Friday, August 27, 2021

Paragliding Maneuvers Clinic (aka "SIV clinic")

This past weekend, I did a paragliding maneuvers clinic (aka "SIV clinic"), simulating incidents that can occur during flight, and learning to handle them. The gist is simple: you get towed by a boat over a lake, get to about 2,500ft above the water, release the tow line, and then listen to the instructor (who's watching you from ground level) walk you through maneuvers over the walkie-talkies strapped to your shoulders. In my particular case, the instructor was Matty Senior, a New Zealander with an Australian accent and one of Washington's best pilots. "Alright mate, now we're going to induce a collapse on the left side, so go ahead and pull on the left A risers. Yep, there you go. Now shift right to control the heading, then apply right brake to enter a low-g spiral. Keep applying, keep applying. Well done, mate. Let's do a full 360, then exit the spiral by releasing the brake, then releasing the collapse, and then take that wing's energy into a turn into the same direction to prevent a surge. Nicely done. Now let's do it in the opposite direction."

Ten minutes to tow, then 3-4 minutes of maneuvers (you're inducing collapses, stalls, spirals, and spins, so they burn through altitude pretty fast), then another 5-15 minutes of ridge soaring by the beach if the wind conditions allow... and you're back on the ground, watching the other five people in the group take their turn. Three runs on Saturday, three runs on Sunday – and you've got yourself a weekend SIV clinic. I was reminded of the phrase "long periods of boredom punctuated by moments of sheer terror," which apparently is a war adage, whereas this was a strictly voluntary activity – and in any case, the boredom wasn't long and the terror wasn't sheer. Never-the-less, there's definitely an interesting rhythm to the SIV exercise...

Matty gave us an excellent hour-long briefing before the start, but by the time we got to the boat, unpacked everything, and got going, I'll admit that I forgot a good chunk of it. Most crucially, I forgot how/when to release the tow line, so my first tow was quite the experience. Relative to normal launching, towing is a weird experience, as you have to keep making course adjustments to keep the tow line taut when the boat turns. I was so focused on watching the boat and making adjustment on my first tow, that it was quite unexpected when I realized that I was about to go into the clouds, which were fairly low that morning. Due to a problem with my radios, I couldn't make out what the boat operator was telling me to do, but I definitely wanted to remain tethered to something as I got engulfed in whiteness all around. I've never been in the clouds before, but I've heard the horror stories of going into the "white room." By remaining tethered, I at least wouldn't be lost flying around in circles or heading into the mountainous terrain nearby (it's very easy to get disoriented, and for the SIV course I didn't have the instruments that I usually fly with), and I wouldn't get sucked higher into the clouds. Engulfed in the dense white fog, I gave a nice pep talk to my wing, and we eventually emerged out the side of the cloud. By that point, the boat had stopped, and I was beginning to overshoot it, and the tow line was tugging awkwardly at me from the wrong angle. The situation didn't feel sustainable, and there were more clouds coming up, so I let go of the brakes, yanked on what I rightly guessed to be the release handle, and was back under my own control right as I heard Matty's voice come quietly on the radio to encourage me to do just that. Matty's voice transmitted louder than the boat driver's, so I was able to execute a few simple maneuvers (collapses and spirals) on that first run – and we corrected the volume issue for the subsequent runs.

Observations and lessons learned:
  1. If in doubt, speak up. I thought the volume felt quiet even before takeoff, and should have double-checked that while still on the ground.

  2. Once I got used to it, and when I wasn't going into the clouds, towing was sort of fun – a slightly surreal experience that reminded me of my tandem-passenger experience with my brother (maybe because you don't have control over the direction, and so you're basically there for the ride like a passenger, when the boat is going straight?).

  3. For the types of wings that all of us had (beginner wings, A-s or B-s), that wing just wants to fly. It wants to recover from collapses, it wants to fly straight, and it can recover from just about anything, provided that you have enough ground clearance for it to do its thing. I feel like the SIV really reset my feeling for what bad turbulence is, and what my wing can handle. If there's one thing I learned this weekend, it's that – while its pilot is still a work in progress – my wing is rock solid!

  4. Spirals were intense, especially the first few times (and I'm glad I got to experience them twice before when flying tandem, once with my brother and once with Matty a few months ago). But they were also kind of fun. Apparently, you can remove some of that intensity by doing do a low-g spiral by collapsing the outside portion of the wing. In practice, I'm not sure I could tell the difference (but maybe I would after more revolutions – I was exiting my spirals after a max of 2 revolutions to not burn up too much altitude).

  5. The B-line stall was fun, and felt like doing a pullup on my wing. It felt very mellow. Full stalls, on the other hand, felt like chaos – the wing flapping like crazy overhead. Finding the backfly (tailslide) position was cool, but coming out of it symmetrically wasn't easy. Out of the dozen stalls that I did, on at least two instances I came out spinning, under no control whatsoever – and was basically relying on either the wing to do its thing or for Matty to tell me what to do. Spinning was super disorienting, and I considered throwing the reserve if the spinning wouldn't stop within a few seconds, though I thankfully regained control soon (not sure whether through my efforts or not).
    • If I understood it correctly, the trick to doing it right is to release the backfly just a bit (and symmetrically!), while looking up at the wing. At that point the wing will surge forward. Then apply the brakes before the wing surges too far ahead, and again, make sure that everything is symmetric.
    • If it's NOT symmetric, you can just re-stall the wing. A stall is a reset button after all, and will stop the spinning. By the time we talked about this after my run, it was time to start other maneuvers so I didn't have a chance to try it out.
    • Along the same lines, something that wasn't obvious to me, but that another fellow classmate explained to me: if you're spinning, you want to apply brake to the outside to slow it down. I.e., if you're spinning to the right (clockwise), apply left brake to get that side to slow down, and you won't be spinning anymore! Again, didn't get a chance to practice it, but it seems obvious when put that way.

  6. I did get very good at clearing cravattes, which I got after half my stalls. Pumping the brakes works for small cravattes, but for larger ones I found that the only way I could get them out was by pulling the same-side stabilo line.
    • If I understood correctly, the trick to avoiding the cravattes in the first place after a stall is to semi-aggressively pull the brakes after releasing the backfly (or at least to maintain good pressure?). Without enough pressure, the wing tips get tucked under and then require clearing.

  7. I could not get the hang of an asymmetric spiral (though it meant I basically practiced exiting the spiral over and over again). If I understood correctly, the idea was to start with a regular spiral and then weight-shift to the other side while exiting. It sounded like I was a little late with my weight-shift and/or my exit. Matty said that the asymmetric spirals are a great way to build up to wingovers (and, in his mind, are the safer way to approach wingovers), so I would like to learn this eventually... but it may have to wait till I do another SIV.

Though each run of maneuvers was just a handful of minutes, both days felt quite long and I learned a lot – both during my own flying and when watching the others. Driving back from Riffe Lake, I felt nicely satiated. But, writing this report four days later, I'm already excited about doing another SIV (I was initially thinking that I can wait another couple years... but maybe next year?). And I'm looking forward to doing some regular non-maneuver-y flying this weekend.

Thanks, Matty, for the excellent coaching, and to Kevin Stone & Maggie Johnescu for the excellent video footage!

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