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GB Sailing Challenge - still confused

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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Topic: GB Sailing Challenge - still confused
    Posted: 26 Nov 18 at 3:43pm
Originally posted by turnturtle

Originally posted by Sam.Spoons

Making line honours the aim in a mixed fleet would involve banding at a fairly narrow level or boats with a PN at the top of the band would have little hope of a result. The speed difference (to take an extreme example) in our junior fleet between the Optimist and Laser 4.7s is fairly huge. Likewise between a GP and a Merlin. I'd say a PN difference of 100 points would be more than enough to discourage the slower boats in each band from turning out. I should point out I'm not a 'winning is everything' type (just as well given my results these days though I've done my share in the past) but it's nice to know you might be in with a chance of the odd decent result if everything comes together.

Let’s apply real world observations to that:

Kids classes - typically sailed in class in many clubs.  the club is either a Tera club, Oppy club, mirror club, cadet club etc.  Or if it really is a hotch-potch, do yourself (and your kids) a favour and move to one with some consistency.

Kids sail Oppis, Teras, Open Bics or (insert your kiddy class of choice here) progress to Toppers (etc.) and then to Laser 4.7, so I'm not sure what your point is? But if you confined it to Oppi, Tera and Open Bic the differential would be quite small but it doesn't matter which of those you put up against a Laser 4.7 it's going to get mullered.

Merlin and GP - not in the same category surely?

Agreed, 1133 against 980 is way over 100 points. So how many points should a performance band span?  

You also reference PY in the discussion... over time that metric would be lost, so the context loses relevance.

Again not quite sure of your point here, WRT handicaps the accuracy of the numbers will improve over time as the stats accumulate.

Even so, you are saying 100 points....  is a £500 sh*tter from the nettles not 100 points slower than the latest Laser with XD kit and a carbon top section?  Yet that £500 sh*tter can still outperform the new one given the right sailor of the right weight pointing it in the right direction.


The biggest difference between the fastest and slowest Laser on Sunday was 10% so equivalent to 108 points, how much of that comes down to the boat and how much to the sailor? TBF though that last boat was probably not a £500 dog (but the one that came first was fully bimbled......) so you may well be right there.




Edited by Sam.Spoons - 26 Nov 18 at 3:44pm
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 3:52pm
Originally posted by H2

I actually learned more in 5 hours of that then months of winning at SCSC each weekend.

What I'm getting at, is do you know what went wrong in the race you came 62nd? Where did you lose those twenty places? Or conversely where you gained them in the 42nd? Did you actually perform quite well in the 46th, making big gains on each leg, but just got a bad start or an unfortunate shift on the first beat? Can you correlate your performance with your result?

Those tend to be things that decide how rewarding I find the racing. In handicap racing the nuances of that get lost in the noise of different boats strengths and weaknesses. I often just end up looking at boats in my class... which makes me think, I'd be happier racing against a handful of my own class at a small open or in club racing and have less obstacle to get around!

If the new scoring, or data analysis could tell me more about how I was performing and where really I was doing well or not, then I might see more value in it.  

Your results above, which system are they from?  Which score (GL or Dynamic) better reflected your performance and why? 




Edited by mozzy - 26 Nov 18 at 4:01pm
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Post Options Post Options   Quote turnturtle Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 3:56pm
 I don’t doubt that statistically accuracy can be validated as better now than then, however does that neccessarily translate to better quality of racing.... 

I read H2’s last post- great stuff and a good read.  But out of that prose, nothing relating to the change of calculation formula, or indeed the handicap itself, suggested this played any part whatsoever in his enjoyment of the day.... therefore could it not be better than those boats closest enough ‘in category’ were actually racing for line honours, rather than some retrospective calculation?

I dunno ... but my point is that that would actually be a qualititive experiment to genuinely carry out before writing off the concept altogether as ‘unworkable’.  


Edited by turnturtle - 26 Nov 18 at 3:58pm
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:06pm
I think we all set our own personal PN bands, I subconsciously race against the Phantoms, Finn, D-Zeros and Solution as they are all within a few dozen points of the Blaze. It's a bit like my Raceboard days, the big strong guys had an advantage in a blow, the lighter sailors in the light (with the exception of the odd pumping expert) but there's no question that the sailor makes the most difference. 
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:16pm
A classic example of how the handicap system as it currently stands screws things up, is the relationship between the Blaze and the Phantom which in our world can rub along quite nicely scratch, indeed they were pretty much scratch until too many inland wallers saw the bandit capability of the Phantom in light weather, this was going on when I first started taking notice of all things handicap.
Yet a Blaze will absolutely destroy a Phantom once it's well powered and racked up, again weather driven, no amount of handicapping is going to alter that, yet they did just to placate the pondies. and along with a few other key favourites getting the slow treatment the Blaze now enters Bandit territory itself, a victim of selective handicapping. In a banding system they'd race together scratch.

Edited by iGRF - 26 Nov 18 at 4:41pm
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Post Options Post Options   Quote turnturtle Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:17pm
Originally posted by Sam.Spoons

I think we all set our own personal PN bands, I subconsciously race against the Phantoms, Finn, D-Zeros and Solution as they are all within a few dozen points of the Blaze.

