Re: Stus-List Singing Rigging

2020-06-20 Thread David Risch via CnC-List
So is it a high sea note...? Sent from my Android. Please forgive typos. Thank you. From: CnC-List on behalf of G Donald Wagner via CnC-List Sent: Saturday, June 20, 2020 6:46:41 PM To: cnc-list@cnc-list.com Cc: G Donald Wagner Subject: Stus-List Singing Rigg

Re: Stus-List Singing Rigging

2016-07-27 Thread Jim Watts via CnC-List
mp;C 39 Erie, PA[image: animated_favicon1] > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Jim > Watts via CnC-List > *Sent:* Tuesday, July 26, 2016 11:16 AM > *To:* 1 CnC List > *Cc:* Jim Watts > *Subject:* Re: Stus-List Singing Rigging > >

Re: Stus-List Singing Rigging

2016-07-27 Thread Bill Coleman via CnC-List
Jim – Have you just tried singing along? . . . Bill Coleman C&C 39 Erie, PAanimated_favicon1 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Jim Watts via CnC-List Sent: Tuesday, July 26, 2016 11:16 AM To: 1 CnC List Cc: Jim Watts Subject: Re: Stus-List Sin

Re: Stus-List Singing Rigging

2016-07-26 Thread Jim Watts via CnC-List
I have been trying to silence our shrouds for years. Loosen, tighten, bind them together, hold them apart...nothing works. I suspect I'm going to have to pull the rig and start over to fix this, just like in our 29-2. Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC On 26 July 2016 at 08:06, D

Re: Stus-List Singing Rigging

2016-07-26 Thread Don Harben via CnC-List
Thank you! This gets lots of tangential rig visuals of wind flow! Don Don Harben Viking 34 Life www.ncyc.ca ___ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. Al

Re: Stus-List Singing Rigging

2016-07-26 Thread David via CnC-List
Ya gotta love it... "lateral sinusoidal force" David F. Risch (401) 419-4650 (cell) > To: cnc-list@cnc-list.com > Date: Tue, 26 Jul 2016 10:26:34 -0400 > Subject: Re: Stus-List Singing Rigging > From: cnc-list@cnc-list.com > CC: colt...@verizon.net > > I happe

Re: Stus-List Singing Rigging

2016-07-26 Thread Bill Coleman via CnC-List
ures or drawings explaining this. Cheers, Bill L >> -Original Message- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Don Wagner via CnC-List Sent: Monday, July 25, 2016 8:08 PM To: cnc-list@cnc-list.com Cc: Don Wagner; Christian Tirtirau Subject: Re: Stus-Lis

Re: Stus-List Singing Rigging

2016-07-25 Thread Bernard Bauman via CnC-List
Is that why they call it "tuning the rigging"? BernieEx C&C 25 #342Shopping for new boat Original message From: Franklin Schenk via CnC-List Date: 07/25/2016 9:09 PM (GMT-05:00) To: cnc-list@cnc-list.com Cc: Franklin Schenk , Christian Tirtirau Subject:

Re: Stus-List Singing Rigging

2016-07-25 Thread Franklin Schenk via CnC-List
I think what is happening is that either a shroud or a stay has hit resonant frequency.  I think that either tightening or loosing it will eliminate the noise.  Resonant frequency is the natural frequency of an object.  This happens to my wife when she gets mad at me and is wound up tight. Frank

Re: Stus-List Singing Rigging

2016-07-25 Thread Charles Nelson via CnC-List
Ahhh the vortices! Only relatively recently were these observed in experiments done on 'bumble bee' flight. IIRC, they were shown to be a significant source of lift for these large bees, without which they either could not fly or certainly not fly as well as they do! Charlie Nelson Water Phanto

Re: Stus-List Singing Rigging

2016-07-25 Thread Don Wagner via CnC-List
This is technically known as "vortex shedding". It's a natural phenomena caused by the air flow around a round cylinder ( the rod or the wire) and occurs at certain wind speeds. At normal speeds, normal flow occurs, and there's no vibration. At certain higher speeds, vortexes develop, and induce

Re: Stus-List Singing Rigging

2016-07-25 Thread Jake Brodersen via CnC-List
Christian, Attaching something to the shrouds that would dampen the vibrations will help. If it is the lower shrouds you might be able to stretch a rubber band around the pair to quiet them down. On a single shroud, a weighty piece of rubber attached to it should help, preferably something strea

Re: Stus-List Singing Rigging

2016-07-25 Thread Joel Aronson via CnC-List
Sometimes even a clothespin on the shroud will prevent the harmonic hum. Joel On Mon, Jul 25, 2016 at 4:19 PM, William Hall via CnC-List < cnc-list@cnc-list.com> wrote: > I had the exact same thing after taking down and putting the mast back > up. The previous owner said that the exact arrangem

Re: Stus-List Singing Rigging

2016-07-25 Thread Pete Shelquist via CnC-List
If you have an adjustable backstay, that's probably the easiest way to change tension in the rig and remove resonance. The hum we get is usually the forestay and this takes care of it nicely. Pete C&C37 Celebration -Original Message- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com

Re: Stus-List Singing Rigging

2016-07-25 Thread William Hall via CnC-List
I had the exact same thing after taking down and putting the mast back up. The previous owner said that the exact arrangement in which the shrouds were attached made the difference. I'm not sure exactly what he meant, but last year we took the rig down to transport via road, and evidently it was pu