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    Icarus Spain X-Fire
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    Precision Aerodynamics Raven
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    Cypres 2

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    Skydive Feniks, Belgrade, Serbia
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  1. As far as I've managed to follow, 7 and 8 have the exact same sensor. The major difference is, yet again, more RAM and with that better stabilization (and the obvious physical design/appearance differences you've mentioned). I'd say "better video quality" comes from GoPro's fancy colormaps which amplify color saturation to make videos look more vivid. You could always do this manually during editing, probably do even better job. Stabilization on 7 is already very good in my opinion. You can find many comparison videos on YT to actually see the difference in image and stabilization.
  2. @Maddingo First, a disclaimer, I have ~250 jumps so nowhere near competent to provide any strong opinions. However, I have had a coach for proximity flying and have been flying along those lines with two of my friends (so the 3 of us in flock), so I'll share some of the things we were taught and found useful, but take it all with a bit of salt :) Revise your EPs including wraps and entanglements (e.g. Both of you keep a knife or two or more on you (as the joke says, the second one is for you to use after you drop your first one :)). Depending on the size of the plane and the DZ, make sure to plan accordingly with other people as you'll most likely be hogging the airspace a bit longer than the others. The three of us jump hop n pops with 3 seconds of separation. We started with 5 seconds until we got used to it. So all of us deploy right away, but we make some slight horizontal separation. Depending on the plane (we jump mostly from C-182), it can be useful that the next person is basically already outside of the plane with their feet out at least when the first one jumps (to save time). When your canopy deploys, hold the rears and be ready to avoid any unintentional docking :) As you have some stuff to do before the flying starts (disconnect RSL, loosen the chest strap, pull down the slider, whatever you do) first turn 90 degrees from the flight direction for safety and then do all that stuff. Decide with your partner that you both turn the same direction (both 90 left, or both 90 right). This will save you time later as you'll be closer to each other once you're both ready. We usually do one of the two formations, either stack (2nd flying a bit above and behind the 1st, the 3rd flying a bit above and behind the 2nd) or side-by-side (the 1st in the center, 2nd on one side of the 1st, 3rd on the other side of the 1st). The leader (1st) always announces the intent with their legs (if they're going to turn left or right) and executes a second or two afterwards so that everyone can coordinate properly. In the stack, watch out for the turbulence of the canopy in front of you (the turbulence on the sides seems to be much stronger and will push you out of the formation). In side-by-side, if you get very close, the close parts of the canopies will slow down and will begin to turn the canopies into each other. So if you're getting significantly close, be sure to watch out for this. Fly slightly braked (toggles around neck/ears). If you're both flying in full speed, the faster one (or the one in front) can slow down, but the one behind cannot speed up. If you cannot catch up to the one in front of you, cutting the corners during turns can help. This is why announcing turns is important. Discuss leg signals for announcing turns, as well as "slow down"/"speed up" and "separate". What we found really useful is bluetooth communicators. We use Lexin LX-B4FM. It lets you try a bit of more stuff and still stay safe, as you can announce the intent or problems more clearly. Watch out for other traffic and for each other. If you're using communicators, we found it useful to announce the altitude from time to time. We usually fly the formation down to the landing, trying to all land in a line at the same time. Swap positions (we usually keep the same ones in a single day) so you don't get used to and overfit to a single position. It's useful that one person does nothing (just flies mostly straight), and the other one tries out different things to see how it affects their flight (front risers, rear risers, toggles, sashay...). I hope you find all of this at least somewhat useful. And again, please take this with a bit of salt and ideally discuss with someone more experienced :) P. S. Sorry I forgot to address some of the specific questions you had. 0.2 WL difference isn't significant if they're same/similar canopy model (you can fly with that, I did). A katana will dive deeper than a safire so you'll have significantly different paths even on the same WL. As for the turn you described, I didn't fully understand it. What we usually do is fly a pattern (like large rectangles) while we're up. The leader plans for those and decides when we turn. After you get a bit used to flying proximity, you can try adding different things like swapping positions in air for example.
  3. Unfortunately, accidents can and will happen, and with that in mind, I really don't think that any canopy will guarantee you a consistent soft landing as you can always either flare too low and hit the ground with somewhat higher speed, or flare high, have the canopy go through the cycle and dive into the ground. What you should definitely learn I guess is PLF (parachute landing fall) which will save you from injuries until you learn to flare and land properly. Specifically about these canopies, I have only tried Spectre for a few jumps, though loaded a bit higher than what you're aiming for (170ft at ~98kg) and I must say, it was more difficult for me to land it than Safire 2 of the same size. It could be just that specific canopy (though lines were pretty new), or my technique, but it had to be flared more precisely, and wouldn't flatten out that easily on the landing. There's lots of canopies which are considered conservative, like PD Silhouette and Aerodyne Pilot for example, but I think the top priority for you is to learn to PLF, keep jumping and learn proper landing technique. Of course, if you haven't, talk about this in detail with your instructors :)
  4. I'm also interested in this. Did you check with Aerodyne for this one (is it something they consider okay) or you just tried it yourself? Any chance it could become a streamer because of that?
