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Everything posted by billvon

  1. billvon

    Canopy transition for downsizing

    If the rears are going slack, then you are _definitely_ changing the canopy's trim.
  2. billvon

    USPA Board Meeting

    If the S+TA was there. If the S+TA knew what happened. If the DZ has an S+TA. If not, you'd need the people involved to report it.
  3. I will start with two minor notes from posters: 1) No way to chronologically order search results 2) No way to post a poll
  4. billvon

    USPA Board Meeting

    >Please let me know how you would interpret this new BSR. You have to send a report to USPA if anyone's AAD fires during a student jump.
  5. billvon

    Great beginner canopy for new A license jumper?

    I guess no (significant) holes is a good criteria, although I figured that would be somewhat of a given . . . I'd also suggest checking canopy trim on any Spectra line canopy. An out of trim canopy can fly very poorly and be hard to land, and a reline is relatively cheap. A quick and dirty way to check is to start packing and compare length of the D lines. They should all be the same on most canopies (you can check the line length docs if you're not sure; many of them are on line lately.) If there's more than a few inches of difference it might be a good idea to replace the lines first.
  6. billvon

    How to sight in a ringsight

    I got a laser pointer and mounted it in line with the camera, so that the dot is dead center when the camera is focused on something ~10 feet away. Then before I get in the plane I turn on the laser and just make sure it is hitting the center of what I see in the ringsight.
  7. billvon

    Dropzone Site Launch & Bugs Megathread

    Two notes: 1) Unable to edit post after a few minutes (bug) 2) Unable to easily tell quoted text from body of message (probably a 'feature')
  8. billvon

    EPs: Look up before pulling reserve?

    Depends on the method. That might work for one hand per handle, but would be dangerous on the two hands per handle method.
  9. billvon

    BOD Meeting July 2018

    I am certain if some tech-savvy skydiver showed up at a BOD meeting and said "let me set up streaming for you" they'd be all over it. Any volunteers?
  10. >In fact, if you can prove that a patent is insufficient for someone "skill in the art" to >replicate the invention, you can have the patent invalidated. Yes, that's the theory. In practice, companies put as little detail as possible in the patent. They do this because if they DID put enough detail in it to easily reproduce the invention, China would be building them within a few weeks. And yes, you might be able to have it invalidated if you challenged it. It would, however, be a long court case, with one panel of "skilled in the art" folks claiming they could not have duplicated it, and another panel of "skilled in the art" folks claiming they COULD duplicate it. The folks that claim they could duplicate it, of course, often base their learnings on a reverse-engineered product rather than the patent itself, so the defense will claim that's how they got their knowledge. 11 months and 7 million dollars later, you might indeed be able to invalidate the patent. Most people don't have 7 million dollars and 11 months, which is why such patents are often as general as possible. That's one of the reasons that patenting things is beginning to not be the primary way to protect IP. Indeed, if it's something that's a combination of microcode and ASIC design (i.e. very hard to reverse engineer) often companies don't even bother any more. They rely on the difficulty of the reverse engineering process to protect them - by the time the competition reverse engineers the product, they are on to their next generation.
  11. billvon

    hard openings dome slider?

    >To all: Does anyone know someone who has installed a larger slider on a Sabre 2? Nope. I went through a lot of funky sliders for a few Sabre 1's (dome slider, pocket slider, bigger slider) but I've never seen one on a Sabre 2 or its relations by other manufacturers (Safire, Pilot.)
  12. billvon

    EPs: Look up before pulling reserve?

    >How does a reserve not fully inflate? All the same ways a main doesn't fully inflate. Tension knots. Lineover. Massive line twist. Canopy damage.
  13. billvon

    BOD Meeting July 2018

    >It may not be easy to set up initially, but once established will more than justify >the time and money spent on it. Go for it! I am certain the BOD would welcome your assistance.
  14. >It is my understanding that you can make them & give them away for free without >violating the patent. Legally, no. Practically, yes. =========== 35 U.S. Code § 271 - Infringement of patent US Code (a) Except as otherwise provided in this title, whoever without authority makes, uses, offers to sell, or sells any patented invention, within the United States or imports into the United States any patented invention during the term of the patent therefor, infringes the patent. (b) Whoever actively induces infringement of a patent shall be liable as an infringer. ===========
  15. Not in the US. In fact, in general patents are written to be as general as possible, with none of the detail that would allow you to copy a product using the concept embodied in the patent. That's on purpose. Well, the purpose of a patent here is to allow the inventor to control his invention for a short time, specifically to monetize it (i.e. make money on it.) Specifically the purpose is "to promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries." But yes, patents do get copied, and a patent is indeed a record of the basic concept that can be used for that purpose. (Which is why patents are becoming a problem nowadays, because it's essentially an invitation for a country without patent protection to try to duplicate it.) It is illegal to use a patent in that way in the US. However, you can almost always get away with it, because the license holder isn't going to care if you build something small for your own personal use, because they aren't going to lose any money over it. That may be changing with the advent of 3D printing and rapid prototyping, because now if you post a 3d printer file to build a widget, and a million people download it, the license holder CAN lose money from lost unfulfilled demand - and a court would likely agree. Also, in the US at least, a patent is effectively just the right to sue. No police force monitors the use of technology, so the license holder has to notice you using their IP before it even becomes an issue.
  16. billvon

