Jim, I have a spreadsheet with some good data, I think it includes TRs - see near the top of the page at http://www.ariasails.com/links.html
Chris -----Original Message----- >From: James Huhta <[EMAIL PROTECTED]> >Sent: Jul 7, 2008 9:07 AM >To: [email protected] >Subject: RE: catalina27-talk: Re: Quick Question on Shroud Hook-up Locations > >Good Info......Anyone out there know what he Loos Gauge readings should be for >a Cat 27 Tall Rig? Standing rigging is si important for strutural integrity. >I run with a perhaps too loose a standing rigging; maybe I shouldn't. > >Fair Winds ...... Jim Huhta S/V "SEA 130" Hull 4402 Sturgeon Bay, WI > > > >--- On Sun, 7/6/08, Harvey Rosenberg <[EMAIL PROTECTED]> wrote: > >> From: Harvey Rosenberg <[EMAIL PROTECTED]> >> Subject: RE: catalina27-talk: Re: Quick Question on Shroud Hook-up Locations >> To: [email protected] >> Date: Sunday, July 6, 2008, 3:10 PM >> Hi Phil, >> >> When I read the word "failure" I gulped. I sort >> of understand what you are saying, but what is the solution >> for the C-27 rig. >> >> >> ------ Original Message ------ >> Received: Sun, 06 Jul 2008 03:57:21 PM EDT >> From: "Phil A" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Subject: RE: catalina27-talk: Re: Quick Question on >> Shroud Hook-up Locations >> >> >> >> >> >> >> When you tighten the fore stay, back stay, and upper >> shrouds the mast want to flex out of column, like squeezing >> a flat tooth pick from its ends. Squeeze too much and snap. >> >> >> >> You can see what mast pumping is by squeezing the tooth >> pick slowly (safety glasses please) in a C-Clamp and then >> gently try to move the middle back to straight. It will act >> like an over center spring and want to move to anywhere but >> straight. Without tensioned lowers the mast acts like the >> tooth pick and it wants to be anywhere but straight. Add >> the forces of sailing whether it’s the roll of the waves >> or chop or a sail buffeting and these force at time may >> move the center of the mast column to ward center where it >> doesn’t want to stay so instead of loading up cleanly it >> pumps back and forth. Let the pumping continue and it can >> work harden the aluminum at the flex point leading to >> failure. >> >> >> >> The lowers are there to keep the mast in column, >> although mast tuning for performance may require an >> intentional bow known as pre-bend. Even when pre-bend is >> used the center of the column is restrained from moving >> about so the loads are taken cleanly, without pumping. >> >> >> >> Higher performance rigs start using quickly adjustable >> standing rigging known as various types of running stays >> but each adds to the risk of a demasting, as well as, >> adding to performance. Your local PHRF authority will >> penalize you for the modification, if it is allowed at all. >> Of course it is not allowed at all in one-design racing. The >> factory added adjustable rear lowers (baby stays) to the >> Santana 20 design at some point and these appear were >> accepted by their one-design rules and the change escaped >> PHRF scrutiny but that’s an exception. >> >> >> >> >> >> Phil Agur s/v Wing Tip >> Secretary, Call Sign WCW3485 >> IC27/270A MMSI 366901790 >> www.catalina27.org Vessel Doc# 1039809 >> >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[EMAIL PROTECTED] On Behalf Of >> iicaptbrad >> Sent: Sunday, July 06, 2008 10:42 AM >> To: [email protected] >> Subject: Re: catalina27-talk: Re: Quick Question on >> Shroud Hook-up Locations >> >> >> >> >> Harvey, >> >> >> >> >> >> >> >> I was going to ask a question which you may have >> touched on in your second paragraph. Mast pumping. When >> I'm sitting on my boat at the dock while just a >> moderate breeze blows, the boat occassionally vibrates from >> the rigging. I was wondering if this is normal and if the >> rigging might be too tight or loose or out of adjustment. >> The standing rigging seems tight, all shrouds and stays, >> and the mast stands straight if not for a slight forward >> tilt (not noticable unless you hang a plumb bob). I've >> gazed at the rigging while this vibration is happening on >> several occassions and noticed, I think, the mast vibrating >> fore and aft around the spreaders which leads me to believe >> the lowers are loose, but they are tight like a violin >> string. Is this what you mean by mast pumping? >> >> >> >> >> >> >> >> Brad >> >> >> >> >> >> >> >> >> ----- Original Message ----- >> >> >> >> From: Harvey Rosenberg >> >> >> >> To: [email protected] >> >> >> >> Sent: Saturday, July 05, 2008 7:58 AM >> >> >> >> Subject: [Norton AntiSpam] Re: catalina27-talk: Re: >> Quick Question on Shroud Hook-up Locations >> >> >> >> >> >> >> Hi Andy, >> Who is doing the shrouds? Is it George over at >> Samalot Marine? I can't believe he would do that. He >> must be thinking of Hunter B&R rigs. Our mast is not a >> bendable mast. You can adjust shoud tension and rake, but >> not bending it. It has to stay in column in all four >> directions. The foreward shrouds supports this. Leading it >> aft would put more stress on the leading edge of the mast >> when going upwind. >> >> C-27's are known for their mast pumping at dock >> in high winds and this would certainly aggravate this >> condition. >> >> Take him on a walk over at the South docks and look >> at the other C-27's. . >> >> Where is your boat. I couldn't find it? >> >> Regards Harvey Rosenberg C-27TR #6023, 1985 M-18 >> >> Harvey Rosenberg C-27TR >> >> >> ------ Original Message ------ >> Received: Fri, 04 Jul 2008 08:59:07 PM EDT >> From: [EMAIL PROTECTED] >> To: [email protected] >> Subject: catalina27-talk: Re: Quick Question on >> Shroud Hook-up Locations >> >> >> >> >> >> To List >> >> >> >> I have a quick question. I am having the shrouds >> change on my boat (....along with a great deal of other >> work, Boat fell off its stanchions this past March) and >> while the marina was setting up the new shrouds, he placed >> the lower forward shroud at the same spot as the upper >> shroud. He now had the forward lower and the center upper >> on the same spot where I thought the upper should be alone, >> and the stern lower in the correct spot. I questioned him >> on this and he said that the center was designed to take >> the forward lower shroud and the center shroud and the >> stern lower shroud stands alone. I always though that all >> three had their on spot for hook-up. Am I wrong? The >> marina guy seemed to be sure of his answer and mentioned >> that he has done this hook-up on several Catalina 27's >> before. I hope this explanation makes sense with all the >> upper and lower words used!!! >> >> >> >> Thanks >> >> >> >> Andy >> >> >> >> Slow "MO" tion #6038 >> >> >> >> Nyack, NY >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> the world a better place one message at a >> time. Check out the i'm Talkathon. = >> >> >> >> >> >> >> >> >> >> >> >> >> Gas prices getting you down? Search AOL Autos for >> fuel-efficient used cars. >> >> >> >> >> >> postamble(); > > > >
