This post alone is worth every dime that I paid to join TowerTalk!
(Well, OK, I got in for free, but it still is a very valuable post. Thanks,
Patrick)
73, de Hans, K0HB
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On 8/31/2015 13:26 PM, Patrick Greenlee wrote:
Nylon is used on boats because it stretches like a rubber band and when
used for an anchor line does not transmit much shock to the deck hardware.
For hoisting sails (halyards) and for sheets (lines used to control sails)
Dacron is used for its minimal stretch (desirable characteristic.) Steel
cables (wire ropes) are sometimes spliced to rope "tails" for better
manual handling characteristics and the rope of choice is Dacron.
Nylon is useful for towing a boat because of it stretchiness not putting
shock loads on deck hardware. Great heat is generated by inter-fiber
friction when the nylon is stretched and when wet the nylon shows its heat
by copious quantities of steam. Failure to let the tow rope contact the
water for cooling purposes can result in melting the nylon rope leading to
catastrophic failure.
I have considerable experience as a rag sailor and 10 years in maritime
search and rescue. I advise folks wanting rope for guys to avoid nylon if
it will be loaded such that it stretches and recovers as in variable wind.
Dacron is a far better choice.
Patrick NJ5G
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