Talk:Spinnaker

message: I'm not quite sure how to rewrite this page. The spinnaker is more than a bag of wind. It conforms to exactly the same laws of aerodynamics as other sails do! But what is currently in the article is a common misconception. Andrewa 21:31, 12 Nov 2004 (UTC)
thread_title: Comments

message: The discussion of broaching is misleading.  Broaching is not uncommon with asymmetrical spinnakers, and the wind never comes from the opposite side of the sail.  It is true that it's nearly a capsize. - Bob S.--68.192.140.211 23:05, 1 Jan 2005 (UTC)
replies: text: Anyone have any input on how to rework that?  Never having sailed with a spinnaker, I'm working entirely with secondhand knowledge here...  scot 22:06, 8 September 2005 (UTC)

text: As someone who has done a lot of broaching, I think it needs a page of its own. I will write one. Malcolm Morley 09:22, 10 September 2005 (UTC)

text: I have revised the section on broaching, based on wide dinghy & keelboat racing experience & Marchaj, further suggestions & expert input welcome. GilesW 11:02, 2 September 2007 (UTC)
thread_title:  Broaching 

message: Asymmetric spinnakers have been around much longer than mentioned. 18 foot skiffs may have been the first. Certainly they had them as early as 1987.
:I'll look into that and see what I can find.  It may be hard to pin down, as highly cambered genoas (gennakers) tend to look a lot like asymmetric spinnakers, the only definitive difference (as far as I can see) being whether or not they're attached to the forestay.  scot 22:06, 8 September 2005 (UTC)
replies: text: Here's a promising link:  http://www.monmouth.com/~nsnj/demystasym.htm  It seems to be a bit fuzzy to me on the descriptions of the sails--is a sail with a wire luff, for example, considered an asymmetric spinnaker, or a gennaker?  I'll keep looking... scot 02:02, 9 September 2005 (UTC)

text: https://www.setsail.com/c_central/sail_advice/sail_advice.html#fourinone More nomenclature to confuse the issue more... scot 02:12, 9 September 2005 (UTC)

text: Invented by Julian Bethwaite and used on his B18 .  GilesW 00:13, 1 September 2007 (UTC)
thread_title:  History of asymmetrics 

message: Proposed revision. Sheets and guys were mixed up, and other changes to make it more general. 
Like the symmetric, the asymmetric may be stored in a turtle etc, or use a spinnaker chute.  Unlike the symmetric, asymmetrics have the tack attached to the bow or a bowsprit (often retractable), and have two sheets attached to the clew like a jib.  The head of the sail is attached to the spinnaker halyard, which is used to raise the sail.  The sheets are passed to ahead of the forestay; they may be passed outside the tack of the asymmetric, or between the tack and the forestay.  The leeward sheet is used to set the sail, and the opposite sheet is left slack. 
Not sure about this sentence, please explain why tack needs to slide up and down. Deletion proposed.  
Often a tack line is used at leading edge to provide adjustable tension on the luff of the spinnaker, or it may be attached to the forestay with a sliding collar (often riding over the furled jib on parrel beads or similar device) allowing the tack to slide up and down.
Jibing with the asymmetric is less complex than the symmetric, due to the lack of the spinnaker pole.  Much like a jib, it is necessary to release the 'old' sheet and pull in the 'new' one, though as it has to travel round the forestay, it has much further to travel.  Asymmetric spinnakers require boats to tack down wind, and fast boats may be travelling close to (if not faster than) the speed of the true wind on entering the jibe, so that there is little apparent wind during a correctly performed gybe, facilitating the manoeuver. 
Depending on the configuration of the spinnaker system, retrieving the asymmetric is similar to the symmetric, though the detailed choreography may be quite different. So as not to drop the spinnaker into the water, the procedure involves coordinating the sheet with the lowering of the spinnaker into the spinnaker chute (if applicable), and retracting the bowsprit (if applicable), while steering and balancing the boat. GilesW 00:41, 1 September 2007 (UTC)
replies: text: A couple of comments.  First, for examples of rigging the asymmetric over a furled jib with parrel beads or a sliding collar, see the examples given in  this discussion (I should stick one of those in as a reference).   scot 21:29, 4 September 2007 (UTC)
replies: text:  OK. I was not familiar with cruising chutes & their use of parrel beads. Perhaps this should go in a cruising chute paragraph to avoid confusion, as they do not apply to bowsprit flown asymmetrics. GilesW 22:41, 9 September 2007 (UTC)
replies: text: I put in a mention of retracting bowsprits used on racing boats along with a link to a webpage with a good illustration.  I'm not sure it's worth splitting into cruising and racing sections at this point.  scot 13:56, 10 September 2007 (UTC)

