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SCHRS revisions are now on the website

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Category: Multihulls
Forum Name: Dinghy multihulls
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URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=2746
Printed Date: 29 Jun 25 at 6:59am
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Topic: SCHRS revisions are now on the website
Posted By: Scooby_simon
Subject: SCHRS revisions are now on the website
Date Posted: 04 Mar 07 at 12:38pm

All,

It gives me great pleasure to announce that the revisions to the ISAF Small Catamaran Handicap Rating System (SCHRS) have been uploaded to the  http://www.schrs.com/ - SCHRS website .

We have updated the rule set as well, this can be found  http://www.schrs.com/index.php?page=system - here

We have also calculated a selection of ratings for the boats that we believe we had have a complete set of ratings points for, this can be found on the website soon.
If your boat is listed without a rating, we should indicate on the list the rating point we are missing.  Please send that to me, I can be contacted by following this  mailto:simon@schrs.com?subject=Information%20request%20from%20SCHRS - simon (at) schrs.com

We are also putting the final polish to a utility that will allow you to calculate the expected rating for a given set of rating points; this is yet to be uploaded to the website, but will be available soon, I will advise when this has been uploaded.

We have also collated a list of FAQ's that we think people may ask, this can be found  http://www.schrs.com/index.php?page=faqs - here .


I would like to thank all the members of the SCHRS Rule Management Group for there assistance in formulating the new ruleset:

Simon Longstaff – Chairperson, U.K.
Olivier Bovyn - ISAF Rep., France
Colin Whitehead – Member, South Africa
Olly Harris - Technical, U.K.
Jason Smithwick - ISAF Rep. and Technical, U.K.
David Chivers - Measurer
Simon Forbes - ISAF Staff
Geoff Balfré - Web Site



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Replies:
Posted By: English Dave
Date Posted: 05 Mar 07 at 8:42am

I don't want to sound lazy, Simon, but publishing the formula is one thing, publishing the ratings, quite another.

I like the diagrams, though. Features a cat with non-squaretop main, folding centreboards, traditional raked bows and spinnaker. Yep, It's a Hurricane SX!

Many thanks for all your hard work (unless it disadvantages my boat).



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English Dave
http://www.ballyholme.com - Ballyholme Yacht Club

(You'd think I'd be better at it by now)

Hurricane 5.9 SX
RS700


Posted By: catmandoo
Date Posted: 05 Mar 07 at 9:54am

sorry to have to agree with mr Dave , not exactly what we have ALL been waiting for.

I appreciate too all the hard work you have gone into and that you have a day job too  

You said you are working with sailwave , but are you working with Hal too - another very popular results system and unfortunately the one my club uses , I prefer Sailwave .

Any idea on how long the calculation utility will be , soon ?

 

 



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Posted By: Scooby_simon
Date Posted: 05 Mar 07 at 10:53am

Chaps,

I do not have the access to update the website.  Thus I am waiting for the webmaster to do it.  Fingers crossed.....



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Wanna learn to Ski - PM me..


Posted By: Scooby_simon
Date Posted: 05 Mar 07 at 5:26pm
Originally posted by Scooby_simon

Chaps,

I do not have the access to update the website.  Thus I am waiting for the webmaster to do it.  Fingers crossed.....

 

THings are not going well;  Teh numbers may not be up tonight.



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Wanna learn to Ski - PM me..


Posted By: English Dave
Date Posted: 05 Mar 07 at 5:40pm

Scooby

Is it just an upload problem? Or are the calculations not finished?

Doesn't matter (to me) in the short term because our winter race series is in accordance with a Notice of Race published in October - but it will affect those Spring events who want to publish NoR and quote up to date SCHRS.



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English Dave
http://www.ballyholme.com - Ballyholme Yacht Club

(You'd think I'd be better at it by now)

Hurricane 5.9 SX
RS700


Posted By: Scooby_simon
Date Posted: 05 Mar 07 at 5:53pm
Originally posted by English Dave

Scooby

Is it just an upload problem? Or are the calculations not finished?

Doesn't matter (to me) in the short term because our winter race series is in accordance with a Notice of Race published in October - but it will affect those Spring events who want to publish NoR and quote up to date SCHRS.

It's partly that the turmoil on the markets are keeping me busy !

I just need to re-check the numbers, collate and get them uploaded;

If it is not tonight, it will be tomorrow.

