karl, knock it off. there ain't not a single thing "logrythmically" (sic)
about a catenary. look the frickin word up before you use it.
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA NNNNNNNNNNNNNNNNNNNNNNNN
NNNNNDDDDDDDDDDDDDDDDDDDDDD frickin understand what it means.
dum cluck, you are karl. as in
dddddddddddddddddddddddddddddduuuuuuuuuuuuuuuuuuuu uuuuuuuuuuuuuuuuuummmmmm
mmmmmmmmmmmmmm.
now, knock it off before you kill someone and go to jail.
this has been explained to *you* in simple enough terms to make *you* a
"reasonable man" under the terms of the law of the land. injure someone and
*****I***** will make absolutely certain you are charged with a felony. As you
deserve to be. just like driving a car drunk.
(Karl dum squat Denninger)
Date: 9/27/2004 10:11 PM Eastern Daylight Time
Message-id: et
In article ,
JAXAshby wrote:
karl, knock it off. next time READ the frickin thread before you respond.
the
thread was about shock loads and some frickin idgit's claim that anchor are
SUPPOSED to drag because otherwise the shock loads (on an all chain rode)
would
break the deck chocks off.
Jaxass, YOU knock it off.
There's nothing wrong with all-chain rode.
You need to pay attention to this thing called caternary. It provides the
snubbing on an all-chain rode, and if the scope is sufficiently long the
load comes on slowly, just as it does on a rode made out of line.
If you actually paid attention to the physics of the matter you would
realize that as the "bow" comes out of the chain the load increases -
logrythmically.
Exactly as it does when you stretch nylon line.
The difference is that chain is HEAVY and the effort required to "straighten
the bow" in it is very significant. This effort is applied gradually - the
load does not appear in a "snap".
In either case if you exceed the snubbing capability you take the full
load against the entire anchor system, and I guarantee you that it is
quite possible to tear out deck hardware with all-nylon rodes.
The 3/4" line that I use for "severe service" (both dock lines and anchoring)
has a breaking test of somewhere around 11,000 lbs. That is approximately
1/4 of the displacement of my vessel; I have no reasonable belief that I
could suspend my vessel by the four corners on the bow and stern cleats
by that line without some piece of the deck or hardware failing.
Note as well that in tests of combination chain/rope rodes it is common to
find post-separation that when the nylon rode parts the chain has been
permanently deformed and welds have begun to come apart, indicating that
the chain was very near the failure point as well.
Most storm anchoring failures that are actually your own fault are either
due to insufficient scope or chafe. But the huge majority of failures in a
storm are caused by something - either another boat or some LARGE piece
of debris - fouling your mooring and causing the pull on your anchor to
no longer be along the seabed floor. Once that happens you're screwed,
no matter what kind of anchor and rode you have.
I have a piling next to my air conditioning condensor at the house that took
a direct hit from a neighbor's dock section during Ivan. It is bent over at
a 45 degree angle. It did its job of protecting my condensor, but if that
section had come loose and hit your anchor rode while your boat was anchored
out it would have either cut if (if nylon) or pulled you loose (irrespective
of WHAT it is) and you'd be screwed.
During Ivan I was at a dock with a passel of lines spider-webbing my boat in
place. Post-storm when I returned to the (safely tied up and undamaged)
vessel my chafe gear on the lines that took the predominant load from the
east winds was severely damaged. For chafe gear I use cut-up fire hose -
arguably the toughest stuff around for that purpose.
Without it the lines on that side of the boat would have almost certainly
failed; the damage to the chafing gear was quite an impressive testament
to the loads taken during the storm.
--
--
Karl Denninger ) Internet Consultant & Kids Rights
Activist
http://www.denninger.net My home on the net - links to everything I do!
http://scubaforum.org Your UNCENSORED place to talk about DIVING!
http://www.spamcuda.net SPAM FREE mailboxes - FREE FOR A
LIMITED TIME!
http://genesis3.blogspot.com Musings Of A Sentient Mind