FAQ: round and cruciform parachutes

Cruciform parachutes

Why do cruciform parachutes by independence open so fast?

Due to its special way of being packed, the parachute can easily fill with air without time lag directly after deployment. Additionally the low construction height of our cruciform parachutes has only little volume to be filled.

Why do cruciform parachutes by independence show such high pendulum stability?

Defined outlet ports at each corner as well as a slightly asymmetric canopy lead to a steady flow around the canopy. An unregular outlet, which would cause pendulum movements, thereby can be prevented.

Why do cruciform parachutes by independence have such a low sink rate?

The low construction height of our cruciform parachutes and a quite flat top side, in comparison with an annular parachute, provide a far larger projected surface at same material quantity.

Their slight lateral movement and resultant ascending force additionally reduce the sink rate.

Is the lateral movement of independence cruciform parachutes dangerous?

No! Lateral movement of our cruciform parachutes is below walking pace, thus usually below wind speed.

To laterally hit a barrier consequently is pretty much unlikely and according to its speed wouldn't cause much harm. Additionally the lateral movement is reduced by the air drag of the paraglider, which usually stays attached to the pilot. To separate the glider is not possible in most cases anyway, because of the carabiners and accelerating systems used - and not necessary anyhow!

Its a known fact for many years, that annular parachutes do show lateral movements as well! The according glide ratio, especially of small annular parachutes with heavy total load, is quite high in comparison with our EVO Cross or Ultra Cross. Small annular parachutes could never reach those sink rates merely by the according air drag. That's why low sink rates outweigh slight lateral movements.

Are independence cruciform parachutes steerable?

No! That's neither necessary nor favoured!

Usually a rescue system is activated at an altitude of 100m or even less. It is absolutely unrealistic to presume the pilot, at an remaining air time of about 20 seconds (altitude 100m), being able to carry out following steps:

  • activate rescue system
  • separate speed system
  • separate paraglider
  • get hold of steering lines of the rescue parachute
  • find and land on a suitable landing area.
Particularly Ultra Cross is so light. Is its material robust and durable?

Of course it is! All rescue systems undergo the same tough material tests! There is no difference at all between tests for a light-weight rescue parachute and a normal rescue parachute.

The fabric used for Ultra Cross is made of the same high grade nylon 6.6 like the fabric used for an Annular Classic or Annular EVO – only its filament is much thinner. Thats why its durability is identical to thicker fabrics.

Round parachutes

Aren't ram air pockets just a marketing gimmick?

No! Far from it. Our Annular Evo series have been certified for the first time not only according to LTF specifications, but also according to EN specifications.

Our first Annular Evo series had been developed and certified without ram air pockets. But by that time we were not pleased with the results during EN certification test concerning constancy and deployment time, as EN tests are much closer to practical experience than LTF test. After analysing these results, we decided to develop deployment accelerators for all our round rescue parachutes in order to enhance deployment certainty and accelerate the deployment.

And we are absolutely pleased with our development result: Constant and low deployment time! Anyhow - we had to undergo certification for all certified models again, a costly measure, but worth the effort.

I own an older independence rescue system. Is it possible to refit ram air pockets?

Yes! It is possible to refit all previous Annular or Piccolo models with ram air pockets. Refitting is straightforward and available at reasonable price. Costs charged for a refitting: 110,- € (incl. 19% VAT). This price includes:

  • Fitting ram air pockets
  • Re-packing rescue system
  • Check of rescue parachute
  • Shipping costs (within Germany and Austria)

Further information on rescue systems

We have compiled lots of comprehensive information on rescue parachutes as well as frequently asked questions on these pages: