Polymatroid - Revision history

en>Joerg Bader: harmonization of the variables used

2014-06-05T13:55:56Z

harmonization of the variables used

← Older revision		Revision as of 15:55, 5 June 2014
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	The ~~'''Universal Rule''' determined a [[yacht]]~~'s ~~eligibility to race in~~ the ~~[[America's Cup]] from 1914 to 1937. Boats built according to the rule reached their peak in the large [[J-class yacht]]s.~~		The writer is called Irwin Wunder but it's not the most masucline name out there. Managing individuals has been his working day occupation for a while. Her family members life in Minnesota. To collect cash is what her family and her enjoy.<br><br>My web page ... [http://immbooks.com/blogs/post/44599 at home std testing]
	Before 1914, the [[Seawanhaka Corinthian Yacht Club\|Seawanhaka Rule]] was used, and after 1937 smaller boats were desirable, and so the [[International Rule (sailing)\|International Rule]] regained its popularity and became the standard. ~~The 6, 8 and 12 Metre Classes were the most popular and the latter was used~~ for ~~the America's Cup until 1987, the last year the America's Cup was sailed in 12-meter yachts~~.

	~~[[Naval architecture\|Yacht designer]] [[Nathanael Herreshoff]] devised the rule~~ in ~~1903~~. ~~Herreshoff had designed winning America's Cup yachts which fully exploited the Seawanhaka rule, which was based only on a yacht's waterline length~~ and sail area, to create narrow boats with long overhangs. This reached its peak with ''[[Reliance (yacht)\|Reliance]]'', the defender of the 1903 America's Cup, which was described as a "racing freak", suitable only for certain conditions. This prompted Herreshoff to propose a rule which also took into account the displacement of the boat.<~~ref~~>~~[http://www.universalrule.com/index~~.~~php?page=3 universalrule~~.~~com ''History of the Universal Rule of Measurement'']</ref>~~

	~~==Universal Rule formula==~~
	~~Mathematically, the '''Universal Rule''' formula was: <math>R=\frac {0~~.~~2 \cdot L \cdot \sqrt{S}} {\sqrt~~[~~3]{D}}</math><ref>{{cite book\|title=Elements of Yacht Design\|author=Norman L. Skene\|year=1904\|publisher=The Rudder publishing company\|url=~~http://~~books.google~~.com/~~books?id=V8TFHPwbgNgC&pg=PA146\|page=146 \| isbn=978-1-57409-134-2}}</ref>~~

	~~Variables:~~
	*'''L''' - Boat length
	*'''S''' - Sail area
	*'''D''' - Displacement
	*'''R''' - Rating

	The numerator contains a yacht's speed-giving elements, length and sail area, while the retarding quantity of displacement is in the denominator. Also the result will be dimensionally correct; R will be a linear unit of length (such as feet or meters). Sailing craft are thus rated when their <math>R</math> rating falls within a certain range. J-Class boats, for example, are any single masted craft with an <math>R</~~math> between 65 and 76 feet.~~

	~~The listing for single mast boats, namely classes I through S.~~
	*Class I: Rating = 76- 88 feet
	*Class J: Rating = 65 - 76 feet
	*Class K: Rating = 55 - 65 feet
	*Class L: Rating = 46 - 55 feet
	*Class M: Rating = 38 - 46 feet
	*Class N: Rating = 31 - 38 feet
	*Class P: Rating = 25 - 31 feet
	*Class Q: Rating = 20 - 25 feet
	*Class R: Rating = 17- 20 feet
	*Class S: Rating = 0 - 17 feet