Sorry, but this must be right as making a small mistake will feck everyone up.

 



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Posted By: Scooby_simon
Date Posted: 06 Mar 07 at 8:31pm
The numbers should be on the site at around 23:00 UK time

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Wanna learn to Ski - PM me..


Posted By: Scooby_simon
Date Posted: 07 Mar 07 at 12:30am

Originally posted by Scooby_simon

The numbers should be on the site at around 23:00 UK time

 

Or not as the case may be....Later today I guess



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Wanna learn to Ski - PM me..


Posted By: Scooby_simon
Date Posted: 07 Mar 07 at 7:40am
Originally posted by Scooby_simon

Originally posted by Scooby_simon

The numbers should be on the site at around 23:00 UK time

 

Or not as the case may be....Later today I guess

 

They are up now.



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Wanna learn to Ski - PM me..


Posted By: sailwave
Date Posted: 07 Mar 07 at 8:17am

NB: A SCHRS 2007 rating file for Sailwave is on the Sailwave website and Sailwave's integral SCHRS calculator has been updated to the new spec if you wanto fiddle - has presets for A,F16(1),F16,F18,Tornado and Spitfire.

http://www.schrs.com?page=ratings - www.schrs.com?page=ratings

http://www.sailwave.com?page=resources - www.sailwave.com?page=resources

http://www.sailwave.com?page=download - www.sailwave.com?page=download

CJ



Posted By: Scooby_simon
Date Posted: 07 Mar 07 at 9:26am
Originally posted by sailwave

NB: A SCHRS 2007 rating file for Sailwave is on the Sailwave website (with the A Class change) and Sailwave's integral SCHRS calculator has been updated to the new spec if you wanto fiddle - has presets for A,F16(1),F16,F18,Tornado and Spitfire.

http://www.schrs.com - www.schrs.com

http://www.sailwave.com - www.sailwave.com

CJ

 

Thanks...

 

Me also V bad (it was early afterall....).

 

There is a missing FAQ

Q: Why are two values given for "A-Class", based on two specific designs?

A: The Class rules for A-Class are very open and every boat should have it's own SCHRS rating and certificate. These values, for a current design at 2006 and another common older design, are published for guidance to show the range of ratings.

 

It's been a  chaotic few days, I can only apologize for MY mistake.



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Wanna learn to Ski - PM me..


Posted By: Major Iyeswater
Date Posted: 07 Mar 07 at 10:31am

Simon firstly well done to you and your team in managing to get these figures out in time for the start of most peoples sailing season.

 

Personally I was expecting to see more favourable gains for the older 2 sail boats like the Dart and Hurricane when compared to the now excepted three sail versions (2 for F16(1) etc?), are these figures now finalised or has the Committee gone for a “Halfway house” approach for a season to suck it and see for a season?

 

I was wondering if you could clarify why two versions of the Hurricane have got faster whilst one has got slower?

 

The SX should in my humble opinion be faster than the standard two sail version, in most wind strengths, and this has happened, albeit by only a miniscule amount.

 

The standard two sail version has got faster!  Is this because the formula now goes to three decimal places and may previously have been rounded up?

 

The Hurricane Sport has now got slower, is this because it was previously calculated incorrectly? Or has the all up weight of an SX been used as this would be incorrect for a Sport by my understanding.

 

Sorry if this post opens the floodgates but this is a discussion forum after all .


Posted By: Scooby_simon
Date Posted: 07 Mar 07 at 12:25pm
Originally posted by Major Iyeswater

Simon firstly well done to you and your team in managing to get these figures out in time for the start of most peoples sailing season.

 

Thanks, I'll pass it on, maybe I can get some sleep now...

 

Originally posted by Major Iyeswater

 

Personally I was expecting to see more favourable gains for the older 2 sail boats like the Dart and Hurricane when compared to the now excepted three sail versions (2 for F16(1) etc?), are these figures now finalised or has the Committee gone for a “Halfway house” approach for a season to suck it and see for a season?

 

 

We ran 1000's of simulations and re-ran races with the new handicaps and we feel these numebrs "feel" right

 

Originally posted by Major Iyeswater

I was wondering if you could clarify why two versions of the Hurricane have got faster whilst one has got slower?

The SX should in my humble opinion be faster than the standard two sail version, in most wind strengths, and this has happened, albeit by only a miniscule amount.

