MAC PARA MacJet, Руководство пользователя

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RAPID DESCENTS
When the pilot holds the outside A1-risers on both sides and pulls them down, the
MacJet easily tucks the outside wings and enters a stable descent mode. The pilot
keeps hold of the brake handles along with the outside A1-risers in his hands. By
braking on one side and weight-shifting, the canopy remains steerable.
In order to increase the sink rate as well as the horizontal speed, this manoeuvre should
be done together with use of the speed system. Apply the speed system after big ears
are induced (step into the speed-bar before you grab the outer A1-risers). Big-ears
substantially reduce the risk of canopy stability problems in turbulent air. To exit Big-
ears release the A1-risers. The canopy does slowly self-recover. If not, or to quicken the
recovery, the pilot can gently apply brakes to the glider.
WARNING! Never do big-ears in spirals, as this may drastically reduce the number of
lines taking the already high loads, causing structural failure.
B-line stalls:
As there is a lot of load on the “B’s” as we do not recommend using B-Stall as descent
technique under power.
To induce a B-line stall without power, symmetrically pull down slowly on both B-risers,
until the canopy folds (parallel to its long axis). The airflow over the top surface is almost
fully detached and the canopy enters a vertical descent flight mode without forward
movement. Further pulling of the B-risers reduces the surface area more and increases
the sink rate. (Up to 8 m/s) Be careful, pulling too far or too rapidly may cause a frontal
horseshoe to form. To exit from this flight mode release the B-risers at first rapidly but
then gently (1 sec). The canopy surges forward re-attaching the airflow over the top
surface and resumes normal flight. When the B-risers are released, the brakes should
not be activated. This will give the canopy the chance to gain speed and resume normal
flight. On exit from a B-line stall on no account just release the B-risers, as this can
cause overloading. If canopy does not recover apply both brakes gently to recover or
pull the A-risers, until the canopy regains forward speed.
Summary:
For all extreme manoeuvres and rapid descents please note:
•
first practise manoeuvres with an instructor during safety training!
•
before inducing any manoeuvre the pilot must check that there are no other
airspace users below him!
•
during the manoeuvre the pilot must have the canopy within his view!