I it happen to be a resonant vibration, try altering the harmonic frequency of a shroud by hanging a radar reflector on it or something like that. Keep playing with shroud tension too.
Kevin M. Morton S/V Serenity _/)_ --- On Mon, 7/7/08, michael mcvey <[EMAIL PROTECTED]> wrote: > From: michael mcvey <[EMAIL PROTECTED]> > Subject: RE: catalina27-talk: Re: Quick Question on Shroud Hook-up Locations > To: [email protected] > Date: Monday, July 7, 2008, 12:02 AM > I have not figured what causes the vibration but mine had it > too I tried different tensions on the shrouds but this did > not stop the vibration if you figure it out let me know. > > From: [EMAIL PROTECTED] > To: [email protected] > Subject: Re: catalina27-talk: Re: Quick Question on Shroud > Hook-up Locations > Date: Sun, 6 Jul 2008 10:41:57 -0700 > > > > > > > > > > > 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. > > > > > > _________________________________________________________________ > Need to know now? Get instant answers with Windows Live > Messenger. > http://www.windowslive.com/messenger/connect_your_way.html?ocid=TXT_TAGLM_WL_messenger_072008
