Allocating PY Numbers
Printed From: Yachts and Yachting Online
Category: General
Forum Name: Race Management
Forum Discription: For race officers and competiors to discuss the topic
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=3030
Printed Date: 27 Jun 25 at 2:54am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Allocating PY Numbers
Posted By: Paul Wells
Subject: Allocating PY Numbers
Date Posted: 01 Jun 07 at 11:14am
Should race management teams stick to recomended RYA PY's for boats for
which they have no previous data at their club?
For example, should a boat with a 3 blade fixed prop be given the 2%
allowance suggested by the RYA over a boat of the same design (but not a
strict one design) or be forced to give time to the boat with the 2 bladed
prop to make working out the results easier for therace control?
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I work to sail!
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Replies:
Posted By: craiggo
Date Posted: 01 Jun 07 at 5:59pm
Paul,
I've had similar thoughts on this one for a while now, but since I found the Byron system, I have just insisted that members get a Byron number. http://byronsoftware.org
Simply get your members to fill in all the details and they will be sent back a number for their boat FREE. The system uses a bit of maths and the primary PY numbers to determine the numbers for a given set of measurements.
Over the winter I trialled both the Byron numbers against PY including following the RYA specimen race methods and by the end of the series the numbers I had were pretty much the same as the Byron numbers.
Pretty much all of the cruiser racing clubs on the Bristol Channel are now using Byron.
Give it a go !
Paul
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Posted By: Paul Wells
Date Posted: 04 Jun 07 at 1:16pm
Hi Craiggo
Thanks for that will take a look.
Paul
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I work to sail!
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