Forums: Skydiving: Gear and Rigging:
Slipping main lift web on Sigma

 


Wharewaka  (D License)

Jan 26, 2013, 10:12 PM
Post #1 of 25 (3385 views)
Shortcut
Slipping main lift web on Sigma Can't Post

I have a problem with slipping main lift web on my Sigma Micro (2011). I was advised to wash the webbing in warm water but that did not help. It slips about 2 inches every jump o both sides.


RIGGER  (D 7933)

Jan 27, 2013, 1:16 AM
Post #2 of 25 (3337 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Smile Hi

Please fill out your profile & location IMO it will look better.

Contact UPT for that.

Cheers


irishrigger  (D 297)

Jan 27, 2013, 5:54 AM
Post #3 of 25 (3281 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Hi Wharewaka,

you def do not have agood situation there with the MLW slipping. its going to be hard to troubleshoot without seing any pics of it, but are you sure the webbing is routed correctly? did you inspect the metal hardware to see if there is any damage or wear on it.
i would recommend that you dont jump it until you got to the bottom of this,what if it slips more than 2" the next time? i am not sure what washing it in warm water would achieve? is there any rigger on your DZ that can have a look?
I would also email UPT about this straight away and get there input. send them all the details you can as to rig no and date of manufacture, how many jumps are on it ETC.
if you could post a couple pics of the MLW and hardware you might get a solution to this.
i had a leg strap that had a tendancy to slip, when it was eventually brought to my attention i noticed the teeth on the hard ware was worn away to nothing and had to be immediatley replaced.

hope you get it sorted out soon dude

rodger


Premier SkymonkeyONE  (D 12501)

Jan 27, 2013, 8:22 AM
Post #4 of 25 (3245 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

have you disassembled the MLW friction adapters ever for some reason? If not, and you know they are correctly assembled, I recommend loosening them up and cleaning the hardware on ALL SIDES with some alcohol to wipe off any oils that might have accumulated. My legstraps used to slip a lot when I was jumping in Arizona and I had to really stay on top of it and keep them clean.

Chuck


JohnSherman  (D 2105)

Jan 27, 2013, 7:47 PM
Post #5 of 25 (3155 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Quote:
I have a problem with slipping main lift web

If your hardware is an MS22040 friction adapter and your webbing has a yellow trace along the edge then they are incompatable and will slip no matter what you do. The yellow trace webbing is Mil W-4088 Type VII has been studied, by Bordoin Forge, for slippage, in hardware used on personel harnesses. They all slipped.
This is the reason the military requires, and some manufactuers use, Mil W-4088 Type XIII harness webbing, which has a black trace along each edge. It was designed speciffically for use with the hardware used on personel harnesses (a hold over from cotton harnesses) and doesn't slip.


Wharewaka  (D License)

Jan 28, 2013, 12:22 AM
Post #6 of 25 (3111 views)
Shortcut
Re: [JohnSherman] Slipping main lift web on Sigma [In reply to] Can't Post

Thanks- will have a look in a few days I'm not using the rig at the mo.

For the other posts above- I have tried all (including contacting UPT) except for cleaning the hard wear and will try that next. I had riggers look at it with no result. I put waxthread through the webbing (sent pic to UPT and they said OK) but don't think that is a good solution really longterm.

I did not put the webbing wrong through the hard wear!

To the person who ask who I am- PM me and I can let you know, but cant see why that matters...


RIGGER  (D 7933)

Jan 28, 2013, 9:16 AM
Post #7 of 25 (3059 views)
Shortcut
Re: [JohnSherman] Slipping main lift web on Sigma [In reply to] Can't Post

 Hi

The Sigma h/c MLW is Ty.13 run into SS hardware.

There are 3 types of SS hardware UPT is using:

1. French 2 parts SS hardware as seen on most h/c leg straps made by CWH.
2. SS hardware with small spring by Wichard.
3. SS hardware with a bigger spring made by CWH

See the photos.

I have here Sigma h/c's with all the 3 types of hardware & no issues at all.

Cheers


(This post was edited by RIGGER on Jan 28, 2013, 9:24 AM)
Attachments: CWH WITH LONG SPRING.JPG (139 KB)
  WICHARD WITH SHORT SPRING.JPG (164 KB)
  CWH 2 PARTS FRENCH HARDWARE.JPG (170 KB)


Wharewaka  (D License)

Jan 28, 2013, 12:30 PM
Post #8 of 25 (3014 views)
Shortcut
Re: [RIGGER] Slipping main lift web on Sigma [In reply to] Can't Post

Hi,

My rig has CWH 2 PARTS FRENCH HARDWARE
With issues that I hope I can sort out.


