| .
|
At Marlow, we know what our
ropes will do. How well they can be expected to perform. How long they are
likely to last and under what conditions. That`s our business. The fact
remains that the best ropes in the world deserve to be well looked-after
in order to preserve their reliability, durability and
performance.

| Coiling and
Uncoiling |
This is not always as simple as it
sounds. Pulling wrongly from a coil can cause kinks (where one strand
turns over into a tight loop and stands out like a vein) much reducing the
strength of the rope. The answer is to coax out the kink before any damage
is done. |
| Nipping |
A sharp bend is something to avoid.
It means that only about half of the rope`s fibre are taking the load (the
remaining fibres being rendered ineffective by compression. This in turn
puts undue strain on the remaining fibres. |
| Wear |
There is no problem in storing
modern synthetic ropes in a wet state. The risk of deterioration is
minimal. The real risk is if they remain in the same position for long
periods of use. If signs of wear are there to see, the rope can be
reversed one end to the other in order to spread the wear. Alternatively,
use slightly longer ropes than needed in the first place and periodically
move the bearing position a few inches. The furry look of a well used
synthetic rope may indicate a slight strength loss however the hairy
surface helps to protect the rope against further abrasion. If the rope
shows excessive wear ie. A plaited cover worn right though, the rope will
need to be replaced or repaired. |
| Abrasion |
Something to watch for with every
rope. Seeing the blocks, cleats and fairleads allow the rope to pass
freely minimises the risk, although many problems are often due to using
the wrong size of ropes for the fitting. Ratchets and stoppers are
particularly hard on the outer surface of ropes. Only regular inspection
will keep you out of trouble. Seized blocks and swivels
quickly spell ruin to ropes. |
| Heat
Damage |
Friction can cause strands to melt
both externally and internally. But as the melting point of most ropes is
between 130°-260°C the risk of real damage is slight. If you think a rope has
overloaded, open the strands to check for heat damage (fusing of strands).
|
| Splicing |
A correctly spliced rope has between
90-95% of the strength of the unspliced rope. Regular inspection of
splices makes sense, particularly in such a case as, for example, a
plaited rope splice where new fibres sometimes appear at the neck. If the
rope eye appears to be moving and showing clean rope, have a word with a
professional rigging. |
| End of
Season |
Salt crystals will affect the life
and efficiency of ropes so, at the end of each season, soak them in fresh
warm water. |
| Deck
Gear |
Rope performance in deck gear is
usually best served by trying to keep the rope as circular in cross
section as possible. Other deck gear should not distort the structure of
the rope unduly and would ideal not inflict a radius of less than 6 times
of the rope diameter. Where the rope is gripped, such as in a clam cleat,
the cover should be held over as long a distance as possible to avoid
overstressing the cover relative to the core. This consideration is
especially relevant to Dyneema ropes, where load transfer between cover
and core is particularly difficult.
|

Back to Marlow Home.

Please tour our rigging and sails site and Contact Us
for your mobile
service, inspections, consultations, installations, repairs and
assembly needs.
|
|
Home · Rigging · Sailing · Rope · Products · Links · Contact · Email
|
|
|
Search this Site!
|
Nance & Underwood Rigging and Sails
|
262 SW 33rd Street
|
Ph: 954-764-6001
|
|
Fort Lauderdale
|
Fax: 954-764-5977
|
| Florida 33315
|
Toll Free: 800-328-9782
|
|