Oui Piwi, tu as raison, c’est un 3-6 normal (enfin, de moins en moins engagé)…
Pour info, extrait d’acromania.nl (super site pour ceux qui veulent comprendre l’acro ! Au passage, le gars est d’accord avec moi pour l’apprentissage sur l’eau…) :
[quote]Ground Spiral
Description
The ground spiral (also called death spiral) is a normal spiral that you lead out just before hitting the ground really hard. If you control normal spirals very good, then this maneuver isn't really difficult. You just need iron balls, and you can NOT make a single mistake.
Lead in
I strongly advise you not to do this trick at all. If you do it, do it over water. This trick is also called DEATH spiral: FOR A REASON!!!
Start spiralling at around 50 meters above the ground. Don't spiral too fast, just enough to get you a little bit higher than the inner wingtip. Now spiral down to the ground.
Lead out
When you're about to hit the ground in 3 seconds, lead out the spiral in one or two 360 degree turns. You will now hover over the ground, and the glider will finally climb so you can land safely.
Danger!
DEATH! If you forget to lead out, or you spiral too fast, you will most certainly die with incredible pain, even if doing this over water!
Remember in paragliding: height = safety. Ground = death. It's as simple as that/death.
Before trying this maneuver, print out the disclaimer above and put it in your pocket. Don't say I didn't warn you!
Video
Ground Spiral - Windows Media : http://krisz.3gteam.hu/video/GroundSpiral-hq.wmv
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Perso, je pense que c’est une figure que je ne tenterais jamais : l’acro sans gaz, c’est trop dangereux et risqué à mon goût.