Craziest Rigging Idea Ever?

[Jackdaw]

I'm skeptical. Balancing the tone between the sides will only tell you that those two tensions are the same. But the mast could still be bent to one side or another even with equal tensions (at small amounts of deflection the mast likely isn't stiff enough to show a different tension).

3rd time I read this on this thread so jumping in here.

Matching pairs of shrouds are a coupled system. Statically they are ALWAYS in equal tension. Don't believe me? Go try and get them out of equal tension. Only thing you will do is tip your rig! ;^)

 

[EV21]

How about if you hung a known dead weight tension value that you want to achieve from the cable and measured the "note" you get when you pluck the cable. Then, when you re rig you could set tension for your note. Would be interesting to measure the "note value" against a tensiometer to see how close the values track. I think Mark's mention of other items influencing the measurement is no small issue. Would the presence of a spreader act like a fret? Still might make for an interesting activity.

 

[PGIJon]

EV....The problem of the know weight is the weight... Based on the specs here (http://www.defender.com/product3.jsp?path=-1|2078767|2079497&id=108067) see below, to achieve a 15% stretch would require a weight of 1,122.15 pounds... That maybe a bit to heavy for me to lug onto the boat.... However, recording the pitch of a perfectly tuned shroud on ones phone might work..... -Jon

1x19 Stainless Steel Rigging Wire 1/4 Inch

• Type: 316, Size: 1/4" Diameter

• Minimum Breaking Strength: 7,481 lbs

 

[Daveinet]

About the only thing it could be useful for is to tell you that you are in the ballpark for the correct overall tension. It is only going to be a ballpark number though, as other factors that effect the wavelength of a vibration of a particular object. Ask any guitarist who brings his instrument in from outdoors, and tunes it several times until the instrument equalizes to the temperature in the room.

 

[thinwater]

http://www.proportionaltech.com/new_site/index.php?option=com_content&view=article&id=117&Itemid=82

Interesting. A few quick calculations suggest it might be in a usable part of the auditory range. If you could create a fret at the top of the turnbuckle, why not? Might be as accurate as any method. Other methods have large errors too.

 

[PGIJon]

Just a bit more thinking along thinwater's auditory range... I have 2 sets of spreaders.. that would potentially give me 3 different notes.... Are you thinking what I'm thinking.... Louie Louie...... Just have figure how much to heel the boat to cause each spreader to act as a fret.

 

[Tally Ho]

I think it only tells you that matching shrowds on each side are the SAME tension, but not that they are the RIGHT tension.

If you used a Loos to get the right tension, then determine the "pitch" with you tuner, I guess you could then check it is still "in perfect pitch". But you have to first determine what the right pitch is.

And as others have said, could be lots of interference (wind, etc.) that makes things even less imprecise.

Greg

 

[thinwater]

We're all guessing. Someone needs to tension with a gauge, measure the tone, and then match that to a calculation. I'm betting the calculation is more accurate than the gauges, which make assumptions about wire stiffness that aren't always valid.

 

[Mark Maulden]

I'm not guessing. As a musician, i can guarantee a tuner will not resolve the "noise" of a shroud being plucked.....

 

[justsomeguy]

resolve

I like dissonance.

...as a musician.

 

[Mark Maulden]

And i agree..just that tuners do not. And plucking a shroud does not produce consonance..(I actually plucked my outer stay today. Had to do it) where's this thread going?

 

[Ron20324]

I'd think you WANT to use the tuner. I mean, when the wind blows and makes the rigging sing, wouldn't you want it in harmony? Tired, I'm going to bed now.

 

[justsomeguy]

where's this thread going?

Towards Schrodinger's cat, it seems.

 

[jwing]

Matching pairs of shrouds are a coupled system. Statically they are ALWAYS in equal tension. Don't believe me? Go try and get them out of equal tension. Only thing you will do is tip your rig! ;^)

My shrouds get out of equal tension every time I sail. Windward tight; leeward loose. But maybe that's not what you consider a static force situation. OK. Even on the trailer, I doubt that my shrouds are equally tensioned; the backstay on my boat is not centered.

 

[Jackdaw]

My shrouds get out of equal tension every time I sail. Windward tight; leeward loose. But maybe that's not what you consider a static force situation. OK. Even on the trailer, I doubt that my shrouds are equally tensioned; the backstay on my boat is not centered.

Correct.

 

[topcat0399]

As a long time guitar player , I'm thinking that getting your shrouds so tight that they would register on a guitar tuner would result in a rig that is WAYYYY too tight.

Now as far as the keel cable goes - that I can definitely get a note on.

When I hit A 440 I'm smiling. When I hit high C I'm reefing....

 

[jwing]

Correct.

OK. If you loaded one side of your boat so that the port gunwale was closer than the starboard gunwale to the water, then even tied in a slip, the starboard shroud would have more tension than the port shroud. This doesn't matter at all; somehow I've allowed myself to get sucked down the hole of intellectual wanking that is this thread.