text: Next, I'm not sure that "spinnaker chute" is worthy of a separate article; why not a section in this article that covers the spinnaker chute, socks, and turtles?  I've got an old ATN asymmetric and a sock that I should be able to get a shot of; I need to dry-rig the Mac21 and get everything fit at some point, and I can get some shots of the sock then.  The spinnaker chute is probably worth a diagram.  scot 21:29, 4 September 2007 (UTC)
replies: text:  I made it a separate article for ease of cross reference from descriptions of classes that incorporate or permit spi chutes. Also several arrangements are common and should be illustrated, e.g. through-hull (sealed tube), sock, and open arrangements. If the expanded article would fit well in the Spinnaker article by all means move it, with redirection to that paragraph for ease of cross reference. GilesW 22:41, 9 September 2007 (UTC)

text: Moved as suggested by scot. GilesW 17:44, 12 September 2007 (UTC)
thread_title: Rigging the asymmetric spinnaker

message: Running spinnakers work more efficiently when unstalled, so that the air flows transversely from luff to leach, which generates more lift from the spinnaker and also produces transverse airflow behind the mainsail, clearing away the vortex from behind the mainsail, increasing its drive. Thus modern running spinnakers are designed to deflect the airflow by about 90 deg and so are not "almost hemispherical" as stated - even though they may look it from some angles. Spinnakers are generally best flown with the luff regularly curling inwards slightly - if not they will probably be stalled and loose power. Attentive spinnaker trimming wins races, and is as important running as reaching. GilesW 18:08, 12 September 2007 (UTC)
thread_title: Running Spinnakers

message: Nothing here on the history of the spinnaker itself - Sphinx's Acre etc etc. Room for a brief history I think? Merrythought 12:45, 16 October 2007 (UTC)
replies: text: Ditto. Personally I'm most interested in the late 19th Century development and experiment and the effect that improving materials, the move from sail cloth to synthetics, had on the design and performance, and how the application of aerodynamics to the design process influenced size and shape.
I've tried to find the logbooks of the USS Constitution online, but they are not available. I can confirm that the 13th of july 1812 was a monday, and that John Thomas Shubrick was promoted to Lieutenant on the 20th of may that year (https://www.findagrave.com/memorial/89517522/john-templer-shubrick), but I cannot find this archive online. I don't know how to see who added this section, 'cos newb, but maybe they can add some clarity on how they got this information.  — Preceding unsigned comment added by BaoluoShifu (talk • contribs) 03:33, 24 September 2019 (UTC)
thread_title:  History of the spinnaker 

message: :"While a fully equipped racing boat might have a number of spinnakers, both symmetric and asymmetric, to cover all courses and wind conditions, cruising boats almost always use an asymmetric, due to the broader application and easier handling afforded by the asymmetric."
In my experience cruising boats invariably tend to have symmetric 'chutes.  Mind all the boats I've sailed on are considered pretty old these days.
:- HighlyErratic 21:43, 15 February 2009 (UTC)
thread_title: cruising

message: Hi all, I have added a short section on Cruising Chutes.  Seemed a huge gap in the article.  Happy to go with the BRD cycle of course if have trodden on any toes, but I am on a wikibreak for a couple of weeks or so so if I don't join in it's not that I am offended hahaha!.  Regards,  Springnuts (talk) 22:06, 22 August 2010 (UTC)
thread_title:  Cruising Chutes