Quite - and would you be comfortable for your club committee setting those bands for you say, annually?  Even if it meant those boats on the peripheries of what becomes the clubs ‘new normal’ flip-flopped a bit between groups to find which worked best for them?  

I’d predict that give it 5 seasons or so to settle down and even the flip-flop classes would neutral out as they seek traditional PY down the road, or the owners change boats to something offering closer racing.... thus leaving clearer bands of like-for-like boats actually racing together, thus offering a club racing / light hearted alternative to travelling for proper racing... something I personally think the UK dinghy scene is crying out for.


Edited by turnturtle - 26 Nov 18 at 4:26pm
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Post Options Post Options   Quote H2 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:29pm
Originally posted by turnturtle

 I don’t doubt that statistically accuracy can be validated as better now than then, however does that neccessarily translate to better quality of racing.... 

I read H2’s last post- great stuff and a good read.  But out of that prose, nothing relating to the change of calculation formula, or indeed the handicap itself, suggested this played any part whatsoever in his enjoyment of the day.... therefore could it not be better than those boats closest enough ‘in category’ were actually racing for line honours, rather than some retrospective calculation?

I dunno ... but my point is that that would actually be a qualititive experiment to genuinely carry out before writing off the concept altogether as ‘unworkable’.  

But hang on - if it was not for some form of Handicap system I would not have been out sailing against 100+ random people on Draycote. It was the handicap system that enabled me to turn up and take part, otherwise it was just a random days sailing on a lake in the midlands. However flawed the system is it enabled me to have a great days sailing!
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Post Options Post Options   Quote H2 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:33pm
Originally posted by mozzy

Originally posted by H2

I actually learned more in 5 hours of that then months of winning at SCSC each weekend.

What I'm getting at, is do you know what went wrong in the race you came 62nd? Where did you lose those twenty places? Or conversely where you gained them in the 42nd? Did you actually perform quite well in the 46th, making big gains on each leg, but just got a bad start or an unfortunate shift on the first beat? Can you correlate your performance with your result?

Those tend to be things that decide how rewarding I find the racing. In handicap racing the nuances of that get lost in the noise of different boats strengths and weaknesses. I often just end up looking at boats in my class... which makes me think, I'd be happier racing against a handful of my own class at a small open or in club racing and have less obstacle to get around!

If the new scoring, or data analysis could tell me more about how I was performing and where really I was doing well or not, then I might see more value in it.  

Your results above, which system are they from?  Which score (GL or Dynamic) better reflected your performance and why? 



Yes I know what went wrong - I had a duff start and had to make compromised decisions up the first beat and then was unable to claw back much on the next few legs. I was able to visit the website after and see this happen by following my GPS trace and my dynamic positions change over each race!

It would not take much to turn the GPS units into both send and receive and allow each boat to know their current position either using the RYA PY, Great Lakes or some black box formula. Frankly I would not mind much what they used. The RYA say I should race off 1037 but I actually race of 1022 at South Cerney and its never worried me much, I just get on and race.
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Post Options Post Options   Quote turnturtle Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:53pm
Originally posted by H2

Originally posted by turnturtle

 I don’t doubt that statistically accuracy can be validated as better now than then, however does that neccessarily translate to better quality of racing.... 

I read H2’s last post- great stuff and a good read.  But out of that prose, nothing relating to the change of calculation formula, or indeed the handicap itself, suggested this played any part whatsoever in his enjoyment of the day.... therefore could it not be better than those boats closest enough ‘in category’ were actually racing for line honours, rather than some retrospective calculation?

I dunno ... but my point is that that would actually be a qualititive experiment to genuinely carry out before writing off the concept altogether as ‘unworkable’.  

But hang on - if it was not for some form of Handicap system I would not have been out sailing against 100+ random people on Draycote. It was the handicap system that enabled me to turn up and take part, otherwise it was just a random days sailing on a lake in the midlands. However flawed the system is it enabled me to have a great days sailing!

True - although the irony of it is that the handicap system bore (little to) no impact on said day; so in effect, all you were doing was a day out sailing with 100+ random people in the midlands whether you like to admit it or not.   

That being the case, why not ditch the handicap system altogether and just arrange it like a festival of sailing in broadly aligned categories, free from this overly analytical BS that is supposedly the future of dinghy sailing?  


Edited by turnturtle - 26 Nov 18 at 4:55pm
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Post Options Post Options   Quote getafix Quote  Post ReplyReply Direct Link To This Post Posted: 26 Nov 18 at 4:58pm
OK, so two or three more pages to get back to the point we were at then.  People who have an axe to grind against a handicap system will grind it (ceaselessly) and those of us who accept such things must exist and a happy to get on because we enjoy the mixed competition and aren't too fussed about the overall result as long as we have a good sail.... will do our thing.

Personal handicaps instead of boat handicaps will soon fall foul to the same blah blah.  In a sport with so many variables it's nigh on impossible to think of an even 75% accurate system.

Well done to those willing to try and mix things up and come up with something new.  Well done to the volunteers who turn up and run the races and stick the results in the computers so we can all see them afterwards.
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