MAC PARA MacJet, Руководство пользователя

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RAPID DESCENTS
Spiral dive:
Attention! Trim setting in slow or neutral and the power off when executing spiral
dive.
A spiral dive is the fastest way to lose altitude, however, the very high G-forces make it
difficult to sustain a spiral dive for long and it can place high loads on the pilot and
glider. By tensing ones abdominal muscles and a higher body tension you can to some
extent resist the high G-forces. Don't forget proper breathing! As soon as any, even
slight, light dizziness or impaired vision is noticed the spiral should be exited
immediately.
The MacJet has a very effective spiral dive. This allows rapid descent without stalling.
To enter a spiral dive the pilot should weight-shift on one side while slowly pulling the
brake gradually on the same side as weight-shifting. During a spiral dive the angle of
bank can be controlled by increasing or reducing the amount of inside brake. When
spiral diving the MacJet it is recommended that the outside brake is lightly applied. This
helps stabilize the wing and enables an easier and safer exit from the spiral. To exit,
release the inside brake slowly. The MacJet did not show a tendency to remain in a
stable spiral during testing. At high sink speeds or if the pilot keeps his weight on the
inside, the wing can stay in a continued deep spiral and has to be actively exited. This is
done by weight shifting to the outside and gentle braking of the outside wing.
WARNING!! Nearly all gliders will have a tendency to stay in the spiral if the sink-rate
exceeds around 15-m/s, depending on weight-shifting, wing loading and G-force. In fact
most gliders need a counter-input to end a turn.
Attention! Due to energy retention, the glider will climb a lot after a deep spiral-dive
release. If you apply inner brake and decelerate the glider for two or three turns, big
pendulum effects can be avoided.
WARNING!! Practise spiralling with caution and lower sink-rates to get a feel for the
gliders behaviour. A pilot who is dehydrated or not accustomed to spiralling can lose
consciousness in a steep spiral dive!
WARNING!! Never do big ears in spiral! In this manoeuvre a smaller number of lines is
carrying an excessive load multiplied by the centrifugal force, what can lead to damage
of the lines or even the paraglider itself.
Big ears:
As there is a lot of load on the “A’s” especially on the faster trim settings as we do not
recommend using big ears as descent technique under power. With a hard pull on the
outermost A-lines there is higher risk of collapse. A spiral may be a more efficient way to
get down.
When in big-ears without power, the horizontal speed is higher than the sink rate, unlike
a spiral dive or a B-line stall. This rapid descent technique is used to quickly and
horizontally exit a dangerous area in the desired direction. In order to collapse the
outside wing, pull the outside A-lines.