Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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Laser 140101 Tynemouth |
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Laser 28 - Excellent example of this great design Hamble le rice |
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List classes of boat for sale |
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Scooby_simon ![]() Really should get out more ![]() Joined: 02 Apr 04 Location: United Kingdom Online Status: Offline Posts: 2415 |
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Not so much now....
[runs and hides] |
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Wanna learn to Ski - PM me..
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Merlinboy ![]() Really should get out more ![]() Joined: 03 Jul 06 Location: United Kingdom Online Status: Offline Posts: 3169 |
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Jim i think you are wrong and usless everyone returns results otherwise it will never be proved! How could they cut a handicap by such a huge margin it needs to be prgresive and inline with development. A sudden 100pt drop would cause Outrage! (i know that is a little extreme) |
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Lukepiewalker ![]() Really should get out more ![]() ![]() Joined: 24 May 06 Location: United Kingdom Online Status: Offline Posts: 1341 |
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It seems a bit unfair to call Jim useless...
But i'm with him. If the data supported it the change would be made. But for most classes where dramatic changes might be expected (usually smaller in numbers), it probably takes longer for the difference to be quantified as there are less of them around. |
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JimC ![]() Really should get out more ![]() ![]() Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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I base my opinion on having talked to the people who run the system, on having seen some of the data they use, and on having done a great deal of manipulation of handicap results, what ifs and the like. Oh and a science education that finished up at Imperial College, London. What do you base your opinion on? |
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mike ellis ![]() Really should get out more ![]() ![]() Joined: 30 Dec 05 Location: United Kingdom Online Status: Offline Posts: 2339 |
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as an example of that i would say moths going from being stupidly narrow to flying. personally i think that it doesnt really matter what py you race off because club racing for me is just a laugh. i treat every club race as a training race and if i can be bothered and can talk parents round i will go to an open to see how much i have improved if at all but i like just hanging around at the club with mates and we all sail in lasers so py doesnt bother us much but even the guys who sail other classes (3ks, mirrors, fevas and anything else that turns up) realize that we only race for fun and it isnt to be taken seriously. having said this we do make py returns. |
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600 732, will call it Sticks and Stones when i get round to it.
Also International 14, 1318 |
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Medway Maniac ![]() Really should get out more ![]() ![]() Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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Prompted by a comment above, I just went and 'pressed the button' in Sailwave to re-calculate the PY's for a 61 entry, 17 race Wednesday series at Wilsonian (i.e. a series offering plenty of data). The Blaze which finished 2nd using 1047 (this was in 2005) got a recommended PY of 1008. 'Quite right' I hear a lot of you saying, nodding sagely. But wait, a Phantom came 3rd on 1047 but that class got a recommend of 1085, and the winning Laser 3000 did so on 1030 but the class got a recommend of 1101 (nice!). Why? Because the Blaze was the only Blaze racing, whereas there were other Phantoms and L3k's further down the fleet. All this exercise shows is that you need to have a whole heap of data to make any meaningful estimates as to PY corrections. I'd suggest that only the RYA can hope to collect enough. It certainly supports the suggestion that we should make weekly race result returns to the RYA - that's a great idea and would be easy to use if set up correctly. Fiddling about at club level causes a lot of unrest and everyone except the winner tends to judge the modified system as being 'arbitrary'. RYA PY's are hardly ever correct for any particular weather or location, but they are not bad on average (over series) and there can be no suggestion of favouritism.
