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PY numbers?

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speedy gonally View Drop Down
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Post Options Post Options   Quote speedy gonally Quote  Post ReplyReply Direct Link To This Post Topic: PY numbers?
    Posted: 29 Oct 06 at 9:15pm
Hi i was just wondering about people's views on PY numbers.
Usually i dont think too much about them but after last weekend sailin at the Scottish Champion of Champions it got me thinking.
Here the used light wind and heavy wind PY numbers which was a first for me
firstly what is the break for heavy winds and light winds because fot the topper it would find it heavy winds but in the 505 i found it medium lightish conditions.
Also the handicaps just didnt seem to fit.  The 505 was between 900 and 904 which made sense but the Laser 4000 had 906(light) 892(heavy) and im pretty sure there normal handicap is 908.
I havent yet checked the handicaps af the other boats but it does seem rather strange
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jeffers View Drop Down
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Post Options Post Options   Quote jeffers Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 06 at 12:04pm
Speedy,

You are opening a whole can of worms here...

PY is an average of all clubs that submitted returns for all boars over a range of coniditons. It gives and average relative speed of boats. As we all know there are some boats that have a noticable advantage in light winds (COmet, British Moth) and some that have an advantage when the wind gets up (Cherub, Fireball).

The PY is the average speed of the average sailor in average winds (as long as an even spread of returns has been submitted). There are some boats (noticably Phantoms at my club) that just do not go out when the wind is over a F4-5, this can skew the returns if enough sailors do the same.

What you seem to be getting at is an idea of personal handicaps which seem to work great for a lot of clubs that use them but are very admin intensive.

There used to be a couple of guys from the RYA PY panel that lurked here, one of them may see this and respond.

I will point out this is my understanding of how the system works and it could be wrong...

Paul
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Post Options Post Options   Quote FredF Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 06 at 11:15pm

Good points Speedy. We were there as well, handicaps were peculiar. Tasar handicap was its normal one and did'nt change at all. As for strong winds it never got over a 2/3. PY's should be a reflection of a wide range of conditions, as Paul says there are obvious advantages and disadvantages but in general should not be altered unless the calculations are done for personal handicaps.

FredF

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Post Options Post Options   Quote NeilP Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 11:24am

I'd strongly suggest to anyone considering the use of light/heavy airs PN variations: don't!!

Ask yourself what the next stage is. People wanting a PN variation for light/heavy crew? Flat water/waves? Different courses? For example, If all the racing in the UK was done over windward/leeward courses a lot of PN's that are very well-established would probably change significantly. Does that mean clubs should vary PN's when sailing W/L? Dangerous path to go down if you ask me. I'd have thought handicap racing was the less serious side of dinghy racing, so as long as you have a number that gets close to reflecting your boat's performance most of the time, I'd leave well alone!

Neil

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Post Options Post Options   Quote Razerlarf Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 12:05pm
IMHO, the sailing venue (open sea, tidal, tree lined reservoir) will affect the fair handicap of any boat, so it makes sense to me, if you have enough data, to adjust published PY #'s on an annual basis (as suggested by the RYA), much as one makes annual returns.
Undoubtedly, daily variations are significant, but I would strongly advise against going there, unless you have a team of lawyers on your side   (Is that why some clubs in the USA use wind adjusted ratings )
And yes Personal Handicaps are a good leveler, but they are hard work for the handicapper, require a lot of data (to take out the daily effects), and all the time the sailors are probably getting better / the boat's wearing out
MikeC
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Post Options Post Options   Quote Matt Jackson Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 1:05pm
Originally posted by NeilP

I'd strongly suggest to anyone considering the use of light/heavy airs PN variations: don't!!

Ask yourself what the next stage is. People wanting a PN variation for light/heavy crew? Flat water/waves? Different courses? For example, If all the racing in the UK was done over windward/leeward courses a lot of PN's that are very well-established would probably change significantly. Does that mean clubs should vary PN's when sailing W/L? Dangerous path to go down if you ask me. I'd have thought handicap racing was the less serious side of dinghy racing, so as long as you have a number that gets close to reflecting your boat's performance most of the time, I'd leave well alone!

Neil

I agree. Unless you are willing to change every class PY that asks for it then it's just a good way of dividing your membership. You can only really adjust it if you have a big fleet with mixed ability. You don't really want change the handicap on a small fleet as they might all be very good and that esentially becomes a personal handicap for those sailors but applied to a whole fleet, inhibiting class growth.

As a sailor of a class who's handicap varies dramatically above and below trapezing conditions (F3ish) I just take the long view in that these things even out over a series. Of course short series and one-off events are a bit of a lottery but that's life.

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Post Options Post Options   Quote jeffers Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 1:09pm
PYs do rely on a fair course fo all types of boat as well. When I am RO at Hunts I walys try to make sure I get in 2 beats, 2 reaches and reasonable length run so all boats can play to their stregths.

There are days when we get no runs and I love it in the Blaze. When I sailed the Laser or the Fireball I preferred long runs as you can go deeper and faster (especially by the lee on starboard in a Laser....)

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Post Options Post Options   Quote Matt Jackson Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 1:18pm

Our lake is quite long and aligned along(ish) the prevailing wind so we often get either a long beat (hurrah!) and several deep reaches (boo!) or several short beats (Hmm) and some deep reaches (Booo!) followed by a really long run (BOOOO!!!).

Of course if it's blowing old boots it's Hurrah! all round as I just plane all the way round the course!

Don't think even the smartest, fairest RO could cope with a fair handicap for those conditions.

Laser 203001, Harrier (H+) 36
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Post Options Post Options   Quote jeffers Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 2:14pm
Luckily Hunts lake is pretty much a square.......Just means they get to play with the shift winds near the trees.


Edited by jeffers
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les5269 View Drop Down
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Post Options Post Options   Quote les5269 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 06 at 8:56pm

Originally posted by jeffers

Luckily Hunts lake is pretty much a square.

A square ?

I thought it was more round than square

We have some pretty shifty conditions at grafham and it's quite a bit larger!

(p.s are you doing the Gran Prix this year?)



Edited by les5269
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