The standard two sail version has got faster!  Is this because the formula now goes to three decimal places and may previously have been rounded up?

 

Yes, rounding made differences here.

Also remember we are handicapping on all courses and all wind conditions; Yes the SX is quicker in the lighter stuff, but I bet there is a lot less of a difference ina  force 6. 

 

Originally posted by Major Iyeswater

The Hurricane Sport has now got slower, is this because it was previously calculated incorrectly? Or has the all up weight of an SX been used as this would be incorrect for a Sport by my understanding.

Sorry if this post opens the floodgates but this is a discussion forum after all .

For the SX and Sport we have all up weights of 192 and 191.5 kg, is one of these wrong ?



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Posted By: catmandoo
Date Posted: 07 Mar 07 at 12:52pm

when I sailed my sx there was a gap in supply of "whales Dicks " , hadn't gone into production , I sailed with sx jib self tacker etc , but with a graham eeles chute , I had to carry  an extra 2 kgs of lead to bring up to weight of current sx .

 

In the ratings there are no boat details shown as before , does schrs intend to do this , it makes it impossible to tell what varient of a class the rating refers to eg

A class cats , there's a few Bim A's and all must rate differently , weights can differ by 25Kgs , previously schrs only listed the bim 2000 the rest I assume fell under A class .

 

And I'm sure many others too - prindle and Inter being notorious for producing many variations under the same name .

Weldone sailwave in producing your ready calculator so quickly

 

Thanks too to Scooby and team , your task was a mamoth one and I'm sure once you've corrected all the wee mistakes wheel have a good working rule.

 

 

 

 



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Posted By: Major Iyeswater
Date Posted: 07 Mar 07 at 1:19pm
Originally posted by Scooby_simon

Thanks, I'll pass it on, maybe I can get some sleep now...

For the SX and Sport we have all up weights of 192 and 191.5 kg, is one of these wrong ?

What you doing answering these then?  Have you wired the notification of a reply into your alarm clock? If so - A very BAD idea I would suggest.

 

If these are the weights previously supplied by the Association then the will be correct, I know the SX is heavier but not by the exact amount, sorry. I will try to find out if the weights you stated are incorrect and will let you know if this is the case.



Posted By: Scooby_simon
Date Posted: 07 Mar 07 at 1:25pm
Originally posted by catmandoo

when I sailed my sx there was a gap in supply of "whales Dicks " , hadn't gone into production , I sailed with sx jib self tacker etc , but with a graham eeles chute , I had to carry  an extra 2 kgs of lead to bring up to weight of current sx .

 

In the ratings there are no boat details shown as before , does schrs intend to do this , it makes it impossible to tell what varient of a class the rating refers to eg

A class cats , there's a few Bim A's and all must rate differently , weights can differ by 25Kgs , previously schrs only listed the bim 2000 the rest I assume fell under A class .

 

And I'm sure many others too - prindle and Inter being notorious for producing many variations under the same name .

Weldone sailwave in producing your ready calculator so quickly

 

Thanks too to Scooby and team , your task was a mamoth one and I'm sure once you've corrected all the wee mistakes wheel have a good working rule.

 

There is a clickable rating page in developement, this will provide a list of all rating points used to produce a rating. ETA TBC.

 

Yes, A class will rate differently, If you sail an A class, it needs to be measured by an approved measurer who can then issue a measurement cert with a SCHRS number on it.

A class do give handicappers (all) problems as the class rules do not control all items that SCHRS measures.  The A class rules do not control the length of the mast, and so there is no control on (potential) luff length, thus there is no control on the aspect ratio of the sail.

In theory you could build an A class with a 20 meter mast, this WOULD be an A class, but would have a very different SCHRS from a current Flyer (for example); this is why we have included 2 "sample" boats to give an "approximate" rating for an A class.

 

People should also note that the onus in now on US, the owners (or owners representative) to ensure that the boat MEASURES as per the rating you use.  Remember, if someone protests you with regard to your CLAIMED SCHRS rating, I think a protest Ctte may require YOU to PROVE that your boat measures.....

Something to bear in mind if you sail a one-off or loosely controlled boat like an A class.



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Posted By: anewscents
Date Posted: 07 Mar 07 at 1:48pm

Is that how much lighter the Eales snuffer is?  So do all 5.9s weigh the same then before the kit is on it, or are they weighed first?  Or do they assume they all weigh the same, the snuffer has a standard weight and it is this that is corrected?  Can you ask for a lighter kit if our boat is heavier from the start? Just interested!

