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jerradob

spectra 1000 main loop

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I've been using a dacron 1000 pound loop for the last 200+ jumps. Its probally got another 200 in it but I'll be replacing it come spring time for a 1000 pound spectra loop since I like spectra better for the application. Only thing I've noticed is that you need to make sure the grommets are large enough to allow the loop to pass through. Also use of a pull up cord wears on the spectra loops more.
Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

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Try Type IIA,



While type IIA works great and is the industry standard, I really like using retired Spectra lineset as my closing loops. I feel I'm getting a second use, and they last much longer than the IIA
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You're not as good as you think you are. Seriously.

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JP,

What would a tunnel rat know about closing loops?;):P

I suspect you are using 500 or at most 750 spectra. It fits through the grommet better than 1000. It would probably never hang up, but I guess why my ex thinks I am anal.

If I beg, can I get free tunnel time?:)

Sparky
My idea of a fair fight is clubbing baby seals

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What would a tunnel rat know about closing loops?



Why, nothing really? What's a parachute?

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I suspect you are using 500 or at most 750 spectra.



Most of the time. Besides the retired lineset stuff is my favorite color. Free.
:P

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If I beg, can I get free tunnel time?



Hell, if *I* beg I don't get free time.:D
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You're not as good as you think you are. Seriously.

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"I suspect you are using 500 or at most 750 spectra. It fits through the grommet better than 1000. It would probably never hang up, but I guess why my ex thinks I am anal." - Sparky


I remember seeing a "table total" with a telesis student rig. It was well before I got my rigger's ticket, but I want to say it was either 1000lb. spectra or dacron. Anyways, I've stuck to IIA sleeving since then. You might be anal, but maybe that's better then my paranoia.

Ben
Mass Defiance 4-wayFS website


sticks!

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"I suspect you are using 500 or at most 750 spectra. It fits through the grommet better than 1000. It would probably never hang up, but I guess why my ex thinks I am anal." - Sparky


I remember seeing a "table total" with a telesis student rig. It was well before I got my rigger's ticket, but I want to say it was either 1000lb. spectra or dacron. Anyways, I've stuck to IIA sleeving since then. You might be anal, but maybe that's better then my paranoia.

Ben




Man I hope it was spectra, I would hate to think there is someone out there using 1000 lb. dacron for a closing loop. You would need a #2 grommet.:P

You know, it might be anal paranoia!:o

I am looking forward to alzheimer's, I think it is going to be fun.:S:o

Sparky
My idea of a fair fight is clubbing baby seals

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> I would hate to think there is someone out there using 1000 lb. dacron for a closing loop.

I'm almost postitive that Mike from Jumpshack gave me a 1000lb Dacron loop back at WFFC '03 that I'm still using every jump. Its either 1000 or 750 darcon.
Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

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> I would hate to think there is someone out there using 1000 lb. dacron for a closing loop.

I'm almost postitive that Mike from Jumpshack gave me a 1000lb Dacron loop back at WFFC '03 that I'm still using every jump. Its either 1000 or 750 darcon.



1000 pound dacron is about 3/8 of an inch thick.:)
My idea of a fair fight is clubbing baby seals

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Dacron has been known to take a "set" when used for closing loops, especailly in thew 800# or heavier. The combination of large diameter and "set" can cause the table total described in another post, but a bump on the container will release it. I've seen it. 1000# Spectra or heavier will have the same issues. I've only seen Dacron in 400#, 600#, 800#, 900# and 1575#.

725#, or lower, Spectra makes a great main closing loop. No "set" or diameter issues. A little dab of silicone and care with the pullup cord, and they will last for hundreds of jumps as you already know. The only major concern is the same as with all pullups/closing loops. The pullup will damage the loop if removed carelessly, something most of us learned during our first few packing lessons. Spectra however, has a lower tolerance to heat and is more easily damaged by a "zipped out" pullup cord. The real danger comes in that the damage may be hidden on the inside of the loop, even when put under the pin before removal. The heat generated by the friction from "zipping" the cord out can damage the sides of the loop, hidden against the pin.

As with any loop, proper tension is important. The coating on the Spectra and the silicone I add reduce the friction from both the pullup and pin. With proper loop tension though, inadvertant slipping of the pin is not an issue.

I use Spectra loops, but inspect them regularly, silicone them, and pack for myself. On the rare occassions that I use a packer, I remind them to be careful and then observe them. They know to be careful. It is my opinion that a 725# Spectra loop is superior to the industry standard of Type IIA Nylon for a main closing loop. Sandy Reid told me years ago that the only reason Type IIA is the industry standard is that it is abundant, can be found anywhere, and is very inexpensive. It works just fine, it just doesn't last as long as Spectra.
alan

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