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Everything posted by sundevil777

  1. I never heard of different tones before. IMO the siren tone should not be common to hear, let that siren be the uncommon wake up that you’ve been trying too long, no more time left, must do EP now. Should be much lower than 3.5.
  2. A larger canopy is less sensitive than a small canopy to uneven riser position due to bad body position, or a riser cover on one side that doesn't release at first, or anything else.
  3. 1) The critical/center locking stows must not break. I use tube stows for the first 2 locking stows because they are so much stronger. There is a reason the Racer speedbag has so many locking stows - you shouldn't trust just 2 regular rubber bands to hold the bag closed. 2) Dacron lines Not just because they absorb more shock, but also because they have a long history of limiting the speed at which a slider can move down them (my assertion). Whether it is just coefficient of friction or whatever, dacron lines and sliders grommets work well together. 3) Larger canopies As discussed, real world testing experience showed the worst loads with smaller canopies. Whatever might cause an uneven body position/riser position, whether it is a tuck tab riser cover not releasing correctly, or just bad body position on opening, a larger canopy is less sensitive than a smaller canopy.
  4. I suggest finding the thread about always keeping the slider "outside" of the rest of the canopy so it would in theory hit the wind reliably and early to keep it up against the stops, instead of allowing the slider to be shielded from the wind which could allow it to fall away from the stops, theoretically. He had a lot of successful jumps packing like that, a lot of people thought there must be some hidden unintended consequence...
  5. Hard openings just weren't as hard back for the "modern" canopies I used back in the 90s. I think dacron lines has a part in it (see other thread of mine about that more specifically) and I suspect that some explosive openings might be due to the locking stows breaking prematurely. Those locking stows are subjected to their max stress right at the time it matters most (of course), so I advocate locking stows that are stronger than just a rubber band - whether it is tube stows, silly stows/rings/whatever. Have you ever found a locking stow broken when packing - ask yourself if it might have broken before line stretch, not a comforting feeling. We deserve something for the locking stows that is designed to not break. I recognize the argument of a rubber band breaking for a bag-lock malfunction, but for my 2 center locking stows prefer the additional protection against what I see as the primary mode for fabric to be dumped into the air early. Since I first heard about tube stows, probably late 80s, I've used some type including making a lot of them. Never a problem.
  6. After 3 consecutive hard openings as you describe, don't jump it anymore - a visit to somebody/somewhere for diagnosis is appropriate. Serious inspection with the possibility of test jumping by someone else should be considered.
  7. I switched from spectra to dacron on my Pilot 210 with ZPX material. I put it in an Infinity with a size 6 main tray. When I switched, I really expected it to make a big difference, but it is barely noticeable in my rig, even with the long lines of a 210. I could easily upsize to a 230ZPX with dacron in that container.
  8. They aren't selling the normal stuff anymore (very limited selection of gear). I heard the GSG store was sorta the offspring or whatever.
  9. What happened to SQ1? When will the new store's website be up? I apologize if this has already been covered.
  10. I don't think that sort of system is in use currently. With the existing skyhook sort of collins lanyard system, depending on which side of the main riser breaks, you either have both sides cut away and reserve activated, or a high speed streamer/one riser attached but no activation of the reserve, which is OK also. Bill Booth I believe has previously written on this forum about the inherent weakness of mini risers possibly being the most practical way of limiting force. Maybe we'd be better off to not have the reinforcements on mini risers, but have to keep a close watch for signs of damage and replace them after a certain number of jumps or use some force test setup to confirm a minimum strength if in doubt...Risers would need to be made very consistently, maybe destructively tested samples confirming things. It would be a hassle, but could be effective.
  11. A French way of making riggers crazy. I had not considered how the loops would have to be so close to identical.
  12. My memory is that it was a French way of making sure both risers left before the RSL activated the reserve. Used for at least some time on parachutes de France rigs, at least some of them.
  13. Nice, I've never liked the idea of planning to throw your cutaway or ripcord for this reason. I don't doubt my ability to pull, I don't doubt the ability of objects in the air stream to foul a canopy.
  14. It might be that the new version was ready to go some time ago, but the trigger wasn’t pulled because they were still selling the old model easily, and pulling the trigger on the new model might mean a significant investment in production tooling. Their competition (G4) could reduce sales enough to reconsider the need for a replacement.
  15. I jump a Pilot with Dacron lines. I wonder if this talk of stretching risers might all be pointless. What we first should be figuring out is how much of a "crumple/stretch" zone is needed to significantly reduce a hard opening.
  16. Dacron lines rock! The characteristics of dacron lines and slider grommets play well together, or some such thing.
  17. When asking for advice on the internet, a person should expect to provide the same relevant information as if it was being asked in person.
  18. As a newbie asking for container-size advice, you ought to confess your weight, so we can know the WL you’re considering.
  19. Many mfgrs make longer/narrower versions, for the Infinity they have an “N” at the end of the size designation, for example I-56N.
  20. High strength to weight ratio does not mean high ability to absorb impact. I would expect carbon fiber composites to not do well in terms of toughness (area under the stress strain curve). My memory was that they are relatively easily damaged by dropping on a concrete surface for instance. The damage from such an impact is not just aesthetic damage, it significantly reduces the strength. Please correct me if my impression is wrong.
  21. Why is a carbon fiber shell critical to you?
  22. Snoridian Perrisote Ha! The decision boils down to what you want to be called.
  23. Quite right! I'll choose to cut my cutaway pull force in half instead of having mini-rings. This is especially true for heavier jumpers, and when cutting away from spinning mals.
  24. If we assume a total of 10 minutes of UV exposure for each jump, which I think is a reasonable number, I think it would help us to get a perspective of how much our gear is exposed during a season of jumping: 100 jumps = 100*10/60 = almost 17 hours of exposure. You may think the 10 min/jump is too much or you jump more/less, but we already allow the sun to drench our gear. I don't know how much time it might take for UV light to take care of the cooties on nylon, but I wouldn't expect it to be hours.
  25. Using skotchguard is common, but I’ve never heard of using armorall