    182 engine failures

    What do you think would motivate a DZO to do more maintenance? 1) The FAA coming over and informing them of the FAR's they broke, and that they would come back if it's not fixed, fine them six figures and ground their fleet, or 2) The FAA coming over, noting they broke some FAR's, fining them six figures and grounding their fleet? If you were a DZO, which one would ensure you were out there the next day getting your fleet up to spec?
  17. >Unfortunately, there's a big difference between unskilled me and a skilled worker in Vietnam >who gets $5 for 16-hour workday and can make two complete $2K suits in a day. Last time I was in Thailand a few other skydivers found a local tailor willing to try to duplicate a Tony suit. The first one had the grippers on the front of the arms. And it looked like it fit pretty well while standing up - but you couldn't arch in it. And the lycra, while it looked good, was more akin to the sort of lycra you see in cheap bike shorts rather than the thicker lycra that jumpsuits use. But it was pretty cheap. I am sure if you iterated that 10x (and did some work on sourcing etc) you'd get something very close to a Tony suit. If that's worth it to you, then that might work.
  18. >I do think that the manufacturers are ripping us off selling suits for $2K. It will be very interesting to see what your opinion is after you try to do that for yourself.
  19. billvon

    BOD Meeting July 2018

    Yes. I paid it. Not the people I coached, not USPA. Nope. That's why I left out Kate Cooper, Tony Domenico, Pat McGowan, Chris Farina etc. The people I listed gave me free coaching (actually, some of them paid _me._) Now you're starting to get it. USPA has a charter to train the US team. It does not have a charter to pay for it. If USPA gets Dan BC to coach them then they've done their job per the charter. Someone has to pick up the tab - and in that case it would probably be BC, knowing him (and knowing past US teams.)
  20. billvon

    Easiest Stability Exits

    >I only know that I am jumping a Caravan. Forgive me if there are many different types of Caravan. Doors are all similar. Yeah, poised exit facing forward, put your hips on the gear is going to probably be the easiest exit. >For a diving position, do I twist my shoulders to or away from the wind? Don't think about twisting. Think about putting your whole body where you want it. For diving exits, think about once again putting your hips on the landing gear. (Harder because you can't see it.) You want to go out with your head lower than your feet, _without_ any twists or contortions - pelvis out, chest out, legs back, feet on your butt (at first.) As soon as you feel stable extend them to a normal freefall position to prevent backsliding.
  21. billvon

    Easiest Stability Exits

    >Lastly, I tried a pivot to face the wind. That can backfire, because it makes you think you should go out while spinning (pivoting.) What I try to tell people is to step out in the position you want to be in - and hold it. In other words, step out, get into the body position you want to be in, and hold it there without rotation. Do the same thing you would do if you stepped off a diving board and entered the water without any rotation. As to body position, if you are in an aircraft with a visible (low) landing gear, try to put your pelvis on that. On an Otter, try to hit the left main gear with your pelvis - that puts you into a good position. (Do this only with your body position, not by flinging yourself forward.) Everything proceeds from that. For a diving exit you are going to want to try to put your body in the right position and stop - but facing down this time. Same basic position.
  22. billvon

    BOD Meeting July 2018

    >And an individual giving free advice is not the same as a mandate from an organization to >provide training. Well, let's see: I've given free training, and have gotten a lot of free training myself Director of the competition committee says they're not paying for it I think it's safe to say that your concern is unfounded. Doubly so, since you're not a member any more, and this is simply no longer your concern.
  23. billvon

    BOD Meeting July 2018

    >Try to give an example of where providing training in skydiving does not require >spending any money. The training I gave people in Tent 4 at Quincy. The training I gave to people at water training courses in San Diego. The training I got from Dan BC, Christy Frikken, John Eagle, Craig Girard, Mick Cottle, Dan Campos, Craig O'Brien, Hannah Betts, Mad John, Uli and Hammo. I am amazed you have never considered the training you got for free - and would be amazed if you have never done the same for someone else. >Tunnel? Money >Jumps? Money >Gear? Money You pay for all of those yourself. That's not the same as training. It's just stuff you need to make that training worthwhile.
  24. billvon

    BOD Meeting July 2018

    >>Note that it says nothing about funding. >Notice it says TRAIN? Yes it does. Train != fund.
  25. billvon

    BOD Meeting July 2018

    Of course you can have one without the other. It's just harder. If you want to "go it alone" and design your own training programs, competitions, BSR's, guidelines for demos/high altitude jumps, get recognition from the FAA etc great. It's very hard to do, and I know of only one organization to have done it - the WSA, which was the product of Roger Nelson and DD Bartley. (And I don't think they ever got USPA recognition.) I can think of perhaps a handful of other people in the country capable of doing something like that. However, for the average DZO, he is going to end up with a DZ (and body of skydivers who jump there) that is a lot safer overall by following USPA syllabi, rules, recommendations and progressions.