pchapman

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Everything posted by pchapman

  1. I tried what I guess are some skateboard shoes (DC's) but don't like them --- Seemed to have very little padding to absorb any vertical shock. Just the harder rubber outer sole & an insole. Maybe that's something about keeping feet close to the skateboard without thick shock absorption? So running out a landing on hard ground. Maybe someone with more experience with either skate shoes or using them in skydiving can comment. A bunch of people do use them, but didn't work for me. Maybe I'm just more sensitive to that. Running shoes with flatter soles and no big chunky treads, that worked for me for sliding in, both for Sigma tandems and for swoops.
  2. Yeah not very practical. It just gets complex. (Just like this reply did for me...) In theory if there were a DZ with tons of funding (eg military) you could be lent a reserve canopy set up to use as a main. "You have a Smart 150 in your rig? Well, we have a PD 143 set up here, that would at least be similar." There would be complexities because a reserve doesn't normally have the deployment bag attached. (So you need a specially built reserve, or static lining the jump, or removable deployment system, or someone else chasing the d-bag.) Sometimes there are big boogies where manufacturers bring reserves set up to be tried out as mains, but then you need to be around such a big skydiving event. But if you want to actually cut away from a parachute, then you need a 3rd canopy, a reserve, on the system. You can have the reserve to test in its proper place on your back -- which makes putting a real reserve on your belly more complex, especially to have it fully legal. Or you could have the reserve to test on you belly, which keeps your 'last reserve' in your rig as normal, but then the deployment for the test canopy won't be like a real reserve. Either way, having 3 canopies makes the gear and handles and procedures and crap that your wearing more complex and less suited to a newbie. Maybe more dangerous than a real cutaway after a mal! (There was even a World Champion doing a stunt jump for a commercial about 25 years ago, with 3 canopies, who screwed up the order he pulled stuff and died. An unusual case but 3 canopies does get complex.) And even if you set up everything to cutaway to a reserve to test flying it, there won't be nearly the same stress level as if you were having an actual malfunction. So then ideally you'd at least do something like pop one toggle on the main to get yourself spinning around before cutting away. Reserves do fly a little different than the ZP canopies people are used to today. A small F-111 style canopy will tend to have a shorter, sharper flare motion, not a long gradual flare motion. It used to be that people were used to F-111 style canopies from their student days, but now they don't get that. So I do get a little concerned about newer jumpers these days knowing how to properly flare their reserve. At least people learn that they should do practice flares under their reserve when actually flying it after a malfunction. All in all, it gets complex. So in the sport it is considered reasonable to just spend one's time practicing on the ground. Hanging harnesses are good, handle checks on all jumps are good. And you don't buy a reserve that is way smaller than what you are used to jumping as a main.
  3. You're also adding the drag of the wingsuiter (at what body position?), and it is way down low on the whole canopy & pilot system, which also tends to angle the canopy more nose down. So I think that's a different situation overall; it is about more than just more weight There are unmanned military canopy systems that fly just fine at wing loadings of 5 or 10 without dropping out of the sky. "And now back to your regularly scheduled novice wing loading arguments."
  4. You're also adding the drag of the wingsuiter (at what body position?), and it is way down low on the whole canopy & pilot system, which also tends to angle the canopy more nose down. So I think that's a different situation overall; it is about more than just more weight There are unmanned military canopy systems that fly just fine at wing loadings of 5 or 10 without dropping out of the sky. "And now back to your regularly scheduled novice wing loading arguments."
  5. That's almost troll like over-simplicity, typical right wing thinking that I see so often. "Let's never talk about racism because it could be taken as an excuse, and never talk about the USA's failures because then it makes us sound 100% evil and weak, let's never talk about...[whatever]" Something can exist without being the cause of 100% of all effects. Many factors can affect how things happen. You might as well say, "Let's never talk about workers being sick because then workers can blame any issue they have at work on being sick. It gives an excuse for failure". Sure, someone can be silly and can blame all of their problems on X,Y, or Z, but that doesn't mean X, Y, and Z don't actually exist. Yup, troll... on the level of "If the Jewish Holocaust were real, why are there still Jews around?"
