this includes the current PY system (obviously). The question is not how we can make it perfect? The question is how can we make it less flawed? 

I would suggest we start with tide. It's predictable, easier to isolate and it's quantifiable.

To stay on topic:
If the slow boats PY's are increasing and the fast boats are decreasing and this is because of more returns from coastal clubs what will we end up with?





Edited by Sussex Lad - 24 Aug 22 at 3:22pm
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Dakota View Drop Down
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Post Options Post Options   Quote Dakota Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 3:33pm
Think we need to establish IF returns for coastal clubs  are a bigger percentage of total returns than they used to be before we move to what we will end up with . Smile
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Sussex Lad View Drop Down
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Post Options Post Options   Quote Sussex Lad Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 22 at 4:13pm
That'll be why I used the word If.  Wink

A purely speculative question.

Edited by Sussex Lad - 24 Aug 22 at 4:14pm
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 25 Aug 22 at 7:14am
Simple solution is to go one design class racing … no hiding there
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