The vang is still needed, where need is a rather strong word for cruisers, to control the sail twist when on a beam reach to running.
See http://www.sailingusa.info/sail_shape.htm and search for the word "twist." John Lance Jones wrote: > I have a theoretical question. I have a loose footed main. With that in > mind and knowing that the sail only contacts the boom in two locations, > does the vang serve any purpose? I can tighten the luff with the > Cunningham and the foot with the outhaul. > > Lance Jones > Cruising Captain, Barefoot Sailing Club > Catalina 27TR SN 5455 Gaelforce! > Capri 25 SN 411 Scottish Rebel! (AKA InstiGATOR) > > ----- Original Message ----- > *From:* Rudolph S. Behar <mailto:[EMAIL PROTECTED]> > *To:* [email protected] > <mailto:[email protected]> > *Sent:* Thursday, June 21, 2007 5:43 AM > *Subject:* Re: catalina27-talk: Stay tension > > Mike, > > Here they are, hopefully accurate this time. Last time I goofed the > recopying. Of course, Loos Gauge Model A is used for the 5/32nds > lowers, and Model B for the uppers and forsestay and back stay. > > Uppers: Loos B 640 > Aft lowers Loos A 350 > Forward Lowers A 350 > > Forestay Loos B 440 with backstay adjuster off. 750 with adjuster > full on. > > Backstay with adjuster off Loos B 380 > > These are markedly tighter than the mean of the figures for the four > boats, but still well under the highest settings used by one of the > boats. These settings give me no sag in 20 kt and, if I remember > correctly, in even more. > > Depends on what wants, I guess. John's setting is very loose, and > his is the boat to beat in our races. But some, as is obvious, > prefer a tight rig. > > The forestay and backstay settings are experimentally arrived at, > and from measuring a couple of local boats: > > I'm told that these figures vary according to what different > sailmakers recommend. > > I have the gauges and will be glad to go to any local boat that > wants to use them. > > Rudy B. > Phoenix, #2237 > Pasadena, MD > > > > Michael Munn wrote: >> Rudy, >> >> I'd like to see your revised numbers. >> >> Thanks for offering. >> >> Mike >> Katie Bay-B >> Benicia, CA >> >> */"Rudolph S. Behar" <[EMAIL PROTECTED]>/* wrote: >> >> All, >> >> I recived this scale from this source a couple of years ago >> and used the median settings on my boat. They were >> satisfactory up to 15 knots and then started to show lee >> shroud sag. I pumped up the tension to where I showed no sag >> beating in 20Kt(whitecaps all over), but I don't remember the >> setting as I am here at the computer. It's on the boat. I'll >> get it if anyone wants it. >> >> And, yes, I promised photos of my cabin trunk gear in place. >> Today. >> >> Rudy B. >> >> Chris Maddox wrote: >>> Also at http://www.ariasails.com/c27rigtension.xls Chris >>> -----Original Message----- >>>> From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Sent: Jun 20, 2007 >>>> 10:22 AM To: [email protected] Subject: Re: >>>> catalina27-talk: Stay tension Try this link for the spreadsheet, also >>>> in html format http://users.vnet.net/nliner/c27/docs.html >>>> ---------Included Message---------- >>>>> Date: >>>>> 20-Jun-2007 09:18:40 -0400 From: "Lance Jones" <[EMAIL >>>>> PROTECTED]> Reply-To: <[email protected]> To: >>>>> <[email protected]> Subject: Re: catalina27-talk: Stay >>>>> tension Thanks, however, there was no attachment. Lance Jones >>>>> Cruising Captain, Barefoot Sailing Club Catalina 27TR SN 5455 Gaelforce! >>>>> Capri 25 SN 411 Scottish Rebel! (AKA InstiGATOR) ----- Original >>>>> Message ----- From: [EMAIL PROTECTED] To: >>>>> [email protected] Sent: Tuesday, June 19, 2007 11:51 PM >>>>> Subject: Re: catalina27-talk: Stay tension >>>>> Lance - I am pretty sure that was put together by Carl >>>>> Schaefer a few >>>> years back and ALL the boats on that list are racing boats and >>>> they require mast rake from the adjustable backstay. >>>>> I am very surprised that Hi Tide's tensions are as high as >>>>> shown. Please set up your boats (I assume by your title that you are >>>>> >>>> setting the boats up to cruise) tighter than the attached. >>>>> Chris D toy box eastport, md >>>>> ------------------------------------------------------------------------------ >>>>> See what's free at AOL.com. >>>> ---------End of Included Message---------- -- ~~| >>>> /|\ Neil Liner / ||\ 1984 Catalina 27 TR >>>> / C|| \ "Air Transit" / 27|| \ #5711 / || \ >>>> >>>> Cornelius, NC / 5711|| \ http://users.vnet.net/nliner >>>> /______||_____) [EMAIL PROTECTED] >>>> ~~~(_____________/~~~~~~~~~~~~~~~~~~~~ // /__/ >>> >> >>