  6. You've had a bunch of crap here Brent but I do find one of your comparisons more interesting: North Carolina (apparently locked down) vs. Tennessee (apparently not locked down) I don't know the actual lockdown conditions; I'm just taking it as you presented it. Tennessee did have a higher peak than NC -- the last big peak for both of them being early in January (presumably from xmas holidays), but Tennessee has indeed brought the cases down by a greater fraction, AND has a slightly lower case load now. (I won't show all the numbers but the two states are #9 and #15 on the list at the moment using Johns Hopkins 7 day average case loads, viewed at this news site: https://www.ctvnews.ca/health/coronavirus/covid-19-in-the-u-s-how-do-canada-s-provinces-rank-against-american-states-1.5051033) So yes Brent -- NC vs. Tennessee is a valid situation to ponder. Both states have a somewhat similar rural/urban population (I looked online), and they are neighboring east-west (which gets rid of some of the 'very different climate' issues with other comparisons), but other details are unknown to me. Also remember that us non-right-wingers do have plenty of issues with lockdowns too, as there are so many variations of both lockdowns and non-lockdowns restrictions and actual behaviour. (E.g., "Why can a giant box store selling some food stay open when a small store that doesn't, has to stay closed?" or "Why are ski slopes closed here but not elsewhere - how bad is the risk outdoors even given that one has to share chairlifts to some extent?" ... with the usual caveats about all indoor places restricting capacity / distancing / not having people lounging around indoors for long periods. )
  7. Yeah that's the quick answer. Especially at a high level, the fundamental question of "what is a license for?" gets even bigger than it is at other levels. Would the E license actually be useful in selecting people for something? (e.g, "You want on this 40 way head down? Oh, you have an E license, great, you're practically automatically selected." That's unlikely to work when skills get so specialized at higher levels.) At lower levels, licenses can be more useful for selecting people. (e.g., "C license or higher for this very tight landing area") Is it about being an expert in at least one thing? Or a broad range of stuff? (e.g., fulfilling at least 10 out of a possible 20 qualifications) Or is it just a sort of a big scavenger hunt for bragging rights? (e.g, "You were world champion in a freefly team? Haha, but you never did a wingsuit jump in your life so you can't qualify as an Expert. I'm an Expert because I've done a bunch of different things including my night CRW water jump using oxygen equipment with gear I rigged myself!") Canada's CSPA used to have an E license until maybe 25 years ago before it was discontinued. While it did cover some useful and broad ranges of experience (like instructing, rigging, being in competitions, and the important-in-the-old-days disciplines of RW and accuracy), it was a bit of a scavenger hunt thing (e.g, 5 water landings), so only a dozen or so people ever got them. They can keep the license but otherwise the license no longer exists.
  8. I’ll join in on the pedantry: I accept that people say things like “1.5 to 1” or write “1.5:1”. Yes we understand what they mean (so their language has worked), but it is a messy way to state things and shouldn’t be encouraged in formal use. It is entirely redundant to say something like “a wing loading of 1.5 to 1” when one could just say “a wing loading of 1.5”. Either way, units are missing and we assume that one is using US standards. It isn’t a true ratio of the same units on both sides of the equation -- you aren’t comparing square feet of one thing to square feet of another thing. The units are different, pounds vs. square feet. Using a ratio in this situation is as dumb as saying that you inflated your car tires to “32:1”.
  9. "Better pick the right day of the week, and hope you get lucky with the statistics" Because I'm seeing 7 day average cases per million, as of Feb 4, of 430 for Florida, and 394 for California. (California = better) But yes the 1 day figures are 359 for Florida and 371 for California. (California = worse) On the other, hand go back 2 days, and you get 490 for Florida on the 2nd of Feb and 465 for California. (California = better) I think the 7 day averages are better than the daily numbers that bounce around a lot. I'd say the two states are doing similarly, with a slight edge for California. (My source was a Canadian news source that used this data: "U.S. data is collected daily from the COVID-19 Data Repository by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. ") I haven't been active in this thread but just wanted to do one of those checks, where you see whether the "other side's" numbers are bullshit or not. Yours aren't a lie, but aren't the best choice, so turn out to be somewhat deceptive. Perhaps inadvertently; but most of us know by know that 7 day averages are generally better measure of trends. Edit: I haven't looked into other factors like length of lockdowns, prior peak case loads (California did have it worse), etc.
  10. There are so many different factors involved, it gets confusing and I don't know the answers either. Some variations: 1. RiggerLee mentioned, "In terms of toggle pressure nose down means lighter toggles and flatter canopies heavier pressure." I can't say how it is in general, but I recall one counter example. Have an old, large F-111 canopy (Titan 265) that I used to use for accuracy. It had high toggle pressure. I added an extra rapide link at each front riser (and even played with using 2 extras), so the canopy trimmed flatter and flew slower. The toggle pressure in turn went DOWN and was more pleasant to work in deep brakes. 2. Sometimes comparing a steep and shallow trimmed canopy is confounded by different styles and sizes of canopy. For example, one doesn't normally get to compare a (non-existent) Katana 280 against a Navigator 280. And is one comparing how much force it takes to pull a front riser down half an inch, or is one thinking of the final effect of pulling a front riser down? After all, even if a small and large canopy have the exact same front riser forces, you might think, "Ugh, this big canopy is a boat, I'm hauling down the front riser and almost nothing is happening", while on the small canopy you whip nearly instantly into a sharp diving turn and even if you need a solid pull, you only need to do it for a second.
