Paragliding Reserve Parachute: When It Saves You

A paragliding reserve parachute is the backup canopy every pilot carries for the one situation the main wing can't recover from — a spin, a cravat, or a collapse too low to fly out of. It isn't a substitute for good decisions, and throwing it isn't something to figure out mid-emergency: the decision and the motion both come from training, specifically an SIV (simulated incidents) course, long before you'd ever need either.

When do pilots actually decide to throw?

The honest pattern from accident data is hesitation, not haste: pilots throw too late far more often than too early, because the decision competes with disbelief and the hope that the wing will still recover. France's FFVL treats a reserve that stayed in its container as an aggravating factor in several fatal accidents most years — not because the equipment failed, but because it was never used. The trigger is a main canopy a pilot can't fly out of before the ground arrives: an unrecoverable spin, a cravat that won't clear, or any collapse with too little height left to try normal piloting first. None of that is a technique to learn from an article — it's exactly what an SIV course trains the body and the decision to do together, under a real canopy, with an instructor and a boat below. FFVL's own reserve guidance points every pilot toward exactly that kind of training rather than a written procedure.

Why does hesitation happen even to trained pilots?

Because a collapse or spin is disorienting by design — the horizon moves wrong, the harness swings, and the brain's default response is to keep flying the wing that's misbehaving rather than commit to losing it entirely. FFVL's own guidance to pilots is blunt about this: after a serious asymmetry or a full twist ("tour"), the safer default is reserve, not another attempt to recover the main. Pilots who've felt a reserve open once — in training, not in an emergency — consistently deploy sooner when it counts, which is the entire argument for taking an SIV course rather than reading about one.

Round, square, or steerable — does the type matter?

Yes, and the trade-off is real, not marketing. All three types are certified under EN 12491, Europe's reserve-parachute standard, which caps how fast you're allowed to fall and how reliably the canopy has to open.

Type	Descent rate ceiling	Handling	Best for
Round	5.5 m/s (EN 12491)	Simplest, most pendulum-stable, fastest to certify-open	New pilots, budget-conscious kits
Square / cross	~5.0 m/s typical	Less pendulum swing than round, similar simplicity	Pilots wanting a stability upgrade without steering
Steerable (Rogallo)	4.4 m/s (EN 12491 steerable class)	Can be flown toward clearer ground; needs 50–80 m minimum altitude to open cleanly	Experienced pilots flying over terrain, water, or trees

Germany's older LTF standard permits a looser 6.8 m/s ceiling on some certified models still in circulation, which is one more reason to check a reserve's actual certification and descent rate rather than assume "certified" means "fast" or "slow." A steerable reserve's lower sink rate sounds like a strict upgrade until you factor in the extra altitude it needs to inflate — over a low collapse, that difference can matter more than the sink rate itself.

None of the three types is universally "correct." A new pilot flying low, slow ridge sites is usually better served by a simple round or square reserve that opens fast with no steering to learn — the extra altitude a steerable model needs to inflate properly works against exactly the low-save scenario a beginner is most likely to face. Pilots flying cross-country over forests, water or built-up terrain are the ones who most benefit from a steerable canopy's ability to be flown toward a clearer landing, because for them the collapse is more likely to happen with altitude to spare. A good instructor or reserve retailer will ask about your flying, not just your weight, before recommending a type.

What size reserve do you actually need?

Enough margin below the manufacturer's maximum weight rating that sink rate stays near its certified number, not creeping toward it. Reserve sizing is based on total suspended weight — your body weight plus wing, harness, pack, and whatever you're carrying, typically 15–20 kg over your bare body weight. A common rule of thumb: take your all-up weight and divide by roughly 0.85 to 0.90 to find the reserve's target maximum rating, then buy that size or the one above it. The reason margin matters is that sink rate doesn't rise in a straight line as you approach a reserve's weight limit — it climbs faster near the top of its range, and landing forces above roughly 6.5 m/s cause serious injury regardless of how well you land. A reserve that's technically rated for your weight but with no margin left is a worse choice than the next size up, even though it packs bigger and costs a little more.

How often does a reserve need repacking — and does it actually matter?

Every 6 to 12 months, per the manufacturer's own manual — and yes, it matters more than most pilots assume. A folded reserve sits under constant light compression, and fabric and lines both age in storage even with zero flights on the canopy. DHV's own durability testing found that roughly a third of tested rescue canopies failed the standard opening shock test after just 18 months in storage — not from use, from sitting folded. That's the entire reason the interval exists: a reserve that would have opened fine on day one can fail the same test a year and a half later if it's never been repacked and re-inspected.

What actually damages a reserve between repacks?

Moisture, heat, and constant folding pressure — not flying. A reserve that never leaves its container for a year of flights ages the same as one flown every weekend, because the fabric and lines degrade from being compressed in one shape, not from wind load. Packing it away wet after a rainy landing is the single most common avoidable mistake: damp nylon left folded for weeks encourages the kind of fabric breakdown the DHV shock test is designed to catch. Storing a harness in a hot car boot all summer does the same thing more slowly. None of this is a reason to skip flying with a reserve past its repack date "just this once" — it's the reason the repack date exists, and why a repack includes airing the canopy out and re-inspecting the fabric, not just re-folding it the same way.

Does a tandem flight have its own reserve?

Every legitimate tandem operation does, sized for the combined weight of pilot and passenger and repacked on the same schedule as a solo reserve — it isn't an add-on, it's part of the certified system. If you're booking a first tandem flight, a school that can't tell you when the reserve was last packed is telling you something about the rest of their maintenance too.

What does a reserve actually cost?

A new reserve runs $700–$1,000 in the US or €550–€800 in Europe, with repacks at $50–$100 (€40–€60) each — a small slice of the full cost of getting into the sport, and not the place to cut it. A used reserve without a repack log is a real risk, not a bargain: the fold date is the one thing you can't verify by looking at the fabric.

Where a tool actually helps here is after the emergency, not during it: OutDare's crash-SOS alerting uses your phone's accelerometer to detect a hard impact and pings your emergency contacts and any OutDare pilots flying within 40 km, alongside a live flight link so people already know roughly where you are. It won't make the decision to throw for you and it won't replace an SIV course — but it shortens the gap between something going wrong on the ground and help actually arriving, which is exactly the part reserve training doesn't cover.

Carry a repacked reserve, know your type's real numbers, and get the decision trained into you at an SIV course before you ever need it for real.