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sundevil777 last won the day on October 5

sundevil777 had the most liked content!

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About sundevil777


  • Main Canopy Size
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    Pilot ZPX
  • Reserve Canopy Size
  • AAD
    Cypres 2

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    Formation Skydiving

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  1. sundevil777

    Diff between RW & Competition jumpsuits

    The important thing is to call the mfg with your measurements and let them help you decide how to get a fall rate that will allow you to easily play with others. Nobody flies best when having to fly near the upper or lower limit of what they can do.
  2. sundevil777

    Main Pilot Chute Question

    It may be that the kill line is too long, so it isn't collapsing enough, allowing it to grab enough air to twist. That is the theory anyway that some will propose.
  3. sundevil777

    Can You Install a Skyhook Into any Rig? How?

    The "affecting the TSO" that was mentioned was only related to the hypothetical case of having someone modify a rig to use a skyhook. You can stop thinking about that completely.
  4. sundevil777

    Can You Install a Skyhook Into any Rig? How?

    Not just the Jav, it is also available on the Icon and Vortex. Maybe others also, come on people!
  5. sundevil777

    Audibles with adjustable volume?

    I wonder if the L&B Solo has adjustable volume? If we want to go old-school, then of course the original dytter that few have ever seen was definitely not adjustable for volume, and the paralert from Steve Snyder (even less likely to be recognized) was also not. I think the old time-out was fixed volume. Every other type I know of is adjustable.
  6. sundevil777

    Lubricating the 3-ring loop

    I think the value of lubricating the inside radius of the 3-ring loop where it contacts the release cable is important and underappreciated. Of course lubing the cable in general is important, but I think a substantial part of the overall force to pull a release cable is due to the drag right at the loop, and applying lube to the loop is a subject worth addressing. The attached pic provides some evidence to support my claim. Mr. Booth used it many years ago in a thread where he advocated the benefits of the traditional, large 3-ring system over mini rings. The different graphs were intended to show how pull force varies with the load at the loop, with the different systems having a different mechanical advantage (and some effect from inconsistent construction affecting mechanical advantage) which results in different loads at the loop. While on the subject of reducing pull force, we might as well touch on what I think is now widely accepted that silicone lube is best instead of some type of oil or other product. I think the gel type silicone grease, such as the cypress loop grease is better than the spray type. Other threads have devoted a lot of discussion about food grade silicone sprays, but the gel makes more sense to me. Please correct me if I am wrong. Perhaps there would be fewer instances of hard pulls and only one side released if lubing the loop were standard practice. I can't remember it being emphasized in all my years. I put the gel grease right on the inside radius of the loop, what do you think?
  7. If the handle is pulled somewhat slowly, or without maximum effort, I think there is a natural tendency to feel the cable moving gradually and then stop when a change in the level of force required to move them occurs. This change of force happens when one side releases first. The length of pull required to release the 2 sides are slightly different - intended to release the side with the RSL last to prevent reserve deployment if a lazy pull is done. The jumper would hopefully recognize that only one side is cutaway and complete the pull. I think it is not reasonable to expect the cable lengths to be just right so as to prevent one side releasing first, therefore the lengths are setup to make the RSL side last. The way to prevent the issue is to apply maximum effort and distance of pull - the expression used to be "punch it". The training to sweep the cables free is I think a recognition that students can't be trusted to punch it all the way out. Every time I've activated a release system, whether capewells or a 3-ring release, I've never had a sense of how much force was actually required because I punched it like my life was on the line.
  8. sundevil777

    Audibles with adjustable volume?

    It is wise to be concerned about damage to your hearing, but wind and airplane noise are also damaging. I prefer the noise filter type earplugs such as these: Many threads can be found on the subject, and reports of hearing your audible more easily with all forms of earplugs is I believe always true.
  9. sundevil777

    Fuel per jump

    Electric plane thread
  10. Dacron lines thread Dacron lines ought to be considered.
  11. sundevil777

    Boeing 757 hard landing in the Azores

    Ha! “Were they really able to buff out all the damage”
  12. sundevil777

    Full-face helmets

    Of course we understand the G4 will perform better, but you insisted the G3 has negligible benefit, insignificant. Decide which. Of course wood is a better thermal insulator than glass, but it is not insignificant. Engineers worth anything don’t think like that.
  13. sundevil777

    Hurricane to Cool openings

    I don’t understand your comment about it being so big.
  14. sundevil777

    Full-face helmets

    Are you trying to be a troll?
  15. sundevil777

    Full-face helmets

    What is so magical about that standard? I am certain that a tougher standard could be written, that would provide more protection that would help in some scenarios, and that would require a heavier, bulkier helmet to comply. The standard is a compromise, but you don’t seem to see it that way. I have no doubt that it performs better than the G3, but to assert that not meeting the standard makes the protection provided insignificant is not correct. This is not how engineers should analyze problems. I was sure we could have an interesting conversation about the new helmet, but this is really tiresome.