With hurri%$#& season upon us, I thought someone might find this link
useful.

http://www.hsarmor.com/htm/chafeprice.htm

http://www.hsarmor.com/images/fkpindex.jpg

Purchased some product from them, and was satisfied with the service
and the quality of the product. I will definitely rest a little easier
during a storm. Just hope the guy upwind doesn't have his "insurance"
anchor/rode out.

I have no financial stake in this company at all.

Mike.

Well, to be fair,

These don't keep water out, they just sheath the line. In "bad
conditions" (tropical storm/hurricanes), horizontal, wind driven rain
will find it's way into every crevice, unless it is purposely and
perfectly sealed.

This chafe protection doesn't prevent the line from being soaked during
these kinds of conditions.

You are right though in your statement that the nylon line will do much
better if wet.

Mike.


Charlie Morgan wrote:
On 29 Jul 2006 05:46:48 -0700, "beaufortnc" wrote:

With hurri%$#& season upon us, I thought someone might find this link
useful.

http://www.hsarmor.com/htm/chafeprice.htm

http://www.hsarmor.com/images/fkpindex.jpg

Purchased some product from them, and was satisfied with the service
and the quality of the product. I will definitely rest a little easier
during a storm. Just hope the guy upwind doesn't have his "insurance"
anchor/rode out.

I have no financial stake in this company at all.

Mike.

Although it would probably be good for natural fiber lines, I think it might
actually contribute to failure of nylon lines in bad conditions. Nylon lines
depend on water for lubrication as they stretch and contract. If you cover them
with something that keeps water out, the individual nylon fibers work against
each other and the friction gets them hot enough to melt and break. That's why
lengths of old garden hose are also a bad idea. Nylon requires water.

For everyday chafe protection in mild conditions this wouldn't be as much of a
problem. When things get rough, however, it's a very different story.

CWM

Charlie Morgan wrote:
On 29 Jul 2006 05:46:48 -0700, "beaufortnc" wrote:

Although it would probably be good for natural fiber lines, I think it might
actually contribute to failure of nylon lines in bad conditions. Nylon lines
depend on water for lubrication as they stretch and contract. If you cover them
with something that keeps water out, the individual nylon fibers work against
each other and the friction gets them hot enough to melt and break. That's why
lengths of old garden hose are also a bad idea. Nylon requires water.

For everyday chafe protection in mild conditions this wouldn't be as much of a
problem. When things get rough, however, it's a very different story.


Have you ever personally seen a nylon line used for berthing or mooring
actually get hot enough by this mechanism to melt or break?

-paul

Well, the OP was referring to a storm anchor, so I would think it to be
relevannt. For out-of-the -ordinary circumstances, I would accept lab
results.

"Paul Cassel" wrote in message
. ..
Charlie Morgan wrote:
On 29 Jul 2006 05:46:48 -0700, "beaufortnc"
wrote:

Although it would probably be good for natural fiber lines, I think it
might
actually contribute to failure of nylon lines in bad conditions. Nylon
lines
depend on water for lubrication as they stretch and contract. If you
cover them
with something that keeps water out, the individual nylon fibers work
against
each other and the friction gets them hot enough to melt and break.
That's why
lengths of old garden hose are also a bad idea. Nylon requires water.

For everyday chafe protection in mild conditions this wouldn't be as much
of a
problem. When things get rough, however, it's a very different story.


Have you ever personally seen a nylon line used for berthing or mooring
actually get hot enough by this mechanism to melt or break?

-paul

"Charlie Morgan" wrote in message
...

Although it would probably be good for natural fiber lines, I
think it might
actually contribute to failure of nylon lines in bad conditions.
Nylon lines
depend on water for lubrication as they stretch and contract. If
you cover them
with something that keeps water out, the individual nylon fibers
work against
each other and the friction gets them hot enough to melt and
break. That's why
lengths of old garden hose are also a bad idea. Nylon requires
water.

For everyday chafe protection in mild conditions this wouldn't
be as much of a
problem. When things get rough, however, it's a very different
story.

OK, friction creates heat, lubrication reduces friction. I've
noted that wetting the line where it passes through the fairlead
stops it squeaking.

However, internal friction within a line is trivial compared to
the external friction created by chafe, which is highly localised.
A hardened area where a nylon line passes through a fairlead is
common. A low friction sleeve, or a thick sleeve which has
elasticity, will prevent this occurring.

My favourites are irrigation hose (PTFE, low friction, good for
faileads) or thick soft plastic hose (high friction, but loads of
elasticity, good for eyes around bollards). Both these have to be
threaded onto the line before use. The advertised product can be
added later - seems to be a good idea.

My testing ground is Kalamata marina, which suffers a couple of
times each winter from heavy surge for a day or three. One session
of about 20 hours, heavy rain, took one of the pair of bow lines
(nylon) beyond its stretch recovery point (all the long term berth
yachts had a further pair of back up lines . . .). Neither line
melted or broke. Mine didn't chafe through - though some (without
protection) did.

My damage points (apart from the lengthened rope!) were the
bowline knot nips (which made the loops which went around the
bollards). They were hardened. I now use eye splices.

I think a lengthened rope (20mm diameter for a 12m yacht) is a
good indicator that stresses were high, and 20 hours is a long
time to withstand a 5 second cycle of stresses. I'd define that as
rough. So from this experience I find it difficult to believe that
anti chafe sleeves may contribute to line damage.
--
JimB
http://www.jimbaerselman.f2s.com/
Describing some Greek and Spanish cruising areas

Have you ever personally seen a nylon line used for berthing or mooring
actually get hot enough by this mechanism to melt or break?

http://www.boatus.com/Hurricanes/line.asp

OK, friction creates heat, lubrication reduces friction. I've
noted that wetting the line where it passes through the fairlead
stops it squeaking.

Water carries away the heat, while also helping to reduce the friction.

Have you ever personally seen a nylon line used for berthing or mooring
actually get hot enough by this mechanism to melt or break?


Bill Kearney wrote:
http://www.boatus.com/Hurricanes/line.asp

That's just what I was going to say.

I have not seen lines that broke due to this, but I have
replaced lines that seemed to have little needle-like
hardened strands in them. That Boat US article was a very
good explanation and seemed very plausible to me (after
having seen partly melted strands in rope).

Fresh Breezes- Doug King

In article ,
says...


OK, friction creates heat, lubrication reduces friction. I've
noted that wetting the line where it passes through the fairlead
stops it squeaking.

Water carries away the heat, while also helping to reduce the friction.

My owner (wife) makes excellent leather chafing gear out of soft old
boots, jackets, skirts, etc. Works great and certainly does not keep the
water off the line.