Basejumper.com - archive

Just do the anchor sewing parallel to the direction of pull. The pins can only be 90° out vs 180 as is the norm.
do you see any cons?
take care,
space

Buy a Skunk Ape then you don't have to talk about it.

Buy a new rig as opposed to attach the pins 90°?
My sewing machine (217N -08 Bernina Industrial) would never forgive me.
It seems to me that modifying the pin mounts would be a lot better than designing a rig around a known problem.
That is my logic. What is yours?
Take care,
space

I only want jumpers to think in rigging. One can´t buy knowledge and realistically hope for it to work.
Dont be a sheep.
I mostly jump Velcro. at Terminado l. I keep my Velcro in order.
look up the stats for PIT vs Velcro/pin.
it is a shame that you do not know what you dont know.´We (Riggers) also have this curse.
It is nasty.
take care,
space.

I am amazed that I have not one comment riggingwise posted. It seems that simple solutions are not the issue. only bitching.
Enjoy politics.
Take care,
space.

Sounds interesting. But, 1 picture is worth 1000 words. Do you have a photo (or even a diagram)?

I am not a rigger so please take this with a grain of salt. But it seems like most, if not all, pin lock scenarios are actually container related issues (floating pin excluded). All of which seem to be concerned with loading the pin protector flap to a locking point where it won't open. I was taught if the pin has latitude to move (slack in the bridle) it will move as it has to. If I'm wrong do call me out on it. And if there have been issues with actual pin locks please let me know.
Thanks.

of course i have. but it doesnt take an illustionist to perceive a 90° turn. Not at you.
I also went in depth with a retractable pin but it was too complicated for sewing for the average rigger maybe so . the word average scares me so because i am dumb and jumpers continue to out dumb me. So you get a photo with the retractable pins and the 90°. I may get a prob with upload size.

Take care,
space.

i will try again to upload.
Fuck it. I am a rigger not a computer pro.
Find me on facebitch and the photo is there. Tracy walker.
take care,
space

The retractable pin bridle is wild. So, tension applied to the bridle makes the pin slip in sheath, and frees the loop. Really wild.

http://www.dropzone.com/...%20piercing;#4335286
Maybe i am getting too paranoid. It seems endemic without having a reserve option so cut me some slack.
I have been in investigations for fatal and non fatal accidents with diff governments. only got one WTF. but there were many fatals blossoming. Co related to the upsurge of pin rigs. But it could have been just numbers stats. but there has been only one fatal on a velcro rig reported. I would jump either system. but the WTF scares me.
Take care,
space.

it may seem wild, but... spending time with a sewing machine 24/7 could have influenced my ideas as the riggers who taught me me the tweaks. Notice that i did two successive "me".
It is all about one´s self in the end.
preservation.
take care,
space

When I jump Slider-UP I keep my pin cover closed.

When I jump Slider-OFF most of the time when I
open my flap to check my pin tension, right before
I put the rig on, I seldom re-close the pin flap cover
unless there is a good reason to do so, like an aerial.

When I am sub 200 feet I also untuck my riser covers.

When I make my closing loops I use an awl, which it
looks like an ice pick or leather punch, the diameter
of the shaft is incredibly close to that of a curved pin.

I do NOT like closing loops that have a loop so damn
big you could put a finger through, and for years have
been giving away free closing loops in both SKY or BASE.

When I close my rigs I never twist the pull-up cord,
nor do I put my feet on my container, I use leverage,
physics, and man-hands to expertly close the rig. I
have seen many new/uncoordinated packers fighting
themselves and the gear from a lack of experience.

When I insert the pin or pins into the closing loop(s)
I due so with respect to the direction the bridle will
be pulling. If a jumper has a twisted closing loop
and inserts the pin in just the perfect wrong way
then it creates basically a mini-belay, which will
eventually clear once enough force is generated
but sub-terminal, impact could easily occur first.

For those who do not know -- most of the time a pin
rotates from laying flat, to standing up, to extracted.

A good practice for novices to better grasp more of
what we are trying to explain: manually open as
many rigs as you can, yes you will have to re-close
but not re-pack each rig. Use your hand, gently
pull the bridle out and watch your pin or pins,
try pulling in different directions, try it with the
pins frowning, smiling, every configuration, etc.

I honestly believe/think it will be time well spent!

Last contribution, when you don your rig and put
the straps on extra tight, pin tension can change
dramatically. Find a friend as close to your size
as possible, does not need to be a jumper. Then
feel your pin tension with your hands or a fish
scale, then have your buddy get in the harness,
loose at first, feel the pin tension, then nuke
the straps, tight as you can, feel the pins again,
okay now have your friend arch, then ball up.

Body position, clothing, weight gain, and strap
tension all affect the pin tension considerably.

[/image] Foto by Spacey

Im no computer pro
Im no rigger
I sure wouldnt jump this for multiple reasons. You have taken pins off the bridles strength axis and when shit hits the fan, looks like a great way to shear a bridle.