Premier skydiverek  (C 41769)

Jan 28, 2013, 1:17 PM
Post #9 of 25 (2996 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Are the springs still strong? Just curious.


Deyan  (D 322)

Jan 28, 2013, 1:19 PM
Post #10 of 25 (2995 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

In reply to:
Hi,

My rig has CWH 2 PARTS FRENCH HARDWARE
With issues that I hope I can sort out.

It's a long shot, but check the routing of the type 12 buffer around the adapter. Is there a piece of webbing between the 2 metal parts of the adapter?!


richwilk  (E License)

Jan 29, 2013, 12:10 PM
Post #11 of 25 (2926 views)
Shortcut
Re: [Deyan] Slipping main lift web on Sigma [In reply to] Can't Post

I have exerienced this problem with the sigma harness and stainless 2 piece hardware a number of times and it seems the simplest fix is to ensure your elastic webbing keepers are tight on the harness and secure against the hardware. In addition ensuring the excess leading down the main lift web towards the leg strap junction is secured by the same tight elasic keepers. Since ensuring the keepers are in place, I haven't experienced this problem. Good luck, its very unnerving feeling the harness loosen up during the opening wiggle. By the way, cleaning and checking the hardware geometry isn't a bad idea either. Cheers


Bertt  (D 99999)

Jan 29, 2013, 2:37 PM
Post #12 of 25 (2874 views)
Shortcut
Re: [irishrigger] Slipping main lift web on Sigma [In reply to] Can't Post

As far as the washing in warm water goes, I have seen a case where a drink (Mountain Dew) was spilled on a leg strap. When that dried, the fabric became very slick and slipped badly. Washing in Woolite and warm water cured that problem. That doesn't seem to be the problem here.


Wharewaka  (D License)

Jan 29, 2013, 11:56 PM
Post #13 of 25 (2827 views)
Shortcut
Re: [RIGGER] Slipping main lift web on Sigma [In reply to] Can't Post

Pic attached.
Attachments: image_2.jpeg (115 KB)


RIGGER  (D 7933)

Jan 31, 2013, 2:16 AM
Post #14 of 25 (2752 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Smile Hi

I see the picture but no way to see the Ty.12 bufer inside the hardware slot.
Does the Ty.12 is there as should be ?

Cheers


Wharewaka  (D License)

Jan 31, 2013, 4:07 PM
Post #15 of 25 (2706 views)
Shortcut
Re: [RIGGER] Slipping main lift web on Sigma [In reply to] Can't Post

How about now?
Attachments: image_1.jpeg (110 KB)


Deyan  (D 322)

Jan 31, 2013, 4:27 PM
Post #16 of 25 (2694 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

This one is much better. I can't really tell from the picture, but it looks like the buffer going around the thin piece of the adapter is too short. When you put loading on the MLW, the small piece should be able to move forward to lock the webbing in place. If the buffer is too short, this forward movement will not be possible .

Then again, it's just a picture and it's hard to tell how exactly the buffer is routed.


MrHixxx  (D 24144)

Jan 31, 2013, 6:08 PM
Post #17 of 25 (2669 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

A light application of beeswax on the webbing may help. I have a friend that used this on his Vector III and it helped. Going to try it on my Wings with Type IIV silver with parachutes de france stainless adapters. My silver harness slips but, my black harness does not...


JerryBaumchen  (D 1543)

Jan 31, 2013, 6:37 PM
Post #18 of 25 (2652 views)
Shortcut
Re: [Deyan] Slipping main lift web on Sigma [In reply to] Can't Post

Hi Deyan,

Quote:
I can't really tell from the picture, but it looks like the buffer going around the thin piece of the adapter is too short.

As a certified old guy, your eyes are probably better than mine but it looks as though there is a piece of T-12 going around the large piece that is secured close. Then the piece of T-12 going around both pieces seems to be loose enough that the smaller piece can move and do its 'clamping' of the webbing.

Or are my eyes really going south on me?