  11. But of course you are OK Mr Mullins if some of us individuals out there happen to ask on-topic questions and you provide thoughtful replies! Thanks.
  12. Interesting stuff on the website about the whole issue of 28,000' vs 30,000' and current rules for aircraft. Plus about bringing all the training & gear in house rather than organized by another group as it was years ago. @michaelmullins What is your take on the foreigners using TSO gear, when it comes to gear modifications? You're being strict about that issue, which most places don't. What is your understanding of a situation like this: I for example am a Canadian living in Canada. I jump a rig with harness and reserve that were US made with a TSO. The rig, however, has had rigger modifications to it, legal in Canada, but not done in accordance with the TSO or by FAA riggers. That would invalidate the TSO. That then makes it legal for me to jump in the US, with a non-FAA rigger's pack job? Does your interpretation agree? Indeed, I tell people that if they ever have a problem with a CSPA pack job in the USA, just deface the orange TSO warning label. Voila, no longer a TSOd rig. :-)
  13. I did watch Scott & Bailey. The two women were compelling main characters, although especially in the middle seasons, it was too much of a soap opera, with them always having to deal with some family crisis or something, outside of the detective work. If one liked Silk, one should also look for the slightly earlier "North Square", that dealt with a chamber of criminal lawyers, most trying to climb over the others to greater success, while also dealing with their cases. The show (just 1 season I think) had the same writer and a couple of the same actors.
  14. Good beverage? For a Canadian, a Timmy's coffee box works. Less competition in the morning than with cases of beer around the campfire. Welcome at other DZs? Around where I am, southern Ontario, people might trash talk or slight other DZ's from time to time ('They're too small / too big & impersonal / too casual / too uptight / not well organized' or whatever) , but that's about the overall setup, not the jumpers. Jumpers themselves are welcome all over. So it is common enough for a jumper to be from one DZ but visit friends at another, and then go to a special event at a third, and be welcomed at all.
  15. There's quite a variety out there. I'll include 'mysteries with private investigators' here too, not just ones with police. Season long story arc shows allow better story telling, and get all the attention these days for being quality tv, but I have tended to stick to the 'one set of crimes' per episode shows, so it is the latter that I mention here. British crime shows can also be ones that try to be all modern and super gritty (with the nastiest sexual crimes & worst looking dead bodies), or the ones which try to be more genteel, including the ones that only seem to involve rich people doing each other in while showcasing all the big country mansions of England -- whether in modern times or period pieces from bygone ages, and so on. Vera is a really good show I'd recommend. Plenty of seasons. Still ongoing. Good leading character. One crime per show. Not trying to be super gritty but also staying modern. Father Brown is indeed good. Lighthearted 50s (?) period piece, but engaging, with a good lead character. Midsomer Murders is a little slow paced but decent light entertainment and popular for many seasons. Not gritty, although they do have their bizarre murders to add variety. All small town England, lots of old buildings and big estates. Lewis was good, finished up a few years ago, and was a bit like Midsomer, but I liked it for being a little tighter on the pacing and set in Oxford. Endeavour is good - someone playing the young Inspector Morse, a current show set back in the 60s. It's not just about the murders, but also his life, so there's a bit more of the soap opera compared to shows that don't deal with the characters' lives as much. A couple classics from around the 90s are Inspector Morse, and A Touch of Frost. Typical British shows with good quality, as they only did a small number of shows each of their many seasons. Prime Suspect. Not a lot of shows of the latter, more like specials spread out over many years, but the shows are very well done. Helen Mirren is indeed a good lead. There were plenty of shows from the 80s that took 3 or 4 episodes to finish one crime, and it sometimes seemed like one had to spend an hour learning all the relationships between people before anyone even died. "Somebody PLEASE get murdered and get the investigation started!" I kept thinking. (PD James' Dalgliesh was like that, decent but only if one could stand how long things took. Pacing has definitely picked up over the decades, although the old long shows were able to go into more detail about characters. Campion is also older and slow paced.) The actor in the latter, Peter Davison, was also in the lesser known police detective show, The Last Detective, in the 2000s. Decent investigations with a bit of lighthearted character background added in. A couple shows I didn't like so much are the recent Queens of Mystery and