  5. Sure, send me your email and I can share. I've also written an app myself so I can share some of the troublesome details (like converting pressure to altitude). Edit: Actually, I've pushed the code to this repo: I pretty much gave up on it (it was made out of boredom). Feel free to contribute, copy, derive from, do whatever you want :) The pressure/altitude conversion is in ProtrackParser/DevicesDatabase.cs function at the bottom (PressureToAltitude).
  6. In Serbia: Students are required to jump at least 5x FS2 (allowed only with instructor or a coach) in order to qualify for the A license exam. A license holders - the biggest they're allowed to jump is FS4 with a limit that at most 2 A license holders are in the formation and that at least one of them is an instructor or a coach. This is all on paper, in reality it's more free style, a case-by-case triage based on the level of skill and experience of all participants.
  7. Completely unaware of what exactly the app does (just heard of it) and the nature of the project (free/open source/commercial) but I'd love to contribute if possible (electrical engineering + signal processing + machine learning background). Will send the data regardless :)
  8. It's fairly simple to check the order. Have a friend spread out the canopy, you stand near the slinks, take one of the lines from a slink and pull it to see where it attaches to the canopy. The ones on the outside of the riser should be attached to the outside of the canopy (the order of the lines on a slink should be the same as the order they are attached to the canopy). As for making a difference, I don't know the magnitude (I assume it would if nothing introduce friction of the lines) but not really sure why you wouldn't have this fixed whatever the difference it makes (it should be attached the way it's supposed to be attached). As for twists in the lines you can check it the same way you untwist your toggle lines.
  9. Just to make sure I don't misunderstand, I guess you wouldn't want one of your cells left somewhere inside so you do hold them between your legs up until cocooning exactly for that reason, right? This also confused me, could you explain? (if there was some sarcasm involved, sorry for missing it [also new here :)])
  10. I think you'll mostly find two types of persons: one wanting all of the flashy features and infinite customization, and one wanting a device that's predictable, simple and doesn't require a lot of maintenance. I happen to belong in the second category. If it's usb rechargable I instanly think of "another thing to keep track of", "how fast's battery life gonna degrade, after how many recharge cycles", etc. Bluetooth? - "Way too complex system now for it to be bug-free". With such a mindset, I use protrack, so I can tell you the nitpick stuff I have with it. I bought it to use it as a logbook, but it sometimes (often) fails to register hop n pop jumps - really not sure how that's possible but they somehow manage to fail at that. And because it's not working all the time, I just gave up and don't even look at the data anymore. Speed profile is nice to have, but because it's not trivial to correlate it with the video, I end up not using it ever at all, even though I made an effort to make my own graphing app to customize it to my needs (don't really like Paralog). It should be trivial and fast to read the jump data, not sure why you have to perform access sequence to read the data. Even if you enter the plane and start climbing it could just force quit that screen (lock itself). That's mostly it, bottom line is, all this stuff is nitpicky, but priority 0 is of course that it beeps for the breakoff, for the deployment altitude and on the hard deck if you're in high speed.
  11. In the Parachute Rigger Handbook is the following image. I'm not 100% sure but I think I saw the yellow 3-ring cables as pins for the static line. Is this something that's okay or something that should be strongly avoided? (I'm not a rigger, just trying to learn) Thanks!
  12. Wrong orientation causing the distortion in the plastic can hypothetically explain it I guess (though I agree, I would expect the jumper to rotate and eventually release the closing loop). I agree with both the procedure (waiting for the cutting before the reserve) and the hook knife (being "standard piece of equipment"), there's lots of should've-could'ves here. But what I'm mostly interested in is, aside from closing the rig from the wrong side (with respect to the plane door orientation), are you aware of any other don'ts one should be aware of while packing and checking the equipment to make sure this doesn't happen? As a side note, it's weird that the static line didn't brake in this concrete occurence because we can't see the main canopy and even though the video is low quality, I'd expect it to be visible.
  13. Hi, Just saw this clip of a student hanging on the static line. I'm very interested in all the reasons how this may happen? What are all the things you can do in packing to have this happen? (I'd like to focus my question completely on the packing issues rather than emergency procedures and the insane amount of luck these folks had) Also, the static line appears to have broken (as we can't see the main canopy), are there any standards for this (that the lines are made to break at some point at some force on purpose)?
  14. Skydive Bovec in Slovenia (basically on a border with Italy) has a great scenery and there's wingsuiters most of the times I'm there. It's a PC6, not a helicopter though.