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What part is indicated by C (the orange line)?

A cell A top line A diagonal rib A stabilo

A diagonal rib connects the upper left corner of a cell with the lower right, or sometimes runs across two or more cells.
This allows the use of fewer lines, reducing the weight and drag of the paraglider.

For a paraglider in the mountains, what wind speeds are considered safe to fly?

Only nil winds from 0 to 1 Bft. Only light winds from 2 to 3 Bft. Only with wind from 0 up to 3 Bft. Only with wind speeds over 3 Bft.

Wind results in turbulence in the mountains. While soaring on a ridge or at low dunes or flying in flatlands may be safe up to 4 Bft or a bit higher using a smaller mini-wing, in the mountains a wind speed up to 3 Bft (a maximum of 20 km/h) is the maximum for most pilots to fly safely. Strong winds are considered 25 km/h or over.

What is the weight of the fabric used to make paraglider canopies? (g/m²)?

500g/m² 350g/m² 35g/m² 10g/m²

Very light fabric strong enough for paragliders can be as light as 25g/m². Very strong and heavy fabric weighs 40g/m² or more.
At around 35g/m², you can calculate that the weight of the fabric of just the top and bottom sail of a 25m² canopy is a bit less than two kilos.

Why are the cell openings slightly pointed down?

To increase the aerodynamic properties of the paraglider. Because the airflow is coming from the front and below at an angle. To enable dirt or dust to fall out easily. To achieve a venturi effect.

The cell openings are positioned where the air flow hits the profile of the airfoil.

You are standing on take-off and you feel the wind coming a bit from the side. Is that a problem for a safe launch?

Yes that is a problem. We need the wind to be straight from the front to take off safely. Up to about 45 degrees is usually not a problem. You lay out the wing facing the wind and during the acceleration phase you correct your course to fly away straight from the take-off. Up to about 45 degrees is usually not a problem. You lay out the wing straight down the take-off and correct the wing during the inflation phase. Up to about 90 degrees is usually not a problem. You lay out the wing straight down the take-off and correct the wing during the inflation phase.

B is the only correct answer for an Alpine or forward launch in the mountains. When you choose to execute a reverse launch, C is a possibility as well. For a tow launch, sometimes a 90 degree crosswind can be safe to start for more experienced pilots.

Which pre-launch check is the most important?

Checking the lines and canopy are laid out cleanly. Checking your flight instruments. Checking your leg straps are fastened. Checking if there is sufficient thermal activity.

Even though all newer harnesses have a safety feature to prevent you from falling out of the harness if you forget your leg straps, this is very uncomfortable and on an older harness it may be a fatal mistake. Checking lines and canopy is of course very important as well.
See the section on Launching in the Basic techniques chapter.

What are the minimum requirements for a safe take-off?

The possibility to safely abort the launch. A light wind from the front. Clear of cables in a 500m radius. A, B en C are correct.

A straight headwind is not necessary, you can take off in a slight crosswind. The runway should be clear of cables and other obstacles, but a 500m radius is not necessary. It is however essential to be able to abort your launch, for example when you notice a knot in the lines.

Standing on launch you see a rain shower approaching. Do you take off?

No, flying in the rain is illegal under air law. Yes, paragliders are not affected by rain and the accompanying wind will dry the paraglider quickly. Yes, if you can be sure that you have landed before the rain shower arrives. No, rain showers are often accompanied by wind gusts, which can be very dangerous for paragliders. Additionally, a wet canopy is more dangerous to fly.

D is the only safe answer. You can never be sure that you have landed before the rain arrives, so C is risky. B is only partly true for light rains, but again you're taking a risk. A is not true, although flying in cloud is illegal in many countries.

You just landed. What do you do?

You bundle up the glider in a 'field pack' and take the shortest way to the designated packing area. You bundle up the glider in a 'field pack' and take the shortest way to the edge of the field and from there to the designated packing area. You report to the instructor. When he or she says it's ok, you bundle up the glider in a 'field pack' and walk to the designated packing area. You pack up your vulnarable glider on the spot and then you report to the instructor.

Directly after landing, look around for other gliders that are about to land and clear the landing area as quickly as possible, without disturbing others.

A pre-flight check should be executed...

...before take-off. ...after every flight. ...every six months or as often as the manufacturer recommends. ...only by your instructor.

Before you take off, you should check at least these things: pilot, lines, canopy, wind, airspace.

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