Agatha Raisin. They're in the category of quirky private investigators, and while some were fun, some got too silly. Many of the Agatha Christie's Miss Marple (2000s roughly) were good, but sometimes overly long. Agatha Christie's Poirot was very enjoyable, the one with David Suchet's take on the main character. One of those very engaging quirky characters that makes the watching fun. Earlier seasons were more light hearted, lighter comedic aspects with a bigger cast of characters, while the later seasons were more serious, leaving aside the minor characters. Slightly odd ones with more bizzare plots would be the well liked Luther, or Wire in the Blood ... but it's been a while since I saw them. More gritty, and more likely to deal with some super-genius serial killer over multiple episodes if I recall correctly. Touching Evil had the same lead actor as Wire in the Blood and I think was more straight forward but still gritty. The older DCI Banks was watchable but sometimes the lead character did dumb things and was just generally a little too simplistically angry, although the show later improved. While I watched all the regular Law & Order shows from the US, the Law & Order UK show (that ended some years back) wasn't nearly as good. Decent at times, but a bit too much trying to be over dramatically emotionally caught up with the crimes -- reminding my of the Simpson's meme, "Won't somebody please think of the children!". I'll mention one great show in a slightly different category: Babylon from 2014 or so. t was pretty much a mini series of 8 or so episodes, not a police procedural, but more about the politics and back stabbing at a London police HQ, with various police operations thrown in. I don't know others' tastes, but I found it super intense, fast paced, and absorbing, something the best British political shows are good at. Reminded me a bit of the way the US movie L.A. Confidential had a lot of different stuff going on at once. There are a whole bunch more out there, especially older stuff, but that's enough. Don't know what's on what channel, or where to find older shows now, as I have torrented lots of stuff. Sometimes funny having a huge flat screen TV yet sometimes be watching 404 line 4:3 aspect ratio shows from the 80s...
  16. Nice comparison. To transcribe a few of the numbers as examples: For 135's: Sabre 2 2002 Intermediate 128 lbs Expert 176 lbs Max 216 lbs Sabre 2 2002 Intermediate 149 lbs Expert 216 lbs Max 230 lbs Sabre 3 2020 Intermediate 149 lbs Expert 236 lbs Max 250 lbs FWIW I checked archive.org for PD's 2006 page on the original Sabre ("Sabre 1") which was a slightly less advanced canopy, and indeed had weight ratings typically but not always slightly less than what the Sabre 2 started with. Sabre 1 2006 Intermediate 128 lbs Expert 162 lbs Max 203 lbs I do kind of shrug and just say times change, expectations about jumper skill change over the years, and how conservative a company is with its labelling, is all a factor. (When it comes to "following manufacturers instructions", I have seen the problem that outsiders take manufacturer's info as gospel. E.g., there was a workplace safety investigation in Quebec after a camera flyer died "on the job" when he hooked it low coming back from a long spot. While I don't think it was a huge problem in the end, it was awkward for the DZ when the commission was critical of the facts that were something like, "His licence is considered Intermediate. His wing loading on the main canopy is considered Expert. So why did the company allow him to go to work using unsuitable equipment not approved by the manufacturer?" )
  17. The photo is an example of a novice jumper, not yet quite licenced, who did OK on landing with a one armed flare -- Likely only a partial flare on the big student canopy. She figured out on her own to get her good arm out in front (rather than behind the rear risers) so she could do a symmetrical flare. The brake lines might have a little less drag if pulled from between the risers instead of around the 'outside' of front and rear risers, as this pic seems to show. Although brake lines coming from the inside of the rear risers might then be more likely to scrape across one's neck or something. I haven't tried to see which method is more practical, but in any case she was able to grab both toggles and could do at least a partial flare! (Arm was broken on a 2 way Caravan exit where she was inside, coach outside, and the exit count somehow didn't work out so she got smacked against the door frame.)
  18. Ah, there seems to be a reason for that imperfect memory: He seems to have used a Thunderbow in his 1972 El Cap bandit jump -- the first ski BASE jump -- as opposed to the later Mount Asgard (Canadian arctic) jump for the Bond movie: https://www.tetongravity.com/story/ski/hot-dog-the-legacy-the-story-of-the-first-base-jump-in-ski-history
  19. Thanks. Yeah I was kind of thinking Adobe Flash Player has been disappearing from most browsers. Even Adobe wants its use stopped after Dec 31. Not sure why dropzone.com is still trying to use it, especially with an mp4 file that seems to contain actual MPEG-4 content, unless I'm missing something.