Like I hope i imposed. Velcro is better in the endgame.
I am a very conservative jumper in my opinion same as who ever is reading this.
Conservative is a dynamic word or label.
I do no stowed pc slider off. it has worked for me over the decades of jumping.
hmmmmmm...
New age jumpers maybe have no idea of a fingertrapping tool which grows to having no idea of the length and why.
I think i should just request a self made loop and then answer them.
Most do not know how horrible it is to see a jumper on the wrong path. One can do nothing but surf the internet and see the fatals. The edge is so near. no one will listen to you as you are an ultraconservative jumper.
I must add a disclaimer. The doctors have nailed me for autism.
But my stuff ideas still works. Asperger´s syndrome still sux.
take care,
space

Awesome that you replied with the cons. Thank you!
Let us do the math.
The 1 " box weave bridle is rated at 1000 pounds of breaking strenght. i think. I did some calcs before on this but i tend to disremember bs.
Bill Booth, stated his data on extraction speeds. it was about around 30-40mph was optimum. So then we extrapolate pc size of a same design at certain speeds. In my case, mostly terminal jumps. Note that the bias vs block can make a 30% diff in drag.
so i sew a bartack sim to attach the pins. 6 straight stitches zigzagged over with e thread, standard sewing stuff for riggers. it has a 8 pound tensile rating. the modern way is to to calculate how many stitches times rated, and multiply by 0.8 to have what is considered an acceptable safety factor for the sport.
So let us get back to the math.a 38 stitch with e thread would be 38 times 8 pounds multiplied by 0.8.
So one would be like Attaching a 200 and fiftyish load on a 1000 load handler.
way down Or maybe better from safety factor 0.8.

Am i correct in stating that pc drag will never out fly you? One cannot IMHO. so that means that the drag of the pc will never go over mass x time.
i didnt calculate darkmatter.

Thanks for posting the pic. I think it is an interesting concept and if it gets tested I'm curious how it works. Unfortunately I don't have time to make one myself and test it.

One thing looks kind of funky to me though. It's hard to describe in words, but I can picture the nylon that goes through the eye of the pin, rotating around to the "back side" of the pin, and putting an adverse pulling force on the pin. i.e. instead of "standing up" the pin, doing the opposite and digging the pin tip down into the container fabric.

does that make any sense?

My Wings skydiving container (about a year old) came with a bridle that was made this way actually. And the bridle is ridiculously short (like, low freefall bridle short), but that's not really relevant to this discussion. I don't really like it because it's weird, not really for any good reason. I thought I remember someone telling me the joint was stronger though? Maybe because the webbing is wrapped around as opposed to directly sewn on?


Yes, but do you think that is more possible with this bridle style than a traditional style?

I had to reread your question 3 times, ok, i go for 4 times. IMHO. I was only referring to plan b which was the lower in the foto. The upper retractable pin is so cool but not really practicable.
hmmm as to your obscure post. sorry but you asked if that made any sense, to me it is simple math.the pin always turns 90° to resist this one must sew an acceptable stitch direction.
My method uses the 90° as an advantage. send me your snailmail via pm and i will send it to you. Please forget the plan A retract.

What do you mean by low ff short? bridle length.
take care,
space.

I did forget about the bridle piercing reports that have come up. Thanks. And yeah, that does resemble a wings bridle.

These are in skydiving or BASE jumping?

To: Spacey Tracy

Some guys who Freefall super low objects
choose to use a very short bridle and then
pre-inflate the PC and/or throw up at exit.

To: Ian

I have never heard of a pin piercing a bridle
in BASE jumping, but I have heard of a few,
make 4 or 5, in SKY jumping. My guess as
to why would be pin tension, higher speed
deployments, design, and less concern in
the packing process since there's plan B.

I think it is more due to the lighter bridle material, usually binding tape vs square weave, and as you said packing.

Show evidence if binding tape bridle used in BASE. Also show me a pin piercing on BASE. I think neither situation has existed. it is possible, but not likely. I studied gear 2pin rig fatal from PIT. (pc in tow) tracking jump. it was a WTF scenario. my team could only ascertain that the sleeve velcro. ( an addition to the bridle)) some how hung up. We could not replicate it on the table.
It looks that pin covers are the prob. it diverts the direction of the pull force.
It was a shriveled wingsuit mod on the bridle sleeve velcro.
sorry getting sad. i go now.
take care,
space.

I've heard that a flat bridle (as opposed to tubular) would contribute to this. Is that the point you're trying to make? I've never seen a binding tape bridle, but I know that doesn't mean they aren't out there. I am also under the impression that packing style and how you lay/tuck your bridle can contribute to this.

I don't need to. My post was in reference to the Green guys post about skydiving bridles. Try to keep up Spacey.

ok.
take care,
space

Referring to skydiving. Although never heard of a pierced bridle in base as to date. I always believed the snatch force of a properly chosen pc made priming the pins voodoo until I considered it pretty much eliminates the possibility for a pierced bridle.