Quantcast TABLE C-1. Fiber Comparisons.

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TB 55-1900-232-10
TABLE C-1. Fiber Comparisons.
Fiber
Cyclic
Bending
Abrasion
Heat
1
Type
Strength
Fatigue2
Fatigue2
Nylon (dry)
VG
VG
G
E
G
G
Nylon (wet)
G
F
F
F
-
G
Polyester (dry)
VG
VG
VG
VG
G
VG
Polyester (wet)
VG
VG
G
G
-
VG
Polypropylene (dry)
F
F
P
P
P
F
Polypropylene (wet)
F
F
P
F
-
F
E = Excellent VG = Very Good G = Good
F = Fair P = Poor
NOTES
1
Tensioned between two limits without bending.
2.  Usually running over pulleys. Some line wears out before failing from fatigue because
of abrasion between line and pulley
times produce a sharp crackling sound which is the result of readjustment of the line's strands to stretching, and
should not be alarming
With new line it is not always possible to get it to lay flat due to turns set into the line during storage on a reel.
Never tow with a nylon hawser to get the hockles or kinks out. Stream the line, controlling its payout with a
capstan, until the bitter end is reached. Retrieve it with the aid of the capstan and it will then lay flat as the
excess turns will run out of the line as it is being hauled m. The ship should be stopped during retrieval of the
line
When new lines are put in service as towing hawsers or springs, their identification, see Paragraph C-2 above,
should be recorded in the Towing Hawser Log described in Appendix F
C-7 COILING AND WINDING
C-7.1 GENERAL. Synthetic line is shipped in cut lengths, either in coils or on reels. Great care should be taken
when the line is removed from the shipping package since it can be permanently damaged by improper
unreeling or uncoiling. Looping the line over the head of the reel or pulling the line off a coil while it is lying on
the deck, may create kinks or hockles in the line. Never allow synthetic line to drag over rough surfaces since
this will tend to abrade and cut the outer fibers.
C-7.2 SPECIFIC.
CAUTION
A common method of uncoiling wire rope by rolling the coil along the deck is not recommended for
fiber lines because of the potential for abrading or cutting the outer fibers, and also because the coil
will collapse when the bands are removed.
C-3


 


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