Fruits Of My Labor (A-113)

[ebb]

fiber (from the Dynamica site).
5/16" has a 6600# breaking load which is about equal to wire of the same dimension.
If steel wire can take 6500 50% breaking loads (....before what happens?)
Dyamica, dyneema can take 10 million cycles at the same 50% level. That's their comparison.

Very little stretch. If it breaks it won't whip like steel wire.
After two years of constant UV exposure 80% of strength is retained.

Bends recommended at least 5 Xs diameter of rope. Bends for 5/16" Dyneema should be minimum 1 1/2". Sheaves and/or thimbles. Visavis Joe Cooper's experiment.

Defender has a Samson dyneema called Am-Steel-blue for $2.09 ft.
This 5/16' rope has a 13,700# breaking strength. Just repeating the numbers.
It's a 12 strand braided line.
Defender price for 316 1/4" 1X19, 6900#BS = $3.09.

later post....
[Dyneema is seen as an all purpose polyethylene rope. Versatile, bullet proof, floats in water, 40% stronger than Kevlar.
Climbing, towing, mooring, hanging, winching, standing rigging, running rigging.
and picking up on your next post here - why not LIFELINES? Both on the stanchions and tethering a life-ring.
Wouldn't it be nice if our backup rigging is a spool of blue plastic rope that can be used for nearly everything?

Would you do the standing rigging with soft eyes?
Which begs the question, if Dyneema is sensitive to UV why not parcel (friction tape)l and serve (marline) it in the standing rig.
I'm positive galvanized wire is still parceled and served somewhere. Dyneema's downfall is everything SHARP. Serving it would stiffen and protect it.
Real Dyneema comes from Denmark or Greenville NC and is heat set and coated with polyurethane.]

Anybody care to compare wire rope VS Dyneema in terms of replacement?
Dyneema's loss of 20% strength after two years UV exposure IS SIGNIFICANT imco.
But what has happened to 316 stainless in that time period?
Is the Dyneema (as standing rigging) signicantly easier to replace??? Does the mast have to be lowered to do it?

Have to see a tutorial on replacing stainless steel wire with Dyneema rope on an Ariel/Commander.
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Dyneema and Spectra are the same, yet not the same.
google>
PDF Spectra & Plasma Ropes Introduction Puget Sound Ropes (PSR) began...
This paper will give you the lowdown on this fantastic plastic rope.