User guide

11
Minimum sink rate and max glide ratio.
The minimum sink rate can be found by pulling the brakes on by about 20 cm. the theoretical
max glide ratio is obtained by trimming the back risers.
Accelerated flight
Once you have become accustomed to flying the YAK, you can practice using the trimmers. These
enable you to increase the speed of your glider, and to have better penetration through the air
in stronger wind conditions. Expert pilots can also use the trimmers to better match their glide
to the angle of the slope. Caution: when flying accelerated, your wing will react in a quicker,
more responsive manner in turns and the glide angle will be a lot steeper. Learn and take advice
from a qualified instructor.
Active Flying
The YAK has a high internal pressure, high resistance to collapses and a high level of passive
security. However, it is recommended with this type of glider to adopt an active handling style
that will help you to fly safely. The key to active handling is to keep your glider above your
head. If the glider has a tendency to lag behind, raise your hands. If the glider has a tendency to
shoot forward, then control it with the brakes. In all cases, always remember to keep sufficient
air-speed and avoid over-piloting. Be ready to control the YAK on the roll axis also, piloting the
exit from spiral if needed.
In turbulent conditions
The YAK is a very stable glider and collapses on one or both of the front risers are extremely
rare. Extreme turbulence could generate a collapse but the YAK will resume normal flight in
almost all configurations. In case of any doubt, keep your hands at shoulder height and let the
glider fly.
However, if the glider shoots forward violently, control it with the brakes immediately. To help
your glider resume flight more rapidly, it is recommended to use an active handling style,
without being out of time with the wing’s movements.
Caution :
The YAK is not designed to perform manoeuvres outside the normal flight configuration. Our
test pilots have tested the various reactions in extreme situations; however we strongly
recommend that you do not perform stalls, manoeuvres and spins. It is also strongly
recommended not to fly any aerobatics with the YAK.