handicap system
Printed From: Yachts and Yachting Online
Category: General
Forum Name: Racing Rules
Forum Discription: Discuss the rules and your interpretations here
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=11859
Printed Date: 09 Aug 25 at 8:40am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: handicap system
Posted By: Eminoxon
Subject: handicap system
Date Posted: 18 Jan 15 at 5:55pm
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I am trying to work out how much time ahead my friends son needs to be in a tera pro to still beat my daughter in a tera sport (or rather the other way round! how far behind can she be and still beat him!) Is this comparable to the persuit timings? the rya persuit timings give the sport a 4 minute head start over 60 mins, our races vary between 45 mins and and hour, so for a 45 min race this would seem to mean she has 3 mins of time to cross the line and be first. However when looking at the race results this doesnt seem to be the case. any Ideas? would be good if she (and he) had a rough idea. Thanks
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Newtothis
RS feva 4624, share Rs200 1317, daughters RS tera 798 rs aero 1301
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Replies:
Posted By: JimC
Date Posted: 18 Jan 15 at 6:15pm
Well, it also depends on what handicaps your club is using. But lets go with current published, which I think is 1351 and 1451.
If we start with 1 minutes sailing for the tera pro, that's 60 seconds. 60/1351 (Tera Pro handicap) *1000 = 44.4 seconds corrected time.
Now lets take 44.4 * 1451 (Tera Sport handicap) /1000 = 64.4, which gives us the elapsed time needed for the Tera sport to tie with the Tera pro.
So if the Pro sails for 45 minutes (45 * 44.4) it will have a corrected time of 1998 seconds.
And if the Sport sails for 2900 seconds it will also have a corrected time of 1998 seconds. 2900 secs is 48 minutes 20 seconds. So if the Pro sails exactly 45 minutes the Sport wins if its less than 3 minutes 20 secs behind.
Personally I always abjectly fail to do these sums in my head, and never manage to record what time the other boat finishes anyway, so have to wait for the results!
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Posted By: Eminoxon
Date Posted: 18 Jan 15 at 6:25pm
Thanks JimC, yes we are using the standard py values. The boy came in first overall (!)on paper today but they had him down as being in a sport rig so the results need to be well adjusted. I guess his corrected time will be significantly different. All good fun. The club are going to hate it when I get my new aero, Im sure there will be lots of arguments about PY values then, especially by the laser sailors!
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Newtothis
RS feva 4624, share Rs200 1317, daughters RS tera 798 rs aero 1301
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Posted By: JimC
Date Posted: 18 Jan 15 at 6:56pm
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All these very similar looking but very different performance boats are a right royal pain for the average once a year club race office to sort out and identify correctly, which in turn means that they are a right royal pain for trying to work out handicaps.
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Posted By: Eminoxon
Date Posted: 18 Jan 15 at 8:35pm
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they know he is in a pro, its just our old system doesnt have the pro on it. we are in the process of moving to sailwave and are currently doing both systems, so when it grts upladed onto the web it will be sorted out as the sailwave system has the pro rig on it.
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Newtothis
RS feva 4624, share Rs200 1317, daughters RS tera 798 rs aero 1301
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Posted By: fab100
Date Posted: 19 Jan 15 at 5:24am
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Does it have to be that complicated Jim?
I went for 45 mins times 1451/1351 which came to 48.33 mins, so 48mins 20 seconds. Same answer, easier sums.
For an hour, 60 mins times 1451/1351, giving 4 mins 26 secs
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http://clubsailor.co.uk/wp/club-sailor-from-back-to-front/" rel="nofollow - Great book for Club Sailors here
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Posted By: Rupert
Date Posted: 19 Jan 15 at 12:32pm
Or, as a rough guess on the water, 1 minute per 20 points of handicap per hour - important for the 2nd boat, as they are going to be far too busy sailing to do maths, but might manage to glance at their watch when they hear the hoot for the faster boat, but by my experience, won't really see what the seconds are doing anyway, just the minutes, without losing concentration. The boat that has finished can do the maths while waiting...
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Posted By: Eminoxon
Date Posted: 27 Mar 16 at 8:01pm
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ok this was all great and very useful, but today the time sailed was 43 mins by the sport and 41.5 mins by the pro, so the difference was only 1.5mins. the numbers were entered into sailwave and it spat out that he beat her....surely not?
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Newtothis
RS feva 4624, share Rs200 1317, daughters RS tera 798 rs aero 1301
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