darkwing

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Posts posted by darkwing


  1. It might work. Be prepared for the thread to not take the dye well. Also, are the booties and grippers made of different fabric than the jumpsuit? There is a good chance it will be very different than you hope if you dye it, but it may be OK. Be prepared for it to be even uglier, but nothing ventured, nothing gained.

    Also, if you do it in a washing machine, you had better be the owner of the machine, or prepare to incur the wrath of the owner if you don't clean it out better than you think you need to.

    Either way, it is good for your character to wear the ugliness proudly.

    -- Jeff
    My Skydiving History

  2. also, with the brakes released, how many inches (or cm) of toggle does it take to correct the problem?

    I second the idea that sometimes it can occur even if all lines are perfectly right. Even if the harness is right. Even if you are not sitting lopsided. Sometimes a canopy will just turn in spite of those things. I suspect every manufacturer has a tolerance for how much toggle correction it takes to get it to fly straight. When you talk to them BEFORE you send it back, they will likely want to know the toggle differential.

    -- Jeff
    My Skydiving History

  3. I'll answer one you asked, and some you didn't...

    I think the first modern 4-way at the nationals was 1977. When I say modern I mean that was essentially like today's rules. Prior to that the competition was what many people call hog-flop 4-way -- 4-way, backloop, 4-way -- based on the time to build the second formation after breaking the first.

    Teams were doing transitions on the hill immediately under the new rules.

    Initially competition was out of Cessna 182 aircraft for several years. I don't know when it went out of other planes. Judging was ground-based video. I don't know when it went to in-air video.

    Blocks were in modern 4-way from the beginning, although block transitions were specified for an entire dive, not just two points on a dive. See attached 1979 divepool. (I particularly like sequence #7).

    One big difference between then and now was that the formations had to look like the diagrams (although they could be mirror imaged). For example, a cat had to be straight, without reaching across and "cheating" grips. It made it slower.

    -- Jeff
    My Skydiving History

  4. Old tyme rigger guy speaking here...

    I have certainly seen the type of cross connector you describe. I never made any of them though. My recollection is that I thought they were military, and I don't recall I hesitated to pack them. I can't imagine it only connecting two of four links though. It seems a very bad idea to me.

    -- Jeff
    My Skydiving History

  5. Quite a while ago a guy brought me a similar rig to pack. I told him it wasn't airworthy, and no rigger I knew would pack it. He got mad, saying I was trying to sell him a new rig. I offered him the new rig at cost, and he was still mad. He went to the FAA and they told him to pay close attention to what I said, and stop bothering them.

    -- Jeff
    My Skydiving History

  6. Physicist and rigger here...

    Their assertion seems reasonable to me, but could only be determined by actual measurements on the real thing--there are too many important variables that you'd have to estimate. The force on the terminal knot depends on the friction in the system above the knot. It isn't amenable to analysis except very crudely, not in such a way as to cast any doubt or support for their position. Still, their value seems quite reasonable to me.

    When tested to failure, I suspect the place the loop breaks is at the business end of the loop, with the reserve pin in it.

    Regarding the Vigil system. I have never handled one, so I can't say much, other than it is likely they tested it to failure several times. I don't see the strength at the washer end as being a tricky thing to insure. I suspect theirs also breaks at the pin end.

    Jeff

    -- Jeff
    My Skydiving History

  7. I couldn't find the video, but from your description it just sounds like your legs are relaxed, not necessarily a bad thing.

    -- Jeff
    My Skydiving History