Also, a big thanks to all those involved, and I am sure calculators and boat details will follow...when time allows.

The A-Class variations should not be a problem though as you are meant to obtain a SCHRS certificate...i think, so i guess that comes down to the policing of this at regattas.  I guess if someone complains their boat is heavier or lighter than the one in the ratings list (did i say lighter!) then it is up to them to produce the certificate...if asked to.



Posted By: English Dave
Date Posted: 07 Mar 07 at 2:21pm

Major

Delighted to hear you have a humble opinion - this will be welcome news to all in the H5.9 CA!

The Hurricane Sport was previously competing off 1.00. How is 0.997 slower?

I think you are right that the other differences are due to roundings to three decimals rather than two. This means that AW/KT's careful calculations to get the SX "just" rounded to 1.01 have been to no avail.

Does this higher precision mean that we now need more sophisticated timing than that offered by "the RO's wife's sister's friend with stopwatch (halfway through third G&T)"?

Was hoping to see the Spitfire take more of a hit. Sadly it's still a bandit!

Unlucky for all the "wide" boats. As if having to spend a fortune on a tilting trailer wasn't enough of a handicap!



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English Dave
http://www.ballyholme.com - Ballyholme Yacht Club

(You'd think I'd be better at it by now)

Hurricane 5.9 SX
RS700


Posted By: Major Iyeswater
Date Posted: 07 Mar 07 at 3:50pm
Originally posted by English Dave

Major

Delighted to hear you have a humble opinion - this will be welcome news to all in the H5.9 CA!

The Hurricane Sport was previously competing off 1.00. How is 0.997 slower?

David as impossible as it sounds that my humble opinion be in error , but that would certainly appear to be the case in this instance. I have been guilty of getting my Hurricane Spinnaker (normal 5.9 jib - 0.99 old SCHRS) and my Hurricane Sport (Tornado jib – 1.00 old SCHRS) confused . Thank you most kindly  for correcting this oversight  and may I reassure all Hurricane 5.9 Association Members that this unfortunate mishap will never be repeated and normal business can be resumed such that they may consider my humble opinion to be 100% correct in all matters just like they did before this little faux pas.



Posted By: English Dave
Date Posted: 07 Mar 07 at 4:25pm

Apology, admission of error?

You imposter!

WHAT HAVE YOU DONE WITH THE REAL MAJOR?



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English Dave
http://www.ballyholme.com - Ballyholme Yacht Club

(You'd think I'd be better at it by now)

Hurricane 5.9 SX
RS700


Posted By: Dermot M
Date Posted: 07 Mar 07 at 4:41pm
Originally posted by English Dave

Was hoping to see the Spitfire take more of a hit. Sadly it's still a bandit!

Well done Simon and committee !

Dave, You'll have to beat me on the water - before you start worrying about handicap



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Dermot
Shadow 075


Posted By: gary145
Date Posted: 07 Mar 07 at 6:28pm
Originally posted by Dermot M

Originally posted by English Dave

Was hoping to see the Spitfire take more of a hit. Sadly it's still a bandit!

Well done Simon and committee !

Dave, You'll have to beat me on the water - before you start worrying about handicap

 

HAHAHAHAHAHAHAHAHAH nice one



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Posted By: SX501
Date Posted: 07 Mar 07 at 8:47pm
i think it is time to sell the sx  loose a few pounds and get a wee spitfire what do you think dermot


Posted By: English Dave
Date Posted: 07 Mar 07 at 10:01pm

Originally posted by SX501

i think it is time to sell the sx  loose a few pounds and get a wee spitfire what do you think dermot

Biddy, you've had that boat for well over six months now. Must be time for a change!

Are you saying it's me or you who needs to lose the weight? Surely not Dermot - there'd be nothing left.

I see Simon O'G has his SX order in. He'll be quick!



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English Dave
http://www.ballyholme.com - Ballyholme Yacht Club

(You'd think I'd be better at it by now)

Hurricane 5.9 SX
RS700


Posted By: Dermot M
Date Posted: 07 Mar 07 at 10:50pm
Originally posted by English Dave

Originally posted by SX501

i think it is time to sell the sx  loose a few pounds and get a wee spitfire what do you think dermot

Are you saying it's me or you who needs to lose the weight? Surely not Dermot - there'd be nothing left.

