Forums: Skydiving: Gear and Rigging: Re: [chuckakers] Accelerated wear on brake lines: Edit Log


floormonkey  (D License)

Jul 26, 2012, 8:22 PM

Views: 647
Re: [chuckakers] Accelerated wear on brake lines

Do you mean above the cat-eye or below the cat-eye?

Most of these responses assume below (the actual BK-TOG section), where your description seems to indicate the lower portion of the LSL (lower steering line). (Yes, I know it is a continuous brake line, but I also know Chuck has been jumping for a long time and will understand what I am saying).

If it is the BK-TOG section, examine what happens when you release your brakes (when the loop is under load). If you follow directions and insert the excess from the top, through both pieces of tape and then stowed by the pin, then when you release your brakes, your brake line "drags" across the top of the excess keeper, thus creating a friction point. If you stow by inserting your excess from the bottom, then when you release the brakes there is no friction or dragging against the keeper, thus causing less wear.

Making a bend in the line will not cause excess wear, unless it is on the "shoulder" of the fingertrapped line. Even then, it normally only causes the fingertrapped section of line to work it's way out.

My Velocity with Vectran brake lines have not needed a replacement until recently, around 600 jumps. (This is beyond manufacturer recommendations.) I'm just doing a lineset. My previous VX w/ Vectran brake lines, same story.

Other jumpers at my dz who stow "correctly" while having type III keepers (UPT,VSE style) have to replace them closer to 350-400. Well, not have to, but most riggers would recommend it. I find it seems to accelerate wear on spectra lines as well.

Risers with elastic keepers tend to have less of an issue in my experience. However, sometimes the bulk of the elastic makes it more difficult to pull your slider down, depending on the design.

FTR: Velocity, HMA lines, Vectran brake lines, VSE risers

If it's above the cat-eye, then it may have something to do with your slider grommets or how you handle your slider after opening. For instance, if you have "hats" and pull your slider down, the excess bulk may cause extra friction. Examine the lines above the soft link. Are they dirty/showing signs of accelerated wear? Examine the slider grommets for nicks/abrasions.

Good luck, and let us know what the result is. A picture would be nice, if you are able.


(This post was edited by floormonkey on Jul 26, 2012, 8:36 PM)


Edit Log:
Post edited by floormonkey () on Jul 26, 2012, 8:25 PM
Post edited by floormonkey () on Jul 26, 2012, 8:35 PM
Post edited by floormonkey () on Jul 26, 2012, 8:36 PM


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