BoatBanter.com - View Single Post - HR 2550 may make it illegal to wash your deck

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On Tue, 18 Sep 2007 10:19:03 GMT, (Richard
Casady) wrote:

On Mon, 17 Sep 2007 22:36:37 -0500, "KLC Lewis"
wrote:

"Brian Whatcott" wrote in message
. ..
On Tue, 18 Sep 2007 07:31:15 +0700, wrote:

Most rigging would shrink more in Winter (but a few would expand when
chilled, wouldn'tcha know?)

Brian W

Well, if you are designing a high tech racing boat why not use high
tech synthetic rope for rigging. some of it is stronger then stainless
cable and nearly zero stretch.

Bruce in Bangkok
(brucepaigeATgmailDOTcom)

I can visualize various combinations of rig and mast , it's true. But
a zero-stretch line does not always imply a zero thermal coefficient
line, I don't believe.

Regards

Brian W

There is a new rigging material out which is exactly that: high-tech
synthetic rope with a protective covering. Don't recall the name of it, but
it's very lightweight and exceptionally strong. At least in theory. Jury's
still out on how it works in the real world.

Take a look at the pendulum of a grandfather clock. They cleverly
arrange brass and steel so that the assembly has a zero temperature
coefficient. If the rigging stays the same length while the aluminum
mast increases in length, the rig will get tighter. Not what you want.

Casady

True, but in real life how many cruising boats have their rigging
tension to the maximum. Most of them have the rig tight enough that
the leeward stays aren't rattling around and that is about it.

Bruce in Bangkok
(brucepaigeATgmailDOTcom)