You should see me after winter has taken it's toll

I see that Pete Mc D in his new Spitfire  is doing the business up there 



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Dermot
Shadow 075


Posted By: SX501
Date Posted: 07 Mar 07 at 11:06pm

Its all fun and games

Dave i was referring to me Never refer to a man about his wait

News travels fast about sog ordering his sx kit happy days another boat to play with no more what if. Dont think he is using it for the euros .

The christmas cake will fall off yea dermot a couple of beers and a sing song is what yea need( dont Buy a hurricane) Still singing it from blesso.

Biddy



Posted By: SX501
Date Posted: 07 Mar 07 at 11:07pm

all i can say is sell check         & nbsp;        WEIGHT not wait



Posted By: Dermot M
Date Posted: 07 Mar 07 at 11:31pm
Originally posted by SX501

all i can say is sell check         & amp; nbsp;        WEIGHT not wait

Biddy, Your a Big Boy  You'd nee a weee Crew as well as a Wee Spitfire. You should stick with the SX and not do  a "Sell Check" or "wait" around until you are light enough for a Spitfire



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Dermot
Shadow 075


Posted By: SX501
Date Posted: 08 Mar 07 at 12:43am

 

smart arse



Posted By: Dermot M
Date Posted: 08 Mar 07 at 8:44am
Originally posted by SX501

 

smart arse

Are you coming to Cork to try  out the new handicap numbers against the As 



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Dermot
Shadow 075


Posted By: SX501
Date Posted: 08 Mar 07 at 9:29am

 

No wont make cork doing best man at a wedding. No any good speaches. I will do all the rest i think brian might be traveling down with his sx

 

Biddy

 



Posted By: 353rob
Date Posted: 08 Mar 07 at 12:52pm
Well lads, I would'ent worry too much about the A' s on the race course (different story in the bar) with our new (sic) SCHRS rating, looking forward to March 2008 updates!


Posted By: sailwave
Date Posted: 09 Mar 07 at 1:41am

We'll be OK Rob, just stick to them heavy high horses.  Are you popping over for the Nats...?

http://www.sailwave.com/stuff/Clip4.jpg - http://www.sailwave.com/stuff/Clip4.jpg

(sorry markp - mucho vodka ).

I think we should all sign in as horses at the nats...  i'm so slow i'll be Eyore or whatever the heck that donkey's name is. Nigel can be Red Rum to go with his sail and his..., and well have to find the fastest race horese in history for Chris F....  google teels me it's Big Racket...   I'm sure there are some crazy Scotch(sic) horses too...

NB: At an attempt at a more seriors note: I have barn space if anybody is interested but you'll have to put up with the wifes cooking...

  'hic



Posted By: 353rob
Date Posted: 09 Mar 07 at 1:44pm
Colin,  I won't be able to make it over for the A Class UK Nationals ( would be nice to see where I'm sitting in the A Class fleet) but I got a big work thing on at that time. Ratings will always provoke a reaction from people, it's just the nature of the beast, In Cork we have 5 A's out racing in the mixed fleet and we race under PY for the club events and race nationally under SCHRS. The national events tend to be much longer races and we just cant make up the distance downwind compared to our upwind performance, plus as the wind strength increases our upwind advantage is eroded and our VMG becomes the same as the F18's. Thats life!


Posted By: Teamvmg
Date Posted: 10 Mar 07 at 12:07pm

Not being a yardstick buff, the only real difference that i can see to the numbers is that we have an extra decimal place to work out. As someone that cant seem to be able to keep track of how many laps we have done on the race course, trying to work out how far ahead of other boats we have got to be, just got trickier!

Anyone care to sumarise the significant changes that have been made, as far as UK cat racing goes?

 



Posted By: Whomper
Date Posted: 12 Apr 07 at 4:54pm
Does anybody know the SCHRS rating for a SL 16, the new ISAF Youth catamaran? It isn't in the rating list.


Posted By: Scooby_simon
Date Posted: 12 Apr 07 at 8:44pm

Originally posted by Whomper

Does anybody know the SCHRS rating for a SL 16, the new ISAF Youth catamaran? It isn't in the rating list.

 

It needs measuring.  Then a rating can be calculated.



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Posted By: 353rob
Date Posted: 03 Dec 07 at 5:08pm
So what happens now?, do we support ISAF and SCHRS or not?



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