Yet another topic where jaxie can show his ignorance. NE Ropes says at 15% of
breaking strength elongation is 15%. Marlow has similar numbers. But what would
they know?
http://www.neropes.com/techdata/3strand.pdf

One can debate whether 15% of tensile strength is a proper safety factor, but for a
snubber its not that critical. This works out to snubbers in the range of 30 to 60
feet. Personally, the need to rig snubbers was one of the issues that led me to stop
using all-chain and go to a mixed chain/nylon rode.


"JAXAshby" wrote in message
...
ten foot of stretch on standard twisted nylon is about 150' to 250' of nylon,
except under line breaking conditions.

From: "Jeff Morris"
Date: 11/7/2004 4:55 PM Eastern Standard Time
Message-id:

Even more important than the "droop" is the limited (almost non-existent)
extension
available to an all chain system. What its really needed is enough nylon to
allow for
5 or 10 feet, or more, of stretch.



"Jim Donohue" wrote in message
news:rUtjd.90348$bk1.52418@fed1read05...

"Amgine" wrote in message
om...
"Jim Donohue" wrote in message
news:X2Uid.82404$bk1.80735@fed1read05...
The problems is
that above 35 knots of wind or so you have a straight rode.

Uhm, maybe for your boat. In fact, just last weekend I was anchored
out in 30 gusting 45 and neither chain+rope rode was bar-taut. On the
other hand, I was wishing I had a bit more chain on both because I
didn't have quite enough out for the weather (7:1 on a 7.5kg Bruce,
and 5:1 on a 25lb. CQR) as I'd anchored 8 hours before the peak of the
blow.

To get a reasonable amount of shock absorption with all-chain, use a
chain hook on about 30-40' of light nylon laid line and veer out a few
more feet of chain. You'll get all the spring you want, but if there's
much fetch you don't want too slack a chain to save your bows from a
beating.

I've never used either a kellet or buoy, but I'd like to experiment
with both. Who has used which?

Amgine
http://wiki.saewyc.net/

See Complete Book of Anchoring and Mooring by Hinz page 113. On the ABYC
hypothetical power boat of 45 feet and 15 foot beam the cantenary has 1
foot of
"droop"per 100 feet of rode at 30 knots and 0 feet at 40 knots. If your
boat is
smaller and has a smaller section it may be a little higher.

Hinz advocates the use of chain riding stoppers for all chain boats. He
points out
that all chain rodes are very good at parting or destroying something in
high winds.
They are also sufficiently noisey in high wind conditions to make sleep
difficult.

Jim Donohue