	~~There were multi-mast classes too, running Class A to Class H.~~

	~~<references~~/>

	~~{{Yacht handicapping rules}}~~

	~~[[Category:Sailing rules and handicapping]~~]

en>Anonash: Changed the definitions a bit

2013-04-10T22:42:45Z

Changed the definitions a bit

← Older revision		Revision as of 00:42, 11 April 2013
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	~~Hello~~. ~~Allow me introduce~~ the ~~author~~. ~~Her name is Refugia Shryock~~. ~~Bookkeeping is my profession~~. It's ~~not~~ a ~~typical thing but what she likes performing is base leaping~~ and ~~now she is trying~~ to ~~make cash~~ with it. ~~Minnesota is where he~~'s ~~been residing~~ for ~~years~~.<br><br>~~My web blog :~~: [http://~~xrambo~~.com/~~blog~~/~~191590 home std test kit~~]		The '''Universal Rule''' determined a [[yacht]]'s eligibility to race in the [[America's Cup]] from 1914 to 1937. Boats built according to the rule reached their peak in the large [[J-class yacht]]s.
			Before 1914, the [[Seawanhaka Corinthian Yacht Club\|Seawanhaka Rule]] was used, and after 1937 smaller boats were desirable, and so the [[International Rule (sailing)\|International Rule]] regained its popularity and became the standard. The 6, 8 and 12 Metre Classes were the most popular and the latter was used for the America's Cup until 1987, the last year the America's Cup was sailed in 12-meter yachts.

			[[Naval architecture\|Yacht designer]] [[Nathanael Herreshoff]] devised the rule in 1903. Herreshoff had designed winning America's Cup yachts which fully exploited the Seawanhaka rule, which was based only on a yacht's waterline length and sail area, to create narrow boats with long overhangs. This reached its peak with ''[[Reliance (yacht)\|Reliance]]'', the defender of the 1903 America's Cup, which was described as a "racing freak", suitable only for certain conditions. This prompted Herreshoff to propose a rule which also took into account the displacement of the boat.<ref>[http://www.universalrule.com/index.php?page=3 universalrule.com ''History of the Universal Rule of Measurement'']</ref>

			==Universal Rule formula==
			Mathematically, the '''Universal Rule''' formula was: <math>R=\frac {0.2 \cdot L \cdot \sqrt{S}} {\sqrt[3]{D}}</math><ref>{{cite book\|title=Elements of Yacht Design\|author=Norman L. Skene\|year=1904\|publisher=The Rudder publishing company\|url=http://books.google.com/books?id=V8TFHPwbgNgC&pg=PA146\|page=146 \| isbn=978-1-57409-134-2}}</ref>

			Variables:
			*'''L''' - Boat length
			*'''S''' - Sail area
			*'''D''' - Displacement
			*'''R''' - Rating

			The numerator contains a yacht's speed-giving elements, length and sail area, while the retarding quantity of displacement is in the denominator. Also the result will be dimensionally correct; R will be a linear unit of length (such as feet or meters). Sailing craft are thus rated when their <math>R</math> rating falls within a certain range. J-Class boats, for example, are any single masted craft with an <math>R</math> between 65 and 76 feet.

			The listing for single mast boats, namely classes I through S.
			*Class I: Rating = 76- 88 feet
			*Class J: Rating = 65 - 76 feet
			*Class K: Rating = 55 - 65 feet
			*Class L: Rating = 46 - 55 feet
			*Class M: Rating = 38 - 46 feet
			*Class N: Rating = 31 - 38 feet
			*Class P: Rating = 25 - 31 feet
			*Class Q: Rating = 20 - 25 feet
			*Class R: Rating = 17- 20 feet
			*Class S: Rating = 0 - 17 feet

			There were multi-mast classes too, running Class A to Class H.

			<references/>

			{{Yacht handicapping rules}}

			[[Category:Sailing rules and handicapping]]

en>AK456: WP:DPL

2012-07-30T10:12:47Z

WP:DPL

New page

Hello. Allow me introduce the author. Her name is Refugia Shryock. Bookkeeping is my profession. It's not a typical thing but what she likes performing is base leaping and now she is trying to make cash with it. Minnesota is where he's been residing for years.<br><br>My web blog :: [http://xrambo.com/blog/191590 home std test kit]