Air Design Ultralight Flying Object 18", Руководство и сервисная книжка

Страница: 43 / 80

42
ATTENTION : In a stable spiral the G-forces are very high. Be aware that it may therefore
require considerable more input and effort to recover from this state.
IMPORTANT SATEFY NOTICE ! A pilot who is dehydrated and/or not accustomed to spiralling
can lose consciousness during a steep spiral dive!
ii. B-line stall
This is an effective way of making a moderate to rapid descent but doesn’t allow any forward
speed.
Initiation : Take hold of the B-risers (blue marked - both sides at same time) and slowly but
smoothly pull them down, twisting your hands until the canopy shows a span-wise crease at
the B-line attachment points and stops flying forward. Your sink rate will increase while your
forward speed will reduce to practically zero.
Recovery : Let go of the risers smoothly but determinedly and symmetrically, the glider will
speed up and gain forward movement. The brakes are kept in your hands at all times during
this manoeuvre. When exiting take care not to pull the brakes.
ATTENTION : IF THE B-RISERS ARE PULLED DOWN TOO MUCH THE WING MAY LOOSE ITS
SPANWISE FORM OR THE TIPS COME IN FRONT OF THE CENTRE OF THE WING. IN THIS
INSTANCE THE B-RISERS MUST BE RELEASED IMMEDIATELY.
iii. “Big-ears”
This is the easiest and safest technique for descent while maintaining forward speed.
Depending on how much of the wing-tip you deflate, 3m/s to 5m/s sink rate can be achieved.
The tendency for the wing to collapse is reduced while flying with big-ears.
Initiation : Reach up high and take hold of the “outer” A-line on each side of the glider. Pull
both sides down simultaneous. Hold them in firmly. The tips will fold in. Make sure the lines
are pulled down equally on each side and your big ears are even.
Recovery : In general the ears are opening by itself when releasing the outer A-line. Sometimes
last cells can stay closed. For supporting the reopening pull a little on the brakes.
ALL RAPID DESCENT MANOUVRES SHOULD BE FIRST PRACTICED IN CALM AIR, WITH
SUFFICIENT ALTITUDE AND WITH QUALIFIED SUPERVISION.
REMEMBER:
A wrong manoeuvre at the wrong time may change a straightforward situation into a
dangerous problem. Extreme manoeuvres also expose your glider to forces which may damage
it.

Practice these techniques under qualified supervision preferably during a safety
training course

Before initiating a manoeuvre make sure that the airspace below is clear of
obstructions or other pilots.

During manoeuvres watch both the glider and altitude above the ground.