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safety : Canopy Control : 4 Smart Questions That Shut Down The Spin Cycle

4 Smart Questions That Shut Down The Spin Cycle

How to Avoid Spinning Malfunctions

Skydiving Article Image1
Image by Oliver NŲthen

Ah, to be swung madly around the ballroom of the sky.

If you like that sort of thing, of course. Most of us, yíknow, donít.

Even though theyíre eminently preventable, spinners remain a very statistically significant cause of cutaways. Thereís good news, however: A little attention will go a long way towards making sure you arenít dancing downward under a misbehaving main. Hereís how to get your body, brain and gear set up right.

1. Are you bungling the basics?

If spinning mals come up more than occasionally for you, consider whether you need to send yourself back to packing (or body-position) school. Might be the case.

2. Are you just being loopy?

Back when side ponytails were sexy and just about everything smelled like Teen Spirit, the skydiving industry used Velcro to secure toggles to risers. When manufacturers made the switch to the velcro-free designs we see now, they forgot about something vitally important: the long, floppy bights in the steering line that were now suddenly exposed to the rodeo ride of the deployment process.

Those mile-long bights took the opportunity to lasso anything they could. A particular favorite: hands. One misplaced toggle grab, and a skydiver could easily find him/herself in a compromising bondage situation with their control lines. The bights happily welcomed guide rings into the act. It was a ready-made recipe for a super-solid spinner, and it was ugly.

Soon, every single manufacturerís rig designs had integrated line stowing features (ďkeepersĒ). Thereís a reason the changes were made: as a jumper, you need that line tucked safely away until youíre good and ready to release the brakes. That said: Many of those old risers are still around, unmodified. Even more bafflingly, some skydivers donít bother stowing the lines during the packing process (presumably, to save 20 seconds or so). If thatís you, you know what to do. And if you have Velcro on your risers, for the love of god check it for airworthiness.

3. Are your catís eyes conspiring against you?

Toggles love the catís eyes of brake lines. They dive at the chance to snuggle and lock in a spinny embrace.

Itís no wonder thatís the case: after all, their relationship is really hot. The heat thatís generated by the sliderís travel over the lines has a shrinking effect on the system, creating a kind of Chinese fingertrap for your toggle seating. With one toggle in and one toggle out, youíre going to be going for a ride.

A rigger can quickly suss out if your catís eyes are in good shape: big enough for the toggle to pull out smoothly, but not so capacious that the toggleís fat bits can pass through. If they need replacing, do it.

4. Do you know when to let go?

Spinning malfunctions are sneaky bastards. For all their preventability, they have killed people. Make no mistake: Once youíre looking at one, you need to take it seriously.

The most important thing you need to remember is this: a spinning malfunction is not a line twist. When youíre under a docile, level main thatís flying cheerfully along as you swear at it, youíre looking at a line twist. When youíre not directly below a canopy thatís flying level -- when itís flinging you outwards as it heads for the ground -- you are on the business end of a spinner. The first is an inconvenience. The latter is a mal, and youíd better get on it.

As wing loading increases, so does the violence of the spin, and the likelihood that youíre going to kick out of it quickly dissolves. So: Donít fight it. Just get rid of it. Take some quality time with your reserve. Youíll be glad you did.

About Annette O'Neil:

Annette O'Neil is a copywriter, travel journalist and commercial producer who sometimes pretends to live in Salt Lake City. When she's not messing around with her prodigious nylon collection, she's hurtling through the canyons on her Ninja, flopping around on a yoga mat or baking vegan cupcakes.




By Annette O'Neil on 2016-01-14 | Last Modified on 2017-07-19

Rating: 12345   Go Login to rate this article.  | Votes: 11 | Comments: 6 | Views: 9764

6 Comments

GoneCodFishing
GoneCodFishing  2016-01-16

That slider is upside down...


bryanburke
bryanburke  2016-01-17

Skydive Arizona probably has the largest data base of reserve rides in the world -several years of trying to get details on every reserve ride at the busiest DZ on the planet. Two things stand out. One: spinning line twist malfunctions are the single biggest cause of reserve rides. The probability of this malfunction goes up geometrically with wing loading. SLT malfunctions are very rare below about 1.4. Two: the second biggest cause of malfunctions at SDAZ is brake problems. Stuck toggle, brake fire, brake line tied to toggle, guide ring, hand, etc. These often result in SLT malfunctions. Premature toggle release was virtually unheard of before Velcro-less systems. Get a very solid toggle retention system on your risers.

Bryan Burke
STA at SDAZ


hackish
hackish  2016-01-18

Interesting article but I think it misses some of the most important parts about harness/toggle symmetry that cause the spin in the first place.


Turboprop
Turboprop  2016-01-19

Both cutaways I had were as a result of this. Came back to packing: not enough unstowed line: so the bag lifted off, did not hit the burble properly, spun and that was the result.


skydived19006
skydived19006  2016-01-25

As Annette addressed in her 4th point, a spinning malfunction is not a glitch. A large percentage of skydivers revert back to their primary training with regard to line twists, and think that this is one that they can kick out. It doesn't work! As Instructors, we need to teach at FJC that a spinning canopy is a malfunction, regardless the cause. I've seen way to many folks end up at or below 1000' trying to recover from this, and also one fatality. Brian G has a great example of what is required to "fix" a spinning line twist on Youtube. https://www.youtube.com/watch?v=-17AHJQQ8fA


NvyZero
NvyZero  2016-01-26

https://www.youtube.com/watch?v=ijbfIAxqmoI Spinning linetwist fun! A senior instructor told me to Arch when I find myself under spinning line twists. This has gotten me out of a few hairy situations, this being one of them. This changes your center of gravity and you find yourself under a level wing able to kick(variables permitting). This happened bc I free stowed my lines (2 locking stows) in the main tray, got riser slap on my camera which caused the bag to spin bc I was not going terminal. Thought I'd share the knowledge!


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