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Bruce Starbuck ![]() Posting king ![]() ![]() Joined: 14 Sep 04 Location: United Kingdom Online Status: Offline Posts: 124 |
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"I don't know if it can happen, but I think it should. The handicaps should be decided by a committee with the power to override the returns system. They should use the returns PLUS the performances from the large Winter handicap events, the Bloody Mary, Tiger Trophy etc. The figures should be changed every year and announced at the Dinghy Show. Take the Merlin fleet as an example: the top new boats are competing in large handicap events such as the Bloody Mary off a handicap as determined by the folks who club sail in their older boats. It's completely flawed. I believe a class's handicap should reflect the performance of the very latest(best) boat in that class, not an average of all the boats. If the class then wants to recommend classic handicaps to older examples then all well and good. There are certain inescapeable truths which everyone knows, for example: Merlins, Fireballs, Phantoms have a good handicap, Lasers have a bad handicap. There will be many other examples I'm sure. So why they can't just be changed is beyond me. I can't see any harm in changing them A LOT either. If it goes too far and all the Merlins come in the bottom half of next year's Bloody Mary then so what? It can be changed back straight away. If everyone knows the handicaps are fluid and will be changed yearly then it won't cause any harm, just add another level of interest and controversy to handicap racing. " |
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49erGBR735HSC ![]() Really should get out more ![]() ![]() Joined: 30 Mar 05 Location: United Kingdom Online Status: Offline Posts: 1991 |
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You will never get a 100% accurate measurement of handicap under the PY system as has been discussed before as PY's are based on averages to try and aid consistancy. If you base the PY on the front of the fleet, everyone behind the front runners moans about their PY being unfair and in vice versa, you base it on the back of the fleet and suddenly a boat becomes a bandit as its sailing quicker than its PY in the majority case. The way I have always thought of it is that every boat has their day and just accept some days the boat won't perform optimumly but it should balance itself out over time if you are consistant. Andy Rice said in Roll Tacks a while back that if you want to win the Bloody Mary (think it was that event?), you need to bring a double stacker with a 420 and 14 on it, think he hit the nail on the head with that analogy. In the same instance, a N12 will out perform a 200 on a small lake, and vice versa at a long course coastal event. With a lot of effort you could probably predict performances through calculations for the classes, but you'd have to adjust handicaps for varying wind strengths as various boats have different optimum performing conditions, then RO's will be faced with the argument of "You had me on my medium wind strength handicap when there was no wind.............etc,etc,etc". Then you also have to assign a body to calculate the handicaps, seems a lot of work for the RYA, and not wanting to sound synical but if you left it to the boat builders you'd have the boats on silly numbers, a Vago would be on about 900 odd with the 800 rated right next to it, as the handicap numbers can be a focus point of buyers. I don't know the in's and out's of the cat system so don't know if a rule like that could be applied to mono's, maybe Simon could shed some light, wouldn't mind looking into it myself. At the end of the day, PY racing is probably the best rating system for dinghys. Remember growing up sailing my Laser 2 at HSC and getting beat by 505s quite a bit initially, didn't moan about the 505 being a bandit boat because it was winning everything, just accepted the guys ahead of me were extremely good sailors and got on with it and tried harder...
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Scooby_simon ![]() Really should get out more ![]() Joined: 02 Apr 04 Location: United Kingdom Online Status: Offline Posts: 2415 |
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Dennis et al, The major problem in using measurement for mono dinghy's is that (as I see it)you (somehow) have to factor in the fact boats plane at differet wind speeds and on different points of sail. We don't really consider cats "plane" in the same sense and so don't need to worry about it. Consider a 49er that planes very early down hill and a Flying 15 that will plane in about a F6 (I assume). Upwind the 49er will plane, the FF won't. how do you factor that in? We did not put a windspeed factor into SCHRS as we decided we could rate it via righting moment and that we would create OOD's and organisers more problems by asking them to declare a "wind factor" which is subjective. The 49er is SO much faster when on the plane and this (say) happens in 9kts of wind downwind and 12 upwind. The FF never planes upwind, so how do you rate these to boats ? The FF will plane downwind and so you DO need to consider that it does plane. Can you calculate the max hull speed of a planing hull. I'm not sure but I guess not. I'll not bore you with all the problems I think there would be, but rest assured, I'm yet to be convinced a SCHRS type formula could be applied to rating all mono's. maybe for all boats of a similar type (so powerfull asym's say.) |
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Wanna learn to Ski - PM me..
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Medway Maniac ![]() Really should get out more ![]() ![]() Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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Well said, Scooby - exactly the response I wanted to make. You can of course estimate the relative performances on different points of sail in different windstrengths, then apply statistics to come to an 'average' figure* (assuming you are prepared to agree how much time boats spend on different points of sail and you can find a windspeed frequency distribution statistic somewhere - I can't), but by the time you've done that and introduced all sorts of assumptions and inaccuracies, you'd be better off relying on the RYA feedback system. (* actually, I've attempted it, and the exercise does help explain why some boats win in certain conditions and can allow you to compare very similar boats, but I'd never suggest using it in place of the official PY's.) |
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