JerryBaumchen

PS) And I just got new glasses about a month ago. Crazy


Wharewaka  (D License)

Jan 31, 2013, 10:26 PM
Post #19 of 25 (2636 views)
Shortcut
Re: [JerryBaumchen] Slipping main lift web on Sigma [In reply to] Can't Post

Here is one more..

Thanks for your input guys.

Edit: There is no tension on any of the pics the rig is sort of laying on it's back.


(This post was edited by Wharewaka on Jan 31, 2013, 10:28 PM)
Attachments: image.jpeg (113 KB)


Deyan  (D 322)

Feb 1, 2013, 12:44 AM
Post #20 of 25 (2621 views)
Shortcut
Re: [JerryBaumchen] Slipping main lift web on Sigma [In reply to] Can't Post

In reply to:
As a certified old guy, your eyes are probably better than mine but it looks as though there is a piece of T-12 going around the large piece that is secured close. Then the piece of T-12 going around both pieces seems to be loose enough that the smaller piece can move and do its 'clamping' of the webbing.

Or are my eyes really going south on me?

JerryBaumchen

PS) And I just got new glasses about a month ago. Crazy

You are right Jerry Smile

Now tell me where you've bought those glasses from Cool


irishrigger  (D 297)

Feb 1, 2013, 9:28 AM
Post #21 of 25 (2575 views)
Shortcut
Re: [Deyan] Slipping main lift web on Sigma [In reply to] Can't Post

Maybe I need glasses aswell, but that the smaller of the 2 metal be turned around 180 degrees?


JerryBaumchen  (D 1543)

Feb 1, 2013, 11:39 AM
Post #22 of 25 (2545 views)
Shortcut
Re: [irishrigger] Slipping main lift web on Sigma [In reply to] Can't Post

Hi irish,

Quote:
the smaller of the 2 metal be turned around 180 degrees?

Based upon what I understand, it is correct. I have some of this hardware that I bought just to play around with.

And I readily admit that I may be wrong on this. This hardware is rather new to me; I may use some of it or I may not.

Attached is a photo of a mockup that I made to see how things would look, fit, etc. In this mockup, the upper portion of the 'harness' and the adjustable portion of the 'harness" are Type 8; just to hold things together and to study them. Also, there is only one piece of Type 12. This piece of Type 12 has both ends sewn/captured into the upper portion, the non-moveable part of a typical harness. It comes down & goes under the backside of the upper bar of the larger piece, then goes completely around the upper bar of the smaller (clamping) piece, and then goes back up, again under the backside of the upper bar of the larger piece.

Does this make sense to you?

I wish the photo were larger and more definitive but it is what it is.

This hardware is marked: CWH 11

In my latest issue of the ParaGear catalog it is listed as Item #HSP888.

JerryBaumchen
Attachments: SS.jpg (71.8 KB)


irishrigger  (D 297)

Feb 1, 2013, 12:52 PM
Post #23 of 25 (2528 views)
Shortcut
Re: [JerryBaumchen] Slipping main lift web on Sigma [In reply to] Can't Post

Hiya Jerry Baumchen,

I might be wrong on this it was just a tought, but i thought the "Thick" part should have been the other way around to stop it moving and slipping around.
when i get home form work i have to look at my own rig as i have the same hardware i believe.
Still cant really see why the MLW would still slip.

thanks for your input Jerry

Rodger


Wharewaka  (D License)

Feb 1, 2013, 9:49 PM
Post #24 of 25 (2484 views)
Shortcut
Re: [irishrigger] Slipping main lift web on Sigma [In reply to] Can't Post

I don't think it is the wrong way around on my rig, there is some other problem.

How about if I ask someone to put one more layer of webbing on like some have have on their legstraps?


RIGGER  (D 7933)

Feb 1, 2013, 10:16 PM
Post #25 of 25 (2481 views)
Shortcut
Re: [Wharewaka] Slipping main lift web on Sigma [In reply to] Can't Post

Smile Hi

Ty.13 should not slip in the hardware - did you checked with UPT ? They will assist you.

BTW where you jump ? dust ? sand ? or just the Ty.13 coating quality ?

Adding Ty.12 on the Ty.13 MLW will not let you move it up or down when the sigma is on your back.

The Ty.17 was added to legstraps was on Ty.7 webbing & done by Aerodyne & RI.

Cheers



Forums : Skydiving : Gear and Rigging

 


Search for (options)