  20. Huh, audio only on Firefox, Chrome, or Edge, on my Windows PC. Not sure what I'm missing. But I could inspect the contents of the web page, copy the .mp4's actual location on the dropzone site, load that into a browser on its own (still fails to play video), and 'download page' to download the mp4. Worked fine once the mp4 was on my drive. This is the direct link to the file: https://www.dropzone.com/uploads/monthly_2020_11/1205120192_Firstsolojumpcopy2.mp4.eb8b4129e1060b5ec8b18df5798165ed.mp4
  21. My analogy to this situation (where wording was surely deliberately chosen to be misleading): White House releases Pearl Harbour accomplishments Highlights include: - Ending World War II We have taken decisive action to understand, engage, and defeat the enemy. - .... etc
  22. I noticed that the USPA SIM does have a detailed description of a PLF. It isn't perfect, but at least does put a lot of detail into the roll. It doesn't however get into differences between low and high horizontal speed for example. It just mentions leaning into the direction of the landing (whatever direction that may be - not necessarily forward or straight down). So the legs would always be slightly 'back' of vertical, with no rules about how to deal with cases with more speed -- where people might have legs out in 'front'. E.g. - if one is going forward, and about to hit at a 45 degree angle from the vertical, then: a) the classic PLF instructions would have you trail legs slightly BEHIND you. Giving you very little support going into the PLF! -- You would pretty much catch the feet on the ground and then body slam the ground. Ok, that's exaggerating somewhat. Classic PLF may still work as that angle is similar to round canopy jumps with a lot of wind. But as the horizontal speed increases and the angle of arrival is closer towards the horizon, this situation (a) becomes more true. b) But it would also be bad to have legs out 45 degrees in front relative to your center of mass, as that would pile drive you into the ground when moving at that 45 degree descent. Impact point with feet are directly in line with your motion and center of mass. c) So you would want legs out in front a little, to absorb some impact and slow down a bit, but with the center of mass then going 'over' your legs to enter a roll. d) It would be overdoing things to have legs up higher than 45 degrees from center of mass, as that would tend to make you slide but also pitch butt down, and smack pelvis & spine into the ground. So on the one hand the SIM does go into more detail than the 'classic 1960s round canopy' sort of diagram (that you show), but it doesn't get into all the modern issues (that you were concerned about when starting the thread). This kind of stuff is good for making one's own thoughts on a subject clearer and better organized! My sketch could be clearer but shows a few of the points above:
  23. PLF still makes sense at the novice level, and that's the level that is normally taught in skydiving for nearly everything. At a more advanced level, that's where in skydiving we have generally had to learn much more on our own. And people now are taking more and more canopy control classes, whether enforced at the intermediate level (depending on jurisdiction), or for learning swooping a little further down the road. I don't know what other coaches have done, but when I've taught canopy classes for those just getting into faster canopies, all those other variations on landing do come up: All the stuff about how if you aren't going to run out a landing, you can slide, but there are all sorts of things to be aware of relating to protecting the spine, foot position, roughness of the ground, and so on. I can't recall exactly what they do in judo or parkour, but I think one sees rolls that are a little more of a 'forward roll', although still twisted to the side. That might work if one is flexible with no gear on, and with certain softer surfaces and with certain moderate speeds. Worth looking at but I doubt anything is going to greatly change skydiving landing rolls. As an example of a situation where both sliding and PLF can work together: A low slide, one butt cheek on the ground, can be good for scrubbing off speed if the ground is smooth. But if you might hit an obstacle, say a rock, dirt ridge, or stump in some higher grass, then it would be better to slide with the feet but keeping one's torso off the ground, and the center of gravity higher, so that if one hits something, one can at least get thrown forward into some sort of roll, instead of piling straight into the obstacle. PLF is still great for vertical speed, sliding is great for horizontal speed if the surface is smooth, and for everything in between, it gets a little more complicated, but the PLF is still the first thing you want to have in your toolbag. I think this PLF topic falls less into the category of "what's wrong with the PLF", than "how do we keep educating skydivers on more advanced knowledge, after they are licensed and are no longer students".
  24. Skydive Niagara in Ontario Canada has been operating one for many years now. Have been there but don't know anything about how well it is working out for them. http://www.niagaraskydive.com/ Go Skydive in Quebec by Ottawa used to run 1 or 2 Navajos, but has now transitioned to Caravans as their big planes -- So they might be a good place to ask, both because of language and because they can give a more unbiased opinion if they no longer use a Navajo! goskydive.ca
  25. Unfortunately I don't have the link, but somewhere I recently saw a video where some jumpers (speaking Spanish?) were testing hook knives on tandem bridles, tensioned somewhat with one person at each side pulling the bridle. While the cheapest plastic knife had issues, any of the decent knives (Jack, Benchmade I think) cut the tandem bridles with no problem, with one easy slice. Impressive.