mxk

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Gear

  • Container Other
    Vector3
  • Main Canopy Size
    230
  • Main Canopy Other
    Spectre
  • Reserve Canopy Size
    235
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    Optimum
  • AAD
    Vigil 2

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    Skydive Orange
  • License
    D
  • License Number
    36227
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    USPA
  • Number of Jumps
    900
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  • Years in Sport
    5
  • First Choice Discipline
    Formation Skydiving
  • First Choice Discipline Jump Total
    520
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    Wing Suit Flying
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    380
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    Senior Rigger

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  1. I was subscribed to a number of topics on the old forum and none of those subscriptions were migrated over as followed content on the new site. Is that intentional or an oversight?
  2. mxk

    Vigil service delays

    Anyone know if US-based Vigils are still being sent over to Belgium for maintenance? I was told back in April 2017 that they will soon do all maintenance in Florida.
  3. There don't seem to be many examples of how not cutting away the main first made the situation worse. There are a lot of examples of the opposite. My own rule is that unless there is tension on the main risers, I go straight to reserve. I can't think of a single good reason to do a preemptive cutaway that doesn't have the immediate effect of detaching the main in a somewhat predictable fashion (i.e. there is tension on the risers and you have some idea of the direction in which the main will go when that tension is released).
  4. mxk

    Smart Altimeter

    At my previous job, I spent over a year developing a data collection platform for Tizen, which would stream sensor data to an Android phone. Everything you said is pretty much spot on. To be fair, Gear S2 and S3 added native app support, so you can implement your stuff in C or C++, which I had to do to get access to the more advanced power and sensor APIs. It was still a nightmare though, especially with each firmware update breaking different APIs. So glad that work is behind me now.
  5. I tried corded Moldex, didn't work (couldn't pull the plugs out), and didn't like having the cord. I've been using cordless Moldex Sparkplugs pretty much since finishing AFF during all phases of the jump (except for CRW where I take them out just before exiting). Never had any pressure-related problems. I'd be interested in any stories about situations where hearing under the canopy was directly responsible for avoiding an incident. I'm sure there have been a few cases, but overall I think the benefits of hearing under the canopy are greatly exaggerated, and by no means balance out the damage done during freefall (if you don't opt for the coded solution).
  6. mxk

    Dealing with high shock loading

    The problem we're trying to solve is to prevent an opening shock going above some number of Gs. Tapes and webbing break at a certain number of lbs. For the same limit in lbs, a 5G shock for a heavy jumper would be a 10G shock for someone half the weight. The first one might be ok, the second one might be fatal. An AAD could measure Gs, but the measurement might be delayed or underestimated because the sensor is not attached directly to the MLW. For calibrated tape/webbing solutions, you'd need different breaking strengths for different jumper exit weights, which means many more variations in riser manufacturing. I keep asking UPT to build mini risers with standard rings, but they keep saying no.
  7. Exactly. That would be more of a poised exit. You said Mr. 15K jumps didn't explain why. That makes me think he doesn't have a good reason. All the advice I dispense comes with the reasons why it's "good advice". he said because it was faster to get down to the formation. It seems to me that there might be some truth in this with respect to reaching terminal velocity faster. If you exit in the direction of flight in a head-low attitude, your body effectively becomes a wing at a negative AoA, meaning that the relative wind will be pushing you down. This is particularly noticeable in wingsuiting. With FS, this effect won't last very long as you lose forward speed, but you should still reach terminal velocity a bit faster than if you exit head-low toward the back of the airplane, where you'd experience the opposite effect. Of course, for you to benefit from this, you'd actually have to maintain your heading for a few seconds instead of flying back to your formation, so I'm not sure of an actual net benefit.
  8. I'm not entirely certain of what pattern you were flying, assuming this was at Orange. Left-hand to the east and ended up landing short north of the hangar (next to the parking lot)? If so, then yes, you should have turned much earlier. Regardless of the landing direction, it's a very long field. Some people will land closer to the hangar on one side of the ditch and others closer to the peas, so your target will determine your overall pattern and base turn. There is no way you would have caused any issues for the other two jumpers if you turned just past the ditch while they continued beyond the hangar (that's what the situation sounds like to me, but please correct any wrong assumptions on my part). Trying to avoid others is good, but not at the cost of backing yourself into a corner where you no longer have any outs. That usually means changing your plan earlier rather than waiting to see if the current questionable situation will resolve on its own. Try to anticipate what the others will do and adjust your plan so that you don't end up at the same place at the same altitude at the same time. In your situation that might have meant turning to base earlier, flying a longer base leg, and landing on the south side of the field, or possibly flying a short base leg and extending your final. Especially while you're still learning what your canopy is capable of in different wind conditions, leave yourself extra margin of error for both overshoot and undershoot situations.
  9. mxk

    New AAD made in USA

    That's where even a low-resolution GPS would have been useful. Upload local topology data to the AAD and have it automatically figure out the elevation directly below you regardless of the take off location To answer your question, CYPRES has a dropzone offset adjustment, which is reset after one jump, and an activation altitude adjustment, which is persisted. Vigil has an altitude correction function, which is persisted. If you have only one adjustment, it should be permanent until changed by the user. Adding a one-jump offset might be useful to those doing demos. I've never needed it.
  10. https://www.vigil.aero/wp-content/uploads/PSB-01-2018.pdf Mandatory for all II and 2+ units with affected firmware within the next two years or before the next jump above 27k ft.
  11. Lies, damned lies, and statistics. I'm not sure why this post ended up being so controversial. Wingsuit type should absolutely be reported. Helmet and any other gear should also be reported if it's relevant to the incident. I don't care that G3 is the most popular helmet. If it keeps showing up in head injury incidents, maybe the bad publicity will finally get helmet manufacturers to produce a helmet that actually offers some protection. When a helmet doesn't do it's job, that's relevant information even if everyone is wearing the exact same helmet model. It's not always about comparison with competition.
  12. mxk

    Tony suit or Bev

    Is there any one manufacturer that's known for good bootie construction? I have a Vertical Loose RW suit and the booties started falling apart at the toes after 70 jumps, even though I always take them off under the canopy. I put some reinforcement in those areas myself, which has held up over the last two seasons, but I'm looking for alternatives for my next suit.
  13. He also said that landing out is not an option . And the DZ policy of what to do when someone is landing in the wrong direction was not specified. People are assuming that the policy is to land with the tetrahedron, but that's not stated in the original question. There is a tetrahedron in this scenario, but because you weren't attentive during the DZ briefing, you can't remember what the local policy is. The first person is landing in the opposite direction and you have to make a choice of following them or landing in the correct direction.
  14. I'm changing my answer. If you're #2 and see that #1 is setting up to land in the wrong direction, spiral down and land first. Problem solved.
  15. Why?? That's the real issue here. From what I've seen, that's just how it usually plays out regardless of the what the local DZ policy is. Probably because no policy has been standardized across DZs. As long as everyone follows the same rules, there is no problem. But that's like saying that everyone should just land in the correct direction to begin with and we shouldn't even have any policies of what to do if someone doesn't. Enforcement is what you do after people land and, hopefully, walk away. It also doesn't do anything for visiting skydivers who come from DZs with a different set of rules. Strong enforcement of different rules will not prevent the problem from reoccurring. Until the rules are the same everywhere, the problem will persist.