Talk:J Class (yacht)

Parameters of the J Class

The article on Universal Rule doesn't seem to include mast height as a factor. Instead they have sail area. Also this article doesn't say what the product of the Universal Rule had to be.

J-Class can be considered as a subset of the Universal Rule, as such I think details could be added, amongst which the mast weight of 5,500lb. Nuttyrave (talk) 09:16, 5 February 2009 (UTC)

As an aside, does anyone know whether KZ-1 was a true J-class? The length and sail area seem about right, but the displacement is about one-third of the boats we have listed here Lisiate 23:16, 14 February 2006 (UTC)

No, KZ-1 is not a J-class yacht. She was built to exploit design loopholes in the America's Cup rule. She was not built with any reference to or consideration of the J-Class rule Boatman 15:41, 17 February 2006 (UTC)

What about Shamrock I, which the America's Cup website refers to as J-class? Cbaer 14:57, 8 December 2006 (UTC)

Only Shamrock V was J-class yacht. Shamrocks I to IV were cutters. Radomil talk 19:02, 9 December 2006 (UTC)

-> No. All Shamrocks were cutters, of which only Shamrock V was built to the J-Class rule. 1914 America's Cup defender Resolute was not built to the J-Class rule, but was converted to it in 1930 to make a trial horse for the purpose-built J-Class Enterprise. Bear in mind that the J-Class rule dates back to 1903 but no boat was built to it until 1930.Nuttyrave (talk) 15:20, 6 November 2008 (UTC)

I think the big change in 1930 was that rigging technology permitted the bermuda rig on very tall masts. This mature technology just coincidently appeared with the adoption of the J-Class for the 1930 America's Cup.Nuttyrave (talk) 15:25, 6 November 2008 (UTC)

I suggest original owners should be mentioned GilesW 01:35, 1 September 2007 (UTC)

done Nuttyrave (talk) 09:16, 5 February 2009 (UTC)

boat lines

the J Class book covers the genesis of the class, the original and current rating rules and each of the following boats in their own short chapter. The book starts with a list of the included diagrams, all carefully rendered by François Chevalier. These drawings have an important part to play in the revival of the class:

launch	yacht	designer	lines	sailplan + hull profile		deck layout
1893	Britannia	George Lennox Watson	1893	1931
1893	Valkyrie II	George Lennox Watson	1893	1893
1903	Reliance	Nathanael Greene Herreshoff	1903	1903		1903
1908	Shamrock	William Fife III	1908	1908
1914	Defiance	George Owen	1914	1914
1914	Resolute	Nathanael Greene Herreshoff	1920	1920	1929
1914	Vanitie	William Gardner	1920	1920	1929	1920
1914	Shamrock IV	Charles Ernest Nicholson	1920	1920
1927	Katoura	Starling Burgess	1927	1927		1927
1928	Astra	Charles Ernest Nicholson	1928	1931		1931
1928	Cambria	William Fife III	1928	1928		1928
1929	Candida	Charles Ernest Nicholson	1929	1931		1931
1930	Enterprise	Starling Burgess	1930	1930		1930
1930	Shamrock V	Charles Ernest Nicholson	1930	1930	2000	2000
1930	Weetamoe	Clinton Hoadley Crane	1930	1930		1930
1930	Whirlwind	Lewis Francis Herreshoff	1930	1930		1930
1930	Yankee	Frank Cabot Paine	1930	1930		1930
1930	project	John G. Alden	1930
1933	Velsheda	Charles Ernest Nicholson	1933	1933	1997	1933	1997
1934	Endeavour	Charles Ernest Nicholson	1934	1934	1989	1934	1989
1934	Rainbow	Starling Burgess	1934	1934		1934
1935	project	Frank Cabot Paine	1935
1936	Endeavour II	Charles Ernest Nicholson	1936	1936		1936
1937	77A project	Starling Burgess & Olin Stephens	1937
1937	77B project	Starling Burgess & Olin Stephens	1937
1937	77C Ranger	Starling Burgess & Olin Stephens	1937	1937		1937
1937	77D project	Starling Burgess & Olin Stephens	1937
1937	77E project	Starling Burgess & Olin Stephens	1937
1937	77F project	Starling Burgess & Olin Stephens	1937
1937	uncompleted	Tore Anton Holm	1937

The 23mR White Heather II and the A-class schooner Westward were the only other boats which ever raced with the J-Class. Both boats' lines could be included separately in the upcoming books "Mariette and the Herreshoff schooners" and "The Great Meter Classes", available shortly here. Nuttyrave (talk) 20:39, 15 May 2010 (UTC)

Changes of January 2014

I made some changes and they were immediately reverted for purported "inaccuracies" . I made the changes to make the page more readable and to bring the page into conformance with information found at other pages (specifically the page at Universal Rule). So if what I added was inaccurate, so too is the page on the universal rule as well as the references therein. If you are going to revert purported "inaccuracies" the burden is upon you to list these accuracies. If the accuracies are not burdensome, I suggest correction (you know, actual editing...) rather than wholesale revision to the previous. If the inaccuracies are truly problematic then the burden is upon you, also, to change the other pages that reflect such purported inaccuracies. TreebeardTheEnt (talk) 16:53, 23 January 2014 (UTC)

I support improvements, but why did you add the Skene citation to the rating formula if you were not going to use it, gut the formula, use the 0.2 index which was pre-J-Class and introduce inaccuracies such as a rating of 88ft? The max is 76ft. I had previously worked on the French page, where fellow contributors did a fantastic job. Please read it and advise.. signed:Donan Raven (talk) 20:27, 23 January 2014 (UTC)

I accidentally transposed 88 ft when working from the table of classes at Universal Rule (I-Class max $R$ = 88ft). I have fixed that. A Note that the Universal rule wasn't put in place specifically to create classes, that was sort of the cart after the horse, and perhaps that should be noted here as well. TreebeardTheEnt (talk) 17:35, 24 January 2014 (UTC)

Copyright problem removed

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Conversion to SI

Conversion to SI units needed. 130.233.200.96 (talk) 11:46, 6 June 2023 (UTC)

 Done Done in text. Conversion in tables would be messy. HopsonRoad (talk) 13:09, 6 June 2023 (UTC)