User manual

Discus Glider X
Aerosoft GmbH 2009
68
As mentioned earlier, the pilot learns to speed up when the total
energy variometer is indicating sink (to fly quickly out of the sink) and
to slow down when lift is indicated (to loiter in the lift to take the
most advantage of it). But with a total energy or netto variometer the
pilot does not necessarily know how much to speed up or slow down.
Indeed you will learn that speeding up causes the sink reading on a TE
vario to increase, as the glider is less efficient at higher speeds, making
it even more difficult to decide whether to speed up or slow down.
The „speed-to-fly“ variometer takes the burden of this complex
calculation away from the pilot, and although the needle looks like it is
behaving in a similar way to a TE or netto vario it is actually perfor-
ming the triple compensation calculations so the needle UP simply
means SLOW DOWN, and the needle DOWN means SPEED UP. This is
consistent with the direction the needle would move if it were
indicating underlying lift or sink, but the pilot no longer needs to
consider how much to accelerate or decelerate - the needle reads zero
when the optimal airspeed is reached.
Communication radio
La communication radio est très simple et a une portée limitée. La
fréquence est réglée à l‘aide des parties basse et haute du bouton sur
la section en bas à droite du panneau des cadrans.
Indicateur de vitesse
L‘échelle de 510 degrés du badin
permet une lecture précise de la
vitesse indiquée en km/h ou en
knots (noeuds) selon vos
réglages dans FSX.