دوشنبه 17 آذر 1393
نویسنده: parapink5 learning training paragliding |
These tests, also called S.I.V. (Simulation d' Incident en Vol in French, meaning Flight Incident Simulation), are control maneuvers when flying,
particular situations will occur which we need to be dealt with. These
circumstances do not normally concern novices because students should fly in
The following exercises are described with a pilot's instruction syllabus in mind. We will also be outlining acrobatics which are not included in S.I.V tests.
Needless to say, all tests do not present identical degrees of difficulty. Always use supervision, especially the first time you attempt them. The instructor will advise you to have altitude, consult the manual of your canopy and take things in stride.
Dynamic full stall should be avoided by all but the most accomplished pilots. All tests should be performed over water while having necessary arrangements,such as a rescue boat, a lifevest etc. However, it is essential for everyone to be able to perform a tip fold (big ears), a one-side collapse and later a B line stall.
Extreme maneuvers by the King. [Nova archive]
• Wear gloves at all times. Otherwise the risers may burn
your hands through friction.
• All maneuvers alter the aerodynamic shape of the paraglider and it is unsafe to use them when there is no need from safety point of view.
• Always bear in mind that control maneuvers will impair equipment (stretch lines and canopy) and should not be overused.
1. Tip fold-big ears
2. One side collapse or asymmetric front deflation
3. Front collapse or symmetric tuck
5. B-line stall
6. Parachutal stall or deep stall
7. Spiral dive
10. Full stall
This is the most common and safest maneuver. The total surface of the paraglider after applying big ears is smaller and thus takes more load. The pilot performs big ears in order to lose height and make the wing more stable in turbulent conditions.
Keep your hands in the brake toggles, reach up and grasp the outboard lines of riser A. The manufacturer determines the number of lines which are safe to use for big ears. Usually in a set of 5 lines grasp 2 on each side. That is, less than half the number of lines of the A riser on each side. Grasp high to avoid pulling down the whole of A line. Then pull down these lines slowly and symmetrically. Check wing constantly. The outward tips should partially fold under.
What will happen? Not much. Your variometer will merely indicate a greater sink rate. Release the lines and pull gently on the brakes to eliminate big ears. Try again to pull down the said lines more dynamically for a larger tipfold. If you do it correctly you will get a descent rate of 5 to 6 m/s (1000 to 1200 FPM). The next stage involves guiding the paraglider by shifting your weight, as you cannot use your hands to turn with the use of the brakes.
Letting up the lines symmetrically allows you to recover. It is a good idea to apply the brakes to make the wing recover, but remember every wing performs differently. Practice with a safe margin of height.
• The wing obtains greater stability and solidity.
• The sink rate increases and often the horizontal speed falls, except for a few wing models.
• Performing "big ears" is the easiest way to loose altitude while your speed is not altered much. This is usefull to escape a cloudsuck.
• Avoid using "big ears" with modern paragliders during landing due to the tendancy to deepstall. With "big ears" your wing is not flying with the designed shape even though it is a fairly benign event.